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Method for extracting pyrite in cyanide residue breaking cyanide floatation

A technology for pyrite and cyanide slag, which is applied in flotation, solid separation and other directions, can solve the problems of difficulty in flotation of fine-grained pyrite, and achieve the effect of increasing economic benefits

Active Publication Date: 2017-01-04
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for flotation of pyrite by breaking cyanide with cyanide slag, so as to solve the problem of difficult flotation of fine-grained pyrite, obtain qualified products with a sulfur grade of more than 47%, and improve economic benefits

Method used

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  • Method for extracting pyrite in cyanide residue breaking cyanide floatation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Include the following steps:

[0019] (1) Decomposition of residual cyanide in cyanide slag:

[0020] The cyanide slag is prepared into a slurry with a concentration of 30%, and the remaining cyanide in the slurry is treated by Colt'ss acid method;

[0021] (2) Slurry flotation pyrite operation after Colt’ss acid treatment includes:

[0022] (a) Put the pulp obtained in step (1) into the flotation machine for pulping; first add H 2 SO 4 Make the pH value of the pulp reach 4, then add 525g / t sodium polyphosphate, 525g / t sodium fluorosilicate as regulator, 110g / t butyl xanthate as collector, 42.5g / t methyl isobutyl carbinol As a foaming agent, the first roughing operation is carried out to obtain the first roughing concentrate;

[0023] (b) Add 525g / t sodium polyphosphate and 525g / t sodium fluorosilicate to the slurry in step (a) as regulator, 110g / t butyl xanthate as collector, 42.5g / t methyl isobutyl Base methanol is used as a foaming agent to carry out the second ...

Embodiment 2

[0027] Include the following steps:

[0028] (1) Decomposition of residual cyanide in cyanide slag:

[0029] The cyanide slag is prepared into a slurry with a concentration of 30%, and the remaining cyanide in the slurry is treated by Colt'ss acid method;

[0030] (2) Slurry flotation pyrite operation after Colt’ss acid treatment includes:

[0031] (a) Put the pulp obtained in step (1) into the flotation machine for pulping; first add H 2 SO 4 Make the pH value of the pulp reach 4, then add 500g / t sodium polyphosphate, 500g / t sodium fluorosilicate as regulator, 100g / t butyl xanthate as collector, 40g / t methyl isobutyl carbinol as The foaming agent is used for the first roughing operation to obtain the first roughing concentrate;

[0032] (b) Add 500g / t sodium polyphosphate, 500g / t sodium fluorosilicate to the pulp in step (a) as regulator, 100g / t butyl xanthate as collector, 40g / t methyl isobutyl Methanol is used as a foaming agent to carry out the second roughing operati...

Embodiment 3

[0036] Include the following steps:

[0037] (1) Decomposition of residual cyanide in cyanide slag:

[0038] The cyanide slag is prepared into a slurry with a concentration of 30%, and the remaining cyanide in the slurry is treated by Colt'ss acid method;

[0039] (2) Slurry flotation pyrite operation after Colt’ss acid treatment includes:

[0040] (a) Put the pulp obtained in step (1) into the flotation machine for pulping; first add H 2 SO 4 Make the pH value of the pulp reach 4, then add 550g / t sodium polyphosphate, 550g / t sodium fluorosilicate as regulator, 120g / t butyl xanthate as collector, 45g / t methyl isobutyl carbinol as The foaming agent is used for the first roughing operation to obtain the first roughing concentrate;

[0041] (b) Add 550g / t sodium polyphosphate, 550g / t sodium fluorosilicate to the slurry in step (a) as regulator, 120g / t butyl xanthate as collector, 45g / t methyl isobutyl Methanol is used as a foaming agent to carry out the second roughing opera...

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Abstract

The invention relates to a method for extracting pyrite in cyanide residue breaking cyanide floatation, which belongs to the method for extracting pyrite by floatation from cyanide tailings. After Colt'ss acid process on cyanide residue, the mass percentage concentration of ore pulp is 30%. H2SO4 is first added to make the PH value of ore pulp reach 4. Then, sodium polyphosphate and sodium fluosilicate are added as regulators, sodium n-butylxanthate as collectors as well as MIBC as a foaming agent. Twice roughing, twice scavenging and twice fine selection work are conducted to get the concentrate product with sulfur grade of 49.01% and recovery rate of 92.96%. The combined regulators provided by the method realize the floatation and enrichment of pyrite, solving the problem of difficulty in floatation of micro-fine particle pyrite. The method allows the cyanide residues that are hard to deal with to be fully utilized, and improves the economic efficiency.

Description

technical field [0001] The invention relates to a method for flotation of pyrite from cyanide tailings. Background technique [0002] Cyanide tailings are waste residues produced after gold is leached in the cyanide gold extraction process. For every ton of gold produced, 25,000 to 30,000 tons of cyanide waste residues are discharged. The total annual discharge of cyanide tailings in my country is 7.5 to 9 million tons, and the cumulative stockpiles have exceeded 70 million tons. It is a large industrial solid waste in my country's gold industry. . In order to maximize the use of limited mineral resources, recover valuable components and reduce environmental pollution, the recycling of cyanide tailings has received more and more attention. At present, the recovery of valuable elements in cyanide tailings by flotation is the most widely used. [0003] In nature, gold often coexists with sulfide ores, so cyanide tailings contain a certain amount of valuable metals such as co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/02B03D1/002B03D103/02
CPCB03D1/002B03D1/02B03D2203/02
Inventor 苑宏倩郑艳平王鹏郑晔赵明福郝福来
Owner CHANGCHUN GOLD RES INST
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