A method for replacing and removing impurities by zinc sulfate solution and its purification tank

A technology of zinc sulfate solution and purification tank, which is applied in the direction of improving process efficiency, etc., can solve the problems of low activity of zinc powder, separation, and small particle size difference of copper and cadmium slag, so as to ensure replacement capacity, ensure chemical activity, and remove copper Cadmium Cobalt Thorough Effect

Active Publication Date: 2017-11-17
LAIBIN CHINA TIN SMELTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the cadmium in the solution is to be replaced thoroughly, the excess value of zinc powder is very large, usually exceeding 300% of the theoretical requirement, and even greater when removing cobalt, reaching more than 30 times the theoretical value, resulting in the actual consumption greatly exceeding the theoretical value. There are three reasons for the required amount. One is that the effective zinc of industrial zinc powder is low, usually only 85%, and the activity of zinc powder is low. The solid matter of the copper-cadmium slag generated by the reaction is separated, and the solid matter of the copper-cadmium slag forms a partial package on the zinc powder, which further reduces the reactivity of the zinc powder. The remaining zinc powder in the reaction is separated from the copper-cadmium slag, so that the remaining zinc powder that does not participate in the reaction also enters the copper-cadmium slag, resulting in a large consumption of zinc powder, usually reaching 3-10kg / m 3 the solution

Method used

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  • A method for replacing and removing impurities by zinc sulfate solution and its purification tank

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Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, it includes liquid inlet pipe 1, purification tank tank wall 2, purification tank tank bottom 3, purification tank cover plate 4, mixer 5, exhaust pipe 7 and liquid outlet pipe 8, and the purification tank tank wall 2, purification tank The tank bottom 3 and the septic tank cover 4 form the septic tank body, and the septic tank wall 2, the septic tank bottom 3 and the septic tank cover 4 form the septic tank body, which is a reinforced concrete structure with a thickness of 300mm. The lining thickness is 50mm with anti-corrosion tiles, the internal size of the tank is Φ3.6m×H4.0m, and the total volume is 40.7m 3 , the effective volume is 35m 3 .

[0035] The agitator 5 includes a motor, a support, a stirring shaft and a stirring paddle, the motor and the support are centered on the cover plate 4 of the purification tank, the stirring shaft and the stirring paddle are all located in the center of the purification tank body, and the mixer 5 T...

Embodiment 2

[0043] Such as figure 1 As shown, it includes liquid inlet pipe 1, purification tank tank wall 2, purification tank tank bottom 3, purification tank cover plate 4, mixer 5, exhaust pipe 7 and liquid outlet pipe 8, and the purification tank tank wall 2, purification tank The tank bottom 3 and the septic tank cover 4 form the septic tank body, and the septic tank wall 2, the septic tank bottom 3 and the septic tank cover 4 form the septic tank body, which is a reinforced concrete structure with a thickness of 300mm. The lining thickness is 50mm with anti-corrosion tiles, the internal size of the tank is Φ4.6m×H5.0m, and the total volume is 83.0m 3 , the effective volume is 70m 3 .

[0044] The agitator 5 includes a motor, a support, a stirring shaft and a stirring paddle, the motor and the support are centered on the cover plate 4 of the purification tank, the stirring shaft and the stirring paddle are all located in the center of the purification tank body, and the mixer 5 T...

Embodiment 3

[0054] Such as figure 1 As shown, it includes liquid inlet pipe 1, purification tank tank wall 2, purification tank tank bottom 3, purification tank cover plate 4, mixer 5, exhaust pipe 7 and liquid outlet pipe 8, and the purification tank tank wall 2, purification tank The tank bottom 3 and the septic tank cover 4 form the septic tank body, and the septic tank wall 2, the septic tank bottom 3 and the septic tank cover 4 form the septic tank body, which is a reinforced concrete structure with a thickness of 300 mm. The lining thickness is 50mm with anti-corrosion tiles, the internal size of the tank is Φ4.6m×H5.0m, and the total volume is 83.0m 3 , the effective volume is 70m 3 .

[0055] The agitator 5 includes a motor, a support, a stirring shaft and a stirring paddle, the motor and the support are centered on the cover plate 4 of the purification tank, the stirring shaft and the stirring paddle are all located in the center of the purification tank body, and the mixer 5 ...

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Abstract

The invention discloses a method and purification tank for replacement and impurity removal of a zinc sulfate solution, and belongs to the technical field of zinc hydrometallurgy. The purification tank comprises a liquid inlet pipe, a purification tank wall, a purification tank bottom, a purification tank cover plate, a stirring machine, an exhaust pipe and a liquid outlet pipe and further comprises a filtering plate. The filtering plate is arranged in a purification tank body, below a stirring paddle and above the liquid outlet pipe. Filtering holes are formed in the filtering plate, and the filtering plate is provided with zinc sheets. The method for replacement and impurity removal of the zinc sulfate solution is achieved through the purification tank, and in other words, after the replacement and removal of copper, cadmium and cobalt are carried out on a to-be-processed zinc sulfate solution in the purification tank, the processed zinc sulfate solution and impurities are obtained. The copper, cadmium and cobalt impurity ions in the zinc sulfate solution can be effectively replaced, the number of the zinc sheets consumed for replacing the copper, cadmium and cobalt impurities can be greatly decreased, the replacement and impurity removal cost is reduced, high-purity copper, cadmium and cobalt residues can be obtained, and the environment of the production site can also be improved.

Description

technical field [0001] The invention relates to a method for replacing and removing impurities by zinc sulfate solution and a purification tank thereof, belonging to the technical field of zinc hydrometallurgy. Background technique [0002] In the production process of metal zinc ingot products, about 85% of the zinc ingot products adopt the hydrometallurgical zinc production process. There are five main technological processes in the main process of the traditional hydrometallurgy zinc production process, namely, zinc concentrate boiling roasting and flue gas acid production, zinc oxide leaching, zinc sulfate solution purification, zinc sulfate purification solution electrolysis and zinc flake casting, leaching slag Volatile treatment. In the process of zinc concentrate boiling roasting and flue gas acid production, the zinc sulfide in the concentrate is oxidized to zinc oxide and sulfur dioxide, sulfur dioxide enters the flue gas and after flue gas purification, sulfur di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B19/20C22B3/46
CPCY02P10/20
Inventor 陶政修覃宝桂杨茂峰韦克栋潘久华
Owner LAIBIN CHINA TIN SMELTING
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