Process of efficiently recovering copper from lead matte according to oxygen pressure acid leaching and vortex electrolysis techniques

A technology of swirl electrolysis and oxygen pressure acid leaching, which is applied in the direction of photography technology, photography auxiliary technology, process efficiency improvement, etc., can solve the problems of affecting the purity of cathode copper, long production cycle, low leaching rate, etc., and achieve the reduction of black copper plate and the amount of black copper slag, the leaching rate is increased, and the effect of increasing income

Inactive Publication Date: 2015-08-12
XIANGNAN UNIV +1
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  • Abstract
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Problems solved by technology

In this method, the liquid-solid ratio is 10:1 to achieve a good leaching rate, but the liquid-solid ratio is too large, and the copper concentration in the leaching solution is low, which will bring inconvenience to production, and at the same time, it is easy to cause coking during the leaching process.
In addition, the use of general-purpose parallel plate electrowinning also has large concentration polarization, low current efficiency and affects the purity of cathode copper.
In addition to the above methods, methods such as ammonia leaching-electrodeposition and air oxidation acid leaching-electrodeposition have also been reported, but these methods have the disadvantages of long production cycle, low leaching rate, and high material consumption.
In addition, there are some technical problems in the electrowinning process

Method used

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  • Process of efficiently recovering copper from lead matte according to oxygen pressure acid leaching and vortex electrolysis techniques

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Experimental program
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Effect test

Embodiment 1

[0031] Lead matte (Cu: 34.68% Fe: 18.52% S: 16.59% Pb: 17.26% As: 0.9428% Ag: 0.1835%) is crushed, ground, after passing through a 100-mesh sieve, take 1000g of powder and dilute sulfuric acid and 20g Add the dispersant to the autoclave after slurry preparation, control the oxygen pressure of the autoclave to 1.4MPa, the liquid-solid ratio to 4:1mL / g, the concentration of sulfuric acid to 200g / L, the temperature to 150°C, and the stirring speed to 700r / min. The time is 2 hours. After the leaching reaction is completed, the pulp is extracted from the autoclave, filtered, and the filter residue is returned to the pyro-method lead smelting system to recover valuable metals such as lead and silver. Take 5L of the filtrate and add it to the cyclone electrolysis system, control the current intensity to 20A, and the current density to 500A / m 2 , the temperature is room temperature, the electrolyte flow rate is 500L / h, and the electrolysis time is 2h. After electrolysis, the cathode ...

Embodiment 2

[0033] Lead matte (Cu: 32.59% Fe: 21.79% S: 14.95% Pb: 19.96% As: 1.354% Ag: 0.2235%) is crushed, ground, after passing through a 180 mesh sieve, take 1000g of powder and dilute sulfuric acid and 20g Add the dispersant to the autoclave after slurry preparation, control the oxygen pressure of the autoclave to 1.2MPa, the liquid-solid ratio to 5:1mL / g, the concentration of sulfuric acid to 210g / L, the temperature to 150°C, and the stirring speed to 600r / min. The time is 2.5 hours. After the leaching reaction is completed, the ore pulp is extracted from the autoclave, filtered, and the filter residue is returned to the pyro-method lead smelting system to recover valuable metals such as lead and silver. Take 5L of the filtrate and add it to the cyclone electrolysis system, control the current intensity to 20A, and the current density to 500A / m 2 , the temperature is room temperature, the electrolyte flow rate is 600L / h, and the electrolysis time is 2h. After electrolysis, the cat...

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Abstract

The invention belongs to the field of nonferrous metal hydrometallurgy and discloses a process of efficiently recovering copper from lead matte according to oxygen pressure acid leaching and vortex electrolysis techniques. The method includes: taking lead matte as a raw material, crushing and grinding the lead matte, screening through a 100-mesh sieve, adding into a high-pressure autoclave along with sulfuric acid and a dispersing agent, feeding oxygen for leaching, carrying out liquid-solid separation to obtain solution containing copper sulfate, subjecting the solution containing copper sulfate to vortex electrolytic decopperation to obtain cathode copper, and returning after-electrodeposition liquid to the leaching procedure to replace sulfuric acid serving as the leaching agent. High efficiency in copper recycling can be realized, electrodeposition of copper can be selectively carried out according to the vortex electrolysis techniques, and high current level and current efficiency, low reagent consumption, reduction of production cost and improvement of enterprise benefits are realized. In addition, due to closed cycle of solution, harmful gas emission is avoided, and current concepts of circular economy and environment protection are met.

Description

technical field [0001] The invention relates to the technical field of wet treatment of lead matte, in particular to a process for efficiently recovering copper from lead matte by using oxygen pressure acid leaching-swirl electrolysis technology. Background technique [0002] During the pyro-smelting process of lead, a copper-containing sulfide-lead matte will be produced, and its main components are lead sulfide, cuprous sulfide, zinc sulfide and ferrous sulfide. The taste of copper in lead matte fluctuates greatly, and fire treatment is mostly used in China, but this method has low metal recovery rate, high energy consumption, serious environmental pollution, and long process flow. Many small and medium-sized enterprises sell lead matte directly, so that silver, lead, etc. will not be priced, but will affect the price of copper and bring losses to the enterprise. [0003] At present, with the advancement of hydrometallurgical technology, more and more hydrometallurgical r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B15/00C25C1/12
CPCY02P10/20
Inventor 李家元刘文奇周崇松
Owner XIANGNAN UNIV
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