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Recycling method of anode mud produced by electrolytic manganese metal

A technology of electrolytic manganese metal and anode slime, which is applied to the improvement of process efficiency, photography technology, element selenium/tellurium, etc., can solve the problems of inability to handle, and achieve the effect of realizing environmental protection, reducing production costs, and reducing environmental pollution

Inactive Publication Date: 2020-01-31
庞炼红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have only dealt with lead, selenium or manganese unilaterally, and cannot simultaneously process lead, selenium and manganese.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The method for recycling the anode slime produced by electrolytic manganese metal includes the following steps:

[0045] A. Grind the anode slime into 80 mesh powder, then mix it with water so that the content of divalent manganese ions in the mixed solution is 40g / L, and then introduce sulfur dioxide (the amount of sulfur dioxide introduced is the same as that of divalent manganese ions in the solution after slurrying). The molar ratio of manganese ions is 1.2:1), stirring and heating to 40°C during the introduction of sulfur dioxide, adding manganese carbonate solution to adjust the pH to 2.5, removing impurities (that is, using manganese carbonate solution to adjust the pH of the solution to 6.0), Press filtration to obtain a solution containing manganese sulfate and manganese dithionite, collect the solids after press filtration, then place the press filter block in ammonium acetate solution, press filter and separate solid and liquid, add sulfuric acid solution to t...

Embodiment 2

[0052] The method for recycling the anode slime produced by electrolytic manganese metal includes the following steps:

[0053] A. Grind the anode slime into 100 mesh powder, and then mix it with water so that the content of divalent manganese ions in the solution after mixing is 30g / , then add ammonium sulfite (the amount of ammonium sulfite is the same as that of divalent manganese ions in the solution after slurrying). The molar ratio of manganese ions is 1.4:1), then add concentrated sulfuric acid (the amount of concentrated sulfuric acid is 1.4:1 with the molar ratio of divalent manganese ions in the slurry solution), stir and heat during the process of adding ammonium sulfite to 90°C, add manganese hydroxide solution to adjust the pH to 2.7, remove impurities (i.e. adjust the pH of the solution to 6.4 with manganese hydroxide solution), press filter to obtain a solution containing manganese sulfate and manganese dithionite, collect and press filter After the solid, then ...

Embodiment 3

[0060] The method for recycling the anode slime produced by electrolytic manganese metal includes the following steps:

[0061] A. Grind the anode slime into 90-mesh powder, then mix it with water so that the content of divalent manganese ions in the mixed solution is 25g / L, and then introduce sulfur dioxide (the amount of sulfur dioxide introduced is the same as that of divalent manganese ions in the solution after slurrying). The molar ratio of manganese ions is 1.3:1), stirring and heating to 60°C during the introduction of sulfur dioxide, adding manganese hydroxide solution to adjust the pH to 3, removing impurities (that is, the ammonia solution adjusts the pH of the solution to 6.2), pressing Filter to obtain a solution containing manganese sulfate and manganese dithionate, collect the solid after press filtration, then place the press filter block in ammonium acetate solution, press filter and separate solid and liquid, add sulfuric acid solution to the liquid, and filte...

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PUM

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Abstract

The invention relates to a recycling method of anode mud produced by electrolytic manganese metal. The method comprises the following steps that A, the anode mud is ground into 80-100 mesh powder, andis subjected to slurrying, then sulfur dioxide is introduced, stirring, and heating are conducted during a sulfur dioxide introduction process, or ammonium sulfite is added after slurrying, then concentrated sulfuric acid is added, the pH is adjusted to 2.5-3, impurity removing and pressure filtration are conducted, and generated filter residue lead sulfate is recovered to obtain a solution containing manganese sulfate and manganese dioxide; B, the solution obtained in the step A is cooled to 38-42 DEG C, ammonia water is added, solid-liquid separation is conducted after pressure filtration to obtain a manganese hydroxide pressure filtration block and an ammonium sulfate solution; and C, the manganese hydroxide pressure filtration block is subjected to leaching by using an anode liquid subjected to anode mud filtration, impurity removal and standing, a filtrate after pressure filtration is subjected to electrolysis, then later-procedure treatment is conducted to obtain electrolytic metal manganese, and the anode mud is used in a slurrying procedure of the step A. According to the method, recycling of resources is achieved, and meanwhile, benefits are improved, the method is safe,environment-friendly and pollution-free, the obtained metal manganese is high in purity, and the use quantities of auxiliary materials such as sulfuric acid, ammonium sulfate, ammonia water, seleniumdioxide are greatly reduced.

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 recycling method for 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 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, resulting in a great waste of resources. In the current production of electrolytic manganese metal, the anode slime is not recycled and reused, but sold to middlemen at a low price, and then ...

Claims

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Application Information

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IPC IPC(8): C25C1/10C22B7/00C22B13/00C01B19/02C22B47/00
CPCC01B19/02C22B7/007C22B13/04C22B47/00C25C1/10Y02P10/20
Inventor 庞炼红唐诗祝张雪莲庞列培
Owner 庞炼红
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