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Beneficiation method for tin-copper paragenetic sulphide ore rich in pyrrhotite

A technology for pyrrhotite and beneficiation methods, which is applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of low recovery rate, large specific gravity, and influence on sorting indicators, and achieves reduction of operating load and efficiency. The effect of production consumption, impurity content reduction and production cost reduction

Inactive Publication Date: 2017-05-31
YUNNAN TIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of deep mines, the content of pyrrhotite in the original ore of tin-copper sulfide ore in Gejiu area has been increasing, especially the pyrrhotite with strong magnetism, high specific gravity, coarse particles, and poor floatability has increased significantly. The single mineral content of the ore reaches 10.17-22.69%, which seriously interferes with the separation index of cassiterite mineral shaker gravity separation, especially the separation index of fine grained cassiterite, which is manifested by the low grade of tin coarse concentrate , low recovery rate
The traditional "float-reweight" process of tin-copper sulfide ore is no longer suitable

Method used

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  • Beneficiation method for tin-copper paragenetic sulphide ore rich in pyrrhotite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Aiming at the tin-copper symbiotic sulfide ore with a tin grade of 0.3-1.1% and a copper grade of 0.4-1.2% in Gejiu, Yunnan, the following beneficiation method is adopted, and the steps are as follows:

[0023] (1) The first magnetic separation and impurity removal: the copper-tin symbiotic sulfide ore is crushed and ground to make the original ore -200 The mesh accounts for 60%, the concentration is 35%, and then it enters the wet permanent magnetic separator for sorting, the sorting magnetic field strength is 1500Gs, and the high-iron pyrrhotite concentrate is produced;

[0024] (2) Mixed flotation: The magnetic tailings of the above step (1) are subjected to one-coarse and two-sweep mixed flotation to produce crude copper concentrate; based on the weight of the ore, the reagent system is as follows:

[0025] Rough selection: collector mixed base xanthate 100g / t, foaming agent 2# oil 20g / t;

[0026] The first sweep and the second sweep are the same: mixed base xanthate 45g / t, ...

Embodiment 2

[0038] For the raw ore of tin-copper intergrowth sulfide ore with a tin grade of 0.8% and a copper grade of 0.9%, the following beneficiation method is adopted, and the steps are as follows:

[0039] (1) The first magnetic separation and impurity removal: the copper-tin symbiotic sulfide ore is crushed and ground to make the original ore -200 The mesh accounts for 50%, the concentration is 40%, and then it enters into a wet permanent magnetic separator for sorting, and the sorting magnetic field strength is 1600Gs to produce high-iron pyrrhotite concentrate;

[0040] (2) Mixed flotation: The magnetic tailings of the above step (1) are subjected to one-coarse and two-sweep mixed flotation to produce crude copper concentrate; based on the weight of the ore, the reagent system is as follows:

[0041] Rough selection: Collector mixed base xanthate 150g / t, 2# oil 30g / t, stir for 3 minutes;

[0042] The first sweep and the second sweep are the same: mixed base xanthate 30g / t, 2# oil 15g / t, s...

Embodiment 3

[0054] For the raw ore of tin-copper symbiosis sulfide ore with a tin grade of 0.5% and a copper grade of 0.7%, the following beneficiation method is adopted, and the steps are as follows:

[0055] (1) The first magnetic separation and impurity removal: the copper-tin symbiotic sulfide ore is crushed and ground to make the original ore -200 The mesh accounts for 65%, the concentration is 30%, and then it enters the wet permanent magnetic separator for sorting, the sorting magnetic field strength is 1800Gs, and the high-iron pyrrhotite concentrate is produced;

[0056] (2) Mixed flotation: The magnetic tailings of the above step (1) are subjected to one-coarse and two-sweep mixed flotation to produce crude copper concentrate; based on the weight of the ore, the reagent system is as follows:

[0057] Rough selection: Collector mixed base xanthate 50g / t, 2# oil 15g / t, stir for 4 minutes;

[0058] The first sweep and the second sweep are the same: mixed base xanthate 60g / t, 2# oil 18g / t, s...

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Abstract

The invention discloses a beneficiation method for tin-copper paragenetic sulphide ore rich in pyrrhotite. According to the method, the tin-copper paragenetic sulphide ore is subjected to the procedures, namely magnetic separation for impurity removal of the first time, bulk flotation, ore grinding, copper-sulphur separating flotation, sulphur removal separating flotation, magnetic separation for impurity removal of the second time and full cassiterite re-separation, so that high-iron-content sulfur concentrate, copper concentrate, sulfur concentrate and tin rough concentrate are produced and obtained. The tin-copper sulphide ore, high in pyrrhotite content, in raw ore can be comprehensively utilized; impurity interference of main separation metal grading is reduced; grading conditions are improved; the main separation metal recovery rate is increased; a pyrrhotite-high-iron-content sulfur concentrate product high in additional value is obtained; and the beneficiation method is simple, easy to implement and low in production cost.

Description

Technical field [0001] The invention relates to the technical field of beneficiation methods, in particular to a beneficiation method of copper-tin symbiosis sulfide ore rich in pyrrhotite. Background technique [0002] The tin-copper symbiosis sulfide ore is the primary vein mineral resource in the deep part of the tin mine. The main metal minerals are: chalcopyrite, cassiterite, pyrite, marcasite, pyrrhotite, arsenopyrite, galena, sphalerite Ore, bornite, chalcocite, arsenic tetrahedrite, malachite, tetrahedronite, lead arsenate, siderite, hydrozincite, hemimorphite, hematite, limonite, magnetite, etc. . The main non-metallic minerals are: calcite, dolomite, quartz, feldspar, garnet, mica, pyroxene, fushanite, fluorite, tourmaline, tremolite, actinolite, etc. [0003] The traditional tin-copper symbiosis sulfide ore production process is a "float-heavy" combined process, that is, the raw ore is crushed, graded grinding, copper-sulfur mixed floatation, copper coarse concentrate ...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03B7/00B02C21/00B03D101/02B03D103/02
CPCB03D1/018B02C21/00B03B7/00B03D2201/02B03D2203/02
Inventor 袁经中陈绍伟李光英陈红兵赵荣陈明波李燕华杨缘
Owner YUNNAN TIN
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