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Complex copper sulphide ore thermal activating-pressure leaching technology

A technology for copper sulfide ore and pressure leaching, applied in the direction of improving process efficiency, can solve the problems of difficult and efficient leaching of complex copper concentrate, and achieve the effects of improving metal utilization rate, safe and simple operation, and low oxygen consumption

Active Publication Date: 2010-02-10
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that complex copper concentrates with chalcopyrite and tetrahedrite as the main minerals are difficult to be leached efficiently, and to provide an environmentally friendly and efficient cleaning process for thermal activation-pressure leaching of complex copper sulfide ores

Method used

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  • Complex copper sulphide ore thermal activating-pressure leaching technology
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Examples

Experimental program
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Effect test

Embodiment 1

[0048] In the pretreatment process, the thermal activation temperature is 250°C, and the holding time is 3.0h. In this process, there is no volatilization loss of lead, zinc, sulfur, arsenic and other elements, and no SO output 2 and other harmful fumes.

[0049] In the pressure leaching process, the leaching temperature is 180°C, the leaching time is 4.0h, the oxygen partial pressure is 0.6MPa, the initial sulfuric acid concentration is 1.33mol / L, the liquid-solid ratio mL / g is 5:1, and the dosage of calcium lignosulfonate is 1.25% by weight. Under the above conditions, the copper leaching rate was 90.76%, the zinc leaching rate was 93.28%, and the iron leaching rate was 29.00%.

Embodiment 2

[0051] In the pretreatment process, the thermal activation temperature is 300°C, and the holding time is 3.0h. In this process, there is no volatilization loss of lead, zinc, sulfur, arsenic and other elements, and no SO output 2 and other harmful gases.

[0052] In the pressure leaching process, the leaching temperature is 180°C, the leaching time is 4.0h, the oxygen partial pressure is 0.6MPa, the initial sulfuric acid concentration is 1.33mol / L, the liquid-solid ratio mL / g is 5:1, and the dosage of calcium lignosulfonate is 1.25% by weight. Under the above leaching conditions, the leaching rate of copper was 94.37%, that of zinc was 92.06%, and that of iron was 28.32%.

Embodiment 3

[0054] In the pretreatment process, the thermal activation temperature is 300°C, and the holding time is 3.0h. In this process, there is no volatilization loss of lead, zinc, sulfur, arsenic and other elements, and no SO output 2 and other harmful gases.

[0055] In the pressure leaching process, the leaching temperature is 200°C, the leaching time is 4.0h, the oxygen partial pressure is 0.6MPa, the initial sulfuric acid concentration is 1.33mol / L, the liquid-solid ratio mL / g is 5:1, and the dosage of calcium lignosulfonate is 1.25% by weight. Under the above leaching conditions, the leaching rate of copper was 96.37%, the leaching rate of zinc was 95.62%, and the leaching rate of iron was 22.52%.

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Abstract

The invention relates to a wet metallurgy technology of complex copper sulphide ore, in particular to a complex copper sulphide ore thermal activating-pressure leaching technology. The technical scheme of the technology is as follows: activating time is 2.0 hours under the temperature of 300 DEG C; leaching temperature is 180 DEG C; oxygen partial pressure is 0.6 MPa; initial sulfuric acid concentration is 1.23 mol / L; solid-to-liquid ratio mL / g is 5:1; surface active agent selects calcium lignin sulfonate, wherein usage amount thereof is 1.25% of the weight of fine ore; stirring speed is 500 r / min; and leaching time is 2.0 hours. The technology can not generate toxic compounds such as SO2, and the like, to cause low-air pollution, is cleaning and environmentally friendly, improves the copper leaching ratio from original less than 70% to more than 90%, smoothly solves the difficulties of easy passivation in the process of leaching yellow copper ore and tetrahedrite, improves metal use ratio, and reduces resource waste.

Description

technical field [0001] The invention relates to a hydrometallurgy technology for complex copper sulfide ores, in particular to a thermal activation-pressure leaching process for complex copper sulfide ores. Background technique [0002] With the gradual depletion and complexity of copper resources around the world and the continuous improvement of environmental protection requirements for the copper smelting process, research on hydrometallurgy technology has become increasingly active. In complex copper sulfide minerals, copper mostly exists in the form of chalcopyrite, and the primary chalcopyrite structure is stable and difficult to decompose, while tetrahedrite is more difficult to leach than chalcopyrite. For complex copper concentrates with chalcopyrite and tetrahedrite as the main minerals, the direct pressure leaching process conditions may be harsh, requiring high temperature and high pressure conditions (T>200°C, P>2.0MPa), or HNO 3 Catalytic oxidation condi...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B15/00
CPCY02P10/20
Inventor 徐志峰李强王成彦
Owner JIANGXI UNIV OF SCI & TECH
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