Difficult-to-separate copper oxide ore and sulfuric acid curing pretreatment method

A copper oxide ore and pretreatment technology, applied in the metallurgical field, can solve the problems of long aging time, high energy consumption and high grade, and achieve the effects of good economic benefit, high recovery rate and resource utilization rate, and lower production cost.

Inactive Publication Date: 2018-09-18
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The raw material of this process is copper sulfide concentrate that has been processed through mineral processing, which has high grade, high energy consumption, and long aging time, and this technology cannot be used for aging of refractory copper oxide ore.
[0004] There is no heap leaching pretreatment technology for refractory copper oxide ore at home and abroad. It is urgent and important to develop a sulfuric acid aging pretreatment method for refractory copper oxide ore with high copper leaching rate, recovery rate and resource utilization rate.

Method used

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  • Difficult-to-separate copper oxide ore and sulfuric acid curing pretreatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add refractory copper oxide ore, water, ore concentrated sulfuric acid (containing 98.3% sulfuric acid) into the Ф2000×6000 pellet machine at a mass ratio of 100:5:10. The centerline of the pellet machine is at an angle of 10 degrees to the horizontal plane. The mining machine rotates, water, concentrated sulfuric acid and refractory copper oxide ore are evenly stirred, and the reaction occurs to dissociate copper from gangue or other minerals, and make the refractory copper oxide ore loose and increase the porosity. The mature refractory copper oxide ore is transported by its own weight from the rear end of the pellet machine through the discharge hopper to the truck transportation yard for heap leaching.

Embodiment 2

[0018] Add refractory copper oxide ore, water, ore concentrated sulfuric acid (containing 98.3% sulfuric acid) into the Ф2000×6000 lump mining machine according to the mass ratio of 100:10:5. The angle between the center line of the lump mining machine and the horizontal plane is 20 degrees. The mining machine rotates, water, concentrated sulfuric acid and refractory copper oxide ore are evenly stirred, and the reaction occurs to dissociate copper from gangue or other minerals, and make the refractory copper oxide ore loose and increase the porosity. The mature refractory copper oxide ore is transported by its own weight from the rear end of the pellet machine through the discharge hopper to the truck transportation yard for heap leaching.

Embodiment 3

[0020] Add refractory copper oxide ore, water, ore concentrated sulfuric acid (containing 98.3% sulfuric acid) into the Ф2000×6000 lump mining machine according to the mass ratio of 100:20:2. The angle between the center line of the lump mining machine and the horizontal plane is 30 degrees. The mining machine rotates, and the water, concentrated sulfuric acid and refractory copper oxide ore are evenly stirred, and a reaction occurs to dissociate copper from gangue or other minerals, and make the refractory copper oxide ore loose and increase the porosity. The mature refractory copper oxide ore is transported by its own weight from the rear end of the pellet machine through the discharge hopper to the truck transportation yard for heap leaching.

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Abstract

The invention discloses a difficult-to-separate copper oxide ore and sulfuric acid curing pretreatment method and belongs to the technical field of metallurgy. The difficult-to-separate copper oxide ore and sulfuric acid curing pretreatment method comprises the following steps that difficult-to-separate copper oxide ore, water and sulfuric acid are added into a briquetting machine according to a certain proportion; and the difficult-to-separate copper oxide ore, the water and the sulfuric acid react to allow copper to be dissociated from gangue or other minerals, so that the purposes that thecopper is separated from other valuable metals and gangue minerals, the difficult-to-separate copper oxide ore is loosened, and the porosity factor is increased are achieved. With the adoption of thedifficult-to-separate copper oxide ore and sulfuric acid curing pretreatment method, dump leaching economic and technical indexes are increased substantially, so that the copper leaching rate, the recovery rate and the resource utilization rate are increased substantially, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a sulfuric acid aging pretreatment method for refractory oxide copper ore. Background technique [0002] Refractory copper oxide ore generally has the characteristics of high oxidation rate, high content of combined copper oxide, disseminated particle size, large amount of gangue (containing 60-80% gangue composition), and multi-metal symbiosis. Refractory copper oxide ore generally adopts basic heap leaching-extraction-reverse extraction-electrodeposition process. Due to the large mud content, the mud content and sulfuric acid will produce sulfate after a period of time during heap leaching, which will make the stockyard harden and have poor permeability. , resulting in low copper leaching rate and recovery rate, and high cost. [0003] Wuhan Institute of Chemical Technology has developed the sulfuric acid aging-catalytic leaching technology of copper sulfide con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B3/08C22B15/00
CPCC22B1/00C22B3/08C22B15/0071Y02P10/20
Inventor 孙刚彭东平骆步云陈波吴红林李衍林李忠洪
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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