Method for extracting high-purity pyrite and arsenopyrite from carlin-type gold deposit

A technology for golden pyrite and pyrite, which is applied in the field of extracting high-purity pyrite and arsenopyrite, which can solve the problems that gold-bearing minerals cannot be reached, the chemistry or physics of gold-bearing minerals cannot be correctly expressed, and research cannot be carried out.

Active Publication Date: 2014-04-30
ZIJIN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relevant research cannot be carried out if there is no high-purity gold-bearing mineral or the gold-bearing mineral fails to meet the relevant requirements
At present, there are few basic studies on gold-bearin...

Method used

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  • Method for extracting high-purity pyrite and arsenopyrite from carlin-type gold deposit
  • Method for extracting high-purity pyrite and arsenopyrite from carlin-type gold deposit
  • Method for extracting high-purity pyrite and arsenopyrite from carlin-type gold deposit

Examples

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example 1

[0031] Example 1: A certain ore in Guizhou was leached with 20% hydrochloric acid and the reducing agent sodium sulfite, stirred and leached at a constant temperature of 70°C for 1 hour, filtered, washed 3 times with dilute hydrochloric acid, washed 4 times with deionized water, and dried at 65°C. Transfer the filter residue into a polytetrafluoroethylene beaker, add copper sulfate, 20% sulfuric acid and hydrofluoric acid, heat on the electric hot plate to decompose silicate minerals, add hydrofluoric acid after 1 hour, continue heating for 30 minutes after stirring, and then solid-liquid separate. When filtering, wash 5 times with water, then wash 1 time with 1% sodium hydroxide solution, keep it wet on the filter paper for about 1 hour, then wash 8 times with 5% dilute hydrochloric acid solution, and finally wash the filter residue with deionized water, Obtain sulfide minerals with a purity greater than 95%. Prepare a silver nitrate-silver iodide mixture with a melting poin...

example 2

[0032] Example 2: A certain ore in Guizhou was leached with 10% hydrochloric acid, stirring and leaching at room temperature for 1 hour, filtered, washed 3 times with dilute hydrochloric acid, then washed 4 times with deionized water, and dried at 65°C. Transfer the filter residue into a polytetrafluoroethylene beaker, add copper sulfate, 20% sulfuric acid and hydrofluoric acid, heat on the electric heating plate for 30 minutes, then add hydrofluoric acid, continue heating for 30 minutes, and then separate the solid and liquid. When filtering, wash 5 times with water, then wash 1 time with 1% sodium hydroxide solution, keep it in a wet state on the filter paper for about 30 minutes, then wash 8 times with 5% dilute hydrochloric acid solution, and finally wash the filter residue with deionized water. Obtain sulfide minerals with a purity greater than 80%. Prepare a silver nitrate-silver iodide mixture with a melting point of 280°C and a mixing specific gravity of 5.28. Use a c...

example 3

[0033]Example 3: A certain ore in Zhejiang was leached with 20% hydrochloric acid and the reducing agent sodium sulfite, stirred and leached at 70°C for 1 hour, filtered, washed 3 times with dilute hydrochloric acid, washed 4 times with deionized water, and dried at 100°C. Transfer the filter residue into a polytetrafluoroethylene beaker, add copper sulfate, 20% sulfuric acid and hydrofluoric acid, heat and decompose on the electric heating plate for 1 hour, then add hydrofluoric acid, continue heating for 1 hour, and then separate the solid and liquid. When filtering, wash 5 times with water, then wash 1 time with 1% sodium hydroxide solution, keep it wet on the filter paper for about 1.5 hours, then wash 8 times with 5% dilute hydrochloric acid solution, and finally wash the filter residue with deionized water , to obtain sulfide minerals with a purity greater than 95%. Prepare a silver nitrate-silver iodide mixture with a melting point of 280°C and a mixing specific gravity...

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Abstract

The invention relates to a method for extracting high-purity pyrite and arsenopyrite from carlin-type gold deposit. The method comprises the following steps of: selectively leaching other minerals from ore containing pyrite and arsenopyrite by using chemical agents, recycling the pyrite and arsenopyrite, and then separating pyrite from arsenopyrite using silver iodide-silver nitrate in a melting state. The method is simple in process, and is not limited by the particle size and dissociation degree of minerals. The obtained gold-bearing pyrite and arsenopyrite have high purity of minerals, less impurity, and regular surface, and are basic materials used in the basic research field such as surface structure, flotation reagent, oxidation and the like which are related to ore dressing, metallurgy, thereby solving the problem for preparing single-mineral raw material of the high-purity gold-bearing pyrite and arsenopyrite which are researched.

Description

1. Technical field [0001] The invention relates to the metallurgy industry of precious metals, in particular to a method of selectively leaching other minerals from ores containing pyrite and arsenopyrite with chemical reagents, recovering pyrite and arsenopyrite, and then using silver iodide-silver nitrate to melt and separate pyrite A method for arsenopyrite and arsenopyrite, in particular to a method for extracting high-purity pyrite and arsenopyrite from Carlin-type gold deposits. 2. Background technology [0002] With the gradual depletion of easy-to-handle gold resources, Carlin-type gold deposits have become the main raw material for gold extraction. my country's Carlin-type gold deposits account for more than 1 / 3 of my country's total gold resources, among which "Yunnan-Guizhou-Guizhou" A large number of arsenic-containing and organic carbon-containing fine-grained disseminated refractory gold mines in the Golden Triangle area are representative. This area has obtaine...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B11/00
CPCY02P10/20
Inventor 苏秀珠黄志华衷水平
Owner ZIJIN MINING GROUP
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