Multiple roasting gold extracting method for unmanageable arsenic-containing gold concentrate

A technology that is repeatedly roasted and difficult to handle is applied in the field of mineral pretreatment in the gold metallurgy industry. It can solve the problems of low recovery of gold and silver from arsenic-containing gold concentrates, and achieve low recovery of gold and silver. The method is simple and easy to improve The effect of resource utilization

Inactive Publication Date: 2007-11-28
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a simple, economical and practical method for extracting gold by multiple roasting of refractory arsenic-containing gold concentrate, which can recover gold and silver and other products to the maxi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Ingredients: Add 80g of 40 mesh coal powder to 920g of tailings after secondary roasting and cyanidation gold extraction, without adding water, mix and stir evenly;

[0020] 2. Roasting: Send the prepared materials into the fluidized fluidized furnace to ignite and roast, and control the temperature at 550°C until the materials are free of black, which means that the combustion is complete; the generated flue gas is directly emptied; the generated slag is cyanided to extract gold;

[0021] 3. Cyanide: Add water to the roasted slag to adjust slurry, pulp concentration 32%, soda ash to adjust PH = 9, sodium cyanide concentration 0.08%, cyanide leaching time 24 hours, cyanide slurry is filtered and separated to obtain Jingui liquid And tailings; Jingui liquid is sent to gold and silver refineries to extract gold and silver.

[0022] Analytical assay elements

Embodiment 2

[0024] 1. Ingredients: Add 64g of 60-mesh coal powder to 920g of tailings after secondary roasting and cyanidation gold extraction, without adding water, mix and stir evenly;

[0025] 2. Roasting: Send the prepared materials into the fluidized bed furnace to ignite and roast, and control the temperature at 600°C until the materials are free of black, which means that the combustion is complete; the generated flue gas is directly emptied; the generated slag is cyanided to extract gold;

[0026] 3. Cyanide: Add water to the roasted slag to adjust the slurry, the pulp concentration is 30%, soda ash is adjusted to PH=9, the sodium cyanide concentration is 0.10%, the cyanide leaching time is 18 hours, and the cyanided pulp is filtered and separated to obtain Jingui liquid And tailings; Jingui liquid is sent to gold and silver refineries to extract gold and silver.

[0027] Analytical assay elements

Embodiment 3

[0029] 1. Ingredients: Add 92g of 100-mesh coal powder to 920g of tailings after secondary roasting and cyanidation gold extraction, without adding water, and mix well;

[0030] 2. Roasting: Send the prepared materials into the horse boiling furnace to ignite and roast, and control the temperature at 680°C until the materials are no black, which means that the combustion is complete; the generated flue gas is directly emptied; the generated slag is cyanided to extract gold.

[0031] 3. Cyanide: Add water to the roasted slag to adjust the slurry, the pulp concentration is 30%, soda ash is adjusted to PH=9, the sodium cyanide concentration is 0.10%, the cyanide leaching time is 18 hours, and the cyanided pulp is filtered and separated to obtain Jingui liquid And tailings; Jingui liquid is sent to gold and silver refineries to extract gold and silver.

[0032] Analytical assay elements

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PUM

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Abstract

A kind of method to extract gold by time and time burning with aurin mine containing arsenic difficult to deal with, and it belongs to the mineral pretreatment technology field of gold meltallurgy industry. The character of it is as following, (1) blending: Coal powder will be added into ore tailing, which has be extracted gold by secondary burning to cyanate, according to the weight rate 7-10%, and will be uniformly mixed. (2) burning: the material prepared will be delivered into the roasting kiln to burn, the temperature will be controlled at 550-680deg.C, the smoke gas will be drained after be cleaned by dust catching, the burning residue produced will be cyanided.(3) cyaniding : the bullion will be reclaimed from the burning residue according to the routine method to extract gold by cyanating. Coal powder will be added into the ore tailing, which has be extracted gold by secondary burning to cyanide, and they will be burned over again, the ore tailing will be extract bullion by cyanating method after it has been burned, so it can be realized to reclaim bullion production furthest form aurin mine containing arsenic difficult to deal with, and the problem that the reclaim of bullion from aurin mine containing arsenic difficult to deal with is low. It takes advantage of the gold mine fully, and improves the availability of resource, the method of it is easy and feasible, is also economic.

Description

1. Technical field [0001] The invention relates to a method for extracting gold by multiple roasting of refractory arsenic-containing gold concentrate, and belongs to the technical field of mineral pretreatment technology in the gold metallurgy industry. 2. Background technology [0002] In gold smelting enterprises, for refractory gold concentrates containing arsenic, carbon, sulfur, etc., the secondary roasting pretreatment is generally used, and the slag is then cyanided. The recovery rate of gold and silver can reach 90% and 75%. As mentioned above, gold extraction tailings generally contain less than 2.0g / t of gold and less than 30g / t of silver. These tailings generally do not continue to recycle valuable elements such as gold and silver, but are directly used as cement additives and iron red raw materials. , Ceramic raw materials, etc. However, there are some refractory gold concentrates containing arsenic, carbon, sulfur, etc. Even if the secondary roasting pretreatm...

Claims

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Application Information

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IPC IPC(8): C22B11/08C22B1/02
Inventor 刘占林孙忠胜许世忠郭建东
Owner SHANDONG GUODA GOLD
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