Method for preparing manganic manganous oxide

A technology of manganese tetroxide, heating and oxidation, applied in the direction of manganese oxide/hydroxide, etc., can solve the problems of loss, easy to raise ash manganese compounds, etc.

Inactive Publication Date: 2008-05-14
李宏亮
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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 improve the roasting process of manganese carbonate to prepare manganese tetraoxide, and to solve the problem that

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add alkali metal carbonate (hydrogen) or ammonium (hydrogen) carbonate to the manganese sulfate solution, and the obtained manganese carbonate is oxidized by air at 300°C for 10 hours to obtain a manganese mixture product. The manganese mixture was calcined at 900°C for 10 minutes to obtain trimanganese tetraoxide.

Embodiment 2

[0012] Add alkali metal carbonate (hydrogen) or ammonium (hydrogen) carbonate to the manganese sulfate solution, and the obtained manganese carbonate is oxidized by air at 380°C for 5 hours to obtain a mixture product of manganese. The manganese mixture was calcined at 980°C for 1 minute to obtain trimanganese tetraoxide.

Embodiment 3

[0014] Add alkali metal carbonate (hydrogen) or ammonium (hydrogen) carbonate to the manganese sulfate solution, and the obtained manganese carbonate is oxidized by air at 450°C for 7 hours to obtain a mixture product of manganese. The manganese mixture was calcined at 1100°C for 60 minutes to obtain trimanganese tetraoxide.

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PUM

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Abstract

The invention relates to a preparation method of mangano-manganic oxide, belonging to the technical field of inorganic non-metallic material, wherein the purified manganese ore extract, manganese sulfate solution, is used as raw material; carbonate (bicarbonate) is used as precipitating agent; the manganese ion in the manganese sulfate solution is precipitated into manganese carbonate sediment, which is then thermal oxidized and decomposed into a manganese admixture containing manganese dioxide, manganese monoxide and manganese carbonate with air or oxygen at a temperature of 120 DEG C to 800 DEG C, and then calcined into mangano-manganic oxide at a temperature of 800 DEG C to 1200 DEG C. The invention has the advantages that the dust cloud of manganese admixture is practically avoided during the process of preparation; the recovery rate of manganese is high; the obtained mangano-manganic oxide has dramatic activity and the cost is low.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, in particular to a method for preparing trimanganese tetraoxide from a mixture of manganese obtained through special thermal decomposition of manganese carbonate. Background technique [0002] Trimanganese tetraoxide (Mn 3 o 4 ) is one of the main raw materials for the preparation of soft magnetic manganese zinc ferrite, other raw materials are Fe 2 o 3 and ZnO. [0003] Manganese-zinc ferrite is a high-performance magnetic material, widely used in high-tech industries such as electrical appliances, communications, and information, for air defense missile systems, variable polarization phased array radar antennas, early warning aircraft antennas, and solid-state phased arrays Components, single-pulse precision tracking and measurement radar and other military products. Used in the manufacture of various magnetic cores, information storage materials, magnetic heads, etc. The p...

Claims

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Application Information

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IPC IPC(8): C01G45/02
Inventor 邹兴
Owner 李宏亮
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