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Method for preparing manganese sulfate and battery-grade manganese sulfate by using manganese-containing ore

A technology of manganese sulfate and manganese ore, which is applied in the field of metallurgy, can solve the problems of reducing equipment use efficiency, uncontrollable leaching reaction rate, consumption of sulfuric acid, etc., and achieves the effects of low cost, easy separation and purification, and high extraction rate

Pending Publication Date: 2020-12-04
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for production of pure magnesium oxysulphoxides (MOS) without adding excessive materials or requiring expensive chemicals like acids. It also simplifies separation processes and reduces costs compared to existing methods such as hydrothermal treatment and solvent extractions. Overall, this new technique provides an efficient way to extract MgO at reduced prices over traditional ways that use corrosion products containing chromates.

Problems solved by technology

Technological Problem: Current methods involve either individually digging up each type of metal resource (magnesium) separately, resulting in low yield rates and high costs associated therewith.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The invention provides a kind of method utilizing manganese-containing ore to prepare manganese sulfate, comprising the following steps:

[0044] Step 1: Pulverize the rhodochrosite ore, calcinate it at 600°C for 24 hours, then clinker it, then pulverize it with a pulverizer, pass it through a 100-mesh sieve, and collect the sieved material;

[0045] Step 2: Put the material with a mass of 1000g into the fixed bed reactor, and feed the mixed gas of sulfur dioxide, oxygen and water vapor with a volume ratio of 1:2:2. When the concentration of sulfur dioxide at the inlet of the reactor is not much different from the concentration at the outlet , that is, the difference between the concentration of sulfur dioxide at the inlet and the concentration of sulfur dioxide at the outlet is ±5%, stop feeding the mixed gas;

[0046] Step 3: The reacted material is washed with deionized water with a solid-to-liquid ratio of 1:5, coarsely filtered with a coarse filter, and finely filt...

Embodiment 2

[0050] The invention provides a kind of method utilizing manganese-containing ore to prepare manganese sulfate, comprising the following steps:

[0051] Step 1: Pulverize the rhodochrosite ore, calcinate it at 700°C for 12 hours, then clinker it, then pulverize it with a pulverizer, pass it through a 200-mesh sieve, and collect the sieved material;

[0052] Step 2: Put the material with a mass of 1000g into the fixed bed reactor, and feed the mixed gas of sulfur dioxide, oxygen and water vapor with a volume ratio of 1:2:2. When the concentration of sulfur dioxide at the inlet of the reactor is not much different from the concentration at the outlet , that is, the difference between the concentration of sulfur dioxide at the inlet and the concentration of sulfur dioxide at the outlet is ±5%, stop feeding the mixed gas;

[0053] Step 3: The reacted material is washed with deionized water with a solid-to-liquid ratio of 1:4, coarsely filtered with a coarse filter, and finely filt...

Embodiment 3

[0057] The invention provides a kind of method utilizing manganese-containing ore to prepare manganese sulfate, comprising the following steps:

[0058] Step 1: Pulverize the rhodochrosite ore, calcinate it at 800°C for 8 hours, then clinker it, then pulverize it with a pulverizer, pass it through a 300-mesh sieve, and collect the sieved material;

[0059] Step 2: Put the material with a mass of 1000g into the fixed bed reactor, and feed the mixed gas of sulfur dioxide, oxygen and water vapor with a volume ratio of 1:2:2. When the concentration of sulfur dioxide at the inlet of the reactor is not much different from the concentration at the outlet , that is, the difference between the concentration of sulfur dioxide at the inlet and the concentration of sulfur dioxide at the outlet is ±5%, stop feeding the mixed gas;

[0060] Step 3: The reacted material is washed with deionized water with a solid-to-liquid ratio of 1:3, coarsely filtered with a coarse filter, and finely filte...

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PUM

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Abstract

The invention discloses a method for preparing manganese sulfate from manganese-containing ore. The method comprises the following steps: pulverizing and calcining rhodochrosite, pulverizing by a pulverizer, screening, filling a fixed bed reactor with the pulverized rhodochrosite, introducing a gas mixture containing sulfur dioxide, oxygen and water vapor, reacting for 12 hours until the difference between the sulfur dioxide concentration at the reactor inlet and the sulfur dioxide concentration at the reactor outlet is small, stopping introducing the mixed gas, washing with deionized water, and carrying out rough filtration and fine filtration to obtain a filtrate; heating the filtrate, introducing air for 3 hours, adding sulfuric acid to adjust the pH value to 2-4, filtering to remove manganese dithionate, adding ammonia water into a neutralizing tank, clarifying and precipitating, and filtering to remove impurities, thereby obtaining a manganese sulfate clear solution; and further purifying, and preparing battery-grade manganese sulfate. According to the method for preparing manganese sulfate, no reducing substance needs to be added, the process is simple and easy to operate, and the extraction rate of manganese is high.

Description

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Claims

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Application Information

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Owner PANZHIHUA UNIV
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