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Gold extraction process method for refractory gold ore

A process method, gold mine technology, applied in the field of gold mine extraction process

Inactive Publication Date: 2012-07-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a process for extracting gold from refractory gold ore, so as to solve the complex operation, high cost and large pollution in the previous gold extraction methods , low withdrawal rate and other issues

Method used

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  • Gold extraction process method for refractory gold ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Gold concentrate (dry) 1000g, when the temperature of the horse boiling furnace is 400 ° C, start the temperature to 650 ° C after 30 minutes, open the door of the furnace (three times in the middle of the mines), and control the warm roasting for 60 minutes.After cooling to room temperature, the weight was 867g, and the scum rate was 86.7%.

[0032] Called 433.5g of slag, 250GH 2 So 4 (About 136ml) and 150ml of water mix, and then bake them at low temperature.When the horses boil furnace temperature is 150 ° C, the furnace is baked for 30 minutes. When the grown is baked into a block, the shovel is touched into small pieces, and then baked for 30min for 30 minutes each heated to 200 ° C and 250 ° C.

[0033] After baking at low temperature, the temperature will be heated to 550 ℃ ~ 600 ℃, and continue to bake for 60 minutes.Then cooled to room temperature, the slag weight was 422g, and the scum rate was 84.4%at the raw material.After the water was added, at the 50%grinding...

Embodiment 2

[0036] Gold concentrate (dry) 1000g, when the temperature of the horse boiling furnace is 400 ° C, start the temperature to 650 ° C after 30 minutes, open the door of the furnace (three times in the middle of the mines), and control the warm roasting for 60 minutes.After cooling to normal temperature, the weight was 920g, and the scum yield was 92.0%.

[0037] Called 460g scum, 250GH 2 So 4 (About 136ml) and 150ml of water mix, and then bake them at low temperature.When the horses boil furnace temperature is 150 ° C, the furnace is baked for 30 minutes. When the grown is baked into a block, the shovel is touched into small pieces, and then baked for 30min for 30 minutes each heated to 200 ° C and 250 ° C.

[0038] After baking at low temperature, the temperature will be heated to 550 ℃ ~ 600 ℃, and continue to bake for 60 minutes.Then cool to room temperature, the slag weighs 449g, and the scum rate is 89.8%at the raw material.After the water was added, at the 50%grinding concentr...

Embodiment 3

[0041] Gold concentrate (dry) 1000g, when the temperature of the horse boiling furnace is 400 ° C, start the temperature to 650 ° C after 30 minutes, open the door of the furnace (three times in the middle of the mines), and control the warm roasting for 60 minutes.After cooling to room temperature, the weight was 858g, and the scum rate was 85.8%.

[0042] Called 429g scum, 250GH 2 So 4 (About 136ml) and 150ml of water mix, and then bake them at low temperature.When the horses boil furnace temperature is 150 ° C, the furnace is baked for 30 minutes. When the grown is baked into a block, the shovel is touched into small pieces, and then baked for 30min for 30 minutes each heated to 200 ° C and 250 ° C.

[0043] After baking at low temperature, the temperature will be heated to 550 ℃ ~ 600 ℃, and continue to bake for 60 minutes.Then cooled to room temperature, the slag weight was 413g, and the scum rate was 82.6%at the raw material.After the water was added, at the 50%grinding conc...

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Abstract

A gold extraction process method for refractory gold ore uses continuous operations of sulfation roasting, cinder secondary low-temperature acidic roasting, middle-temperature sulfation decomposition and cyaniding gold extraction. Sulfuric acid produced in a general sulfation roasting process is utilized, cinder is secondarily roasted and oxidized in low temperature and acidic mode, then middle temperature roasting is performed to resolve sulfate, the cinder is finely ground to be cyanided and leached, and refractory gold wrapped in carbon, arsenic and sulphur can be efficiently recycled. The method combines advantages of a roasting oxidation method and an acid hot press oxidation method and enables the advantages to be achieved in normal pressure, thereby being moderate in operation conditions, quick in response speed, low in process investment cost, appropriate in production cost, environmentally-friendly and capable of achieving industrial production easily. The method is also suitable for other roasting-leaching hydrometallurgy systems.

Description

Technical field [0001] The invention involves the extraction process of gold mines, which specially provides a process method that is difficult to dip the gold mines. Background technique [0002] The reserves of difficult gold ore accounting for 60%of the world's total gold ore reserves. With the increasing exhaustion of the world's easy to dip the gold ore resources, the withdrawal of gold has gradually shifted to the difficult to dip the gold ore.This type of gold ore is mainly due to the existence of harmful elements such as carbon sulfur arsenic, which affects the immersion of gold, especially the existence of organic charcoal. So far, there is no effective way to improve the recovery of such gold ore gold. [0003] The traditional roasting oxidation method is a relatively mature difficulty to handle gold ore. It can be solved from the parcel gold in sulfide such as pyrite and poison sand, and can be comprehensively recovered by sulfur and arsenic.However, its disadvantage i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/06C22B11/08
Inventor 孟宇群杨裕祥宿少玲沈海涛关增辉
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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