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Method for flotation separation of chalcopyrite and arsenopyrite in copper rough concentrate

A technology of coarse concentrate and chalcopyrite, applied in flotation, solid separation, etc., can solve problems such as copper and arsenic separation difficulties, achieve the effects of increasing the difference in floatability, efficient utilization, and promoting adsorption

Active Publication Date: 2019-09-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the existing beneficiation technology, when chalcopyrite and arsenopyrite are separated by flotation, due to the similar mineral surface properties, heavy metal ions such as copper have an activation effect on arsenic, and a large part of arsenic is activated by copper ions while suppressing arsenic. Copper, arsenic separation becomes difficult and other problems, in order to make better use of the existing copper sulfide ore resources in my country, the present invention provides a method for separation of chalcopyrite and arsenopyrite in copper rough concentrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for flotation separation of chalcopyrite and arsenopyrite in the copper rough concentrate, its specific steps include as follows:

[0023] Copper rough concentrate (taken as the copper rough concentrate produced by a copper sulfide ore dressing plant in Mengzi, Yunnan Province, the grade of Cu is 19.14wt%, the grade of As is 7.21wt%, and the copper-containing minerals are mainly chalcopyrite, chalcocite, porphyri Copper ore, the arsenic-containing minerals are mainly arsenopyrite) Adjust the mass percentage concentration of the pulp to 10% and pH to 9, first add 1000g / t Na 2 S 2 o 3 Stir for 4min, then add 600g / t NH 4 Stir with Cl for 2min, and finally add 300g / t of CuSO 4 Stir for 2 minutes, carry out conventional flotation to obtain rough ore concentrate products, and rough concentrate ore products are obtained after three times of beneficiation.

[0024] The final rough concentrate product contains 23.74wt% of Cu and 0.19wt% of As; compared with conven...

Embodiment 2

[0026] The method for flotation separation of chalcopyrite and arsenopyrite in the copper rough concentrate, its specific steps include as follows:

[0027] Copper coarse concentrate (copper coarse concentrate produced by a copper-containing polymetallic ore dressing plant in Guiyang, Hunan Province, Cu grade 21.06wt%, As grade 4.21wt%, copper-bearing minerals are mainly chalcopyrite, malachite, containing The arsenic minerals are mainly arsenopyrite, arsenopyrite) to adjust the mass percent concentration of the slurry to 20% and pH to 8, and first add 100g / t of Na 2 S 2 o 3 Stir for 2min, then add 200g / t NH 4 Stir with Cl for 1min, and finally add 100g / t of CuSO 4 Stir for 1 min, carry out conventional flotation to obtain rough ore concentrate products, and rough ore concentrate products are obtained after 2 times of beneficiation.

[0028] The final rough concentrate product contains Cu23.33wt% and As0.11wt%; compared with conventional flotation, the rough concentrate pr...

Embodiment 3

[0030] The method for flotation separation of chalcopyrite and arsenopyrite in the copper rough concentrate, its specific steps include as follows:

[0031] Copper rough concentrate (copper rough concentrate produced by a copper-bearing ore dressing plant in Yinjiang, Guizhou, with a Cu grade of 18.06wt%, an As grade of 9.21wt%, and copper-bearing minerals mainly including chalcopyrite, bornite, and malachite , the arsenic-containing minerals are mainly arsenopyrite, arsenite, arsenite) to adjust the mass percentage concentration of the pulp to 15% and the pH to 10, first add 500g / t of Na 2 S 2 o 3 Stir for 5min, then add 1000g / t NH 4 Stir with Cl for 3min, and finally add 500g / t of CuSO 4 Stir for 3 minutes, carry out conventional flotation to obtain rough ore concentrate products, and rough ore concentrate products are obtained after four times of beneficiation.

[0032] The final rough concentrate product contains 22.41wt% of Cu and 0.17wt% of As; compared with conventi...

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Abstract

The invention relates to a method for flotation separation of copper pyrites and arsenopyrite in copper rough concentrate, and belongs to the technical field of mineral processing. The mass percent concentration and pH of pulp of the copper rough concentrate are regulated, Na2S2O3, NH4Cl and CuSO4 are sequentially added to conduct conventional flotation to obtain a rough concentrate product, and the rough concentrate product is subjected to multiple times of concentration to obtain a final rough concentrate product. The method effectively eliminates the activation effect of copper ions to arsenopyrite, an AsO4NH4Cu-6H2O hydrophilic film generated after reaction prevent xanthic acid from being adsorbed on the surface of arsenopyrite. Meanwhile, a copper sulfide film is generated on the surface of copper pyrites, adsorption of xanthic acid on the surface of the copper pyrites is promoted, the hydrophobicity of the copper pyrites is improved, and thus the floatability difference between the copper pyrites and the arsenopyrite is improved.

Description

technical field [0001] The invention relates to a method for flotation separation of chalcopyrite and arsenopyrite in copper rough concentrate, belonging to the technical field of mineral processing. Background technique [0002] Copper is an important strategic metal, which is widely used in electrical, electronic, mechanical manufacturing, aerospace and other fields due to its good ductility, high thermal conductivity and electrical conductivity. With the development of the national economy, the demand for copper is increasing day by day. According to the research data of the National Bureau of Statistics, my country's copper consumption has reached 10.2 million tons in 2016, and continues to rise. [0003] However, the large-scale development and utilization of copper ore resources in recent years has led to a substantial reduction in rich ore resources, and the phenomenon of resource depletion is serious. At the same time, many large and medium-sized copper mines in my...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D103/02
Inventor 余力刘全军宋建文高扬梁远琴赵刘闯袁华玮张一超张辉
Owner KUNMING UNIV OF SCI & TECH
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