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Process for recycling valuable metal from lead copper matte

A valuable metal, lead matte technology, applied in the direction of photography process, photography auxiliary process, process efficiency improvement, etc., to achieve the effect of light environmental burden, low requirements for corrosion resistance conditions, and simple operation

Active Publication Date: 2012-07-18
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems and deficiencies of the current lead matte treatment status and provides a process for recovering valuable metals from lead matte

Method used

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  • Process for recycling valuable metal from lead copper matte
  • Process for recycling valuable metal from lead copper matte

Examples

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example 1

[0025] A process for recovering valuable metals from lead matte, the chemical composition of lead matte used in a factory: Pb 5.89%, Cu 31.33%, Fe 28.12%, S 21.72%, SiO 2 0.3%, CaO 0.32%, Ag 0.0622%, Se 0.21%, Te 0.12%; in addition, there are a small amount of Sb, Sn, Zn and other elements. After the primary crushing treatment by the jaw crusher, the particle size of the material is less than 80 mesh after being ground by the ball mill. Weigh 200g of lead matte material, 199g of sodium hydroxide, and control the liquid-solid ratio to 4:1, pour it into a 2L small autoclave after slurry treatment, and stir and leaching for 6 hours at a temperature of 150-180°C , the stirring speed is controlled at 650r / min, the oxygen partial pressure is adjusted to 0.8MPa, and the total pressure in the kettle is maintained at 1.5MPa. After liquid-solid separation by a vacuum pump, 163.4 g of leaching residue was obtained, and the sulfur content in the residue was 0.94%. Add 1.4L of dilute su...

example 2

[0027] A process for recovering valuable metals from lead matte, the chemical composition of lead matte used in a factory: Pb 10.55%, Cu 38.42%, Fe 4.52%, S 15.72%, SiO 2 0.2%, CaO 0.47%, Ag 0.1622%. After the primary crushing treatment by the jaw crusher, the particle size of the material is less than 70 mesh after being ground by the ball mill. Weigh 304.6kg of lead matte, 143.6kg of sodium hydroxide, adjust the liquid-solid ratio to 3.5:1, and pump the material into the solution tank for 1m 3In the autoclave, the reaction temperature is controlled at 170-180 °C, the diameter of the stirring blade is 0.8 m, the speed is controlled at 120 r / min, the oxygen partial pressure is adjusted to 1.0 MPa, and the total pressure in the autoclave is maintained at 1.8 MPa. After 8 hours of leaching reaction, the liquid-solid separation operation was carried out. The desulfurization rate is 95.12%. All the obtained alkali leaching residues are sent to the middle tank for leaching in t...

example 3

[0029] A process for recovering valuable metals from lead matte, the chemical composition of lead matte used in a factory: Pb 10.70%, Cu 40.23%, Fe 3.68%, S 11.952%, SiO 2 0.5%, CaO 0.41%, Ag 0.1310%. After the primary crushing treatment by the jaw crusher, the particle size of the material is less than 60 mesh after being ground by the ball mill. Weigh 350kg of lead matte, 160kg of sodium hydroxide, adjust the liquid-solid ratio to 3:1, and pump the material into the solution tank for 1m 3 In the autoclave, the reaction temperature is controlled at 180-200 °C, the diameter of the stirring blade is 1.0 m, the speed is controlled at 100 r / min, the partial pressure of oxygen is adjusted to 1.2 MPa, the total pressure in the autoclave is maintained at 2.2 MPa, and the leaching reaction is carried out after 7 hours. Solid separation operation. The desulfurization rate is 96.2%. All the obtained alkali leaching residues are sent to the middle tank for leaching in acidic system ...

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Abstract

The invention relates to a process for recycling valuable metal from lead copper matte, which belongs to the field of nonferrous metallurgy hydrometallurgy. The process adopts pressurization oxidation leaching in an alkalic system to convent sulfur into sulfate to be desorbed, then atmospheric pressure copper leaching is performed through diluted acid, and copper electro-deposition is further performed through purification and impurity removal to obtain cathode copper. The process is a real metallurgy cleaning process, is low in requirement for corrosion resisting conditions of device material quality, basically free of sewage discharge, free of environment pollution, short in process flow, high in comprehensive recovery rate of metal and changeable in scale, and has the advantages of having strong practical applicability and adaptability to the scale and raw materials and the like.

Description

technical field [0001] The invention belongs to the field of nonferrous metallurgy hydrometallurgy, and relates to a process for recovering valuable metals from lead matte. Background technique [0002] In the lead smelting production process, the blast furnace smelting and crude lead fire refining process will produce lead matte, the main components of which are FeS, Cu 2 S, PbS, and lead matte also contain valuable metals such as gold and silver and scattered metals of selenium and tellurium. The product is usually processed by fire method in large enterprises, blown in a converter to obtain blister copper, and then further refined to obtain electric copper or sold directly. This method has the problems of long process flow, low metal recovery rate, high production cost, serious environmental pollution and the like. The wet treatment process adopts the process of roasting-leaching-electrodeposition. This process produces a large amount of sulfur dioxide during the roast...

Claims

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Application Information

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IPC IPC(8): C22B3/12C22B3/08C22B3/22C25C1/12
CPCY02P10/20
Inventor 刘井宝李振羲蔡练兵杨跃新
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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