Method for preparing manganese sulfate from waste byproducts obtained in the production of titanium white and low-grade pyrolusite

A technology of titanium dioxide and pyrolusite, which is applied to the removal of manganese sulfate and solid waste, can solve the problems of high energy consumption and long reaction time, and achieve the effect of low energy consumption and cost saving

Inactive Publication Date: 2010-12-22
蓝星安迪苏股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The energy consumed in the reaction process is about 1 / 3 of the total energy consumption consumed in the whole production of manganese sulfate monohydrate, and the reaction time is long, so this method also needs higher energy consumption

Method used

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  • Method for preparing manganese sulfate from waste byproducts obtained in the production of titanium white and low-grade pyrolusite
  • Method for preparing manganese sulfate from waste byproducts obtained in the production of titanium white and low-grade pyrolusite

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Grind low-grade pyrolusite with a manganese content of 19.3% to less than 100 meshes, weigh 10kg, and prepare manganese ore slurry according to the weight ratio of pyrolusite and titanium dioxide produced wastewater at 1:1.5; then weigh it according to the weight ratio. Get the waste sulfuric acid 19.56kg that the by-product ferrous sulfate heptahydrate of titanium dioxide production produces 19.5kg and titanium dioxide, add the waste water that titanium dioxide produces ferrous sulfate heptahydrate is dissolved, is mixed with ferrous sulfate mixed solution; Add manganese ore pulp and a quarter of ferrous sulfate mixed solution into the reaction kettle, stir for 35 minutes, then control the stirring speed to 200 rpm, and control the reaction temperature at 35°C, quickly mix the remaining manganese ore pulp and ferrous sulfate At the same time, the mixed solution is quickly sent to the reaction kettle to continue stirring and reacting for 3 hours; after the reaction is co...

Embodiment 2

[0042] Grind the low-grade pyrolusite with a manganese content of 18.7% to less than 100 meshes, weigh 10kg, prepare manganese ore slurry according to the weight ratio of pyrolusite and titanium dioxide produced wastewater at 1:1, and then weigh it according to the weight ratio. Get the waste sulfuric acid 18.67kg that the by-product ferrous sulfate heptahydrate produced by titanium dioxide produces 18.8kg and titanium dioxide, add the waste water that titanium dioxide produces ferrous sulfate heptahydrate is dissolved, be mixed with ferrous sulfate mixed solution; Add the manganese ore slurry and 1 / 4 of the ferrous sulfate mixed solution into the reaction kettle, stir for 30 minutes, then control the stirring speed to 100 rpm, and control the reaction temperature at 40°C, quickly mix the remaining manganese ore slurry and ferrous sulfate The mixed solution is quickly sent to the reaction kettle to continue stirring and reacting for 2 hours; after the reaction is completed, the...

Embodiment 3

[0044]Grind the low-grade pyrolusite with a manganese content of 18.35% to less than 100 meshes, weigh 10kg, prepare manganese ore slurry according to the weight ratio of pyrolusite and titanium dioxide wastewater production at 1:0.8, and then weigh it according to the weight ratio. Get the waste sulfuric acid 18.56kg that the by-product ferrous sulfate heptahydrate of titanium dioxide production produces 18.5kg and titanium dioxide, add titanium dioxide production waste water ferrous sulfate heptahydrate is dissolved, be mixed with ferrous sulfate mixed solution; Add the manganese ore slurry and a quarter of the ferrous sulfate mixed solution into the reaction kettle, stir for 25 minutes, then control the stirring speed to 70 rpm, control the reaction temperature at 26°C, and quickly put the remaining manganese ore slurry and ferrous sulfate solution At the same time, it is quickly sent to the reaction kettle to continue stirring and reacting for 4 hours; after the reaction is...

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Abstract

The invention discloses a method for preparing manganese sulfate from waste water, waste sulphuric acid and a byproduct, namely iron vitriol obtained in the production of titanium white and low-grade pyrolusite or medium-grade pyrolusite with content of 10 to 20 percent, which has the advantages of low energy consumption, low cost and simple operation. The method comprises the following processes of grinding ore to prepare slurry, preparing reducing fluid, performing manganese leaching reaction, removing impurities, performing concentrative crystallization, performing centrifugal separation, drying, pulverizing and sieving and packaging, wherein the manganese leaching reaction is performed at the temperature of between 20 and 45 DEG C without vapor heating and pressurizing, so the method has the advantages of the comprehensively utilizing the iron vitriol, the waste water and the waste sulphuric acid during the production of the titanium white, turning waste into wealth, along with the leaching rate of manganese of more than 98 percent, the yield of the manganese of more than 85 percent, and good double benefits of environmental protection and circular economy development.

Description

technical field [0001] The invention belongs to the technical field of pyrolusite extraction and processing, and relates to a method for producing manganese sulfate monohydrate, in particular to a method for producing manganese sulfate by using waste by-products produced from titanium dioxide and low-grade pyrolusite. Background technique [0002] Manganese ore is widely distributed in nature in the form of various compounds. Since the discovery of pyrolusite in the 1870s, people have used various methods to produce metal manganese, manganese alloys and manganese compounds. They are widely used in industry, agriculture and Military and so on. my country's manganese ore resources are rich but not rich. The accumulated proven manganese ore reserves are 600-400 million tons, ranking fourth in the world, with an average manganese grade of about 21%. Among them, rich ore only accounts for 6.43% of the country's total reserves, and poor manganese ore accounts for 93.6%. The ore ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10B09B3/00
Inventor 潘向雷甘永乐
Owner 蓝星安迪苏股份有限公司
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