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Technique for extracting copper from high-calcium high-magnesium cupric sulfide by wet method

A copper sulfide, high-calcium-magnesium technology, applied in the field of chemical metallurgy, can solve the problems of unreacted copper sulfide concentrate overall process, economic index is not as good as fire method, wet process stays in the test and small-scale production stage, etc.

Inactive Publication Date: 2009-05-27
昆明金湖冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pyrotechnic process is mature and the operation is stable, but the investment is large and SO 2 smoke problem
Since the 1960s, in order to eliminate SO 2 A lot of research has been done on the hydrometallurgy of copper sulfide ore, but because the economic indicators are not as good as those of the pyrometallurgical method, the hydrometallurgical process mostly stays in the stage of experimentation and small-scale production
[Document 7] This project mainly studies the roasting mechanism of copper sulfide concentrate, and does not reflect the overall process of copper sulfide concentrate to provide

Method used

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  • Technique for extracting copper from high-calcium high-magnesium cupric sulfide by wet method
  • Technique for extracting copper from high-calcium high-magnesium cupric sulfide by wet method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Concentrate preparation: Yunnan Dongchuan Yinmin copper concentrate is dried naturally (3-7 days) on a cement-poured flat site, with a moisture content of 5-10%. After drying, it is crushed (<2mm) and stored in The roasting ore bunker is ready to go into the furnace.

[0035] (2) Roasting: The dry concentrate stored in the raw material ore bin is continuously and evenly fed into the fluidized furnace by the screw feeder, the roasting temperature is controlled at 600°C, the air is blown into the furnace and the concentrate is boiled and burned, and the residence time in the furnace is 10h. A large amount of calcium oxide and magnesium oxide minerals in the minerals are used to absorb the sulfur dioxide gas generated during the roasting process, and generate calcium sulfate and magnesium sulfate to reduce the emission of sulfur dioxide gas and achieve the effect of "self-cleaning" roasting. Part of the roasted ore overflows from the discharge port of the fluidized flu...

Embodiment 2

[0042] (1) Concentrate preparation: Tangdan copper sulfide concentrate in Dongchuan, Yunnan, is naturally dried to a water content of 5% to 10%, then crushed and screened to less than 2mm by a wheel mill, and dried naturally on a cemented level ground for 3 to 7 days, and then stored in the raw material mine;

[0043] (2) Roasting: The dry concentrate stored in the raw material ore bin is continuously and evenly fed into the fluidized furnace by the screw feeder, the roasting temperature is controlled at 650°C, the air is blown in and the concentrate is boiled and burned in the furnace, and the residence time in the furnace is 15h. Use a large amount of calcium oxide and magnesium oxide minerals in the minerals to absorb sulfur dioxide gas generated during the roasting process, generate calcium sulfate and magnesium sulfate, and reduce the emission of sulfur dioxide gas. The iron minerals in the feed are converted into ferric oxide, which stays in the solid phase, and the sulf...

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Abstract

The invention relates to a process for extracting copper from high calcium-magnesium copper sulphite by a wet method. The process uses large amount of calcium oxide and magnesium oxide in mineral to absorb sulfur dioxide gas generated during roasting to reach the effect of self-cleaning roasting, and uses the primary mineral to neutralize redundant immersion liquid and electrolytic residual liquid for extraction to reach water balance and acid balance. At the same time, the process makes full use of copper concentrate containing sulfur, does not need to increase additional fuel, coverts the sulfur to sulfate radical at the same time, reduces acid loss during roasting and leaching, and improves leaching rate. The process overcomes multiple defects in the prior process, and combines main advantages of wet processing. Shown by test results, the leaching rate of cupric acid is more than 99 percent, integrative reclaiming rate of copper is more than 96 percent, rate of dregs is smaller than 40 percent, the weight of electrolytic copper is more than 99. 95 percent, all technical indexes reach domestic advanced level, and tailings are comprehensively utilized, so the process is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of chemical industry and metallurgy, in particular to a process for extracting copper by wet method of high-calcium-magnesium copper sulfide. Background technique [0002] The traditional copper sulfide recovery process is flotation concentrate pyrometallurgy. The pyrotechnic process is mature and the operation is stable, but the investment is large and SO 2 Smoke problem. Since the 1960s, in order to eliminate SO 2 Many studies have been carried out on the hydrometallurgy of copper sulfide ore, but because the economic indicators are not as good as those of the pyrometallurgical method, most of the hydrometallurgical processes remain in the stage of experimentation and small-scale production. Copper hydrometallurgy is currently mainly used to treat copper oxide ores, including direct acid leaching and ammonia leaching (or ammonia leaching after reduction roasting) of copper oxide ores; Bound oxide miner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B3/08C22B3/26
CPCY02P10/20
Inventor 王春云段习科傅业高徐天任罗太熙白海龙包昌良张祖奇张发苍李峥
Owner 昆明金湖冶金有限公司
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