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Environment-friendly gold extraction agent and preparation method thereof

A gold extracting agent and environmental protection technology, applied in the field of environmental protection gold extracting agent and its preparation, can solve the problems of endangering the life safety of humans and animals, polluting the ecological environment, restricting and other problems, achieving green environmental protection and good economic benefits, simple production method and low production cost low effect

Inactive Publication Date: 2018-08-24
韩志永
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main gold extraction method in the world is cyanide method, which has a history of more than 100 years. It occupies a dominant position in the current gold industry due to its simple process and high gold recovery rate. The cyanide used in the cyanide process There are also major defects: 1, highly toxic, seriously endangering the safety of human and animal life, and polluting the ecological environment; 2, the deterioration of technical and economic indicators for complex ores, which is extremely inconsistent with the characteristics of my country's gold ores and the changing trend of the world's gold resources. Two major flaws limit its development in the future

Method used

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  • Environment-friendly gold extraction agent and preparation method thereof

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preparation example Construction

[0020] A preparation method of an environment-friendly gold extracting agent, comprising the steps of:

[0021] ①Uniform mixing of raw materials: use a mixer to evenly mix dry sodium carbonate, urea, sodium chloride, sodium sulfide, iodine, potassium ferricyanide, sodium thiocyanate, sodium bromide and sodium thiosulfate, the mass of each component The ratio is: sodium carbonate 20%-50%, urea 10%-50%, sodium chloride 1%-10%, sodium sulfide 1%-5%, iodine 1%-5%, potassium ferricyanide 1%-5 %, sodium thiocyanate 1%-5%, sodium bromide 1%-5% and sodium thiosulfate 1%-5%;

[0022] ②Put the above-mentioned uniformly mixed raw materials in a heatable airtight container;

[0023] ③Heating and keeping warm: heat the airtight container to 700-800°C and keep warm for 1-5h;

[0024] ④Discharge cooling: Pour out the fired environmental protection gold extraction agent into an open container and cool it down to room temperature naturally;

[0025] ⑤ Crushing: crush the cooled environment-...

Embodiment 1

[0027] refer to figure 1 , using a mixer to mix dry sodium carbonate, urea, sodium chloride, sodium sulfide, iodine, potassium ferricyanide, sodium thiocyanate, sodium bromide and sodium thiosulfate evenly, wherein the mass ratio of each component is : 35% sodium carbonate, 30% urea, 5% sodium chloride, 5% sodium sulfide, 5% iodine, 5% potassium ferricyanide, 5% sodium thiocyanate, 5% sodium bromide and 5% sodium thiosulfate %, after mixing, put it in a stainless steel container and heat it to 750°C for 3 hours, then pour out the environmental protection agent and place it in an open stainless steel container to cool naturally to room temperature, and use a jaw crusher to crush it to 30mm for later use.

[0028] Use this environment-friendly gold extraction agent and sodium cyanide to leach gold from a gold ore in Hebei Province. The gold grade of the ore sample is 7.88g / t, the grinding fineness is -200 mesh, accounting for 95.5%, and the pulp concentration is 38%, adjusted by...

Embodiment 2

[0031] refer to figure 1 , use a mixer to mix dry sodium carbonate, urea, sodium chloride, sodium sulfide, iodine and potassium ferricyanide evenly, wherein the mass ratio of each component is: sodium carbonate 35%, urea 30%, sodium chloride 5% , Sodium sulfide 5%, Iodine 5%, Potassium ferricyanide 5%, Sodium thiocyanate 5%, Sodium bromide 5%, Sodium thiosulfate 5%, After mixing, put it in a stainless steel container and heat it to 760°C for 4 hours , and then pour out the environmental protection agent and place it in an open stainless steel container to cool naturally to room temperature, and use a jaw crusher to crush it to 30mm for later use.

[0032] Use this environment-friendly gold extraction agent and sodium cyanide to leach gold from a gold mine ore in Hebei Province. The gold grade of the ore sample is 5.74g / t, the grinding fineness is -200 mesh, accounting for 93%, the pulp concentration is 38%, and it is adjusted by CaO The pH of the pulp is 11, the dosage of CaO...

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Abstract

The invention relates to an environment-friendly gold extraction agent and a preparation method for the environment-friendly gold extraction agent and belongs to the technical field of gold production. The technical scheme of the environment-friendly gold extraction agent and the preparation method for the environment-friendly gold extraction agent is that the environment-friendly gold extractionagent is compounded of sodium carbonate, carbamide, sodium chloride, sodium sulphide, iodine, potassium ferricyanide, sodium thiocyanate, sodium bromide and sodium thiosulfate by thermal reaction, themass ratio of all the ingredients is 20-50% of sodium carbonate, 10-50% of carbamide, 1-10% of sodium chloride, 1-5% of sodium sulphide, 1-5% of iodine, 1-5% of potassium ferricyanide, 1-5% of sodiumthiocyanate, 1-5% of sodium bromide and 1-5% of sodium thiosulfate, the ingredients are heated to 700-800 DEG C in an airtight container to perform thermal reaction after being mixed evenly by a mixer, heat preservation is performed for 1-5 h, and the product after reaction is poured out to an open container and cooled to room temperature naturally to form the environment-friendly gold extractionagent. The environment-friendly gold extraction agent and the preparation method for the environment-friendly gold extraction agent have the positive effects that the environment-friendly gold extraction agent can completely replace sodium cyanide and is suitable for recovery and utilization of gold in gold-bearing oxidized ore and gold-bearing tail ore, and compared with other agents, the environment-friendly gold extraction agent has the characteristics of being low in production cost, simple in production method, high in applicability, environmental friendly, good in economic benefit and the like.

Description

technical field [0001] The invention relates to an environment-friendly gold extraction agent and a preparation method thereof, belonging to the technical field of gold production. Background technique [0002] Since the 21st century, the international gold price has continued to rise, gradually rising from 260 US dollars per ounce in 2001 to the current 1270 US dollars per ounce. At the same time, my country has maintained its position as the world's largest gold-producing country in recent years. Gold is a metal substance of great economic and industrial value, which plays an important role in meeting people's living needs and ensuring national financial and economic security. At present, the main gold extraction method in the world is cyanide method, which has a history of more than 100 years. It occupies a dominant position in the current gold industry due to its simple process and high gold recovery rate. The cyanide used in the cyanide process There are also major defe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/08
Inventor 韩志永柳光耀李明辉李籍民李思思
Owner 韩志永
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