Method for producing high purity manganous-manganic oxide with little iron and chromium

A high-purity technology of trimanganese tetraoxide, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of inability to reach iron and limit the performance of manganese-zinc ferrite, and achieve the effect of improving product performance

Inactive Publication Date: 2011-11-23
伍宏斌
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AI Technical Summary

Problems solved by technology

[0002] With the development of electronic technology, the requirements for the purity of high-purity manganese tetraoxide, the raw material for the production of manganese-zinc ferrite, are getting higher and higher. The lower the content of iron and chromium in high-purity manganese tetraoxide, the better. Du...

Method used

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Embodiment

[0006] Embodiment: with Mn content greater than 99.7%, S content is less than 0.04%, C content is less than 0.04%, Fe content is less than 0.018%, Si content is less than 0.005%, Cr content is less than 0.0005%, Mg content is less than 160ppm, Ca content is less than 100ppm, Electrolytic manganese metal flakes with Na content less than 15ppm and K content less than 15ppm are ground into electrolytic manganese metal powder with a roller mill, and the pressure roller of the roller mill is made of pressure-resistant ceramics. Sieve, sieve out the electrolytic manganese metal powder with a fineness of -140 mesh, and put the electrolytic manganese metal powder with a fineness of -140 mesh or -160 mesh and water into the reaction tank at a ratio of 1:6 for reaction. The reaction tank is made of non-ferrous, Chromium-based anti-corrosion and wear-resistant materials such as redox resin, rubber, titanium, etc. are used as lining, and the stirring slurry of the reaction tank is wrapped ...

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PUM

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Abstract

High purity electrolytic metal manganese sheet is used as a raw material, and a non iron or chromium base pressure-resistant and wear-resistant material, such as a pressure-resistant ceramic is used as a pressure roller of a roller mill. The electrolytic metal manganese sheet is fragmented into electrolytic metal manganese powder, sieved through a copper screen to obtain electrolytic metal manganese powder with a fineness of -140 mesh or -160 mesh, and put into a reaction tank together with water in a ratio of 1:6 for reaction. The reaction tank employs a non iron or chromium base anti-corrosion and wear-resistant material, such as epoxy resin, rubber and titanium, etc., as an inner liner non iron or chromium base anti-corrosion and wear-resistant material, such as epoxy resin, rubber and titanium, etc., and a stirring slurry of the reaction tank is coated with a non iron or chromium base anti-corrosion and wear-resistant material, such as epoxy resin, rubber and titanium, etc. after the reaction, high purity manganous-manganic oxide with little iron and chromium can be obtained, wherein an iron content is not greater than 0.02%, and a chromium content not greater than 0.001%.

Description

Technical field: [0001] The invention belongs to the technical field of chemical production, and in particular relates to a method for producing high-purity trimanganese tetraoxide with low iron and low chromium. Background technique: [0002] With the development of electronic technology, the requirements for the purity of high-purity manganese tetraoxide, the raw material for the production of manganese-zinc ferrite, are getting higher and higher. The lower the content of iron and chromium in high-purity manganese tetraoxide, the better. Due to the limitation of process equipment, at present, the performance index of high-purity manganese tetraoxide with low iron and low chromium is 0.04% iron and 0.02% chromium, which cannot reach iron less than 0.02% and chromium less than 0.001%, which limits manganese, zinc and iron oxide. Improvement of body performance. Invention content: [0003] In order to overcome the deficiency of high iron and chromium content in high-purity...

Claims

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Application Information

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IPC IPC(8): C01G45/02
Inventor 伍宏斌
Owner 伍宏斌
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