Method for leaching copper from copper oxide ore

A copper ore oxide and sulfuric acid technology, applied in the direction of rotary drum furnace, crucible furnace, furnace, etc., can solve the problems of unresolved production efficiency, large floor area, unrealized continuous and automatic leaching of copper ore, and solve the problem of occupying an area Large area, improved leaching rate, and the effect of saving manpower and material resources

Inactive Publication Date: 2011-12-28
PANZHIHUA QINGHONGYUAN ENVIRONMENTAL PROTECTION TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned methods only increase the leaching rate or the unit production capacity unilaterally, but the leaching rate reaches only about 78% at the highest, and the continuous and automatic leaching of copper ore has not been realized, the technical problem of low production efficiency has not been solved, and there is still an area occupied Problems such as large area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 adopts the inventive method to leach copper from copper oxide ore

[0023] Grinding a copper oxide ore with a particle size of -100 mesh and a sieve allowance of 2%, the H of dilute sulfuric acid or sulfuric acid titanium white waste acid 2 SO 4 The mass concentration is 8%, the mass flow rate of mineral powder feed is 1.5t / h, and the volume flow rate of sulfuric acid feed is 15m 3 / h, while continuously adding to the leaching reactor with horizontal stirring, the stirring speed of the reactor is 10rpm, after 2.0h, it flows out from the reactor, and the copper leaching rate of the obtained slurry is 91.14%.

Embodiment 2

[0024] Embodiment 2 adopts the inventive method to leach copper from copper oxide ore

[0025] Grinding a copper oxide ore with a particle size of -160 mesh and a sieve allowance of 3.5%, the H of dilute sulfuric acid or sulfuric acid titanium white waste acid 2 SO 4 The mass concentration is 12%, the mass flow rate of mineral powder feed is 2.0t / h, and the volume flow rate of sulfuric acid feed is 16m 3 / h, while continuously adding to the leaching reactor with horizontal stirring, the stirring speed of the reactor is 50rpm, and it starts to flow out of the reactor after 1.5h, and the leaching rate of copper in the obtained slurry is 92.76%.

Embodiment 3

[0026] Embodiment 3 adopts the inventive method to leach copper from copper oxide ore

[0027] Grinding a copper oxide ore with a particle size of -200 mesh and a sieve allowance of 3%, the H 2 SO 4 The mass concentration is 17%, the mass flow rate of mineral powder feed is 3.0t / h, and the volume flow rate of sulfuric acid feed is 18m 3 / h, while continuously adding to the leaching reactor with horizontal stirring, the stirring speed of the reactor is 100rpm, after 1.0h, it flows out from the reactor, and the copper leaching rate of the obtained slurry is 94.83%.

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Abstract

The invention relates to a method for leaching copper from copper oxide ore, and belongs to the field of extracting metal compounds from ores or concentrates by wet methods. The technical problem solved by the invention is to provide a method for leaching copper from copper oxide ore, which is continuous leaching, and has higher production efficiency than the existing technology. The method for leaching copper from copper oxide ore of the present invention comprises the following steps: adding the reaction amount of copper oxide ore and sulfuric acid into the reactor at a uniform speed, mixing, and reacting the copper oxide ore and sulfuric acid for 0.5 to 2 hours, and the obtained slurry is The material flows out from the reactor in a continuous discharging manner; wherein, the concentration of the sulfuric acid is 8-25wt%, and the copper oxide ore can pass through a 100-mesh sieve. The method of the invention improves the production efficiency of copper oxide ore leaching, realizes the continuous acid leaching of copper oxide ore, improves the copper leaching rate, greatly reduces production cost, and provides a new option for acid leaching of copper oxide ore ,with broadly application foreground.

Description

technical field [0001] The invention relates to a method for leaching copper from copper oxide ore, and belongs to the field of extracting metal compounds from ores or concentrates by wet methods. Background technique [0002] The current mineral leaching technology can be divided into two categories according to the process: batch leaching and continuous leaching. The batch leaching process is to add the leaching agent (acid or alkali), water and concentrate to the reactor with a stirring device, and contact it for a certain period of time under the specified temperature and concentration of the leaching agent. If the stirring is relatively uniform, each part of the reactor The composition, temperature, pressure and reaction speed of the parts are roughly the same. But as the reaction proceeds, the composition of the reactant changes constantly, and the reaction rate also changes constantly. When the reaction comes to an end, the materials are all discharged from the react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B3/08C22B1/00
Inventor 路瑞芳杜剑桥
Owner PANZHIHUA QINGHONGYUAN ENVIRONMENTAL PROTECTION TECH
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