CN117816361A - A combined beneficiation method for low-grade, high-mud content, fine-grained tin tailings - Google Patents
A combined beneficiation method for low-grade, high-mud content, fine-grained tin tailings Download PDFInfo
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- CN117816361A CN117816361A CN202410058924.0A CN202410058924A CN117816361A CN 117816361 A CN117816361 A CN 117816361A CN 202410058924 A CN202410058924 A CN 202410058924A CN 117816361 A CN117816361 A CN 117816361A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
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Abstract
本发明公开一种低品位高泥量细粒锡尾矿组合选矿方法，包括以下步骤：（1）重选预富集：将‑0.074mm的原矿调浆，然后将所得矿浆用悬振选矿机进行一次粗选预富集，得到预富集产品；（2）脱硫浮选：将所述预富集产品进行浓缩脱水，预富集产品若含硫，则进行脱硫浮选，所述脱硫浮选包括粗选、扫选和精选；预富集产品若不含硫，则直接进入步骤（3）；（3）锡石浮选：将步骤（2）中不含硫的预富集产品或脱硫后的产品进行锡石浮选，所述锡石浮选包括粗选、扫选和精选；（4）重选：将步骤（3）锡石浮选中最后精选的产品用重选设备进行分选，得到高品位锡精矿和低品位锡精矿。本发明具有可降低成本，提升选矿回收率及产品品质的优点。
The present invention discloses a combined beneficiation method for low-grade, high-mud fine-grained tin tailings, comprising the following steps: (1) gravity pre-enrichment: pulping the 0.074 mm raw ore, and then using a suspended vibration concentrator to perform a roughing pre-enrichment on the obtained slurry to obtain a pre-enriched product; (2) desulfurization flotation: concentrating and dehydrating the pre-enriched product, if the pre-enriched product contains sulfur, desulfurization flotation is performed, and the desulfurization flotation includes roughing, scavenging and concentrating; if the pre-enriched product does not contain sulfur, it directly enters step (3); (3) cassiterite flotation: the pre-enriched product or the desulfurized product that does not contain sulfur in step (2) is subjected to cassiterite flotation, and the cassiterite flotation includes roughing, scavenging and concentrating; (4) gravity separation: the last selected product in the cassiterite flotation of step (3) is sorted by gravity separation equipment to obtain a high-grade tin concentrate and a low-grade tin concentrate. The present invention has the advantages of reducing costs, improving mineral processing recovery rate and product quality.
Description
Technical Field
The invention belongs to the field of fine tin resource recovery, and particularly relates to a low-grade high-mud-amount fine tin tailing combined beneficiation method.
Background
Cassiterite is brittle and easy to mud, and is easy to be crushed in the process of crushing and grinding, so that a large amount of fine cassiterite is produced. The fine-grained cassiterite is subjected to mineral separation by a traditional shaking table, so that the fine-grained cassiterite is difficult to effectively recycle and is discharged into tailings. Usually, the tailings have finer granularity, secondary slime can be generated after raw ores are ground, and part of primary slime is added, so that the slime can finally enter the tailings, and the high mud content is also a great characteristic of resources of the tin tailings. The low grade, the fine granularity and the high mud content are main factors which cause the low recovery rate and the high treatment cost of the tin tailings, and the economic and efficient development and utilization of the tin tailings become a great difficulty in the mineral separation technology.
Aiming at the main concentrating process of the tin tailings, the shaking table gravity concentration and the flotation are adopted, the lower limit of the recycling granularity of the traditional shaking table is +0.038mm, and for the fine mud tailings with the granularity of-0.038 mm, the shaking table gravity concentration recycling efficiency is very limited, the treatment capacity is small, and the industrialization application is difficult to realize; by adopting a single flotation process, the fine mud has great influence on the process, so that the medicament consumption is high, the cost is high, the quality of concentrate products is not high, and the economic benefit cannot be ensured. The process for recovering the fine-particle-grade cassiterite is found to have the following patent:
1. patent application number: 201510011445.4, name of invention: the method for pre-pulping and classifying the reselected raw ore and the application thereof, wherein the fine-particle-grade ore slurry enters the flotation as overflow, and the flotation stage comprises the following steps: (3.1) carrying out magnetic separation on overflow to obtain a magnetic product and a non-magnetic product, and recycling the obtained magnetic product for later use; (3.2) concentrating the non-magnetic product after magnetic separation; (3.3) sulfur floatation of the concentrated product; the sulfur flotation includes at least two beneficiations and at least three sweeps; wherein the concentrated overflow water is recycled; obtaining sulfur concentrate after concentration; (3.4) carrying out cassiterite flotation roughing on the product subjected to the scavenging in the step (3.3) through a pharmaceutical composition; (3.5) respectively carrying out carefully choosing and scavenging on the products after the rough concentration of the cassiterite flotation; (3.5) respectively carrying out at least four times of fine selection and at least three times of scavenging on the product after the rough flotation of the cassiterite; (3.6) feeding the product after the concentration in the step (3.5) into recovery equipment and obtaining tin concentrate; (3.7) obtaining tailings from the products subjected to at least three times of scavenging, wherein the recovery equipment adopts a rapid fine mud shaking table, a suspension vibration cone concentrating machine or centrifugal equipment. The patent adopts a process flow of combining floating weight to treat the slime with micro-fine particle level, and flotation needs to be subjected to one roughing, at least four fine selection and at least three scavenging, so that the medicament consumption is high and the cost is high. The same problem can also be seen in a gravity tailings cassiterite flotation process of patent application No. 201510011492.9.
2. Patent application number: 202310224711.6, name of invention: the polymetallic sand-tin ore dressing process adopts the equal floatable-mixed floatation-gravity separation backwater flow: tin concentrate yield 0.39%, tin 40.57%, tin recovery 51.66%; the yield of low-grade tin concentrate is 0.51%, the tin content is 3.17%, and the tin recovery rate is 5.28%. The patent is mainly characterized in that the equal floatable-mixed floatation process treatment is carried out, for the fine-size-0.038 mm material, the simple treatment is carried out by adopting a method of carrying out reselection by adopting a single-time suspension vibration disc concentrating machine and a single-time shaking table reselection, the lower limit of the traditional shaking table recovery granularity is +0.038mm, for the fine-size-0.038 mm tailings, the shaking table reselection recovery efficiency is very limited, and finally, the grade of tin concentrate recovered by the fine-size tailings is only 1.73%.
At present, an economic and efficient beneficiation process for recycling the low-grade fine tin tailings with high mud content is lacking.
Disclosure of Invention
The invention aims to solve the technical problems, and provides the low-grade high-mud-amount fine-particle tin tailing combined beneficiation method which can reduce the cost, improve the beneficiation recovery rate and the product quality and effectively recover the fine-particle tin tailings.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a combined beneficiation method for low-grade high-mud-amount fine tin tailings comprises the following steps:
(1) Reselection pre-enrichment: pulping raw ore with the grain size of-0.074 mm, and then carrying out primary roughing pre-enrichment on the obtained ore pulp by using a suspension vibration concentrating machine to obtain a pre-enriched product;
(2) Desulfurizing and floatation: concentrating and dehydrating the pre-enriched product, and if the pre-enriched product contains sulfur, performing desulfurization flotation, wherein the desulfurization flotation comprises roughing, scavenging and selecting; if the pre-enriched product does not contain sulfur, directly entering the step (3);
(3) Cassiterite flotation: carrying out cassiterite flotation on the sulfur-free pre-enriched product or the desulfurized product in the step (2), wherein the cassiterite flotation comprises roughing, scavenging and selecting;
(4) And (3) reselection: and (3) sorting the finally-selected products in the cassiterite flotation in the step (3) by using a gravity separation device to obtain high-grade tin concentrate and low-grade tin concentrate.
As a further technical scheme, in the raw ore, the grade of tin is not more than 0.5%, and the distribution rate of tin in the size fraction of-0.037 mm is more than that in the size fraction of +0.037mm-0.074 mm.
As a further technical scheme, the distribution rate of tin in the raw ore is not lower than 50% in the size fraction of-0.037 mm.
As a further technical scheme, the roughing conditions of the suspension vibration concentrating machine are as follows: the weight concentration of the ore is 10-25%, the washing water quantity is 10-23 ml/s, the rotation frequency is 15-30 Hz, and the vibration frequency is 25-30 Hz.
As a further technical scheme, the desulfurization flotation comprises one roughing, one scavenging and one refining, and any one or more than two of a collector, an activator and a foaming agent are added in the desulfurization flotation.
As a further technical scheme, in the desulfurization flotation step, 25-50 g/t.raw ore of collecting agent, 15-60 g/t.raw ore of activating agent and 10-20 g/t.raw ore of foaming agent are added in the primary roughing; collecting agent 5-30 g/t.raw ore is added in one-time scavenging; collecting agent 0-5 g/t.raw ore is added in the primary concentration.
As a further technical scheme, the cassiterite flotation comprises one roughing, two scavenging and at least two refining, and any one or more than two of a collector, an activator and a foaming agent are added in the cassiterite flotation.
As a further technical scheme, in the cassiterite flotation step, 450-600 g/t.raw ore of collecting agent, 80-150 g/t.raw ore of activating agent and 10-30 g/t.raw ore of foaming agent are added in the primary roughing; in the two-time scavenging, 100-300 g/t of collecting agent and 5-20 g/t of foaming agent are added in each scavenging process; in the at least two carefully selecting, 0-100 g/t of collecting agent is added in each carefully selecting, and 5-10 g/t of foaming agent is also added in the first carefully selecting.
As a further technical scheme, the collecting agent is any one of butyl xanthate, benzohydroxamic acid and BY 9; the activating agent is copper sulfate or lead nitrate; the foaming agent is No. 2 oil.
As a further technical scheme, the gravity separation device in the step (4) comprises a suspension vibration concentrating machine, a centrifugal concentrating machine or a high-frequency shaking table.
The No. 2 oil and BY9 are conventional commercial products for mineral separation, and the No. 2 oil is also called pinitol oil; BY9 contains salicylic hydroxamic acid as the main ingredient.
Compared with the prior art, the invention has the beneficial effects that:
1. the combined beneficiation method can reduce cost and can realize effective recovery of fine-fraction tin tailings. According to the invention, the fine-grained tin tailings with the tin grade not more than 0.5% and 0.074mm are treated by adopting a combined beneficiation method of heavy-floating-heavy, compared with the process of floating-heavy, the dosage of medicaments is reduced by more than 60%, and meanwhile, the grade of the recovered high-tin concentrate reaches more than 41%, and the recovery rate is more than 34%; the grade of the low-tin concentrate is more than 2.3 percent, and the recovery rate is more than 25 percent; good indexes of the recovery rate of the comprehensive tin of more than 60 percent are achieved; further, for the fine-fraction tin tailings with the distribution rate of no less than 75 percent and the size of-0.037 mm which are more difficult to treat, the process reduces the dosage of the medicament and simultaneously realizes that the grade of the recovered high-tin concentrate reaches more than 38 percent and the recovery rate is more than 12 percent; the grade of the low-tin concentrate is more than 2.3 percent, and the recovery rate is more than 17 percent; good indexes of the comprehensive tin recovery rate of more than 30 percent are achieved; the obtained products reach sales grade, and the recycling recovery of the fine tin tailings with low grade and high mud content is realized.
2. In the gravity-floating-gravity combined beneficiation method, the suspension vibration concentrator is adopted as a gravity concentration pre-enrichment means in the first step of gravity concentration, so that the raw ore is not required to be subjected to pre-desliming, the direct full-quantity concentration is realized, the loss of micro-fine cassiterite is reduced, more than 60% of gangue and fine mud can be thrown out, the flotation feeding grade is improved, the influence of the micro-fine mud on the subsequent operation is greatly reduced, the dosage of the reagent is reduced, and the beneficiation cost is reduced; according to the cassiterite flotation method, finer cassiterite can be recovered through the combination of 'one roughing, two scavenging and at least two concentration' and the addition of a set reagent, so that the grade of tin concentrate is improved, the recovery rate of cassiterite is improved, and the tin resource waste is reduced; the tin middlings obtained after cassiterite flotation are re-separated by a re-separating device (such as a high-frequency shaking table), so that high-grade tin concentrate and low-grade tin concentrate of sales grade can be obtained, the product structure is optimized, and the economic benefit is increased.
Drawings
FIG. 1 is a flow chart of a method for combined beneficiation of low-grade high-mud-content fine-grained tin tailings.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited to the scope indicated by the examples.
Example 1
The raw ore treated in this example is a fine fraction of a low-grade high-mud-content tin tailings separated into coarse fractions, the tin grade is 0.34%, the granularity is-0.074 mm, and the raw ore contains a part of pyrite, the multi-element analysis result (%) of the raw ore is shown in table 1, and the granularity analysis result (%) is shown in table 2.
TABLE 1 Multi-element analysis results of raw ore (%)
| Element(s) | Sn | Pb | Zn | S | As | Cu | Fe | SiO 2 | CaO |
| Content of | 0.34 | 0.01 | 0.11 | 1.63 | 0.015 | 0.02 | 6.58 | 60.05 | 0.11 |
TABLE 2 raw ore particle size analysis results (%)
The crude ore is fine mud obtained by separating coarse tailings discharged after the traditional shaking table is selected, and as can be seen from Table 2, tin metal is mainly distributed in the size fraction of-0.037 mm, and when the shaking table is adopted for the secondary selection, the recovery efficiency is very limited, the effect is poor, and the economic benefit cannot be generated.
The main technical process of the invention is the process of heavy-floating-heavy: the method comprises the steps of carrying out primary roughing on raw ore pulp by adopting a suspension vibration concentrating machine, carrying out one-roughing one-scavenging one-refining desulfurization flotation on the obtained rough concentrate, carrying out one-roughing two-scavenging two-refining cassiterite flotation on desulfurization flotation tailings, obtaining tin middlings, and carrying out concentration by adopting a high-frequency table to produce high-grade tin concentrate and low-grade tin concentrate. The main technical conditions are as follows:
(1) Raw ore pulp is directly fed into a suspension vibration ore separator for roughing without desliming, and roughing parameters are as follows: the mineral feed mass concentration is 20%, the washing water quantity is 18ml/s, the rotation frequency is 24Hz, and the vibration frequency is 28Hz.
(2) Desulfurization flotation reagent system: roughing time is 3min, butyl xanthate is 33 g/t.raw ore, copper sulfate is 20 g/t.raw ore, and No. 2 oil is 10 g/t.raw ore; scavenging time is 1.5min, butyl xanthate is 10 g/t.raw ore; the concentration time is 2min, and the butyl xanthate is 3 g/t.raw ore.
(3) Cassiterite flotation reagent system: roughing time is 5min, and the raw ore is 495 g/t.of benzohydroxamic acid, 132 g/t.of lead nitrate and 13 g/t.of No. 2 oil; scavenging for 3min, namely 165 g/t.raw ore of benzohydroxamic acid and 13 g/t.raw ore of No. 2 oil; scavenging II for 2min, wherein the time for scavenging II is 100 g/t.raw ore of the benzohydroxamic acid; selecting raw ore of which the time is 6min and of which the concentration is 65 g/t.of the benzohydroxamic acid and 10 g/t.of the No. 2 oil; the time for selecting II is 4.5min, and the concentration of the benzohydroxamic acid is 50 g/t.raw ore.
(4) The high-frequency shaking table gives mineral mass concentration of 15% and stroke of 8mm.
Comparative example 1:
in the same crude ore as in example 1, comparative example 1 uses a "float-heavy" process to recover the raw material, the main process flow being: the raw materials are firstly subjected to one-coarse one-sweep one-fine desulfurization flotation, the desulfurization flotation tailings are subjected to one-coarse two-sweep two-fine cassiterite flotation, and after the tin middlings are obtained, the sales-grade tin concentrate is produced by adopting a shaking table for concentration. The main technical conditions are as follows:
(1) The raw ore is directly fed into flotation without desliming, and the flotation concentration is 35%.
(2) Desulfurization flotation reagent system: roughing time is 3.5min, butyl xanthate is 100 g/t.raw ore, copper sulfate is 60 g/t.raw ore, and No. 2 oil is 30 g/t.raw ore; scavenging time is 1.5min, butyl xanthate is 20 g/t.raw ore; the concentration time is 1.5min,10 g/t.raw ore.
(3) Cassiterite flotation reagent system: roughing time is 5min, the raw ore of the benzohydroxamic acid is 1800g/t, the raw ore of the lead nitrate is 400g/t, and the raw ore of the No. 2 oil is 40 g/t; scavenging for 3min, wherein the time for scavenging I is 500 g/t.raw ore of benzohydroxamic acid and 10 g/t.raw ore of No. 2 oil; scavenging II for 2.5min, wherein the time for scavenging II is 300 g/t.of raw ore of the benzohydroxamic acid; selecting raw ore of 200 g/t.of benzoic hydroxamic acid and 10 g/t.of No. 2 oil for 5 min; the time for selecting II is 4.5min, and the concentration of the benzohydroxamic acid is 200 g/t.raw ore.
(4) Sorting by a high-frequency shaking table: the weight concentration of the ore feed is 15 percent and the stroke is 12mm.
Example 2:
the raw ore treated in this example was a cassiterite flotation desliming overflow, tin grade was 0.097%, particle size-0.037 mm was 85.56%, and a multi-element analysis result (%) of the raw ore containing a part of pyrite was shown in table 3, and particle size analysis result (%) was shown in table 4.
TABLE 3 Multi-element analysis results of raw ore (%)
| Element(s) | Sn | Pb | Zn | S | As | Fe | SiO 2 | CaO |
| Content of | 0.097 | 0.12 | 0.15 | 3.02 | 0.21 | 7.26 | 51.22 | 1.38 |
TABLE 4 raw ore particle size analysis results (%)
The raw materials are overflows which enter cassiterite flotation and need desliming and discharge, the granularity is extremely fine, the mud is serious, the cassiterite in the raw materials is recovered by adopting a single flotation mode, a great amount of cost is consumed, and economic benefits cannot be generated.
The main technical process of the invention is the process of heavy-floating-heavy: the method comprises the steps of carrying out primary roughing on raw ore pulp by adopting a suspension vibration concentrating machine, carrying out one-roughing one-scavenging one-refining desulfurization flotation on the obtained rough concentrate, carrying out one-roughing two-scavenging three-refining cassiterite flotation on desulfurization flotation tailings, obtaining tin middlings, and carrying out concentration by adopting a high-frequency shaking table to produce high-grade tin concentrate and low-grade tin concentrate. The main technical conditions are as follows:
(1) Raw ore pulp is directly fed into a suspension vibration ore separator for roughing without desliming, and roughing parameters are as follows: 15% of ore feeding concentration, 13ml/s of washing water quantity, 25Hz of rotation frequency and 25Hz of vibration frequency.
(2) Desulfurization flotation reagent system: roughing time is 4min, the xanthate is 50 g/t.raw ore, the copper sulfate is 50 g/t.raw ore, and the No. 2 oil is 15 g/t.raw ore; scavenging for 2min, wherein the yellow medicine is 25 g/t.raw ore; the selection time is 3.5min, and no medicament is added.
(3) Cassiterite flotation reagent system: roughing time is 6min, BY9500 g/t.raw ore, lead nitrate 120 g/t.raw ore and No. 2 oil 15 g/t.raw ore; scavenging time I is 3min, BY9180 g/t.raw ore, and 10 g/t.raw ore of No. 2 oil; scavenging II, namely, time is 2min, and BY9100/t is the raw ore; selecting 5min of time I, 5g/t of raw ore of BY990g/t of raw ore of No. 2 oil; selecting raw ore with the time of II of 4min, selecting raw ore with the time of III of 3.5min, and selecting raw ore with the time of BY950 g/t.
(4) The feeding concentration of the high-frequency shaking table is 15%, and the stroke is 8mm.
Example 3:
the crude ore treated in the embodiment is a certain tin tailing, the tin grade is 0.31%, wherein iron and tin are densely symbiotic, and the crude ore is required to be ground to be 0.037mm.
TABLE 5 Multi-element analysis results of raw ore (%)
| Element(s) | Sn | Pb | Fe | Al 2 O 3 | SiO 2 | CaO | MgO |
| Content of | 0.31 | 0.25 | 13.75 | 12.31 | 12.12 | 15.16 | 5.37 |
TABLE 6 raw ore grinding to-0.037 mm particle size analysis results (%)
The raw ore is tailings discharged after the traditional shaking table is selected, and because iron and tin are densely symbiotic, grinding to-0.037 mm is needed to enable cassiterite monomers to be dissociated.
The main technical process of the invention is the process of heavy-floating-heavy: the crude ore pulp is subjected to primary roughing by adopting a suspension vibration concentrating machine, the obtained rough concentrate is subjected to one-rough two-sweeping two-fine cassiterite flotation, and after the tin middling is obtained, a high-frequency shaking table is adopted for concentration to produce high-grade tin concentrate and low-grade tin concentrate. The main technical conditions are as follows:
(1) Raw ore is directly fed into a suspension vibration ore separator for roughing without desliming, and roughing parameters are as follows: the ore feeding concentration is 20%, the washing water quantity is 20ml/s, the rotation frequency is 22Hz, and the vibration frequency is 30Hz.
(2) Cassiterite flotation reagent system: roughing time is 5min, the raw ore of the benzohydroxamic acid is 600g/t, the raw ore of the lead nitrate is 120g/t, and the raw ore of the No. 2 oil is 30 g/t; scavenging for 3min, wherein the time for scavenging I is 240 g/t.raw ore of benzohydroxamic acid and 10 g/t.raw ore of No. 2 oil; scavenging II for 2min, wherein the time for scavenging II is 120 g/t.raw ore of the benzohydroxamic acid; selecting 80 g/t.raw ore of the benzohydroxamic acid and 10 g/t.raw ore of the No. 2 oil for 5 min; and (3) selecting the II time for 4min, wherein the concentration of the benzoic hydroxamic acid is 50 g/t.raw ore.
(3) The feeding concentration of the high-frequency shaking table is 18 percent, and the stroke is 10mm.
Comparative example 2
Under the same raw ore as in example 3, the traditional shaking table is adopted for sorting, and the main technical conditions are as follows: the raw ore pulp is directly sorted by adopting a mineral mud shaking table, the ore feeding concentration is 20%, the stroke is 10mm, the flushing frequency is 465r/min, and the bed surface gradient is 4 degrees.
The tin recovery cases of examples 1 to 3 and comparative examples 1 to 2 are shown in table 7:
TABLE 7
As can be seen from table 7:
(1) In the embodiment 1 of the invention, when the tin tailings with the granularity of-0.074 mm are treated, the tin concentrate grade is 41.53 percent, and the recovery rate is 34.90 percent; the grade of the low-tin concentrate is 2.38%, and the recovery rate is 25.47%; the comprehensive tin recovery rate is 60.37%, the dosage of the medicament is reduced by more than 60% compared with the direct crude ore flotation of the comparative example 1, and the comprehensive tin recovery rate of the comparative example 1 is only 35.32%, which is far lower than the tin recovery rate of the invention.
(2) Aiming at the overflow removal, the traditional process cannot effectively recover, and the invention can obtain the grade of tin concentrate of 38.92 percent and the recovery rate of 12.43 percent; the grade of the low-tin concentrate is 3.02%, and the recovery rate is 17.83%; good index of 30.26% of comprehensive tin recovery rate.
(3) In the embodiment 3 of the invention, when tin tailings with the tin grade of 0.31% and compact symbiotic iron and tin are treated, the tin concentrate grade of 43.33% is obtained, and the recovery rate is 40.78%; the grade of the low-tin concentrate is 3.15%, the recovery rate is 26.34%, and the comprehensive tin recovery rate is 67.12% as a good index; when the traditional shaking table separation process is adopted in the comparative example 2, the grade of tin concentrate is 25.89%, the recovery rate is 39.26%, and the recovery rate is lower.
Therefore, compared with comparative examples 1 and 2, the combined beneficiation process of heavy-concentration-heavy can realize the efficient and economical recovery of the low-grade high-mud-content tin tailings, and provides a new idea for reutilization of the tin tailings.
In the field of mineral separation industry, roughing refers to separating earth, impurities, gangue and the like on raw ore by one-time mineral separation, thereby obtaining a concentrate product higher than the raw ore, called rough concentrate. The fine powder grade is not generally met, and the process is called roughing operation. Scavenging, meaning that the roughed tailings cannot be defined as final reject tailings, typically requires further work to be performed, a process called scavenging. Selecting, namely selecting qualified fine powder products obtained by secondary ore dressing of fine powder after rough selecting operation, wherein the process is called ore dressing and selecting operation. Sometimes, the rough concentrate is subjected to multiple concentration operations to obtain qualified concentrate products, and the operations are sequentially called primary concentration, secondary concentration, tertiary concentration and the like until reaching the grade requirement of the qualified concentrate. After the ore is subjected to sorting operation, most gangue and impurities are removed, and the product obtained by enriching the useful minerals is called concentrate. Concentrate is the final product of a concentrating mill and is typically used as a raw material for smelting. The final concentrate can be called qualified concentrate only if the main components and the impurity content of the final concentrate reach the national standard. The intermediate product obtained in the sorting process is called middlings, the useful fraction of which is generally comprised between concentrate and tailings. The process steps not described in detail in the present invention are all understood by conventional operations.
The above embodiments are merely specific examples for further detailed description of the object, technical solution and advantageous effects of the present invention, and the present invention is not limited thereto. Any modification, equivalent replacement, improvement, etc. made within the scope of the present disclosure are included in the scope of the present invention.
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| PCT/CN2024/131198 WO2025152579A1 (en) | 2024-01-15 | 2024-11-11 | Combined beneficiation method for low-grade, high-mud-content and fine-grained tin tailings |
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| CN118142699A (en) * | 2024-05-13 | 2024-06-07 | 栾川县格诺矿业有限公司 | A comprehensive utilization method of high-talc molybdenum tailings |
| WO2025152579A1 (en) * | 2024-01-15 | 2025-07-24 | 柳州华锡有色设计研究院有限责任公司 | Combined beneficiation method for low-grade, high-mud-content and fine-grained tin tailings |
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| CN103934095A (en) * | 2014-03-31 | 2014-07-23 | 广西华锡集团股份有限公司再生资源分公司 | Process for recovering cassiterite in fine slit by means of reselection-floating-reselection principle |
| CN104588201B (en) * | 2015-01-09 | 2017-09-15 | 临武县南方矿业有限责任公司 | A kind of gravity treatment raw ore is sized mixing stage division and its application in advance |
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| CN117816361A (en) * | 2024-01-15 | 2024-04-05 | 柳州华锡有色设计研究院有限责任公司 | A combined beneficiation method for low-grade, high-mud content, fine-grained tin tailings |
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| WO2025152579A1 (en) * | 2024-01-15 | 2025-07-24 | 柳州华锡有色设计研究院有限责任公司 | Combined beneficiation method for low-grade, high-mud-content and fine-grained tin tailings |
| CN118142699A (en) * | 2024-05-13 | 2024-06-07 | 栾川县格诺矿业有限公司 | A comprehensive utilization method of high-talc molybdenum tailings |
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