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Method for flotation of copper from low-grade copper sulfide ore with high pyrrhotite content

A pyrite, low-grade technology, applied in flotation, process efficiency improvement, solid separation, etc., can solve the problems of high copper loss rate, low copper recovery rate, etc., to reduce adverse effects, high product quality, production The effect of process stabilization

Active Publication Date: 2022-06-07
CHINA MINMETALS CHANGSHA MINING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest advantage of this method is that it is easy to operate, less dosage of chemicals, and lower cost. However, the loss rate of copper in the magnetic separation concentrate is relatively large, which is 10% to 15%, resulting in a low final copper recovery rate.

Method used

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  • Method for flotation of copper from low-grade copper sulfide ore with high pyrrhotite content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a method for flotation of copper from low-grade and high-pyrrhotite copper sulfide ore, the raw ore used is high-pyrrhotite copper sulfide ore, containing 1.11% chalcopyrite, Iron ore 39.91%, pyrite 6.44%; specifically including the following steps:

[0052] S1. Crushing the high pyrrhotite copper sulfide ore to obtain ore powder, adding 2000g / t lime and 300g / t CD-2 inhibitor for wet grinding during the grinding process, so that the particle size in the ore powder is less than 0.074mm The solid particles of the ore powder account for 75% of the mass of the ore powder, and water is added to adjust the slurry concentration to 33% to obtain a primary ore slurry;

[0053] S2, add 42g / t of ethyl thiourethane, 4g / t of 2# oil to the primary pulp of step S1 to carry out the first copper roughing to obtain a rough concentrate and a roughing tailings; to a roughing Add 18g / t of ethyl thiocarbamate and 4g / t of 2# oil to the tailings for the second copper ...

Embodiment 2

[0085] This embodiment provides a method for flotation of copper from low-grade and high-pyrrhotite copper sulfide ore, the raw ore used is high-pyrrhotite copper sulfide ore, containing 1.08% chalcopyrite, 40.75% of iron ore, 5.98% of pyrite; compared with Example 1, the difference is that the dosage of the agents in each step is adjusted, as follows; the rest are roughly the same as Example 1, and will not be repeated here.

[0086] In step S1, adding 1500g / t lime and 400g / t CD-2 inhibitor for wet grinding,

[0087] In step S2, add 40g / t thiocarbamate, 3g / t 2# oil to carry out the first copper roughing, add 15g / t thiocarbamate, 3g / t 2# oil to carry out the second Secondary copper rough selection;

[0088] In step S3, add 2g / t of thiocarbamate to carry out the first copper sweep, and add 2g / t of thiocarbamate to carry out the second copper sweep;

[0089] In step S4, add 2g / t of thiourethane to carry out a copper fine sweep;

[0090] In step S5, add 200g / t lime, 120g / t CD-...

Embodiment 3

[0097] This embodiment provides a method for flotation of copper from low-grade and high-pyrrhotite copper sulfide ore. The raw ore used is high-pyrrhotite copper sulfide ore containing 1.23% chalcopyrite and Iron ore 30.46%, pyrite 13.75%; compared with Example 1, the difference is that the concentration of the primary slurry in step S1 and the mass percentage of ore with a particle size of less than 0.074mm in step S1 are adjusted, and step S5 is less than 0.038 The mass percentage of the ore of mm, the dosage of the medicament in each step, are as follows; the rest are roughly the same as in Example 1, and will not be repeated here.

[0098] In step S1, 3000g / t lime and 200g / t CD-2 inhibitor are added for wet grinding, so that the solid particles with a particle size of less than 0.074mm in the mineral powder account for 70% of the mass of the mineral powder, and water is added to adjust the slurry concentration to 31%;

[0099] In step S2, add 45g / t thiocarbamate, 5g / t 2#...

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Abstract

The invention provides a method for flotation of copper from low-grade copper sulphide ore with high pyrrhotite content, which comprises the following steps: breaking raw ore into powder, adding lime and CD-2, and carrying out wet grinding to obtain primary ore pulp; rough concentrate and roughed tailings are obtained through multiple times of copper roughing on the primary ore pulp; copper scavenging is conducted on the roughing tailings for multiple times, copper pre-concentration is conducted on the rough concentrate, and pre-concentration concentrate and pre-concentration tailings are obtained; and performing copper fine scavenging on the pre-concentrated tailings, adding lime, CD-2 and sodium sulfide into the pre-concentrated concentrate, performing wet grinding to obtain secondary ore pulp, and performing four times of copper concentration and two times of copper fine scavenging on the secondary ore pulp to obtain copper concentrate and tailings. According to the method, pre-concentration operation is set, concentration is increased, small tailings are discharged, accumulation of pyrrhotite is avoided, the efficient inhibitor CD-2 is combined, the adverse effect of the efficient inhibitor CD-2 on copper flotation is reduced, and high-grade copper concentrate is obtained; the problem that the recovery index of copper in the low-grade high-pyrrhotite copper sulfide ore is not ideal is solved, and an effective method is provided for development and utilization of copper ore resources.

Description

technical field [0001] The invention relates to the technical field of copper recovery, in particular to a method for flotation of copper from low-grade and high-pyrrhotite-content copper sulfide ore. Background technique [0002] With the continuous utilization of mineral resources, there are fewer and fewer copper ore resources. The domestic copper ore resources are mainly sulfide copper ore; some copper sulfide ores have extremely low copper grades. In addition to pyrite, the ores also contain Contains a large amount of pyrrhotite. In the process of copper flotation recovery, the flotation separation of pyrite and chalcopyrite is relatively easy, while pyrrhotite is relatively unstable due to its own instability (there are vacancies in iron atoms in the lattice layer, resulting in pyrrhotite It has a stronger reaction ability than other sulfide ores), which has a greater impact on the slurry system, resulting in a slower floating speed of some fine-grained chalcopyrite. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/018B03B1/00B03D103/02B03D101/06
CPCB03D1/00B03D1/018B03B1/00B03D2203/02B03D2201/06Y02P10/20
Inventor 翟旭东祁忠旭孙大勇冯程李杰肖舜元韩远燕王龙欧阳林莉陈巧妹江旭宋水祥石青朱志伟周浩闫国辉
Owner CHINA MINMETALS CHANGSHA MINING RES INST
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