Method for directly preparing copper sulfate and cathode copper from copper ore concentrate

A technology of copper concentrate and copper sulfate, applied in crucible furnaces, electric furnaces, rotary drum furnaces, etc., can solve problems such as high operating costs, accumulation of impurities, and difficulty in washing and recycling copper, so as to simplify the copper washing process and ensure the leaching effect. To achieve a variety of effects

Active Publication Date: 2008-12-24
ZIJIN MINING GROUP
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Problems solved by technology

[0003] The first method is pyrometallurgy to produce cathode copper and by-product copper sulfate, generally including roasting, smelting, blowing, refining and other processes, suitable for the application of copper concentrate with a grade of 20-30%, and this method has a large one-time investment , long process flow, high technical requirements, high energy consumption and waste gas pollution in the pyrolysis process, and with the large-scale mining of copper mines, there are fewer and fewer rich ores, which can meet the requirements of high-grade pyrometallurgy. The source of ore is less and less, which hinders the development of pyrometallurgy
[0004] The second method is hydrometallurgy to produce cathode copper, mainly including copper concentrate sulfate roasting-atmospheric acid leaching-clean liquid-electrowinning process, roasting-ammonia leaching-extraction-electrowinning process, catalytic pre-oxidation leaching-extraction -Electrowinning processes, etc. are generally suitable for lower-grade copper concentrates, and these processes have a low recovery rate of copper, generally about 90%, and the highest is 94%. The productivity and metal recovery rate are low, resulting in relatively high production costs. high
Among them, scientific researchers have done a lot of experimental research work, and have continuously improved the copper leaching process and purification process, but there are still some problems: 1. Whether it is pre-roasting leaching method or direct leaching method, dilute sulfuric acid is basically used Leaching, the acidity and impurity content of the leaching solution are high, and it is difficult to obtain qualified products by direct crystallization. If the neutralizati

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  • Method for directly preparing copper sulfate and cathode copper from copper ore concentrate

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Embodiment 1

[0028] Embodiment one: if figure 1 Shown, a kind of method for directly producing copper sulfate and cathode copper with copper concentrate, the method comprises following sequential processing steps:

[0029] (a) Sulfation roasting, slurry copper concentrate with 28% sulfur content, 78%-0.074mm particle size, and 13% grade with water and stir evenly, and send it to the boiling furnace at a temperature of 400-900°C and -30-0Pa Sulphate roasting within the range of 1 ~ 5h, and then the dusty SO produced by roasting 2 After the flue gas is collected by the dust removal equipment, acid is produced to produce sulfuric acid as a by-product;

[0030] (b) water immersion, send the calcined sand produced by roasting and the dust collected by dust collection to the water immersion tank together for 0.2-4 hours in the temperature range of 40-95 °C;

[0031] (c) filtering, filtering the water leaching pulp, and then performing iron removal, concentrated crystallization, and centrifugat...

Embodiment 2

[0037] Embodiment two: refer to figure 1 , the method further comprises the following sequential process steps:

[0038] (a) Sulfation roasting, slurry copper concentrate with 28% sulfur content, 78%-0.074mm particle size, and 13% grade with water and stir evenly, and send it to the fluidized bed furnace at a temperature of 500-700°C and -20-0Pa Sulphate roasting within a certain range for 1 to 3 hours, and then the dust-containing SO produced by roasting 2 After the flue gas is collected by the dust removal equipment, acid is produced to produce sulfuric acid as a by-product;

[0039] (b) water immersion, the calcine produced by roasting and the dust collected by dust collection are sent to the water immersion tank together for 0.5-2.5 hours in the temperature range of 60-90 °C;

[0040] (c) filtering, filtering the water leaching pulp, and then performing iron removal, concentrated crystallization, and centrifugation on the filtered high-copper leachate to obtain the produ...

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Abstract

The invention relates to a method for directly preparing bluestone and cathode copper from copper concentrate. The method orderly comprises the following technological steps: sulphating roasting, water immersion, filtration, acid dipping, filtration washing, extraction, back extraction, electrodeposition and the circular utilization of local working procedures; and when products of bluestone and electrolytic copper with high purity are obtained, side products such as sulphuric acid, iron oxide red and waste residues are simultaneously generated. The method of the invention has the characteristics of low production cost, strong material adaptability, high working efficiency, low investment, simple operation, high utilization rate of copper, diversified products and easy industrialized production, etc., so that the method is suitable to exploit and apply low-grade copper ores.

Description

1. Technical field [0001] The invention relates to a method for directly producing copper sulfate and cathode copper from copper concentrate, which is suitable for mining low-grade copper ore. 2. Background technology [0002] There are three main ways to produce copper products using copper concentrate as raw material: [0003] The first method is pyrometallurgy to produce cathode copper and by-product copper sulfate, generally including roasting, smelting, blowing, refining and other processes, suitable for the application of copper concentrate with a grade of 20-30%, and this method has a large one-time investment , long process flow, high technical requirements, high energy consumption and waste gas pollution in the pyrolysis process, and with the large-scale mining of copper mines, there are fewer and fewer rich ores, which can meet the requirements of high-grade pyrometallurgy. There are fewer and fewer ore sources, which hinders the development of pyrometallurgy. ...

Claims

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Application Information

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IPC IPC(8): C22B15/00
Inventor 陈景河邹来昌梁春来罗吉束陈淑萍张建峰张毓芳
Owner ZIJIN MINING GROUP
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