Method for recycling leached and press-filtered residues generated in production of electrolytic metal manganese and manganese dioxide

A technology of electrolytic manganese metal and manganese dioxide, which is applied in application, silicon halide compound, fertilization device, etc., can solve the problems of large production area, high loss, long process route, etc., and achieve the effect of increasing the content of heavy metals

Inactive Publication Date: 2015-04-01
大新县信锰矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for efficient recycling of leached filter press residue produced by electrolysis of manganese metal and manganese dioxide. mat

Method used

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  • Method for recycling leached and press-filtered residues generated in production of electrolytic metal manganese and manganese dioxide
  • Method for recycling leached and press-filtered residues generated in production of electrolytic metal manganese and manganese dioxide
  • Method for recycling leached and press-filtered residues generated in production of electrolytic metal manganese and manganese dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Weigh 1000g of leached filter press residue and 8L of clean water, put them into a pulverizer to pulverize them into a pulp, and pass through a 100-mesh sieve. Finally, pass through a 100-mesh sieve and add the compound mixing tank together, start the mixer, and stir at a stirring speed of 65 rpm.

[0035] 2. Measure 98% H2SO4500ml, add it into the mixing tank while stirring, continue stirring for about 4 hours, measure the pH value to 1.5, and stop stirring.

[0036] 3. The filter press is used for solid-liquid separation, and the filter residue is put away for future use. The filtrate is put into the neutralization and hydrolysis mixing tank, and the mixer is started to stir at a stirring speed of 65 rpm.

[0037] 4. Slowly add NH4HCO3 powder while stirring, neutralize once, and test the pH value of the solution. When the pH is 4, stop adding NH4HCO3, continue stirring until no bubbles are generated, and stop stirring.

[0038] 5. Filtrate solid-liquid separation,...

Embodiment 2

[0053] 1. Weigh 1000g of the leached filter press residue, measure 2 / 3 of the water in the "eighth item" circulating bucket in the example (1), put it into a pulverizer to pulverize it into a pulp, and pass it through a 100-mesh sieve, and the undersieve enters The compound mixing tank, the sieved material enters the small grinder, adds the remaining water in the "eighth item" circulating bucket of the previous example to grind together, and then passes through the 100-mesh sieve and adds the compound mixing tank together, and starts the mixer to stir at a stirring speed of 65 rpm .

[0054] 2. Measure 98% H2SO4500ml, add it into the compound mixing tank while stirring, continue stirring for 4 hours, measure the pH value to 1.0, and stop stirring.

[0055] 3. Filtration solid-liquid separation: put the filter residue of the filter press for use, put the filtrate into the neutralization and hydrolysis mixing tank, start the mixer, and stir at a stirring speed of 65 rpm.

[005...

Embodiment 3

[0072] 1. Weigh 1000g of the leached filter press residue, measure 2 / 3 of the water in the circulating bucket of "Example (2) Item 8", put it into a pulverizer to pulverize it into a pulp, and pass it through a 100-mesh sieve, and the under-sieve enters In the compounding mixing tank, the supernatant and the remaining water in the "Example (2) Item 8" circulating water tank are added into a small grinder for grinding, and then all pass through a 100 mesh screen and added to the compounding mixing tank. Start the mixer to stir at a stirring speed of 65 rpm.

[0073] 2. Measure 98% H2SO4, add it into the compound mixing tank while stirring, continue stirring for 4 hours, measure the pH value to 0.5, and stop stirring.

[0074] 3. Filtrate solid-liquid separation, put the filter residue of the filter press for use, put the filtrate into the neutralization and hydrolysis mixing tank, and start the mixer to stir at a stirring speed of 65 rpm.

[0075] 4. Slowly add ammonia water c...

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PUM

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Abstract

The invention relates to a method for recycling leached and press-filtered residues generated in production of electrolytic metal manganese and manganese dioxide. The method comprises the specific following steps: (1) pre-processing filter residues; (2) adding acid and leaching; (3) carrying out filtration and solid-liquid separation on ore pulp; (4) recovering hematite powder; (5) recovering manganese carbonate concentrate; (6) preparing a base material for a nitrogen/phosphorus compound fertilizer; and (7) preparing sodium fluosilicate. By the method, hematite powder, manganese carbonate concentrate, sodium fluosilicate and the base material for the nitrogen/phosphorus compound fertilizer can be recovered from the leached and press-filtered residues, the process is simple and easy to industrialize and meanwhile, the content of the heavy metals is in full compliance with national standards, further treated wastewater and waste residues are free of harmful ingredients such as heavy metals and thus the pressure on the environment is reduced and the method has great promotional values.

Description

technical field [0001] The invention belongs to the comprehensive utilization technology of waste slag, in particular to a method for making various chemical products by recycling leached filter press residue in the production of electrolytic manganese. Background technique [0002] As one of the important strategic resources of the national economy, manganese has also been regarded as a national strategic resource in my country during the "Eleventh Five-Year Plan" period. At present, manganese is mainly obtained through electrolysis and reduction methods, and the production of manganese by electrolysis accounts for more than 95% of the total production of pure manganese. The production enterprises of electrolytic manganese metal use rhodochrosite and pyrolusite as raw materials, which are leached by sulfuric acid → added Oxidizing ferrous iron by oxidant → adding ammonia water to neutralize and hydrolyze to remove iron → leaching filter press (primary press filter residue) ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B47/00C01B33/10C05G1/00
Inventor 赵阳臣
Owner 大新县信锰矿业有限公司
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