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Method for circularly producing mangano-manganic oxide by manganous sulfate

A technology of manganese tetroxide and manganese sulfate, applied in manganese oxide/manganese hydroxide and other directions, can solve the problems of high production cost, low technical content and low profit, and achieve the effect of low cost and high product purity

Inactive Publication Date: 2011-05-18
湖南昊宏新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process is mature, simple, and less investment, but the technical content is low, the production cost is high, the profit is low, and the impurity content including selenium is relatively high, which affects the grade of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The mixed gas of sulfur dioxide and sulfur trioxide produced by high-temperature calcination of 24.7kg of manganese sulfate is dried with concentrated sulfuric acid, mixed with air and compressed, and passed into a mixed slurry composed of pyrolusite, manganese carbonate and water. The mixed pulp of pyrolusite and manganese carbonate is prepared as follows: 10kg pyrolusite (containing 30% manganese) and 13.6kg manganese carbonate (containing 44% manganese) are mixed and ground to 120 mesh, then stirred with water to form a solid-to-liquid ratio of 1: 4, the mixed gas of sulfur dioxide and sulfur trioxide is pressed in from the bottom of the mixing tank, and is dispersed into uniform small bubbles through the stainless steel sieve plate to enter the pulp, and the pulp is sprayed down from the top of the tower. The whole process was continuously stirred, the leaching time was 7 hours, and the leaching temperature was 85°C. Sodium thiocarbamate, ammonium sulfide and ammoni...

Embodiment 2

[0014] The mixed gas of sulfur dioxide and sulfur trioxide produced by high-temperature calcination of 24.7kg of manganese sulfate is dried with concentrated sulfuric acid, mixed with air and compressed, and then passed into the mixed slurry of manganese dioxide, manganese carbonate and water. Manganese dioxide (containing 56% of manganese) and manganese carbonate (containing 44% of manganese) mixed pulp is prepared as follows: 4.2kg of manganese dioxide and 13.6kg of manganese carbonate are mixed and ground to 120 mesh, then added with water and stirred to a solid-to-liquid ratio of 1:5 pulp. The mixed gas of sulfur dioxide and sulfur trioxide is pressed in from the bottom of the mixing tank, and dispersed into uniform small bubbles through the stainless steel sieve plate, and enters the slurry, and the slurry is sprayed from the top of the tower. The whole process was continuously stirred, the leaching time was 7 hours, and the leaching temperature was 85°C. Sodium formamat...

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Abstract

The invention relates to a method for circularly producing mangano-manganic oxide by manganous sulfate, which fulfills the aim of circularly producing the mangano-manganic oxide by the manganous sulfate by absorbing a mixed gas of sulfur dioxide and sulfur trioxide generated by calcining the manganous sulfate at a high temperature by mixed slurry which is formed by pyrolusite (or manganese dioxide), manganese carbonate and water. The method for producing the mangano-manganic oxide has the advantages of low cost, high product purity, no pollution and the like.

Description

technical field [0001] The invention relates to a method for producing trimanganese tetraoxide in a manganese sulfate cycle. Background technique [0002] The existing production of manganese tetraoxide basically adopts the electrolytic metal manganese powder suspension oxidation method, that is, the electrolytic metal manganese flakes are used as raw materials, and the metal manganese flakes are first pulverized into a suspension, and then air or oxygen is used as an oxidant. Trimanganese tetraoxide was prepared under the condition of certain temperature and adding ammonium salt. Although the method is mature, simple and requires less investment, it has low technical content, high production cost, low profit, and high impurity content including selenium, which affects the grade of the product. Manganese sulfate is a suitable raw material for preparing trimanganese tetraoxide, but the production of trimanganese tetraoxide with manganese sulfate needs to solve the environmen...

Claims

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Application Information

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IPC IPC(8): C01G45/02
Inventor 吴显明陈上麻明友张运河何则强赵建文刘建本陈善文
Owner 湖南昊宏新材料科技有限公司
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