Environment-friendly gold and silver leaching agent and preparation method thereof

A leaching agent and environment-friendly technology, applied in the field of environment-friendly gold and silver leaching agent and its preparation, can solve the problems of complex cyanide toxicology, environmental biological and aquatic biological hazards, long leaching time, etc. The effect of improving economic and social benefits and saving labor costs

Active Publication Date: 2016-06-15
张久明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its problems are long leaching time, large consumption of gold and silver ores containing sulfur, arsenic, iron, antimony and sulfuric acid slag (industrial by-products), and low leaching rate; especially for humans and livestock, it is extremely harmful and easy to kill , the aqueous solution causes damage to the water body and vegetation, and seri

Method used

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  • Environment-friendly gold and silver leaching agent and preparation method thereof
  • Environment-friendly gold and silver leaching agent and preparation method thereof
  • Environment-friendly gold and silver leaching agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The raw material composition and parts by weight of the leaching agent are: 10 parts of sodium cyanate, 5 parts of sodium chloride, 45 parts of carbonamide, 10 parts of yellow blood salt, 20 parts of tetrasodium hexacyanoferrate, 30 parts of soda , 5 parts of sodium thiosulfate. The preparation method of the environment-friendly gold and silver leaching agent is as follows: prepare the raw materials in parts by weight, then add the raw materials into the mixing agitator and stir evenly, then add the evenly stirred raw materials into the stainless steel reaction kettle, at 600 React at a temperature of -700°C for 3.5-5.5 hours, discharge and cool, and crush to 0.5-1.5 cm with a crusher. After passing the product inspection, weigh and fill it into the environment-friendly gold and silver leaching agent.

Embodiment 2

[0037] The raw material composition and parts by weight of the leaching agent are: 50 parts of sodium cyanate, 5 parts of sodium chloride, 20 parts of carbonamide, 20 parts of yellow blood salt, 10 parts of tetrasodium hexacyanoferrate, and 10 parts of soda , 15 parts of sodium thiosulfate. The preparation method of the environment-friendly gold and silver leaching agent is specifically as follows: prepare the raw materials in parts by weight, then add the raw materials into the mixing agitator and stir evenly, then add the evenly stirred raw materials into the stainless steel reaction kettle, at 500 React at a temperature of -650°C for 5.5 hours, discharge and cool, and crush it to 1 cm with a crusher. After passing the product inspection, it is weighed and filled as the environmental-friendly gold and silver leaching agent.

Embodiment 3

[0039] The raw material composition and parts by weight of the leaching agent are: 30 parts of sodium cyanate, 10 parts of sodium chloride, 30 parts of carbonamide, 20 parts of yellow blood salt, 20 parts of tetrasodium hexacyanoferrate, 25 parts of soda , 10 parts of sodium thiosulfate. The preparation method of the environment-friendly gold and silver leaching agent is as follows: prepare the raw materials in parts by weight, then add the raw materials to the mixer and stir evenly, then add the evenly stirred raw materials to the stainless steel reaction kettle, React at a temperature of ℃ for 4.5 hours, discharge and cool, and crush it to 1 cm with a crusher. After passing the product inspection, it is weighed and filled as the environmental-friendly gold and silver leaching agent.

[0040] The method of using the leaching agent of the present invention is simple and easy to operate. During use, the original equipment does not need any technical transformation. The operatio...

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PUM

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Abstract

The invention discloses an environment-friendly gold and silver leaching agent and a preparation method thereof. The leaching agent is prepared from, by weight, 1-60 parts of sodium cyanate, 1-15 parts of sodium chloride, 1-60 parts of carbamide, 1-40 parts of potassium ferrocyanide, 1-40 parts of tetrasodium hexacyanoferrate, 1-50 parts of soda and 1-15 parts of sodium thiosulfate. The preparation method of the leaching agent comprises the steps that the materials are prepared according to a proportion, and added into a mixing agitator to be evenly stirred, and then the mixture enters a stainless steel reaction still to be subjected to a high-temperature reaction for 3.5 h to 5.5 h at the temperature of 450 DEG C to 860 DEG C; and the mixture is crushed into the size of 0.1 cm to 2 cm through a crusher after being discharged and cooled, and the product is weighed and filled to from a finished product after being inspected to be qualified. According to the environment-friendly gold and silver leaching agent, no harmful or toxic ingredients are included in the product, the leaching rate is high, the applicable mine types are wide, and the raw materials are easy to buy; the technological process of production is short, cost is low, and the product quality is easy to control; and the leaching agent is nonhazardous to production personnel and livestock, and pollution to the ecological environment is avoided.

Description

technical field [0001] The invention belongs to the technical field of precious metal leaching, and in particular relates to an environment-friendly gold and silver leaching agent and a preparation method thereof Background technique [0002] The raw materials currently used in gold and silver ore leaching agents in the world are mainly cyanide, which uses cyanide ions in cyanide to form complex alloys and complex silver with gold and silver, and then adsorbed by activated carbon, zinc Silk or zinc powder replacement, to achieve the purpose of leaching gold and silver. Its problems are long leaching time, large consumption of gold and silver ores containing sulfur, arsenic, iron, antimony and sulfuric acid slag (industrial by-products), and low leaching rate; especially for humans and livestock, it is extremely harmful and easy to kill , the aqueous solution causes damage to water bodies and vegetation, and seriously pollutes the environment. With the National Twelfth Five...

Claims

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Application Information

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IPC IPC(8): C22B3/12C22B11/00
CPCC22B3/12C22B11/04Y02P10/20
Inventor 张久明
Owner 张久明
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