CN111097591A - Agent and method for improving recovery rate of copper concentrate from slag separation - Google Patents
Agent and method for improving recovery rate of copper concentrate from slag separation Download PDFInfo
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- CN111097591A CN111097591A CN201910560756.4A CN201910560756A CN111097591A CN 111097591 A CN111097591 A CN 111097591A CN 201910560756 A CN201910560756 A CN 201910560756A CN 111097591 A CN111097591 A CN 111097591A
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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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
Abstract
The invention discloses a new medicament and a method for improving recovery rate of slag-separated copper concentrate, which has the technical scheme that ore grinding pulp enters a first-stage roughing stirring barrel to be added with N-allyl-O-isobutyl thiocarbamate and a foaming agent for flotation, part of qualified copper concentrate is selected, first-stage flotation tailings are subjected to second-stage ore grinding and then enter a second-stage stirring barrel, the N-allyl-O-isobutyl thiocarbamate and the foaming agent are added, the first-stage roughing, at least one-stage concentration and at least one-stage scavenging flotation processes are performed to obtain concentrated concentrate and final tailings, the concentrated concentrate and part of copper concentrate obtained by the first-stage flotation are combined into final copper concentrate, the concentrated tailings obtained by the first-stage concentration and scavenging concentrate obtained by each scavenging are combined into middling, the middling is returned to a second-stage ball mill for secondary grinding, and the problems of butyl xanthate serving as a collecting agent are solved, The problem that the strong collecting capability and the good selectivity of the z200 cannot be compatible and the recovery rate of copper is low.
Description
Technical Field
The invention relates to the field of metallurgy, in particular to a medicament and a method for improving the recovery rate of copper concentrate from slag separation in smelting waste slag mineral separation engineering.
Background
The copper smelting slag is a main solid waste in the copper metallurgy industry, and the copper content grade in the slag is more than 0.5 percent and is higher than the grade of copper ore which is exploited and utilized at present in China. The comprehensive recovery of valuable metals in the copper smelting slag can be realized through slag beneficiation, the pollution to water and soil caused by copper smelting slag stacking is avoided, and the comprehensive utilization of resources is realized. The copper in the smelting waste slag is mostly copper sulfide and then metal copper. Large-scale slag separation plants at home and abroad mostly adopt a mode of adding the butyl xanthate and the No. z200 medicament to treat the waste slag. However, due to the reasons of fine, dispersed and uneven native copper minerals in the copper smelting slag, high requirement on grinding fineness and the like, the defects of low concentrate recovery rate and large copper loss of tailings exist in the flotation by the agents, so that the effective comprehensive recovery of the smelting slag cannot be realized, and the waste of copper resources is caused. In the prior art, the method for improving the recovery rate of the smelting waste residue copper concentrate is generally to increase the dosage of a medicament or change the dosing mode, and still has the problems of low grade of the copper concentrate, high loss of copper in tailings, high medicament cost, easy occupational health hazard generation or inadaptation to the environmental protection requirement.
A method for reducing the copper content of tailings by applying a novel collecting agent ester-105 is provided in the research on copper separation test of certain copper smelting slag (No. 6, 105-109 of volume 7 of No. 12 month in 2016 nonferrous metal science and engineering), and on the premise that ore particles with the grinding fineness of less than or equal to 0.045mm account for 85% of the whole, a flotation flow comparison test is respectively carried out by using butyl xanthate, No. z200, butylamine black powder and ester-105, so that the ester-105 effect is found to be the best, and finally copper concentrate with 18.10% of copper and the recovery rate of 87.46% is obtained. The literature compares the collecting effect of a plurality of collecting agents, and indicates that the collecting effect of the collecting agent z200 as a copper smelting slag roughing collecting agent on copper is poor, the recovery rate is low, and the loss of copper metal in tailings is large. Although the method can improve the recovery rate to a certain extent by adopting the ester-105 as the collector, the grade of the finally obtained copper concentrate is low and cannot reach the commercial sale grade of the copper concentrate, and the unit consumption of the ester-105 of the collector is as high as 140g/t, so that the medicament cost is high.
In conclusion, a method for recovering slag and selecting copper concentrate with good collecting effect and strong selectivity is still lacked at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the medicament which has good collecting effect and strong selectivity so as to improve the recovery rate of the slag-separated concentrate.
The invention also provides a method for improving the recovery rate of the slag-dressing concentrate by using the medicament.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a reagent for improving the recovery rate of copper concentrate from slag separation, which comprises a collector, wherein the collector is N-allyl-O-isobutyl thiocarbamate.
As another aspect of the present invention, there is provided a method for increasing the recovery rate of copper concentrate from slag dressing, the method comprising the steps of:
(1) grinding the copper-selecting tailings in a ball mill, and adding water into the ground copper tailings to prepare ore pulp;
(2) transferring the ore pulp obtained in the step (1) into a primary roughing stirring barrel, and adding a collecting agent and a foaming agent to perform stirring and pulp mixing operation before flotation;
(3) performing primary flotation operation on the ore pulp treated in the step (2) to obtain partial copper concentrate and primary flotation tailings;
(4) grinding the first-stage flotation tailings in the step (3) again by a second-stage ball mill, adding water into the ground first-stage flotation tailings to prepare ore pulp, moving the ore pulp into a second-stage roughing stirring barrel, adding a collecting agent and a foaming agent to perform stirring and size mixing operation before flotation, and performing primary roughing, at least one fine concentration and at least one scavenging flotation;
(5) taking the selected concentrate obtained in each selection in the step (4) as a next selection feed, taking the scavenged tailings obtained in each scavenging as a next scavenging feed, returning the selected tailings obtained in each selection to the previous flotation operation for cyclic treatment except the selected tailings obtained in the first selection, combining the selected tailings obtained in the first selection and the scavenged concentrate obtained in each scavenging into middlings, repeating the step (4) on the middlings to finally obtain a selected concentrate and final tailings, and combining the selected concentrate and part of the copper concentrate in the step (3) into final copper concentrate;
wherein the collector is N-allyl-O-isobutyl thiocarbamate.
As a further improvement of the invention, in the step (1), the copper-selecting tailings are ground to obtain ore particles with the particle size of less than or equal to 0.074mm, wherein the ore particles account for more than 75% of the total weight of the copper-selecting tailings.
As a further improvement of the invention, in the step (4), the first section of flotation tailings is ground to make ore particles with the particle size of less than or equal to 0.037mm account for more than 77% of the total weight of the first section of flotation tailings.
As a further improvement of the invention, the step (4) comprises a primary roughing flotation process, a tertiary concentration flotation process and a secondary scavenging flotation process, wherein a collecting agent and a foaming agent are added in the processes of the primary scavenging and the secondary scavenging; and no medicament is added in the first selection, the second selection and the third selection, and the selection is directly carried out.
As a further improvement of the invention, the foaming agent is 2# oil.
The medicament has the beneficial effects that: the N-allyl-O-isobutyl thiocarbamate is used for replacing a conventional collecting agent z200, and the comparison of data of the embodiment and the comparative example shows that the N-allyl-O-isobutyl thiocarbamate overcomes the defect that the strong collecting force and the good selectivity of z200 cannot be compatible, the recovery rate of the concentrate from slag separation is effectively improved, the copper loss of tailings is reduced, the comprehensive recovery of copper resources from smelting waste slag is realized, the single consumption of the collecting agent can be reduced, and the production cost is reduced.
The method has the following beneficial effects: the selected tailings obtained by the first concentration and the scavenged tailings obtained by the multiple scavenging are combined into middlings and uniformly returned to a two-stage ball mill for regrinding, and large-particle minerals are fully ground, so that copper contained in the minerals can be separated, the subsequent secondary flotation is facilitated, and the recovery rate of copper is improved.
Drawings
FIG. 1 is a flow chart of the copper tailings selecting method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.
Examples
(1) Grinding the copper-selecting tailings in a ball mill until the ore particles with the particle size of less than or equal to 0.074mm account for more than 75% of the total weight of the copper-selecting tailings, and adding water into the ground copper tailings to prepare ore pulp;
(2) transferring the overflow ore pulp in the step (1) into a first-stage roughing stirring barrel for flotation operation, sampling and testing the grade of raw ore, and then adding N-allyl-O-isobutyl thiocarbamate and 2# oil into the first-stage stirring barrel for stirring and size mixing operation before flotation;
(3) performing primary flotation operation on the ore pulp treated in the step (2) to obtain partial copper concentrate and primary flotation tailings;
(4) grinding the first-stage flotation tailings in the step (3) again through a second-stage ball mill, feeding ore pulp with the grinding fineness of less than or equal to 0.037mm and accounting for about 79% into a second-stage stirring barrel, adding N-allyl-O-isobutyl thiocarbamate and 2# oil to perform stirring and size mixing operation before flotation, then performing roughing operation on the obtained ore pulp to obtain roughed concentrate and roughed tailings, performing three-time fine concentration on the roughed concentrate, and performing two-time scavenging on the roughed tailings;
(5) performing primary concentration process on the roughing concentrate in the step (4) to obtain primary concentrated concentrate and primary concentrated tailings, performing secondary concentration process on the primary concentrated concentrate to obtain secondary concentrated concentrate and secondary concentrated tailings, returning the secondary concentrated tailings to the primary concentration process, performing tertiary concentration process on the secondary concentrated concentrate to obtain tertiary concentrated concentrate and tertiary concentrated tailings, returning the tertiary concentrated tailings to the secondary concentration process, merging the tertiary concentrated concentrate and part of the copper concentrate in the step (3) into final copper concentrate, sampling and testing the grade of the copper concentrate, manually sampling the copper concentrate, and sampling at the discharge opening of a ceramic filter of a dewatering workshop in a timing and fixed-point sampling mode to obtain the grade of the copper concentrate through a laboratory test sample;
pulping the rougher tailings obtained in the step (5), adding N-allyl-O-isobutyl thiocarbamate and 2# oil, uniformly stirring, performing first scavenging to obtain first scavenged concentrate and first scavenged tailings, pulping the first scavenged tailings, adding N-allyl-O-isobutyl thiocarbamate and 2# oil, uniformly stirring, performing second scavenging to obtain second scavenged concentrate and second scavenged tailings, wherein the second scavenged tailings are final tailings, sampling and testing the tailings, sampling the tailings by using an automatic sampler, sampling the tailings at a tailing pump pond of a grinding flotation plant, and sampling the tailings by using the sampler once in one hour;
merging the primary scavenging concentrate, the secondary scavenging concentrate and the primary concentration tailings into middlings, returning the middlings to a second-stage ball mill for regrinding, and repeating the operation in the step (4);
(6) and (3) sampling and testing the raw ore by a laboratory to obtain that the grade of the raw ore is 1.752%, obtaining the concentrate grade 23.531% and the tailings grade 0.173% by the step (5), and applying the following calculation formula of the recovery rate of the copper slag mineral separation single metal:
in the formula ∈ -recovery%
α -raw ore grade%
β -concentrate grade%
Theta-tailing grade,% of
Substituting the data into a formula to obtain the copper concentrate recovery rate of 90.793%;
calculating the consumption of the collecting agent per unit time, wherein the quotient of the consumption of the collecting agent and the treatment capacity of the copper slag is the consumption of the collecting agent per unit time, under the same other conditions, the consumption of the collecting agent N-allyl-O-isobutyl thiocarbamate is calculated based on the treatment capacity of the copper slag in 1 month, when the collecting agent N-allyl-O-isobutyl thiocarbamate is adopted, the treatment capacity of the copper slag in one month is 85771 tons, the consumption of the collecting agent N-allyl-O-isobutyl thiocarbamate is 17 barrels, and the consumption of the collecting agent N-allyl-O-isobutyl thiocarbamate is 200 kg per barrel, so that the consumption of the collecting agent N-allyl-O-isobutyl thiocarbamate per ton is.
Comparative example
Replacing the collecting agent in the steps (1) to (6) with a reagent z200, repeating the steps (1) to (8) to obtain 1.749% of raw ore grade, simultaneously finally obtaining 17.161% of concentrate grade and 0.183% of tailing grade, and combining the operation formula in the step (6) to obtain 90.502% of copper concentrate recovery rate;
when the collector z200 is adopted, the amount of the copper slag ore processed in one month is 69156 tons, the collector z200 consumes 22 barrels, and the unit consumption of the collector z200 is 63.6 g/ton when 200 kg of the collector is used in each barrel.
In summary, it can be known from the data in the examples and the comparative examples that it is difficult to find raw ores with the same raw ore grade in the prior art, so that two groups of raw ores with similar raw ore grade are found as much as possible by a laboratory, the difference between the raw ore grade of 1.752% and the raw ore grade of 1.749% is 0.003% and is accurate to 0.001, the two groups of raw ores have very close grades, i.e. the two groups of raw ores are considered to be the same, while the comparative example has a comparative ratio that the recovery rate of copper concentrate is increased from 90.502% to 90.793%, i.e. the recovery rate of copper concentrate is effectively increased by using N-allyl-O-isobutyl thiocarbamate as a collector and z200 as a collector;
the specific consumption data for the collectors in the examples and comparative examples were substituted into the following equation:
α in the formula is the unit consumption of the collecting agent N-allyl-O-isobutyl thiocarbamate;
β is the specific consumption of collector z200 and η is the specific consumption reduction percentage.
According to calculation, the unit consumption of the collecting agent is reduced by 37.7% compared with that of the collecting agent adopting z200 when the collecting agent adopts N-allyl-O-isobutyl thiocarbamate.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. The reagent for improving the recovery rate of the copper concentrate from slag separation comprises a collecting agent and is characterized in that the collecting agent is N-allyl-O-isobutyl thiocarbamate.
2. A method for improving the recovery rate of copper concentrate from slag separation comprises the following steps:
(1) grinding the copper-selecting tailings in a ball mill, and adding water into the ground copper tailings to prepare ore pulp;
(2) transferring the ore pulp obtained in the step (1) into a primary roughing stirring barrel, and adding a collecting agent and a foaming agent to perform stirring and pulp mixing operation before flotation;
(3) performing primary flotation operation on the ore pulp treated in the step (2) to obtain partial copper concentrate and primary flotation tailings;
(4) grinding the first-stage flotation tailings in the step (3) again by a second-stage ball mill, adding water into the ground first-stage flotation tailings to prepare ore pulp, moving the ore pulp into a second-stage roughing stirring barrel, adding a collecting agent and a foaming agent to perform stirring and size mixing operation before flotation, and performing primary roughing, at least one fine concentration and at least one scavenging flotation;
(5) taking the selected concentrate obtained in each selection in the step (4) as a next selection feed, taking the scavenged tailings obtained in each scavenging as a next scavenging feed, returning the selected tailings obtained in each selection to the previous flotation operation for cyclic treatment except the selected tailings obtained in the first selection, combining the selected tailings obtained in the first selection and the scavenged concentrate obtained in each scavenging into middlings, repeating the step (4) on the middlings to finally obtain a selected concentrate and final tailings, and combining the selected concentrate and part of the copper concentrate in the step (3) into final copper concentrate;
wherein the collector is N-allyl-O-isobutyl thiocarbamate.
3. The method for improving the recovery rate of the copper concentrate from slag separation according to claim 2, characterized by comprising the following steps: in the step (1), the copper-selecting tailings are ground until ore particles with the particle size of less than or equal to 0.074mm account for more than 75% of the total weight of the copper-selecting tailings.
4. The method for improving the recovery rate of the copper concentrate from slag separation according to claim 2, characterized by comprising the following steps: in the step (4), the first section of flotation tailings is ground until ore particles with the particle size of less than or equal to 0.037mm account for more than 77% of the total weight of the first section of flotation tailings.
5. The method for improving the recovery rate of the copper concentrate from slag separation according to claim 2, characterized by comprising the following steps: the step (4) comprises a primary roughing flotation process, a tertiary concentration flotation process and a secondary scavenging flotation process, wherein collecting agents and foaming agents are added in the primary scavenging and the secondary scavenging processes; and no medicament is added in the first selection, the second selection and the third selection, and the selection is directly carried out.
6. The method for improving the recovery rate of the copper concentrate from slag separation according to claim 2, 3, 4 or 5, characterized by comprising the following steps: the foaming agent is 2# oil.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471955A (en) * | 2022-01-05 | 2022-05-13 | 肃北县金鹰黄金有限责任公司 | Method for efficiently recovering gold in tailings based on flotation process |
| CN114950717A (en) * | 2022-06-07 | 2022-08-30 | 厦门紫金矿冶技术有限公司 | Rapid flotation process for copper slag with high copper simple substance content and fine embedded particle size |
| CN114471955B (en) * | 2022-01-05 | 2024-04-30 | 肃北县金鹰黄金有限责任公司 | Method for efficiently recycling gold in tailings based on flotation technology |
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| CA3056977A1 (en) * | 2017-03-23 | 2018-09-27 | Nouryon Chemicals International B.V. | Process to treat metal or mineral ores and collector composition therefor |
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| CN109365137A (en) * | 2018-08-30 | 2019-02-22 | 西北矿冶研究院 | Flotation method for comprehensively recovering copper and gold from copper-dressing tailings |
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| CN103157557A (en) * | 2013-03-18 | 2013-06-19 | 阳谷祥光铜业有限公司 | Mine selecting and copper extracting process |
| CA3056977A1 (en) * | 2017-03-23 | 2018-09-27 | Nouryon Chemicals International B.V. | Process to treat metal or mineral ores and collector composition therefor |
| CN109158222A (en) * | 2018-08-28 | 2019-01-08 | 金隆铜业有限公司 | A kind of echelon fast-flotation process of copper converter slag ore dressing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114471955A (en) * | 2022-01-05 | 2022-05-13 | 肃北县金鹰黄金有限责任公司 | Method for efficiently recovering gold in tailings based on flotation process |
| CN114471955B (en) * | 2022-01-05 | 2024-04-30 | 肃北县金鹰黄金有限责任公司 | Method for efficiently recycling gold in tailings based on flotation technology |
| CN114950717A (en) * | 2022-06-07 | 2022-08-30 | 厦门紫金矿冶技术有限公司 | Rapid flotation process for copper slag with high copper simple substance content and fine embedded particle size |
| CN114950717B (en) * | 2022-06-07 | 2024-03-08 | 厦门紫金矿冶技术有限公司 | Copper slag rapid flotation process with high copper simple substance content and fine embedded granularity |
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Application publication date: 20200505 |