Method for producing electrolytic manganese metal and active manganese dioxide from anode slime produced by electrolytic manganese metal

A technology of active manganese dioxide and electrolytic metal manganese, applied in the direction of manganese oxide/manganese hydroxide, improvement of process efficiency, instruments, etc., can solve the problems of unable to solve the problem of sulfuric acid filter press balance, high cost, large consumption, etc., to achieve Increase revenue, improve recovery rate, and achieve the effect of environmentally friendly use

Active Publication Date: 2021-09-24
庞炼红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of auxiliary materials such as concentrated sulfuric acid and oxalic acid used in this method is large, the cost is high, and the balance problem in the process of sulfuric acid pressure filtration and electrolysis cannot be solved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A method for producing electrolytic metal manganese and manganese dioxide from anode slime produced by electrolytic manganese metal, the specific steps are:

[0053] A. Grinding the anode slime produced in the electrolytic manganese process into 80 mesh powder, slurrying (the degree of slurrying is to make the divalent manganese ion content in the solution after slurrying be 25g / L), add ammonia water to adjust the pH of the solution to 9. Separation of solid and liquid after press filtration, washing with water to obtain press filter blocks and washing water, and recycling of washing water;

[0054] B. extract the gas reclaiming selenium after the pressure filter block is calcined at 800 DEG C of temperatures, then use the anolyte of the electrolytic metal manganese of 55 DEG C for the solid after the calcining (consumption is to make the content of divalent manganese ion in the solution after the reaction be 25g / L) solid-liquid separation after leaching and press filtra...

Embodiment 2

[0061] A method for producing electrolytic metal manganese and manganese dioxide from anode slime produced by electrolytic manganese metal, the specific steps are:

[0062] A. The anode slime produced in the electrolytic manganese metal process is ground into 100 mesh powder, slurry (the degree of slurry is to make the divalent manganese ion content in the solution after slurry is 30g / L), add ammonia water to adjust the pH of the solution to 10. Separation of solid and liquid after press filtration, washing with water to obtain press filter block and washing water, and recycling of washing water;

[0063] B. after the pressure filter block is calcined at a temperature of 750 DEG C, the gas is extracted to reclaim selenium, and then the calcined solid is used with the anolyte of 60 DEG C of electrolytic metal manganese (consumption is to make the content of divalent manganese ions in the solution after the reaction be 40g / L) solid-liquid separation after leaching and press fil...

Embodiment 3

[0070] A method for producing electrolytic metal manganese and manganese dioxide from anode slime produced by electrolytic manganese metal, the specific steps are:

[0071] A. the anode slime produced in the electrolytic manganese process is ground into 90 mesh powder, slurry (the degree of slurry is to make the divalent manganese ion content in the solution after slurry is 40g / L), add ammonia water to adjust the pH of the solution to 9.5, solid-liquid separation after press filtration, washing with water to obtain press filter block and washing water, washing water recycling;

[0072] B. extract the gas reclaiming selenium after the pressure filter block is calcined at 540 DEG C of temperature, then the anolyte (consumption is to make the content of the divalent manganese ion in the solution after the reaction be 32g / - L) solid-liquid separation after leaching and press filtration to obtain manganese dioxide press filter block and manganese sulfate solution;

[0073] C. Mang...

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PUM

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Abstract

The invention belongs to the technical field of electrolytic production and recovery of manganese by solution electrolysis, and specifically relates to a method for producing electrolytic metal manganese and active manganese dioxide from anode slime produced by electrolytic metal manganese, comprising the following steps: A. Slurry the anode, add ammonia water to adjust the pH of the solution to 9-10, separate the solid and liquid after press filtration, wash with water to obtain the press filter block and washing water, and recycle the washing water; B. use the anode of electrolytic manganese metal after the press filter block is calcined Liquid leaching and pressure filtration are followed by solid-liquid separation to obtain manganese dioxide press filter block and manganese sulfate solution; C. manganese dioxide press filter block acid leaching and press filtration to obtain an aqueous solution of manganese dioxide press filter block and lead Washing the block with water, drying, and grinding to obtain active manganese dioxide; D. removing impurities from the manganese sulfate solution and standing still to obtain an electrolyte, electrolyzing the electrolyte, and performing subsequent treatment to obtain electrolytic manganese metal. The method realizes the recycling and reuse of resources, and improves the income at the same time; it is safe, environment-friendly, and pollution-free.

Description

technical field [0001] The invention belongs to the technical field of electrolytic production and recovery of manganese by a solution electrolysis method, and in particular relates to a method for producing electrolytic metal manganese and manganese dioxide from anode slime produced by electrolytic metal manganese. Background technique [0002] The anode slag produced in the production process of electrolytic manganese metal is also called anode slime, which contains a relatively high content of manganese dioxide, ammonium sulfate, sulfuric acid, manganese sulfate, lead and selenium. Through the investigation of the current industrial production of electrolytic manganese metal in my country, it is found that the manganese content in the anode slime produced by electrolytic manganese metal accounts for about 7-10% of the total manganese input. [0003] In the current production of electrolytic manganese metal, the anode slime is not recycled and reused, but sold to middlemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/10C01G45/02C22B47/00C22B7/00C01B19/02C22B13/00
CPCC01B19/02C01G45/02C22B7/007C22B13/045C22B47/00C25C1/10Y02P10/20
Inventor 庞炼红唐诗祝张雪莲庞列培
Owner 庞炼红
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