Leaching method of low-grade copper oxide mud ore

A copper oxide, low-grade technology, applied in the field of hydrometallurgy, can solve the problems of difficult mining and utilization of copper oxide mud ore, unable to meet market demand, unable to obtain economic benefits, etc., to reduce labor intensity of workers, improve solid-liquid separation effect, high productivity

Active Publication Date: 2011-11-23
YUNNAN DIQING MINING DEV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Diqing copper oxide mud ore is a raw ore with low grade, high mud content and high content of impurities such as calcium, magnesium and iron. It cannot be effectively utilized by a single heap leaching process in the prior art, and the mud ore must be separated processing to achieve normal production
And when processing this kind of mud ore with the single stirring leaching process in the prior art, can't obtain the economic benefit that can let the enterprise survive
Therefore, as far as the current situation is concerned, on the one hand, a large amount of copper oxide slime is left idle because it is difficult to mine and utilize, and on the other hand, it cannot meet the market demand because of the shortage of valuable metal elements.

Method used

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  • Leaching method of low-grade copper oxide mud ore
  • Leaching method of low-grade copper oxide mud ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The main chemical components of the low-grade copper oxide slime processed in this embodiment are: 0.356% of free copper oxide, 0.436% of combined copper oxide, 0.072% of secondary copper sulfide, 0.429% of primary copper sulfide, Al 2 o 3 4.44%, SiO2 38.12%, Fe17.64%, CaO10.77%, MgO0.81%.

[0023] Through the following process steps:

[0024] A. Send the above-mentioned fine-grained ore slurry produced by the conventional ore washing process into the thickening tank, and perform concentration and dehydration according to the routine until the mass concentration of the underflow is 50%, and the overflow returns to the ore washing process for recycling, and the underflow automatically flows into the mixing tank;

[0025] B. In the mixing tank equipped with underflow in step A, add raffinate until the mass concentration of the underflow is 40%, then add sulfuric acid to the underflow according to the amount of 150g / l underflow, and feed waste heat steam from the sulfur...

Embodiment 2

[0030] The main chemical composition of the low-grade copper oxide slime processed in this embodiment is: 0.356% of free copper oxide, 0.435% of combined copper oxide, 0.071% of secondary copper sulfide, 0.43% of primary copper sulfide, Al 2 o 3 4.45%, SiO2 38.11%, Fe17.62%, CaO10.75%, MgO0.82%.

[0031] Through the following process steps:

[0032] A. Send the above-mentioned fine-grained ore slurry produced by the conventional ore washing process into the thickening tank, and perform concentration and dehydration according to the routine until the mass concentration of the underflow is 50%, and the overflow returns to the ore washing process for recycling, and the underflow automatically flows into the mixing tank;

[0033] B. In the mixing tank equipped with underflow in step A, add raffinate until the mass concentration of the underflow is 30%, and then add sulfuric acid to the underflow according to the amount of 100g / l underflow, and pass in waste heat steam from the ...

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Abstract

The invention provides a leaching method of low-grade copper oxide mud ore, which comprises the following process steps: concentration, leaching, washing, settling separation, dilution, clarification separating, and the like. Therefore, the leaching of low-grade refractory copper oxide ore with high mud content is realized; reliable raw material guarantee is provided for subsequent extraction of valuable elements; not only resources are integrated and valuable elements in resources are fully recovered, but also the invention has a high leaching rate, a short leaching period, and less tailing entrainment; the overflow is returned for recycle during the leaching process; the leached solid residues are neutralized with tailing slurry discharged by concentrators, and then are stored in tailing reservoirs, so no pollutant is discharged outwards, which facilitates environmental protection; additionally, the invention also has the advantages of investment saving, low operation cost, low labor intensity, and high productivity.

Description

[0001] technical field [0002] The invention relates to a method for leaching low-grade copper oxide slime, belonging to the technical field of hydrometallurgy. Background technique [0003] Stirring leaching of valuable elements in mud-bearing ores is a very mature process technology, which is widely used in the hydrometallurgical industry because of its high leaching rate and short process flow. There are the following two traditional stirring leaching processes: one is to use room temperature stirring leaching and pressure filtration. This process not only requires large investment, high equipment energy consumption, but also has high labor intensity and poor solid-liquid separation effect, which ultimately leads to high production costs. It is only suitable for processing high-grade ore, otherwise it will be difficult to make a profit; the second is to use normal temperature stirring and leaching and natural sedimentation. The disadvantages of this process are low prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/20
CPCY02P10/20
Inventor 张新普张仪金正聪杨德学孔令洪甘静於有清左治国钱建华和茂军林峰赵家宏
Owner YUNNAN DIQING MINING DEV
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