Method for strengthening agitation leaching of cuprite red copper ore type copper oxide

A technology for copper oxide ore and stirring leaching is applied in the field of beneficiation and metallurgy, which can solve the problems of high leaching cost, high leaching temperature and low leaching rate, and achieve the effects of shortening leaching time, improving economic benefits and reducing leaching cost.

Active Publication Date: 2013-07-10
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are used for cuprite-type oxide ore raw ore. Because the copper grade of raw ore is low, generally not higher than 1.5%, the production cost is unbearable
[0007] In conventional sulfuric acid leaching, since the copper in cuprite is monovalent copper, it needs to be converted into divalent copper during the leaching process, so the leaching speed of single sulfuric acid is slow and the leaching temperature is high, resulting in high leaching cost and low leaching rate
Simple air oxidation or oxygen oxidation, because the oxygen in the air is inert oxygen, the oxidation is insufficient, the oxidation speed is slow, and the leaching speed cannot be increased
[0008] Adding oxidants such as hypochlorite, chlorate, ammonium persulfate, and manganese dioxide can increase the oxidation rate of cuprite, but the cost of the agent is high, and the oxidant components remaining in the leaching solution are unfavorable for subsequent extraction and electrowinning. impact, which is not conducive to the leaching and recycling of cuprite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The cuprite-type copper oxide ore has a particle size of less than 1mm, and the gangue is tuff, with a copper grade of 0.95% and an oxidation rate of 80%. The copper in the ore accounts for 60% of the copper contained in the ore, and the content of calcium and magnesium in the form of carbonate is less than 10%.

[0032] (1) The air is introduced into the high-pressure discharge ozone machine through the fan, and 5-8% of the oxygen in the air is converted into ozone, and the ozone-containing air is mixed with the cuprite-type copper oxide ore through the gas-liquid mixing pump, and the ozone-containing air is The mixing amount of the slurry is controlled so that the ozone content in the slurry solution is 10mg / L, and the slurry is pumped into the leaching mixing tank.

[0033] (2) Add hydrogen peroxide 1000g / t raw ore to the leaching mixing tank in step (1), add sulfuric acid, the amount of sulfuric acid added is controlled at the pH value of 1.0-1.5 at the end of leach...

Embodiment 2

[0037] The cuprite-type copper oxide ore has a particle size of less than 1mm, and the gangue is tuff, with a copper grade of 0.80% and an oxidation rate of 85%. The copper in the ore accounts for 55% of the copper contained in the ore, and the content of calcium and magnesium in the form of carbonate is less than 10%.

[0038] (1) The air is introduced into the high-pressure discharge ozone machine through the fan, and 5-8% of the oxygen in the air is converted into ozone, and the ozone-containing air is mixed with the cuprite-type copper oxide ore through the gas-liquid mixing pump, and the ozone-containing air is The amount of mixing is controlled so that the ozone content in the pulp solution is 9mg / L, and the pulp is pumped into the leaching mixing tank.

[0039] (2) Add hydrogen peroxide 800g / t raw ore to the leaching mixing tank in step (1), add sulfuric acid, control the amount of sulfuric acid added so that the pH value of the leaching end point is 1.0-1.5, heat the p...

Embodiment 3

[0043] The cuprite-type copper oxide ore has a particle size of less than 1mm, and the gangue is tuff, with a copper grade of 0.70% and an oxidation rate of 85%. The cupric oxide ore is mainly cuprite, followed by azurite. The ore contains 55% of copper, and the content of calcium and magnesium in the form of carbonate is less than 10%.

[0044] (1) The air is introduced into the high-pressure discharge ozone machine through the fan, and 5-8% of the oxygen in the air is converted into ozone, and the ozone-containing air is mixed with the cuprite-type copper oxide ore through the gas-liquid mixing pump, and the ozone-containing air is The mixing amount of the slurry is controlled so that the ozone content in the slurry solution is 5mg / L, and the slurry is pumped into the leaching mixing tank.

[0045] (2) Add hydrogen peroxide 500g / t raw ore to the leaching mixing tank in step (1), add sulfuric acid, control the amount of sulfuric acid added so that the pH value of the leaching...

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Abstract

The invention relates to a method for strengthening agitation leaching of cuprite red copper ore type copper oxide. For copper oxide ore which is fine in ore granularity, low in content of calcium and magnesium existing in the form of carbonates, ozone and hydrogen peroxide are added to ore pulp for heating sulfuric acid leaching; with the addition of an active oxidant, the leaching temperature is reduced, the leaching time is shortened, the leaching efficiency is improved and the leaching cost is reduced; therefore, the cuprite red copper ore type copper oxide difficult to be treated is recycled economically and efficiently.

Description

[0001] technical field [0002] The invention relates to a method for strengthening the agitation and leaching of cupricite-type copper oxide ore, which belongs to the technical field of ore dressing and metallurgy. Background technique [0003] Copper oxide ore accounts for 25% to 30% of copper ore resources. Today, copper sulfide resources are depleted and depleted, and recycling copper oxide ore has become one of the important topics in beneficiation and metallurgy. The recycling methods of copper oxide ore mainly include flotation method and leaching recovery method. For free copper oxide minerals with coarse crystal grain size and existing in the form of malachite and azurite, sulfidation flotation can obtain satisfactory results. Copper in the form of copper ore can only be recovered by sulfuric acid leaching, but for ores containing calcium magnesium carbonate, acid leaching is limited. As for cuprite, sulfide xanthate is difficult to vulcanize, and the diameter has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B3/08
CPCY02P10/20
Inventor 文书明刘殿文方建军沈海英丰奇成邓久帅刘建
Owner KUNMING UNIV OF SCI & TECH
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