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Method for preparing manganese sulfate, ferrous sulfate and calcium sulfate from manganese ore tailings

A technology of ferrous sulfate and manganese sulfate, applied in the direction of ferric sulfate, manganese sulfate, calcium/strontium/barium sulfate, etc., can solve the problems of land occupation, environmental pollution, resource waste, etc., and achieve low equipment investment and high yield High, easy-to-step effects

Inactive Publication Date: 2011-07-06
谢善情
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  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, because manganese tailings cannot be comprehensively utilized, they can only be stacked and stored, occupying a large amount of land resources and causing serious environmental pollution. On the other hand, due to the inability to comprehensively utilize manganese tailings, a large amount waste of resources

Method used

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Examples

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Embodiment 1

[0013] Embodiment 1: a kind of method for preparing manganese chloride, ferrous chloride and calcium chloride with manganese tailings, the method comprises following specific steps:

[0014] Step A: crush the manganese tailings into 80-100 mesh, mix with excess dilute hydrochloric acid solution, make hydrochloric acid react with MnO2, calcium oxide, magnesium oxide and iron to generate manganese chloride, calcium chloride, magnesium chloride and ferrous chloride ; Filter the reaction solution, remove insoluble silicon dioxide, obtain the filtrate mainly containing ferrous chloride, calcium chloride, magnesium chloride and manganese chloride;

[0015] Step B: in the filtrate of step A gained, add excessive sodium sulfide, react under stirring, generate manganese sulfide precipitation, ferrous sulfide precipitation and calcium sulfide precipitation, filter reaction solution, obtain containing manganese sulfide, ferrous sulfide and calcium sulfide Filter cake, the filtrate contai...

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PUM

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Abstract

The invention provides a method for preparing manganese sulfate, ferrous sulfate and calcium sulfate from manganese ore tailings. The manganese ore tailings are pulverized to powders of 80 meshes to 100 meshes, the powders react with an excessive amount of dilute hydrochloric acid, and the reaction product is filtered to produce a filtrate; an excessive amount of sodium sulfide is added to the filtrate, and the reaction liquid is filtered to produce a filter cake containing manganese sulfide, ferrous sulfide and calcium sulfide; the filter cake containing manganese sulfide, ferrous sulfide and calcium sulfide reacts with a sulfuric acid solution, the reaction product is filtered to produce a filter cake of calcium sulfate and a filtrate containing manganese sulfate and ferrous sulfate, and the filtrate containing manganese sulfate and ferrous sulfate is distilled under a reduced pressure to produce a saturated solution; the saturated solution is cooled at different temperatures according to the difference in solubility between manganese sulfate and ferrous sulfate at different temperatures, so as to produce manganese sulfate crystals and ferrous sulfate crystals respectively; the crystallization product is filtered and dried to obtain a manganese sulfate product and a ferrous sulfate product respectively; and the filter cake of calcium sulfate is washed, dried and pulverized to obtain a calcium sulfate product.

Description

technical field [0001] The invention relates to comprehensive utilization of manganese tailings, in particular to a method for preparing manganese sulfate, ferrous sulfate and calcium sulfate from manganese tailings. Background technique [0002] In modern industry, manganese and its compounds are used in various fields of national economy. Among them, the iron and steel industry is the most important field. The amount of manganese used accounts for 90% to 95%. It is mainly used as a deoxidizer and desulfurizer in the process of ironmaking and steelmaking, and used to make alloys. The remaining 10% to 5% of manganese is used in other industrial fields, such as chemical industry (manufacturing various manganese salts), light industry (used in batteries, matches, printing paint, soap making, etc.), building materials industry (glass and ceramics) colorant and fading agent), defense industry, electronics industry, and environmental protection and agriculture and animal husband...

Claims

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Application Information

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IPC IPC(8): C01G45/10C01G49/14C01F11/46B09B3/00
Inventor 谢善情
Owner 谢善情
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