Method for purifying zinc electrodeposition anode mud to prepare manganese sulfate and cell grade manganese dioxide

A manganese dioxide and anode slime technology, applied in the field of metallurgy, can solve the problems of loss of smelting energy consumption of non-ferrous metals with slag, increase of slag amount in lead smelting smelting system, and high manganese ion in system solution, so as to achieve superior cycle stability and product quality. Stable, simple process effect

Inactive Publication Date: 2019-03-22
HUNAN RES INST FOR NONFERROUS METALS
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Problems solved by technology

[0002] In the metallurgical industry, the electrode process of the hydrometallurgy process will produce a large amount of zinc electrodeposition anode slime with manganese dioxide as the main component. The zinc electrowinning anode slime returns to the zinc leaching process to remove iron, lead and silver follow into the leaching slag, the leaching slag is volatilized and roasted in a rotary kiln to recover the zinc and part of the lead, and the silver enters the kiln slag and is lost, and the leaching slag is also processed Flotation, but lower silver yield
However, in the actual production process, i

Method used

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  • Method for purifying zinc electrodeposition anode mud to prepare manganese sulfate and cell grade manganese dioxide
  • Method for purifying zinc electrodeposition anode mud to prepare manganese sulfate and cell grade manganese dioxide
  • Method for purifying zinc electrodeposition anode mud to prepare manganese sulfate and cell grade manganese dioxide

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[0030] Example 1:

[0031] A method for purifying and preparing manganese sulfate from zinc electrodeposition anode slime, comprising the following steps:

[0032] (1) Perform ball milling on the zinc electrodeposition anode slime (its composition content is shown in Table 1), then weigh 1200g of zinc electrodeposition anode slime after ball milling and 3600mL of deionized water, wash zinc under mechanical stirring conditions, and filter Obtain the first section of zinc washing slag and the first section of zinc washing solution; the first section of zinc washing solution is carried out for resource recycling, and 3600mL deionized water is added to the first section of zinc washing slag to carry out the second section of zinc washing, filtered and dried to obtain Zinc washing slag;

[0033] (2) Take 500g of zinc washing slag and add it to 2500mL of deionized water, and feed SO with a gas flow rate of 1L / min and an excess coefficient of 1.4 times 2 Reductively leaching mangan...

Example Embodiment

[0062] Example 2:

[0063] A method for purifying and preparing manganese sulfate from zinc electrodeposition anode slime, comprising the following steps:

[0064] (1) Carry out ball milling of the zinc electrodeposition anode slime, then weigh 1200g of the zinc electrodeposition anode slime pulverized by the ball mill and mix it with the second-stage zinc washing solution in 3600mL of Example 1, wash zinc under mechanical stirring conditions, and filter Finally, the first section of zinc washing slag and the first section of zinc washing solution are obtained; the first section of zinc washing solution is used for resource recycling, and 3600mL deionized water is added to the first section of zinc washing slag to carry out the second section of zinc washing, filtered and dried Get zinc washing slag;

[0065] (2) Take 500g of zinc washing slag and add it to 2500mL of deionized water, and feed SO with a gas flow rate of 1L / min and an excess coefficient of 1.4 times 2 Reductiv...

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Abstract

The invention discloses a method for purifying zinc electrodeposition anode mud to prepare manganese sulfate and cell grade manganese dioxide. The method comprises the following steps: performing ballmilling on zinc electrodeposition anode mud, performing secondary countercurrent zinc washing, performing reduction leaching on manganese, and removing impurities, thereby obtaining the manganese sulfate solution, wherein the process of performing reduction leaching on manganese comprises the following steps: adding zinc washing slag obtained by zinc washing into deionized water, and introducingreduction gas to perform reduction leaching on manganese, thereby obtaining the leaching liquor. According to the method disclosed by the invention, the operation of each process is very simple and convenient, the requirement on equipment is not harsh, and application to large-scale production is facilitated. According to the method disclosed by the invention, various valuable metal resources in the zinc electrodeposition anode mud can be recycled, lead and silver enter the slag to be fed into a lead smelting furnace so as to recover the lead and silver, and the manganese serves as a supercapacitor electrode material with high additional value in the form of nano-scale alpha-MnO2, so as to be recycled.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for purifying and preparing manganese sulfate and battery-grade nano manganese dioxide from zinc electrodeposition anode slime. Background technique [0002] In the metallurgical industry, the electrode process of the hydrometallurgy process will produce a large amount of zinc electrodeposition anode slime with manganese dioxide as the main component. The zinc electrowinning anode slime returns to the zinc leaching process to remove iron, lead and silver follow into the leaching slag, the leaching slag is volatilized and roasted in a rotary kiln to recover the zinc and part of the lead, and the silver enters the kiln slag and is lost, and the leaching slag is also processed Flotation, but the silver yield is lower. However, in the actual production process, it is found that all the anode slime has been returned to the leaching process in excess, resulting in high m...

Claims

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Application Information

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IPC IPC(8): C01G45/10C01G45/02B82Y40/00H01G11/46H01G11/86
CPCB82Y40/00C01G45/02C01G45/10C01P2004/32C01P2004/64C01P2006/12C01P2006/40C01P2006/80H01G11/46H01G11/86Y02E60/13
Inventor 陈海清郭志豪苏莎唐文奇
Owner HUNAN RES INST FOR NONFERROUS METALS
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