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A beneficiation method for recovering gold and silver from copper-nickel mixed concentrate

A technology of mixing concentrates and beneficiation methods, applied in flotation, solid separation, etc., can solve the problems affecting the economic benefits of enterprises, low gold and silver grades, and failure to meet the valuation standards, so as to improve separation efficiency and accuracy, The effect of improving economic benefits and good social benefits

Active Publication Date: 2021-02-05
WESTERN MINING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grades of gold and silver in most sulfide ores are low, resulting in the grades of gold and silver in concentrates not meeting the valuation standards. In addition, non-ferrous metal enterprises do not pay enough attention to the recovery of associated gold and silver resources, which affects the economic benefits of enterprises
Among the domestic copper-nickel mining enterprises, most of the mines are high-nickel and low-copper ores. The copper grade in the raw ore is low, and the copper is basically enriched in the nickel concentrate to obtain a copper-nickel mixed concentrate. The mixed concentrate contains gold, The grade of silver is low and cannot meet the valuation standard

Method used

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  • A beneficiation method for recovering gold and silver from copper-nickel mixed concentrate
  • A beneficiation method for recovering gold and silver from copper-nickel mixed concentrate
  • A beneficiation method for recovering gold and silver from copper-nickel mixed concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1. In this example, the mixed concentrate contains 2.69% copper, 6.27% nickel, 0.37g / t gold, and 13.33g / t silver. Neither gold nor silver has reached the pricing standard.

[0019] The beneficiation process is carried out in the following steps:

[0020] (1) Concentration of copper-nickel mixed concentrate pulp: Concentrate copper-nickel mixed concentrate pulp to obtain concentrated pulp. The concentration of the pulp before concentration is 15%, and the concentration of the pulp after concentration is 50%;

[0021] (2) Grinding of copper-nickel mixed concentrate: finely grind the copper-nickel mixed concentrate to obtain grinding slurry, and the ore with a grinding fineness of -0.074mm particle size accounts for 85% to 90% of the total ore mass;

[0022] (3) Defoaming: Stir the grinding pulp obtained in step (2) vigorously, and at the same time use a high-pressure water gun to defoam to completely break the foam;

[0023] (4) Drug removal: add activated carbon...

Embodiment 2

[0031] Example 2. In this example, the mixed concentrate contains 3.51% copper, 5.75% nickel, 0.42g / t gold, and 14.27g / t silver. The copper grade is high, and neither gold nor silver has reached the pricing standard. According to the nature of the ore, it can be considered to recover part of the copper minerals, and finally obtain copper concentrate and copper-nickel mixed concentrate, so that the copper in the nickel concentrate can still meet the valuation standard.

[0032] Follow these steps:

[0033](1) Concentration of copper-nickel mixed concentrate pulp: Concentrate copper-nickel mixed concentrate pulp to obtain concentrated pulp. The concentration of the pulp before concentration is 15%, and the concentration of the pulp after concentration is 50%;

[0034] (2) Grinding of copper-nickel mixed concentrate: finely grind the copper-nickel mixed concentrate to obtain grinding slurry, and the ore with a grinding fineness of -0.074mm particle size accounts for 85% to 90% of...

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Abstract

The invention discloses a beneficiation method for recovering gold and silver from copper-nickel mixed concentrate. Copper-nickel mixed concentrate has poor drug removal effect and is difficult to separate, which leads to serious mutual inclusion of copper and nickel concentrate, which cannot reach the standard of mixed concentrate and affects the quality of concentrate. A high-efficiency copper-nickel mixed concentrate has been developed. The chemical method can remove residual chemicals to the greatest extent, improve the separation effect of copper-nickel minerals, obtain qualified single copper concentrate and nickel concentrate, and significantly improve the separation efficiency and accuracy of copper minerals and nickel minerals; To solve the problem of maximizing the enrichment of gold and silver in copper concentrate, a separation method of copper and nickel with low alkalinity was developed to avoid the adverse effects on the recovery of gold and silver under high alkali conditions, so that copper concentrate The associated gold and silver reached the valuation standard.

Description

technical field [0001] The invention relates to the technical field of beneficiation of nonferrous metal minerals, in particular to a beneficiation method for recovering gold and silver from copper-nickel mixed concentrate. Background technique [0002] With the continuous development of the economy, my country's demand for gold, silver and other precious metals is also increasing. Most of the sources of gold and silver come from the comprehensive recovery of sulfide ore resources. According to incomplete statistics, the recovery of associated gold from non-ferrous metal mineral resources in the world accounts for about 10% of the total gold output, while the associated silver output accounts for about 90% of the total silver output. There are a large amount of associated gold, silver and other precious metals in my country's sulfide ore resources. According to statistics, my country's associated gold reserves account for 33.5% of the country's total gold reserves, and the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/002B03B1/04B03D101/06B03D103/02
Inventor 彭再华罗仙平陈文军王鹏程刘波李秀江应积业田贵有罗志强
Owner WESTERN MINING CO LTD