CN120815647A - Transmissionless flotation device - Google Patents

Abstract

The present invention belongs to the technical field of mineral processing, and specifically relates to a transmission-free flotation device. The transmission-free flotation device comprises: a flotation tank with a middling ore discharge port at the bottom; a material distribution assembly passing through the flotation tank and communicating with the flotation tank; a middling ore circulation assembly communicating with the middling ore discharge port; a mineralization assembly communicating with the middling ore circulation assembly; an injection assembly communicating with the mineralization assembly and the flotation tank and located below the material distribution assembly; an underflow discharge pipe communicating with the flotation tank and located between the injection assembly and the middling ore discharge port, the diameter of the underflow discharge pipe being smaller than the diameter of the middling ore discharge port; and a foam discharge assembly located at the top of the flotation tank and passing through the flotation tank and communicating with the flotation tank.

Description

Transmission-free flotation device

Technical Field

The application belongs to the technical field of mineral processing, and particularly relates to a transmission-free flotation device.

Background

Flotation is a method for sorting minerals according to differences in floatability of minerals according to differences in the physicochemical properties of the surfaces of the mineral particles. Conventional flotation systems rely on mechanical stirring devices to achieve mixing of pulp and bubbles, but suffer from the following problems:

1, the recycling efficiency of middlings is low, coarse-grained minerals are difficult to remineralize effectively after sedimentation, and the recovery rate is limited.

2, Mechanical transmission parts are easy to wear, the energy consumption is high, and the cost is high.

Disclosure of Invention

In order to solve the technical problems, the invention provides a transmission-free flotation device, which aims to solve the technical problems of low recovery rate and high cost of a flotation process at least to a certain extent.

The technical scheme of the invention is as follows:

A transmission-free flotation device comprises a flotation tank, a material distribution component, a middling circulation component, a mineralization component, an injection component, an underflow discharging pipe and a foam discharging component, wherein the middling discharging hole is formed in the bottom of the flotation tank, the material distribution component penetrates through the flotation tank and is communicated with the flotation tank, the middling circulation component is communicated with the middling discharging hole, the mineralization component is communicated with the middling circulation component, the injection component is communicated with the mineralization component and the flotation tank and is positioned below the material distribution component, the underflow discharging pipe is communicated with the flotation tank and is positioned between the injection component and the middling discharging hole, the diameter of the underflow discharging pipe is smaller than that of the middling discharging hole, and the foam discharging component is positioned at the top of the flotation tank and penetrates through the flotation tank and is communicated with the flotation tank.

In some embodiments, the flotation tank comprises a tank body and a containing body, wherein the containing body is connected with the tank body to form a containing cavity, the bottom of the containing body is provided with a middling discharging hole, the side part of the containing body is communicated with the underflow discharging pipe, the material distributing component penetrates through the tank body and is communicated with the containing cavity, and the cross section area of the containing body gradually decreases along the direction from the material distributing component to the middling discharging hole.

In some embodiments, the material distribution assembly comprises a plurality of material distribution pipes arranged in the flotation tank, and a material inlet pipe penetrating through the flotation tank and communicated with the plurality of material distribution pipes, wherein the plurality of material distribution pipes are uniformly arranged around the circumferential surface of the material inlet pipe at equal angles.

In some embodiments, the middling circulation assembly comprises a middling feeding pipe, a middling annular pipe and a mineralization assembly, wherein the middling feeding pipe is positioned outside the flotation tank and communicated with the middling discharging hole, the middling annular pipe is positioned outside the flotation tank and communicated with the middling discharging pipe, and the middling annular pipe is arranged outside the flotation tank in an enclosing mode and communicated with the mineralization assembly.

In some embodiments, the mineralization assembly includes a plurality of microbubble bubble generators each located outside the flotation tank and each in communication with the middling collar and the spray assembly, a plurality of compressed air hoses in communication with the corresponding microbubble bubble generators, and a compressed air collar in communication with the plurality of compressed air hoses. And the first control valve is arranged on the compressed air hose.

In some embodiments, the spray assembly comprises a plurality of mineralization pipes penetrating through the flotation tank and corresponding to the microbubble bubble generators one by one, and a plurality of spray heads arranged in the flotation tank and corresponding to the mineralization pipes one by one, wherein the spray heads are communicated with the corresponding microbubble bubble generators.

In some embodiments, the spray direction of the spray head faces the distributing component, and the included angle between the spray direction and the horizontal plane is 30-60 degrees.

In some embodiments, the mineralization tube has a diameter that is less than the diameter of the middling collar.

In some embodiments, the foam discharging assembly comprises a foam chute arranged in the flotation tank and positioned at the top of the flotation tank, and a foam pipe penetrating through the flotation tank and communicated with the foam chute.

In some embodiments, the underflow discharge pipe is provided with a second control valve, the gearless flotation device further comprises a floating ball arranged in the flotation tank, a detector arranged outside the flotation tank and opposite to the floating ball for detecting the height of the floating ball, and a controller electrically connected with the second control valve and the detector.

The beneficial effects of the invention at least comprise:

Because the middling discharge gate has been seted up to the flotation tank bottom, the feed divider is worn to locate the flotation tank to communicate with the flotation tank, consequently, mix ore pulp and flotation reagent to even state in the stirred tank, form the raw ore pulp, the raw ore pulp passes through the feed divider dress subassembly and gets into the flotation tank, and make the raw ore pulp of giving into through the feed divider and be even low pressure distribution and get into the flotation tank, help raw ore pulp can not form the torrent when getting into the flotation tank, thereby promote laminar flow state, improve separation efficiency.

Because the middling circulation assembly is communicated with the middling discharge port, the mineralization assembly is communicated with the middling circulation assembly, the spraying assembly is communicated with the mineralization assembly and the flotation tank and is positioned below the material distribution assembly, the underflow discharge pipe is communicated with the flotation tank and is positioned between the spraying assembly and the middling discharge port, the foam discharge assembly is positioned at the top of the flotation tank and penetrates through the flotation tank to be communicated with the flotation tank, therefore, raw ore pulp enters the middling circulation assembly through the middling discharge port, the middling circulation assembly conveys the raw ore pulp to the mineralization assembly to mineralize the raw ore pulp so as to mineralize the raw ore pulp into hydrophilic minerals, hydrophobic minerals and middlings (coarse particles or intermediate products which are not fully mineralized in the raw ore pulp), the hydrophilic minerals, the hydrophobic minerals and middlings are sprayed into the flotation tank through the spraying assembly so that the hydrophobic minerals reach the foam discharge assembly under the action of floating force, the hydrophilic minerals and middlings are discharged through the foam discharging group, the hydrophilic minerals and middlings sink under the action of gravity, the diameter of the underflow discharging pipe is smaller than that of the middling discharging hole, the hydrophilic minerals are discharged through the underflow discharging pipe, the middlings fall to the middling discharging hole, the middling circulating assembly conveys the middlings to the mineralizing assembly to mineralize the middlings, the middlings can be circularly mineralized, the middlings can be fully mineralized, the recovery rate is improved, meanwhile, the jet assembly is positioned below the distributing assembly, and the middling circulating assembly only conveys the material of the middling discharging hole and is separately processed with the feeding of the distributing assembly, so that the mixing interference of the fresh raw ore pulp to the circulating middlings can be avoided when the distributing assembly conveys the fresh raw ore pulp into the flotation tank, the risk of repeated separation of the hydrophilic minerals is reduced, and a mechanical stirring device is not needed, so that the energy consumption is reduced, and the cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of a non-driven flotation device of some embodiments;

Fig. 2 is a top view of a non-driven flotation device.

In the accompanying drawings:

A flotation tank 10, a middling discharge hole 11, a tank body 12 and a containing body 13;

a distributing component 20, a distributing pipe 21 and a feeding pipe 22;

a middling circulation assembly 30, a middling feeding pipe 31, a middling annular pipe 32;

A mineralization assembly 40, a microbubble bubble generator 41, a compressed air hose 42, a compressed air loop 43, a first control valve 44;

a spray assembly 50, a mineralization tube 51, a spray head 52;

An underflow discharge pipe 60;

A foam discharge assembly 70, a foam chute 71, a foam tube 72;

a float 80;

A detector 90;

a support base 100.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all the directional indicators in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "fixed" may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The application is described below with reference to specific embodiments in conjunction with the accompanying drawings:

the transmission-free flotation device provided by the embodiment aims to at least solve the technical problems of low recovery rate and high cost of a flotation process to a certain extent.

Fig. 1 is a schematic structural view of a non-driven flotation device according to some embodiments, and fig. 2 is a top view of the non-driven flotation device. Referring to fig. 1 and 2, the non-driven flotation device according to the embodiment of the present application includes a flotation tank 10, a separation module 20, a middling circulation module 30, a mineralization module 40, a spray module 50, an underflow discharge pipe 60, and a froth discharge module 70. The bottom of the flotation tank 10 is provided with a middling discharging hole 11. The material distribution assembly 20 penetrates through the flotation tank 10 and is communicated with the flotation tank 10. The middling recycling assembly 30 communicates with the middling outlet 11. The mineralization assembly 40 is in communication with the middling recycling assembly 30. The jet assembly 50 communicates with the mineralization assembly 40 and the flotation tank 10 and is located below the distribution assembly 20. An underflow discharge pipe 60 communicates with the flotation tank 10 and is located between the jet assembly 50 and the middling outlet 11, the diameter of the underflow discharge pipe 60 being smaller than the diameter of the middling outlet 11. The froth discharging assembly 70 is positioned at the top of the flotation tank 10 and is disposed through the flotation tank 10 in communication with the flotation tank 10.

Because the bottom of the flotation tank 10 is provided with the middling discharge hole 11, the material separating assembly 20 penetrates through the flotation tank 10 and is communicated with the flotation tank 10, ore pulp and flotation agents are mixed to be in a uniform state in the stirring tank to form raw ore pulp, the raw ore pulp enters the flotation tank 10 through the material separating assembly, the raw ore pulp fed into the flotation tank 10 is promoted to be uniformly distributed at low pressure through the material separating assembly 20, and the raw ore pulp is helped not to form turbulent flow when entering the flotation tank 10, so that laminar flow state is promoted, and separation efficiency is improved.

Since the middling recycling assembly 30 is communicated with the middling discharging port 11, the mineralizing assembly 40 is communicated with the middling recycling assembly 30, the spraying assembly 50 is communicated with the mineralizing assembly 40 and the floatation tank 10 and is positioned below the material distributing assembly 20, the underflow discharging pipe 60 is communicated with the floatation tank 10 and is positioned between the spraying assembly 50 and the middling discharging port 11, the foam discharging assembly 70 is positioned at the top of the floatation tank 10 and is penetrated into the floatation tank 10 and is communicated with the floatation tank 10, therefore, raw ore pulp enters the middling recycling assembly 30 through the middling discharging port 11, the middling recycling assembly 30 conveys the raw ore pulp to the mineralizing assembly 40 to mineralize the raw ore pulp into hydrophilic minerals, hydrophobic minerals and middlings (coarse particles or intermediate products which are not fully mineralized in the raw ore pulp), the hydrophilic minerals, the hydrophobic minerals and middlings are sprayed into the floatation tank 10 through the spraying assembly 50, so that the hydrophobic minerals reach the position of the foam discharging assembly 70 under the action of the buoyancy and are discharged through the foam discharging assembly, the hydrophilic minerals and middlings sink under the action of gravity, the diameter of the underflow discharging pipe 60 is smaller than that of the middling discharging opening 11, the hydrophilic minerals are discharged through the underflow discharging pipe 60, the middlings fall to the middling discharging opening 11, the middling circulating assembly 30 conveys the middlings to the mineralizing assembly 40 to mineralize the middlings, the middlings can be circularly mineralized, the middlings are fully mineralized, the recovery rate is improved, meanwhile, since the jet assembly 50 is positioned below the distributing assembly 20, and the middling circulating assembly 30 only conveys the material of the middling discharging opening 11 and the feeding of the distributing assembly 10 is separately processed, therefore, when the distributing assembly 20 conveys fresh raw ore pulp into the flotation tank 10, the method can avoid mixing interference of fresh raw ore pulp to circulating middlings, reduce the risk of repeated separation of hydrophilic minerals, avoid mechanical stirring devices, reduce energy consumption and reduce cost.

In some embodiments, the slurry and the flotation reagent are mixed to a homogeneous state in a stirred tank to form a raw slurry. The flotation reagent comprises a collector and a foaming agent, and the addition amount of the flotation reagent is 0.01% -0.5% of the mass of the ore pulp.

In some embodiments, in order to ensure that middlings can enter the middling outlet 11, in connection with fig. 1, the flotation tank 10 comprises a tank body 12 and a receiving body 13. The holding body 13 is connected with the trough body 12 to form a holding cavity, the bottom of the holding body 13 is provided with a middling discharging hole 11, and the side part of the holding body 13 is communicated with the underflow discharging pipe 60. Wherein, the feed divider assembly 20 wears to locate the cell body 12 and holds the chamber intercommunication, along the direction of feed divider assembly 20 to middling discharge gate 11, holds the sectional area of body 13 and reduces gradually.

Hydrophilic minerals and middlings sink under the action of gravity, when the hydrophilic minerals and middlings reach the accommodating body 13, the sectional area of the accommodating body 13 is gradually reduced, that is, the inner wall of the accommodating body 13 is an inclined plane, middlings fall into the middling discharging port 11 along with the inclined plane, and the side part of the accommodating body 13 is communicated with the underflow discharging pipe 60, so that when the hydrophilic minerals slide along with the inclined plane, the hydrophilic minerals can be discharged through the underflow discharging pipe 60, the risk of repeated separation of the hydrophilic minerals is further reduced, and the recovery rate is improved.

In some embodiments, the dispensing assembly 20 communicates with the tank 12, the jetting assembly 50 is located within the tank 12, and the foam discharging assembly 70 is located at the top of the tank 12.

In some embodiments, the accommodating body 13 may be a cone or a truncated cone.

In some embodiments, to ensure the service life of the flotation cell 10, the inner walls of the cell body 12 and the inner walls of the receiving body 13 are each provided with a wear resistant ceramic coating.

In some embodiments, and referring to fig. 1 and 2, in order to ensure uniform dispensing, the dispensing assembly 20 includes a dispensing tube 21 and a feeding tube 22. A plurality of dividing pipes 21 are provided in the flotation tank 10. The feed pipe 22 is provided through the flotation tank 10 in communication with a plurality of feed dividing pipes 21. Wherein a plurality of dividing pipes 21 are uniformly spaced at equal angles around the circumferential surface of the feed pipe 22.

When raw ore pulp enters the plurality of distributing pipes 21 through the feeding pipe 22, as the plurality of distributing pipes 21 are uniformly arranged around the circumferential surface of the feeding pipe 22 at equal angles, the plurality of distributing pipes 21 can enable the raw ore pulp to be uniformly distributed in the flotation tank 10, the plurality of distributing pipes 21 extend along the radial direction of the feeding pipe 22, so that the plurality of distributing pipes 21 are transversely dispersed in the flotation tank 10, the fed raw ore pulp can be enabled to be uniformly distributed at low pressure and enter the flotation tank 10, turbulence is not formed when the raw ore pulp enters the flotation tank 10, laminar flow state is promoted, and separation efficiency is improved.

In some embodiments, the distributing pipe 21 is of an annular multi-pipe-opening uniform distribution structure, and the flow rate of ore pulp with the pipe diameter of DN 100-DN 150mm passing through the distributing pipe 21 is less than or equal to 0.5m/s.

In some embodiments, the dispensing assembly 20 further includes a first slurry pump. The first slurry pump is arranged on the feed pipe 22, mineralized slurry is pumped into the feed pipe 22 by the slurry pump under the pressure of 0.05-0.15 MPa, and raw slurry enters the flotation tank 10 in a laminar flow state under the uniform distribution effect of the plurality of separating pipes 21 in the flotation tank 10.

In some embodiments, and with reference to fig. 1 and 2, to achieve cyclic mineralization of middlings, the middling recirculation assembly 30 includes a middling feed pipe 31 and a middling collar 32. A middling feed pipe 31 is located outside the flotation tank 10 and communicates with the middling outlet 11. The middling ring canal 32 is positioned outside the flotation tank 10 and is communicated with the middling discharging pipe 31, and the middling ring canal 32 is arranged outside the flotation tank 10 in a surrounding way and is communicated with the mineralization assembly 40.

Middlings can enter the middling feeding pipe 31 through the middling discharging hole 11 and are conveyed to the middling annular pipe 32 through the middling feeding pipe 31 and are conveyed to the mineralizing component 40, so that the mineralizing component 40 can mineralize middlings, and recovery rate is improved.

In some embodiments, the middling feeding pipe 32 is communicated with the middling discharging hole 11 through a conveying pipeline, a second slurry pump is arranged on the conveying pipeline, and after middling enters the conveying pipeline from the middling discharging hole 11, the middling is pressurized to 0.15-0.35 MPa through the second slurry pump so as to be conveyed to the middling feeding pipe 32.

In some embodiments, and in conjunction with FIG. 1, to achieve mineralization, mineralization assembly 40 includes a microbubble bubble generator 41, a compressed air hose 42, a compressed air collar 43, and a first control valve 44. A plurality of microbubble bubble generators 41 are each located outside the flotation tank 10 and are each in communication with the middling collar 32 and the jet assembly 50. The plurality of compressed air hoses 42 correspond to the plurality of microbubble bubble generators 41, and the compressed air hoses 42 communicate with the corresponding microbubble bubble generators 41. The compressed air grommet 43 communicates with a plurality of compressed air hoses 42. A first control valve 44 is provided to the compressed air hose 42.

The compressed air loop pipe 43 is communicated with an external compressed air machine, the compressed air loop pipe 43 can convey compressed air to the corresponding micro-bubble generator 41 through the compressed air hose 42, middling and compressed air are mixed and cut in the micro-bubble generator 41 through the middling loop pipe 32 to form a gas-liquid-solid three-phase flow, the gas-liquid-solid three-phase flow enters the injection assembly 50, the gas-liquid-solid three-phase flow is injected into the flotation tank 10 through the injection assembly 50, hydrophobic minerals float to the foam discharging assembly 70 along with micro-bubbles and are discharged through the foam discharging assembly 70, and hydrophilic minerals and middling fall under the action of gravity.

In some embodiments, the air supply pressure of the compressed air is 0.4-0.6 MPa, and the volume ratio of the air to the liquid is 1:2-1:10.

In some embodiments, the bubble generation aperture of the microbubble bubble generator 41 is 0.1-0.5 mm, the average diameter of the generated bubbles is less than or equal to 200 μm, and the distribution range of the bubble diameters is 50-300 μm.

In some embodiments, since the first control valve 44 is disposed on the compressed air hose 42, the opening of the first control valve 44 can be adjusted to adjust the flow rate of the compressed air entering the microbubble bubble generator 41 through the compressed air hose 42, and at the same time, the pressure and the air volume of the compressed air entering the microbubble bubble generator 41 can be adjusted to control the size of the bubbles generated by the microbubble bubble generator 41, so as to achieve the matching of the bubble size with the particle size of the hydrophobic mineral, thereby achieving high system stability and improving the recovery rate.

In some embodiments, and with reference to FIGS. 1 and 2, to ensure a sorting effect, the spray assembly 50 includes a mineralization tube 51 and a spray head 52. The mineralization pipes 51 are arranged in the flotation tank 10 in a penetrating manner and correspond to the microbubble bubble generators 41 one by one, and the mineralization pipes 51 are communicated with the corresponding microbubble bubble generators 41. The plurality of spray heads 52 are arranged in the flotation tank 10 and correspond to the plurality of mineralization pipes one by one, and the spray heads 52 are communicated with the corresponding mineralization pipes 51.

The gas-liquid-solid three-phase flow formed by the microbubble bubble generator 41 enters the mineralization pipe 51 and is conveyed to the spray head 52 through the mineralization pipe 51, the spray head 52 sprays the gas-liquid-solid three-phase flow into the flotation tank 10, and the separation of hydrophilic minerals and hydrophobic minerals is facilitated under the action of the sprayed impact force, so that the separation effect is ensured.

In some embodiments, to allow the hydrophobic mineral to reach the froth discharge assembly 70, the spray head 42 sprays the direction of the gas-liquid-solid three-phase flow toward the froth discharge assembly 70 at an angle of 30 ° to 60 ° to the horizontal, toward the separation assembly 20, to avoid the hydrophobic mineral being sprayed into the middling discharge port 11 and/or the underflow discharge pipe 60, and to improve recovery.

In some embodiments, to achieve that spray head 52 may spray a gas-liquid-solid three-phase flow, mineralization tube 51 has a smaller diameter than middling loop 32 to achieve pressurization of the gas-liquid-solid three-phase flow within mineralization tube 51 so that the gas-liquid-solid three-phase flow may accelerate through mineralization tube 51 into spray head 52. The jet speed of the gas-liquid-solid three-phase flow is 2-5 m/s.

In some embodiments, and with reference to FIG. 1, to achieve drainage of hydrophobic minerals, a foam discharge assembly 70 includes a foam chute 71 and a foam tube 72. A froth chute 71 is provided in the flotation tank 10 and is located at the top of the flotation tank 10. The froth pipes 72 are provided through the flotation cell 10 in communication with the froth chute.

The hydrophobic mineral floats up with the microbubbles so that the hydrophobic mineral reaches the froth chute 71, and the hydrophobic mineral is transported to the froth pipe 72 through the froth chute 71 to effect discharge of the hydrophobic mineral.

In some embodiments, the foam chute 71 may be in the shape of a letter-meter or cross, so as to shorten the running distance of the load bubbles and improve the recovery rate of the hydrophobic minerals.

In some embodiments, referring to fig. 1 and 2, to control the liquid level in the flotation tank 10, the underflow discharge pipe 60 is provided with a second control valve, and the non-driven flotation device further includes a float 80, a detector 90, and a controller. A float 80 is provided in the flotation tank 10. The detector 90 is disposed outside the flotation tank 10 and opposite to the float 80 for detecting the height of the float 80. The controller is electrically connected to the second control valve and the detector 90. Wherein the detector 90 may be an infrared detector.

After mineralization, a foam layer is formed in the flotation tank 10, the foam layer is positioned below the foam discharging component 70, when the thickness of the foam layer is thicker, the enrichment time of the hydrophobic mineral in the foam layer is long, so that the grade of the floated hydrophobic mineral is high, and when the thickness of the foam layer is thinner, the hydrophobic mineral can be discharged as soon as possible along with the foam, and the treatment capacity is high. While the thickness of the froth layer is related to the liquid level in the flotation tank 10, the froth layer is thicker when the liquid level in the flotation tank 10 is lower and thinner when the liquid level in the flotation tank 10 is higher. Thus, in order to control the thickness of the froth layer such that the amount and quality of the hydrophobic mineral to be floated meets the requirements, the float 80 may be lifted and lowered with the lifting of the liquid level in the separate flotation cell 10, the detector 90 may be able to detect the height of the float 80 to obtain an actual liquid level value in the flotation cell 10 and send the actual liquid level value to the controller, which compares the actual liquid level value with a set liquid level value to obtain a liquid level difference, since the flow of raw slurry delivered into the flotation cell 10 by the separation assembly 20 is fixed, the controller sends a control signal to the second control valve according to the liquid level difference to adjust the discharge amount of the underflow discharge pipe 60 by the second control valve to adjust the liquid level in the flotation cell 10 such that the actual liquid level value in the flotation cell 10 matches the set liquid level value.

In some embodiments, the second control valve is closed to shut off the underflow discharge pipe 60 as raw mineral slurry enters the flotation tank 10, and the second control valve opens the underflow discharge pipe 60 when the raw mineral slurry reaches a set level so that hydrophilic minerals within the flotation tank 10 can be discharged through the underflow discharge pipe 60.

In some embodiments, the outer wall of the flotation tank 10 is provided with a support base 100, by means of which support base 100 the sorting tank 10 is supported.

The application is further described below with reference to specific examples of use:

Taking ore dressing and desilication of a low-grade bauxite in Shanxi as an example, the chemical full-element analysis result of the raw bauxite is shown in table 1.

TABLE 1 Shanxi chemical full element analysis results of certain Low grade bauxite (%)

In the ore dressing process of a certain low-grade bauxite in Shanxi, the ore discharging amount is 75t/h, after the crude ore passes through a two-stage ball mill for closed circuit grinding, the overflow fineness of a hydrocyclone is-0.075 mm and is 92%, and ore pulp with the concentration of 26% directly enters a 4.5m non-transmission flotation cell device for flotation desilication after the crude ore pulp stirring barrel acts with a flotation reagent. The ore with better hydrophobicity is discharged as concentrate through a foam outlet pipe in the flotation separation unit, the ore pulp with weaker hydrophobicity is settled in the flotation separation unit, coarse ore pulp with better settling property is circulated as middling, and fine ore with weaker settling property is discharged through a bottom flow pipe as tailings.

Example 1

The ore pulp is fed into the flotation tank 10 by a pulp pump at a feed pressure of 0.1MPa, the number of the distributing pipes 21 is 6, the pipe diameter is DN100mm, middlings at the bottom of the tank body are discharged by a middling discharging hole 11, pressurized to 0.3MPa by a second pulp pump, sequentially conveyed to a mineralizing component 40 and a spraying component 50 by a middling feeding pipe 31 and a middling ring pipe 32, the air supply pressure of compressed air is 0.45MPa, the number of the microbubble bubble generators 41 is 12, the bubble generation aperture is 0.1mm, the number of the spray heads 52 is 12, the spraying direction is upward spraying obliquely, the included angle between the spray nozzles and the horizontal included angle is 30 degrees, and the caliber of the spray nozzles is 30mm. The slurry passing through the flotation cell 10 was subjected to a single roughing, double beneficiation, and double scavenging flotation process to obtain the following indices in table 2:

The table 2 below shows the following:

Table 2 example 1 beneficiation and desilication results

As shown in Table 2, the A/S ratio of the concentrate is improved from 2.33 to 5.03, the SiO2 removal rate is up to 42.9% (23.12%. Fwdarw.13.20%), and the raw material requirement of the Bayer process A/S >4.5 is met. The recovery rate of 66.17% of Al ₂O₃ is matched with the yield of 53.61%, and the method accords with a bauxite separation strategy of 'high tailing discarding and recovery protection'. Tailings a/S <1.2 indicates an efficient separation of silicate minerals. -0.075mm fines ratio but still achieve efficient recovery.

Example 2

The ore pulp is fed into the flotation tank 10 by a pulp pump at a feed pressure of 0.15MPa, the number of the distributing pipes 21 is 6, the pipe diameter is DN100mm, middlings at the bottom of the tank body are discharged by a middling discharging hole 11, pressurized to 0.4MPa by a second pulp pump, sequentially conveyed to a mineralizing component 40 and a spraying component 50 by a middling feeding pipe 31 and a middling ring pipe 32, the air supply pressure of compressed air is 0.55MPa, the number of the microbubble bubble generators 41 is 12, the bubble generation aperture is 0.1mm, the number of the spray heads 52 is 12, the spraying direction is upward spraying obliquely, the included angle between the spray heads and the horizontal included angle is 30 degrees, and the caliber of the spray nozzles is 30mm. The slurry passing through the flotation cell 10 was subjected to a single roughing, double beneficiation, and double scavenging flotation process to obtain the following indicators in table 3:

TABLE 3 mineral separation desilication results example 2

From Table 3, it can be seen that the concentrate A/S ratio is increased from 2.33 to 4.55, meeting the raw material requirements of Bayer process A/S > 4.5. Middlings are pressurized (0.45 MPa) and air pressure (0.6 MPa) to enhance pulp turbulence, coarse-grain minerals (+0.075 mm) suspension capacity are improved, sink loss is reduced, recovery rate is improved by 4.75%, selective capture of fine-grain Al ₂O₃ is reduced by excessive shearing force, and concentrate A/S ratio is reduced by 0.48.

Example 3

The ore pulp is fed into the flotation tank 10 by a pulp pump at a feed pressure of 0.05MPa, the number of the distributing pipes 21 is 6, the pipe diameter is DN100mm, middlings at the bottom of the tank body are discharged by a middling discharging hole 11, pressurized to 0.25MPa by a second pulp pump, sequentially conveyed to a mineralizing component 40 and a spraying component 50 by a middling feeding pipe 31 and a middling ring pipe 32, the air supply pressure of compressed air is 0.4MPa, the number of the microbubble bubble generators 41 is 12, the bubble generation aperture is 0.1mm, the number of the spray heads 52 is 12, the spraying direction is upward spraying obliquely, the included angle between the spray nozzles and the horizontal included angle is 30 degrees, and the caliber of the spray nozzles is 30mm. The slurry passing through the flotation cell 10 was subjected to a single roughing, double beneficiation, and double scavenging flotation process to obtain the following indicators in table 4:

Table 4 example 3 beneficiation desilication results

As can be seen from Table 4, the low feed pressure (0.05 MPa) and the middling pressurization pressure (0.25 MPa) form a mild flow field, so that the damage of turbulent flow to mineralized bubbles is reduced, the selective combination of microbubbles and fine-grained minerals is stronger, the content of concentrate SiO ₂ is reduced to 12.01% (the removal rate is 48.1%), the A/S ratio is up to 5.72, and the raw material requirement of the Bayer process A/S >4.5 is met.

Taking the beneficiation and desulfurization of certain high-sulfur bauxite in Guizhou as an example, the analysis results of the chemical total elements of the raw bauxite are shown in Table 5.

TABLE 5 chemical full elemental analysis results (%)

In the process of beneficiating certain high-sulfur bauxite in Guizhou, the ore discharging amount is 63t/h, after the crude ore passes through a section of ball mill for closed circuit grinding, the overflow fineness of a hydrocyclone is-0.075 mm and accounts for 81%, the concentration of ore pulp is 24%, and the ore pulp and a flotation reagent (collecting agent and foaming agent) are fully mixed in a stirring barrel and then enter a 4.5m flotation tank 10 for flotation desulfurization and separation.

Example 4

The ore pulp is fed into the flotation tank 10 by a pulp pump at a feed pressure of 0.12MPa, the number of the distributing pipes 21 is 6, the pipe diameter is DN100mm, middlings at the bottom of the tank body are discharged by a middling discharging hole 11, pressurized to 0.28MPa by a second pulp pump, sequentially conveyed to a mineralizing component 40 and a spraying component 50 by a middling feeding pipe 31 and a middling ring pipe 32, the air supply pressure of compressed air is 0.42MPa, the number of the microbubble bubble generators 41 is 16, the bubble generation aperture is 0.1mm, the number of the spray heads 52 is 16, the spraying direction is upward spraying obliquely, the included angle between the spray nozzles and the horizontal included angle is 30 degrees, and the caliber of the spray nozzles is 30mm. The slurry passing through the flotation cell 10 was subjected to one roughing, three beneficiation, and three scavenger flotation processes to obtain the following indices in table 6:

TABLE 6 example 4 beneficiation and desulfurization results

As shown in Table 6, the indexes of the aluminum concentrate are that the grade of Al ₂O₃ is increased to 59.05%, the content of SiO ₂ is reduced to 11.85%, the content of sulfur is reduced to 0.34% from 5.52%, the desulfurization rate is more than 93%, the yield is 86.28%, the recovery rate of alumina is 94.40%, and the aluminum concentrate meets the raw material requirement of alumina production by the Bayer process. Sulfur concentrate index, namely, sulfur enrichment is up to 38.13%, the sulfur concentrate reaches industrial grade product standard, the sulfur concentrate can be used for producing sulfuric acid, chemical fertilizers and the like, the yield is 13.72%, and the high-efficiency recovery of sulfur is realized.

Taking Sichuan ilmenite ore dressing as an example, the iron tailings from the mill enter a magnetic separation system for magnetic separation, magnetic concentrate enters a high-efficiency sedimentation tank for concentration, concentrated bottom flow enters a flotation system, a coarse-four-fine two-sweep process flow is adopted for flotation, and a flotation tank 10 is adopted for flotation equipment.

Example 5:

The concentrated magnetic concentrate ore pulp is fed into a flotation tank 10 by a slurry pump at a feed pressure of 0.1MPa, the number of separating pipes 21 is 6, the pipe diameter is DN100mm, middlings at the bottom of the tank body are discharged by a middling discharge port 11, pressurized to 0.3MPa by a second slurry pump, sequentially conveyed to a mineralization assembly 40 and a spraying assembly 50 by a middling feed pipe 31 and a middling ring pipe 32, the air supply pressure of compressed air is 0.45MPa, the number of microbubble bubble generators 41 is 16, the bubble generation aperture is 0.1mm, the number of spray heads 52 is 16, the spray direction is obliquely upwards sprayed, the included angle between the spray nozzles and the horizontal included angle is 15 degrees, and the caliber of the spray nozzles is 30mm. The slurry passing through the flotation cell 10 was subjected to a one-time rougher, four-time beneficiation, and two-time scavenger flotation process to obtain the following indicators in table 7:

The flotation process flow gave the following indices in table 7:

TABLE 7 example 5 iron tailings fines fraction titanium extraction results (%)

From table 7, the tailings after iron separation enter a magnetic separation system for magnetic separation, and the content of TiO2 in the tailings after the magnetic separation by flotation is 14.71%, the content of TiO2 in the tailings after the magnetic separation is 46.35%, the yield is 24.23% and the recovery rate of TiO2 is 76.35%. The high-efficiency recovery of ilmenite is realized through 'microbubble mineralization and high-frequency concentration', and the grade of concentrate reaches the industrial grade standard.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present invention, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A transmission-free flotation device, comprising: The flotation tank has a middling discharge port at the bottom; A material distribution component is provided through the flotation tank and is in communication with the flotation tank; A middling ore circulation component, connected to the middling ore discharge port; a mineralization component, connected to the intermediate ore circulation component; an injection assembly, connected to the mineralization assembly and the flotation tank, and located below the material distribution assembly; an underflow discharge pipe, connected to the flotation tank and located between the injection assembly and the middling ore discharge port, wherein the diameter of the underflow discharge pipe is smaller than the diameter of the middling ore discharge port; The foam discharging component is located at the top of the flotation tank and penetrates the flotation tank to be communicated with the flotation tank. 2. The transmission-free flotation device according to claim 1, wherein the flotation cell comprises: trough body; A container body is connected to the trough body to form a container cavity, the bottom of the container body is provided with the intermediate ore discharge port, and the side of the container body is connected to the bottom flow discharge pipe; The material distribution component is provided through the trough body and communicates with the accommodating cavity, and the cross-sectional area of the accommodating body gradually decreases along the direction of the material distribution component toward the intermediate ore discharge port. 3. The transmission-free flotation device according to claim 1, wherein the material distribution component comprises: A plurality of material distribution pipes are arranged in the flotation tank; A feed pipe is provided through the flotation tank and is connected to the plurality of distribution pipes; Wherein, a plurality of the distribution pipes are arranged at equal angles and evenly spaced around the circumference of the feed pipe. 4. The transmission-free flotation device according to any one of claims 1 to 3, wherein the middling ore circulation component comprises: A middling feed pipe is located outside the flotation tank and is connected to the middling discharge port; The middling ring pipe is located outside the flotation tank and is communicated with the middling discharge pipe. The middling ring pipe is arranged outside the flotation tank and is communicated with the mineralization component. 5. The transmission-free flotation device according to claim 4, wherein the mineralization component comprises: A plurality of microbubble generators are located outside the flotation tank and are in communication with the middling ring pipe and the injection assembly; a plurality of compressed air hoses corresponding to the plurality of microbubble bubble generators, the compressed air hoses being in communication with the corresponding microbubble bubble generators; a compressed air ring pipe, connected to the plurality of compressed air hoses; The first control valve is provided on the compressed air hose. 6. The transmission-free flotation device according to claim 5, wherein the injection assembly comprises: A plurality of mineralization tubes are provided in the flotation tank and correspond one to one with the plurality of microbubble generators, wherein the mineralization tubes are in communication with the corresponding microbubble generators; A plurality of nozzles are arranged in the flotation tank and correspond one-to-one to the plurality of mineralization pipes, and the nozzles are communicated with the corresponding mineralization pipes. 7. The transmission-free flotation device according to claim 6, characterized in that the spraying direction of the nozzle is toward the material distribution component, and the angle with the horizontal plane is 30°~60°. 8 . The transmission-free flotation device according to claim 6 , wherein the diameter of the mineralization tube is smaller than the diameter of the mid-ore ring tube. 9. The transmission-free flotation device according to any one of claims 1 to 3, wherein the foam discharging assembly comprises: a foam chute, disposed in the flotation tank and located at the top of the flotation tank; A foam pipe is provided through the flotation tank and communicated with the foam chute. 10. The transmission-free flotation device according to any one of claims 1 to 3, wherein the underflow discharge pipe is provided with a second control valve, and the transmission-free flotation device further comprises: A float ball is arranged in the flotation tank; a detector, disposed outside the flotation tank and opposite to the float, for detecting the height of the float; A controller is electrically connected to the second control valve and the detector.