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Method for preparing manganese sulfate

A manganese sulfate and sulfide technology, applied in the directions of manganese sulfate, manganese oxide/hydroxide, etc., can solve the problem that the material cannot meet the requirements, and achieve the effect of solving the problem of comprehensive separation and meeting the strict requirements.

Active Publication Date: 2010-05-12
贵州红星发展大龙锰业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional craft MnSO 4 ·H 2 O and MnCO 3 The material can no longer meet the requirements of this type of product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Put 4000ml 50g / L SrS solution in a 5000ml beaker, add 840g manganese oxide ore powder (MnO 2 25.1%, Fe 7.8%), heat up the electric furnace to the solution temperature range of 70±5°C, react for 2 hours and separate by suction filtration, wash the filter residue twice with 1:4 hot water (60°C), and stir at 70±80°C for 30 minutes for solid-liquid separation.

[0019] After washing, the main component of the solid is manganese oxide, which contains a small amount of metal sulfide. It is placed in a 2000ml beaker, and a small amount of deionized water is added to make a slurry, and 9mol / L H 2 SO 4 During the reaction, measure the pH value at any time during the reaction process, stop adding acid when the pH value is 3, separate by suction filtration, rinse the filter residue with a small amount of hot water, combine the filtrate and filter it once with a 0.24um filter membrane. MnSO 4 The content in the solution is controlled at 310±10g / L.

[0020] Place the above-menti...

Embodiment 2

[0022] Add 0.47mol / L Sr(HS) to a 5000ml beaker 2 4000ml, add 514g manganese oxide ore powder (MnO 2 34.0%, Fe 12.7%), heated in an electric furnace to 60-65°C, stirred and reacted for 2.5 hours, separated by suction filtration, recovered strontium hydroxide from the filtrate, washed the filter residue twice with hot water at 80°C, kept stirring for 30 minutes each time and then suction filtered separate.

[0023] Place the washed manganese oxide in a 2000ml beaker, add a small amount of deionized water to make a slurry, and slowly add 12mol / L H 2 SO 4 Reaction, stop adding acid when reacting to a pH value of 4, MnSO 4 The content in the solution is controlled at 390±10g / L. Then suction filtration and separation, the filter residue is rinsed with a small amount of hot deionized water, and after the combined filtrate is precision filtered, it is placed in a 2000ml beaker, and H 2 SO 4 to pH 2, add 27.5% H 2 o 2 1.5ml, heating and evaporating in an electric furnace to c...

Embodiment 3

[0025] Add 180g / L BaS solution in 5000ml beaker, add 583g ore powder (MnO 2 34%, Fe12.7%), control the reaction temperature at 70-75°C, carry out suction filtration after stirring for 2.5 hours, recover barium hydroxide from the filtrate, and wash the filter residue twice with 80°C deionized water according to the ratio of 1:4 material to water , stirred for 30 minutes each time, and carried out solid-liquid separation.

[0026] Place the washed manganese oxide in a 2000ml beaker, add a small amount of deionized water to make a slurry, and slowly add 12mol / L H 2 SO 4 Reaction, stop adding acid when reacting to a pH value of 4.5, MnSO 4 The content in the solution is controlled at 350±10g / L. Carry out suction filtration separation then, filter residue rinses with a small amount of hot deionized water, merges filtrate and carries out precision filtration, and filter residue abandons, and filtrate is placed in 2000ml beaker and adds H 2 SO 4 to pH 3, add 27.5% H 2 o 2 1.5ml...

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Abstract

The invention relates to a method for preparing manganese sulfate. The method comprises the following steps: quantitatively adding sulfide with reducibility into a manganese dioxide ore in a reaction molar ratio for sufficient reaction, determining a reaction end point, and separating and washing a solid-phase resultant; reacting the solid-phase resultant with 9 to 12mol / L H2SO4, controlling the reaction end point to the pH of between 3 and 5, controlling the concentration of MnSO4 in the reaction liquid in a range of between 300 and 400g / L, performing solid-liquid separation after the reaction is completed; acidizing the separated solution by H2SO4 until the pH value of the solution is between 2 and 3, adding hydrogen peroxide into the solution and heating the mixture, precisely filtering and removing the part of solid phase; and distilling, concentrating, crystallizing and dehydrating the filtrate to prepare the manganese sulfate. The method can prepare acid soluble manganous oxide and ensure that various heavy metals can generate insoluble sulfides so as to solve the problem of completely separating heavy metals and obtain the manganese sulfate with low calcium magnesium and low heavy metals.

Description

technical field [0001] The invention relates to a preparation method of manganese sulfate, which uses reducing sulfide to react with manganese oxide ore to prepare low-heavy metal manganese sulfate, and further prepares low-heavy metal and low-calcium-magnesium manganese sulfate. Background technique [0002] Manganese sulfate is a kind of basic chemical raw material, and the method for traditional preparation manganese sulfate is a lot, discloses a kind of utilizing manganese dioxide (MnO2) as publication number CN1425613 2 ) and barium sulfide (BaS) as raw materials to prepare barium hydroxide (Ba(OH) 2 ) and manganese sulfate (MnSO 4 ) process method, but the manganese sulfate prepared by this method contains a large amount of impurities, especially heavy metal ions and calcium and magnesium ions. According to the teaching of this open document, the manganese sulfate of high yield must be added in excess molar ratio relative to the sulfide of manganese dioxide. But thi...

Claims

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Application Information

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IPC IPC(8): C01G45/10
CPCC01G45/02C01G45/10C01P2006/80
Inventor 姜志光华东
Owner 贵州红星发展大龙锰业有限责任公司
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