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Method for recovering low-grade copper-zinc mineral from cyanidation tailings

A cyanide tailings, low-grade technology, applied in the metallurgical field, can solve problems such as harsh test environment

Inactive Publication Date: 2015-04-01
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inhibitor uses highly toxic sodium cyanide, which will also make the test environment extremely harsh

Method used

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  • Method for recovering low-grade copper-zinc mineral from cyanidation tailings
  • Method for recovering low-grade copper-zinc mineral from cyanidation tailings
  • Method for recovering low-grade copper-zinc mineral from cyanidation tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The chemical composition of a gold mine cyanide tailings filter cake is as follows:

[0017] Table 1. Element content (%) of a certain cyanide tailings filter cake

[0018]

[0019] (1) Mixing: Add water to the cyanide tailings and stir for 5 minutes to completely disperse the solid minerals. Produces a slurry with a concentration of 35%. Add 15kg / t of 8% sodium hypochlorite solution to the pulp, stir for 15min, and the pH of the pulp will increase to 12.

[0020] (2) Mixed flotation of copper-lead minerals: add ethyl thionitrogen and ethyl thiocarbamate to the above pulp as collectors, the dosages are 80g / t and 96g / t respectively, stir for 3min, through the synergy between collectors Effectively collect copper and lead minerals. Closed-circuit flotation is carried out in the flotation tank, and the roughing flotation time is 6 minutes. Sodium hypochlorite solution is not added during the sweeping, and the amount of collector is reduced by half accordingly, that ...

Embodiment 2

[0025] The chemical composition of a gold mine cyanide tailings filter cake is as follows:

[0026] Table 2. Element content (%) of a certain cyanide tailings filter cake

[0027]

[0028] (1) Mixing: Add water to the cyanide tailings and stir for 5 minutes to completely disperse the solid minerals. Generates a slurry with a concentration of 30%. Add 10% sodium hypochlorite solution 10kg / t to the pulp, stir for 15min, and the pH of the pulp will increase to 12.

[0029] (2) Mixed flotation of copper-lead minerals: add ethyl thionitrogen and ethyl thiocarbamate to the above pulp as collectors, the dosages are 80g / t and 96g / t respectively, stir for 3min, through the synergy between collectors Effectively collect copper and lead minerals. Closed-circuit flotation is carried out in the flotation tank, and the roughing flotation time is 6 minutes. Sodium hypochlorite solution is not added during the sweeping, and the amount of collector is reduced by half accordingly, that i...

Embodiment 3

[0034] The chemical composition of a gold mine cyanide tailings filter cake is as follows:

[0035] Table 3. Element content (%) of a certain cyanide tailings filter cake

[0036]

[0037] (1) Mixing: Add water to the cyanide tailings and stir for 5 minutes to completely disperse the solid minerals. Generates a slurry with a concentration of 30%. Add 13% sodium hypochlorite solution 8kg / t to the pulp, stir for 15min, and the pH of the pulp will increase to 12.

[0038] (2) Mixed flotation of copper-lead minerals: add ethyl thionitrogen and ethyl thiocarbamate to the above pulp as collectors, the dosages are 80g / t and 96g / t respectively, stir for 3min, through the synergy between collectors Effectively collect copper and lead minerals. Closed-circuit flotation is carried out in the flotation tank, and the roughing flotation time is 6 minutes. Sodium hypochlorite solution is not added during the sweeping, and the amount of collector is reduced by half accordingly, that is...

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Abstract

The invention discloses a method for recovering low-grade copper-zinc mineral from cyanidation tailings. The method comprises the following specific process steps: (1) adding water into the cyanidation tailings for mixing slurry; (2) adding a sodium hypochlorite solution into pulp, and stirring; (3) adding diethyl dithiocarbamate and ethionine ester as collecting agents, and stirring; (4) performing bulk flotation on copper-lead mineral by performing roughing once, concentration twice and scavenging once to obtain copper-lead mixed concentrate and copper-lead flotation tailings; (5) performing ultrasonic oscillation on slurry-mixed copper-lead mixed concentrate, dehydrating the copper-lead mixed concentrate subjected to ultrasonic oscillation to obtain a filter cake, mixing slurry once again, adding a CP mixture as a conditioning agent, adding ethionine ester as a collecting agent, and adding terpenic oil as a foaming agent for flotation to obtain qualified copper concentrate and copper flotation tailings; (6) performing slurry mixing on the copper-lead flotation tailings, adding copper sulfate for activating zinc mineral, adding sodium butyl xanthogenate as a collecting agent, and adding terpenic oil as a foaming agent for floatation to obtain zinc concentrate and zinc flotation tailings.

Description

technical field [0001] The invention belongs to the comprehensive utilization of solid waste slag in the field of metallurgy, in particular to a method for comprehensively recovering low-grade copper-zinc minerals in cyanidation tailing slag. Background technique [0002] Since the mid-eighteenth century, people discovered that metals such as gold and silver can be dissolved in cyanide aqueous solution, and the cyanidation method for gold extraction has been vigorously developed. my country also began to use the cyanide method to extract gold and silver precious metals in the early 20th century. There are still a large number of metallurgical enterprises using this method. However, with the popularization of cyanidation, the waste residue produced by cyanidation metallurgy has also increased the burden on the environment. According to statistics, the gold system discharges 24.5 million tons of tailings every year, covering tens of thousands of square kilometers. Cyanide t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00
Inventor 叶树峰吕翠翠钱鹏丁剑刘娅陈运法
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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