CN203862407U - Flotation column - Google Patents

Abstract

The utility model relates to the technical field of chemical industry, in particular to a flotation column, which includes an iron cylinder, and the middle and upper sections of the cylinder are sequentially provided with a pulp feeding pipe and a tailings discharge pipe communicating with the cylinder chamber from top to bottom. 1. The chemical feeding pipe connected to the output end of the bubble generator, the lower end of the cylinder body is the concentrate outlet, and the outer peripheral wall of the middle and lower section of the cylinder body is covered with an electromagnetic coil assembly connected to the power supply. The reverse flotation of lean iron ore can be carried out through the above-mentioned flotation column, that is, the floating tailings are discharged from the middle and upper sections of the cylinder, and the last remaining fine iron ore is discharged from the lower end of the cylinder, and the middle and lower sections of the cylinder are discharged. The electromagnetic coil assembly is set on the outer peripheral wall. After the electromagnetic coil assembly is energized, it can generate a strong magnetic field strength, so that under the action of magnetic force, it can promote the fine iron ore in the slurry to move to the bottom of the cylinder, and finally break away from the force of the magnetic field and under the influence of gravity. Under the action, it is discharged from the outlet of the concentrated ore. The utility model has a simple structure and high flotation rate of the concentrated iron ore in the lean iron ore.

Description

Flotation column

technical field

The utility model relates to the technical field of chemical industry, in particular to a flotation method of lean iron ore and the

Background technique

Concentrated iron ore is one of the products of separation in ore beneficiation. It can be obtained by flotation of coarse ore. There are many kinds of flotation machines used for flotation of iron ore, and flotation column is a relatively common precipitation type. Flotation equipment, the flotation method of flotation column is divided into positive flotation and reverse flotation. The so-called positive flotation is to flotation the target product concentrate. The chemical solution and compressed air in the bubble generator are pumped into the flotation column, and then the slurry made of coarse iron ore and water is added from the upper part of the cylinder for mixing and stirring, so that the concentrate ore particles in the slurry are selectively Attached to the air bubbles, it finally floats to be discharged from the upper outlet of the cylinder, while the tailings (that is, gangue minerals or impurity minerals) remain in the slurry and are finally discharged from the bottom of the cylinder. The defect of above-mentioned existing technology is: along with the rapid development of iron and steel industry, the development and utilization of lean iron ore resources are more and more paid close attention to by people, but the flotation column of the flotation concentrate iron ore that appears on the market in recent years is mostly Positive flotation is used, and positive flotation is only suitable for ores with high iron content. For lean iron ores and tailings with low iron content, positive flotation not only requires multiple flotation, but also concentrates The yield is very low and the flotation effect is poor.

Contents of the invention

The purpose of the utility model is to provide a flotation column which can effectively improve the flotation rate of lean iron ore and iron concentrate in tailings.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a flotation column, which is characterized in that: it includes an iron cylinder, and the middle and upper sections of the cylinder are sequentially provided with pulp inlets connected with the cylinder cavity from top to bottom. Material pipe, tailings discharge pipe, chemical feed pipe connected to the output end of the bubble generator, the lower end of the cylinder is the concentrate outlet, and the outer peripheral wall of the middle and lower section of the cylinder is sleeved with an electromagnetic coil assembly connected to the power supply.

The beneficial effect of adopting the above-mentioned technical scheme is that: during the flotation of lean iron ore, the reverse flotation of lean iron ore can be carried out through the above-mentioned flotation column, that is, the floating tailings are discharged from the middle and upper sections of the cylinder, The last remaining fine iron ore is discharged from the lower end of the cylinder. The utility model sets an electromagnetic coil assembly on the outer peripheral wall of the middle and lower section of the cylinder. It can promote the iron ore concentrate in the slurry to move to the bottom of the cylinder, and finally break away from the force of the magnetic field and be discharged from the concentrate outlet under the action of gravity. The utility model has the advantages of simple structure and high flotation rate of fine iron ore in lean iron ore.

Description of drawings

Fig. 1 is the three-dimensional schematic view of the utility model;

Fig. 2 is a structural representation of the utility model;

Fig. 3 is a sectional view taken along line A-A of Fig. 1 .

Detailed ways

A kind of flotation column, as shown in Fig. 1-3, it comprises iron cylinder body 10, and the middle and upper part of described cylinder body 10 is provided with ore slurry feed pipe 11, tailing that communicates with cylinder chamber successively from top to bottom. The ore discharge pipe 13, the medicine feeding pipe 14 connected to the output end of the bubble generator, the lower end of the cylinder body is the concentrate outlet 15, and the outer peripheral wall of the middle and lower section of the cylinder body 10 is sleeved with an electromagnetic coil assembly 20 connected to the power supply. When carrying out the flotation of lean iron ore, the reverse flotation of lean iron ore can be carried out through the flotation column disclosed by the utility model, that is to say, the floating object is tailings through the flotation reagent, and the tailings obtained in this way And discharged from the middle and upper section of the cylinder 10, the last remaining fine iron ore is discharged from the concentrate outlet 15 at the lower end of the cylinder 10. The electromagnetic coil assembly 20 connected to the power supply is sleeved, and the electromagnetic coil assembly 20 can generate a strong magnetic field strength after being energized, so that under the action of magnetic force, the fine iron ore in the ore pulp can be promoted to move to the bottom of the cylinder 10, and finally the fine iron ore The ore breaks away from the force of the magnetic field and is discharged from the concentrate outlet 15 under the action of gravity. The recovery rate of the lean iron ore flotation of the utility model is high, and the supply of the concentrate iron ore to the iron and steel industry is effectively increased.

As a further preferred solution: as shown in Figure 1-2, the cylinder 10 includes a straight cylinder section 16 and a conical cylinder section 17 arranged concentrically, and the large diameter end of the cone cylinder section 17 is anastomosedly connected with the lower end of the straight cylinder section 16, The small-diameter end of the cone section 17 is located at the lower end of the cylinder body 10 , and the electromagnetic coil assembly 20 is sleeved on the outer peripheral surface of the cone section 17 . The utility model sets the middle and lower sections of the cylinder body 10 into a cone shape, so that the iron ore concentrate can collide with the inner wall of the cone section 17 under the action of magnetic force and gradually move downward until it is discharged from the concentrate outlet 15, effectively improving The purity of iron ore flotation.

Further, the medicament feeding tube 14 is located on the side wall of the junction of the straight section 16 and the conical section 17 of the cylinder 10, and the medicament feeding tube 14 is arranged along the tangential direction of the side wall of the cylinder 10, as shown in the figure As shown in 1 and 3, medicine and compressed air are injected into the cylinder 10 along the tangential direction, so that the medicine mixture can swirl in the cylinder 10 to form dispersed bubbles, which greatly improves the flotation effect of lean iron ore.

When the utility model is actually used, because the medicament mixture produces a swirling flow in the cylinder 10, the tailings gradually move closer to the axis of the cylinder 10 during the process of floating up. In order to facilitate the discharge of the tailings, as shown in Figure 2 As shown, the tailings discharge pipe 13 is an elbow composed of a vertical pipe at the lower part and a horizontal pipe at the upper part. The vertical pipe is arranged concentrically with the cylinder body 10 and the mouth of the vertical pipe is downward. It can be ensured that the tailings at the shaft core of the cylinder body 10 can be effectively and intensively discharged.

Further, the cylinder body 10 is provided with an overflow discharge pipe 12 communicating with the cylinder cavity, the overflow discharge pipe 12 is at the same height as the slurry feed pipe 11 and is relatively arranged at the upper side wall of the cylinder body 10, Through the arrangement of the overflow discharge pipe 12, when there are too many air bubbles in the cylinder body 10, the floating materials can be discharged through the overflow discharge pipe 12. The tailings discharged by the ore discharge pipe 13, preferably, the overflow discharge pipe 12 communicates with the pulp feed pipe 11 through a connecting pipe, and a check valve is arranged on the connecting pipe, and the opening of the check valve conducts The direction is from the overflow discharge pipe 12 to the direction of the slurry feed pipe 11. Through the arrangement of the connecting pipe and the one-way valve, the material discharged from the overflow discharge pipe 12 can be recovered and then floated, thereby improving the concentration of iron concentrate. Recovery rate.

Claims (6)

1. a kind of flotation column, it is characterized in that: comprise ferrous cylinder body (10), the middle and upper part of described cylinder body (10) is provided with the ore slurry feed pipe (11) that communicates with cylinder chamber successively from top to bottom ), the tailings discharge pipe (13), the medicament feed pipe (14) connected to the output end of the bubble generator, the lower end of the cylinder body is the concentrate outlet (15), and the outer peripheral wall of the middle and lower section of the cylinder body (10) is covered An electromagnetic coil assembly (20) connected to a power source is provided. 2. The flotation column according to claim 1, characterized in that: the cylinder body (10) comprises a straight cylinder section (16) and a conical cylinder section (17) concentrically arranged, the large diameter of the cone cylinder section (17) The diameter end is anastomosedly connected with the lower end of the straight cylinder section (16), the small diameter end of the cone cylinder section (17) is located at the lower end of the cylinder body (10), and the electromagnetic coil assembly (20) is sleeved on the cone cylinder section (17) on the outer peripheral surface. 3. The flotation column according to claim 2, characterized in that: the reagent feed pipe (14) is located on the side of the junction of the straight section (16) and the conical section (17) of the cylinder (10) On the wall, and the medicament feed pipe (14) is arranged along the tangential direction of the side wall of the cylinder body (10). 4. The flotation column according to claim 1, 2 or 3, characterized in that: the tailings discharge pipe (13) is a bend formed by two parts: a vertical pipe at the bottom and a horizontal pipe at the top. tube, the standpipe is arranged concentrically with the cylinder body (10) and the mouth of the standpipe is downward. 5. The flotation column according to claim 4, characterized in that: the cylinder body (10) is provided with an overflow discharge pipe (12) communicated with the cylinder cavity, and the overflow discharge pipe (12) is connected to the The pulp feeding pipe (11) is of equal height and relatively arranged at the upper end side wall of the cylinder body (10). 6. The flotation column according to claim 5, characterized in that: the overflow discharge pipe (12) communicates with the pulp feed pipe (11) through a connecting pipe, and the connecting pipe is provided with a one-way valve, The opening and conduction direction of the one-way valve is the direction from the overflow discharge pipe (12) to the slurry feed pipe (11).