Method for separating bismuth from arsenic in high-bismuth and arsenic sulfur concentrate

A high-arsenic bismuth sulphur concentrate and arsenic separation technology, applied in the field of mineral processing, can solve the problems of difficulty in bismuth-sulfur flotation separation, large differences in the floatability of pyrrhotite, easy entry of pyrrhotite into the flotation concentrate, etc. , to achieve the effect of solving the difficulty of separation of bismuth and arsenic, solving the high cost of leaching, and reducing the processing capacity of leaching operation.

Active Publication Date: 2018-05-01
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI +1
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AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to aim at the separation process of existing bismuth minerals and pyrite minerals, the difference in floatability of pyrrhotite is large, and some pyrrhotite with excellent floatability is very easy to enter the flotation concentrate, resulting in bismuth Sulfur flotation separation is difficult

Method used

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  • Method for separating bismuth from arsenic in high-bismuth and arsenic sulfur concentrate
  • Method for separating bismuth from arsenic in high-bismuth and arsenic sulfur concentrate
  • Method for separating bismuth from arsenic in high-bismuth and arsenic sulfur concentrate

Examples

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Effect test

Embodiment 1

[0037] In Example 1, the ore is a high-arsenic sulfur concentrate containing pyrrhotite in a certain place in Yunnan, China.

[0038] S1. 80% of the ore is ground to -0.074mm;

[0039] S2. Carry out weak magnetic separation to the product after grinding in a weak magnetic separator, and adjust the magnetic field strength to 0.15T to obtain pyrrhotite concentrate and weak magnetic tailings with stronger magnetism;

[0040] S3. Feed the weak magnetic tailings into the strong magnetic separator for strong magnetic roughing, adjust the magnetic field strength to 0.45T, and obtain the weaker magnetic pyrrhotite coarse concentrate and strong magnetic tailings;

[0041] S4. Feed the pyrrhotite coarse concentrate into the strong magnetic separator for strong magnetic concentration, adjust the magnetic field strength to 0.40T, and obtain the weaker magnetic pyrrhotite concentrate and magnetic middle ore;

[0042] S5. Combining the pyrrhotite concentrate with stronger magnetism and the...

Embodiment 2

[0047] In Example 2, the ore is a high-arsenic sulfur concentrate containing pyrrhotite in a certain place in Guangxi, China.

[0048] S1. Bismuth sulfur concentrate is ground to -0.074mm, accounting for 85%;

[0049] S2. Carry out weak magnetic separation of the product after grinding in a weak magnetic separator, adjust the magnetic field strength to 0.3T, and obtain pyrrhotite concentrate and weak magnetic tailings with stronger magnetism;

[0050] S3. Feed the weak magnetic tailings into the strong magnetic separator for strong magnetic roughing, adjust the magnetic field strength to 0.8T, and obtain the weaker magnetic pyrrhotite coarse concentrate and strong magnetic tailings;

[0051] S4. Feed the pyrrhotite coarse concentrate into the strong magnetic separator for strong magnetic concentration, adjust the magnetic field strength to 0.7T, and obtain the weaker magnetic pyrrhotite concentrate and magnetic middle ore;

[0052] S5. Combining the pyrrhotite concentrate wit...

Embodiment 3

[0057] In Example 3, the ore is a high-arsenic sulfur concentrate containing pyrrhotite in a certain place in Hunan, China.

[0058] S1. Bismuth sulfur concentrate is ground to -0.074mm, accounting for 80%;

[0059] S2. Carry out weak magnetic separation to the product after grinding in a weak magnetic separator, and adjust the magnetic field strength to 0.45T to obtain pyrrhotite concentrate and weak magnetic tailings with stronger magnetism;

[0060] S3. Feed the weak magnetic tailings into the strong magnetic separator for strong magnetic roughing, adjust the magnetic field strength to 1.0T, and obtain the weaker magnetic pyrrhotite coarse concentrate and strong magnetic tailings;

[0061] S4. Feed the pyrrhotite coarse concentrate into the strong magnetic separator for strong magnetic concentration, adjust the magnetic field strength to 0.9T, and obtain the weaker magnetic pyrrhotite concentrate and magnetic middle ore;

[0062] S5. Combining the pyrrhotite concentrate wi...

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Abstract

The invention discloses a method for separating bismuth from arsenic in high-bismuth and arsenic sulfur concentrate. According to the method, firstly, pyrrhotite with relatively high magnetism is sorted out through low intensity magnetic separation in advance; and then, pyrrhotite with relatively low magnetism is sorted out through strong magnetic separation, the pyrrhotite with relatively high magnetism and the pyrrhotite with relatively low magnetism are combined to form the sulfur concentrate mainly with the pyrrhotite, effective removing of the pyrrhotite is achieved through the action ofthe magnetic separation, preconcentration of bismuth is achieved through the scientific control of a magnetic separation condition, the handling capacity of following bismuth leaching is effectively reduced, the leaching rate of the bismuth is increased, the in-leaching grade of the bismuth is remarkably improved, a bismuth leaching agent is reasonably added in magnetic separation of tailings so that normal temperature and normal pressure leaching of the bismuth can be carried out, the chemical stability of arsenopyrite is utilized by creating conditions, the thorough separation of the bismuthfrom the aesenic is achieved, the bismuth leachate is obtained, the leachate is further hydrolyzed, a chlorine, oxygen and bismuth product is obtained, and leaching residue is arsenic concentrate.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for separating bismuth and arsenic from high-arsenic bismuth sulfur concentrate. Background technique [0002] Bismuth has unique properties. As an important metallurgical additive, a fusion alloy and a raw material for the production of drugs and chemicals, it is widely used in the industrial and medical fields. Bismuth is a dispersed rare metal element. Although there are many kinds of bismuth minerals, independent bismuth deposits are rarely formed. Bismuth is usually associated in tungsten-tin deposits or copper deposits. During the mining process of tungsten-tin-copper deposits, bismuth is usually used as The recovery of associated beneficial components is precisely due to the subordinate status of bismuth in the ore deposit, resulting in that the recovery of bismuth has not received due attention, and the recovery rate of bismuth is generally low. At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 邹坚坚冉金城叶小璐袁经中宋宝旭陈明波汪泰姚艳清王成行李沛伦陈洪兵邱显扬汤玉和胡真李汉文付华杨权志何凤文
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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