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A method for producing electrolytic manganese dioxide by using manganese tailings and titanium white waste sulfuric acid

A technology of electrolyzing manganese dioxide and manganese tailings, which is applied in the preparation of manganese sulfate and manganese compounds, manganese oxide/manganese hydroxide, etc., which can solve the problems of high impurity content, no recycling value, high recycling cost and complicated process , to achieve the effect of environmental protection and comprehensive utilization of resources

Active Publication Date: 2020-11-24
宣城市安工大工业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first treatment method will produce a large amount of sulfuric acid slag. Due to the high content of impurities and no recycling value, these waste residues can only be discarded and stored, and occupy a large amount of land resources.
The second treatment method is complicated in process and high in recycling cost, so not all titanium dioxide manufacturers are qualified to apply it
[0006] However, the existing process of using manganese tailings and titanium white waste sulfuric acid to produce electrolytic manganese dioxide has the disadvantages of low recovery rate and easy secondary pollution

Method used

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  • A method for producing electrolytic manganese dioxide by using manganese tailings and titanium white waste sulfuric acid

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Embodiment 1

[0030] A method for producing electrolytic manganese dioxide by utilizing manganese tailings and titanium white waste sulfuric acid, comprising the following steps:

[0031] a) placing the manganese tailings in a ball mill for wet grinding with water added, the manganese tailings material after the wet grinding is passed through a 200-mesh sieve, so that the total mass of the material under the sieve is 96% of the total mass of the material;

[0032] Among them, the manganese tailings include the following components in mass percentage: Mn6.0%, Fe7.5%, SiO 2 60.0%, CaO0.3%, Al 2 o 3 4.05%, MgO1.55%;

[0033] b) After pre-mixing the manganese tailings material that has been ball milled with ferrous sulfate and titanium white waste sulfuric acid, add it to a strong mixer for stirring and dissolving for 3 hours, the reaction temperature is 60°C, and the first filtrate and the first filter residue are obtained by solid-liquid separation ; The first filter residue is diatomite a...

Embodiment 2

[0039] A method for producing electrolytic manganese dioxide by utilizing manganese tailings and titanium white waste sulfuric acid, comprising the following steps:

[0040] a) placing the manganese tailings in a ball mill for wet grinding with water added, the manganese tailings material after the wet grinding is passed through a 210 mesh sieve, so that the total mass of the undersize is 97% of the total mass of the material;

[0041] Among them, the manganese tailings include the following components in mass percentage: Mn2.5%, Fe3.0%, SiO 2 35.0%, CaO5.0%, Al 2 o 3 15.05%, MgO0.30%;

[0042] b) After pre-mixing the manganese tailings material that has been ball milled with ferrous sulfate and titanium white waste sulfuric acid, add it to a strong mixer for stirring and dissolving for 1 hour, the reaction temperature is 90°C, and the first filtrate and the first filter residue are obtained by solid-liquid separation ; The first filter residue is diatomite after countercur...

Embodiment 3

[0048] A method for producing electrolytic manganese dioxide by utilizing manganese tailings and titanium white waste sulfuric acid, comprising the following steps:

[0049] a) placing the manganese tailings in a ball mill for wet grinding with water added, the manganese tailings material after the wet grinding is passed through a 200-mesh sieve, so that the total mass of the material under the sieve is 96% of the total mass of the material;

[0050] Among them, the manganese tailings include the following components in mass percentage: Mn22.5%, Fe3.0%, SiO 2 60.0%, CaO0.3%, Al 2 o 3 15.05%, MgO0.3%;

[0051] b) After pre-mixing the manganese tailings material that has been ball milled with ferrous sulfate and titanium white waste sulfuric acid, add it to a strong mixer for stirring and dissolving for 3 hours, the reaction temperature is 60°C, and the first filtrate and the first filter residue are obtained by solid-liquid separation ; The first filter residue is diatomite ...

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Abstract

The invention discloses a method for producing electrolytic manganese dioxide from manganese gangue and titanium dioxide waste sulfuric acid. The method particularly includes carrying out reduction leaching and fine grinding on the manganese gangue by the aid of the titanium dioxide waste sulfuric acid; carrying out solid-liquid separation to obtain a white filter residue used as diatomaceous earth; extracting leach liquid by di-(2-ethylhexyl)phosphate extraction agents; carrying out saponification by light burning powder (or magnesium oxide); removing impurities and then carrying out electrolysis to obtain the electrolytic manganese dioxide, iron black and magnesium sulfate. The iron black and the magnesium sulfate are byproducts. The method has the advantages that the manganese gangue and titanium dioxide waste acid can be synergistically disposed by the aid of the method, accordingly, the problems in the aspect of ecological safety due to manganese gangue accumulation can be solvedby the aid of the method, a brand new way can be provided to utilizing the titanium dioxide waste acid, and the comprehensive utilization additional values of the manganese gangue and the titanium dioxide waste acid can be increased; the electrolytic manganese dioxide prepared by the aid of the method is high in quality and low in production cost, processes for the electrolytic manganese dioxide are simple, the manganese gangue and the titanium dioxide waste sulfuric acid can be completely recycled, secondary pollution can be prevented, wastewater is free of discharge, and the method is favorable for protecting environments and comprehensively utilizing resources.

Description

technical field [0001] The invention relates to the technical field of recycling non-ferrous metal tailings, in particular to a method for producing electrolytic manganese dioxide by using manganese tailings and titanium white waste sulfuric acid. Background technique [0002] In modern industry, manganese and its compounds are used in various fields of national economy. Among them, the iron and steel industry is the most important field. The amount of manganese used accounts for 90% to 95%. It is mainly used as a deoxidizer and desulfurizer in the process of ironmaking and steelmaking, and used to make alloys. The remaining 5% to 10% of manganese is used in other industrial fields, such as chemical industry (manufacturing various manganese-containing salts), light industry (used in batteries, matches, printing paint, soap making, etc.), building materials industry (glass and ceramics) colorant and fading agent), defense industry, electronics industry, as well as environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02C01G49/08C01F5/40C01G45/10
CPCC01F5/40C01G45/003C01G45/02C01G45/10C01G49/0009C01G49/08
Inventor 王昭然李灿华于巧娣汤瑶唐蕊
Owner 宣城市安工大工业技术研究院有限公司
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