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Pretreatment method of refractory gold ore

A technology for pretreatment and gold mining, applied in grain processing, improvement of process efficiency, etc., can solve problems such as no process, and achieve the effect of reducing manufacturing requirements, reducing energy consumption, and high feasibility

Active Publication Date: 2012-07-11
SHANGHAI MORIMATSU CHEMICAL EQUIPMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, from the relevant patent document of retrieval at present, also do not have the technique similar to the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The refractory gold ore with a cyanidation gold extraction rate of 20.25% is mixed with quartz sand at a mass ratio of 6:1, dry-milled in a vibrating mill, the grinding medium is steel balls, the vibration frequency is 350 times / min, and the ball-milling time is 30 minutes; Abrasives and dilute sulfuric acid (concentration 50 g / L) are slurried, the solid-liquid quality is controlled at 1:2, and then the pre-soaking is wet-milled in a stirring mill at a stirring rate of 200 rpm, and the ball milling time is 15 minutes. The ball milling medium is corundum balls ; The particle size of the material after ball milling is below 45 microns. The slurry after ball milling is further adjusted to control the sulfuric acid concentration at 25 g / L and the solid-liquid ratio at 1:5. The slurry after slurry adjustment is pressurized and oxidized and leached in the reactor, and the temperature is controlled at 160 o C, the total pressure is controlled at 0.9 MPa, the oxidant is oxygen...

Embodiment 2

[0024] The refractory gold ore with a cyanidation gold extraction rate of 50.62% is mixed with quartz sand at a mass ratio of 9:1, and dry-milled in a vibration mill. The grinding medium is steel balls, the vibration frequency is 200 times / min, and the ball milling time is 30 minutes; Abrasive and dilute sulfuric acid (concentration 30 g / L) are slurried, the solid-liquid quality is controlled at 1:1, and then the pre-soaking is wet-milled in the stirring mill, the stirring speed is 250 rpm, the ball milling time is 10 minutes, and the ball milling medium is agate balls ; The particle size of the material after ball milling is below 45 microns. The slurry after ball milling is further adjusted to control the sulfuric acid concentration at 20 g / L and the solid-liquid ratio at 1:4. The slurry after slurry adjustment is pressurized and oxidized and leached in the reactor, and the temperature is controlled at 160 o C, the total pressure is controlled at 0.9 MPa, the oxidant is oxy...

Embodiment 3

[0026] The refractory gold ore with a cyanidation gold extraction rate of 61.33% is mixed with quartz sand at a mass ratio of 7:1, and dry-milled in a vibrating mill. The grinding medium is steel balls, the vibration frequency is 300 times / min, and the ball-milling time is 20 minutes; The abrasive is slurried with dilute sulfuric acid (concentration 40 g / L), the solid-liquid quality is controlled at 1:2, and then the pre-impregnation is wet-milled in the stirring mill, the stirring speed is 300 rpm, the ball milling time is 10 minutes, and the ball milling medium is corundum balls ; The particle size of the material after ball milling is below 45 microns. The slurry after ball milling is further adjusted to control the sulfuric acid concentration at 30 g / L and the solid-liquid ratio at 1:5. The slurry after slurry adjustment is pressurized and oxidized and leached in the reactor, and the temperature is controlled at 150 o C, the total pressure is controlled at 0.9 MPa, the ox...

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Abstract

The invention discloses a pretreatment method of refractory gold ore, which is characterized by comprising the following steps of: adopting a dry-wet two-level ball grinder activating and impregnation process; carrying out first-level dry grinding by adopting a vibratory ball grinder and efficiently improving the mineral activity on the basis of energy conservation through adjusting the content of quartz in a ball grinding sample; carrying out second-level wet grinding by adopting a stirred ball grinder, simultaneously carrying out the mineral grain size reduction and the acid addition and preimpregnation, further damaging a mineral structure, realizing the complete oxidation and decomposition of sulfide ore at a lower temperature and a pressure through controlling the content of sulfuricacid, the solid-to-liquid ratio and the oxygen partial pressure in a reaction vessel and restraining the generation of elemental sulfur. The pretreatment method has the advantages of low extraction temperature, short time and low energy consumption.

Description

technical field [0001] The invention relates to a method for pretreatment of refractory gold ore. Specifically, it is a refractory gold ore pretreatment method realized by a pressurized oxidation prepreg process. Background technique [0002] Gold is a metal discovered and utilized earlier by human beings. It has been used as financial reserves and precious jewelry for a long time. Due to its excellent performance, gold has also been widely used in modern high-tech industries, such as electronics, communications, aerospace, chemical, Medical and other technical fields. With the large-scale mining of gold mines, easily leachable gold ore resources are now increasingly exhausted, and refractory gold ore will become an important resource for the gold industry in the future. How to effectively and sustainably develop and utilize refractory gold mines is a technical problem that my country's gold industry urgently needs to solve. [0003] my country's refractory gold ore resou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/08B02C17/10
CPCY02P10/20
Inventor 司鹏叱干婷郝振良张克雄
Owner SHANGHAI MORIMATSU CHEMICAL EQUIPMENT CO LTD
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