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Magnesium precipitation technology in magnesium oxide production by peridotite mine

A technology of peridotite ore and magnesium oxide, applied in the direction of magnesium oxide, etc., can solve the problem of low utilization rate, achieve the effect of improving comprehensive benefits, improving purity and extraction rate

Inactive Publication Date: 2018-10-16
张勤福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the magnesium precipitation step is very important. The magnesium content that can be raised by the direct reaction is generally precipitated by adding alkali. Although the purity of the traditional ammonia magnesium precipitation is high, the magnesium precipitation rate is only 80-85%, and the utilization rate is low. Further steps are still needed. Process Improvements to Increase Magnesium Extraction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The magnesium precipitation process in the process of producing magnesium oxide from peridotite mines, including ore dressing and grinding, purification and impurity removal, flotation treatment, and magnesium precipitation treatment;

[0022] Mineral dressing and grinding: Use peridotite ore, crush and grind it until it passes through a 150 mesh sieve to obtain a fine material;

[0023] Purification and impurity removal: Use high temperature and high acid to leach nickel, magnesium, and iron in the fine material 1 to obtain a leaching solution, then remove iron, deposit nickel, and concentrate and crystallize to obtain a purified material. The iron content in the purified material is <0.02%, and the nickel content is <0.02 %; Among them, the high temperature and high acid leaching is specifically a temperature of 90 ° C, a time of 2 hours, the mass ratio of the acid leaching solution to the fine material 1 is 2:1, and the acid leaching solution is a mixture of sulfuric ...

Embodiment 2

[0027] The magnesium precipitation process in the process of producing magnesium oxide from peridotite mines, including ore dressing and grinding, purification and impurity removal, flotation treatment, and magnesium precipitation treatment;

[0028] Mineral dressing and grinding: Use peridotite ore, crush and grind it until it passes through a 150 mesh sieve to obtain a fine material;

[0029] Purification and impurity removal: Use high temperature and high acid to leach nickel, magnesium, and iron in the fine material 1 to obtain a leaching solution, then remove iron, deposit nickel, and concentrate and crystallize to obtain a purified material. The iron content in the purified material is <0.02%, and the nickel content is <0.02 %; Among them, the high-temperature and high-acid leaching is specifically a temperature of 95 ° C, a time of 1.5 hours, a mass ratio of acid leaching solution to fine material 1 is 3:1, and the acid leaching solution is a mixture of sulfuric acid and...

Embodiment 3

[0033] The magnesium precipitation process in the process of producing magnesium oxide from peridotite mines is characterized in that it includes ore dressing and grinding, purification and impurity removal, flotation treatment, and magnesium precipitation treatment;

[0034] Mineral dressing and grinding: Use peridotite ore, crush and grind it until it passes through a 150 mesh sieve to obtain a fine material;

[0035] Purification and impurity removal: Use high temperature and high acid to leach nickel, magnesium, and iron in the fine material 1 to obtain a leaching solution, then remove iron, deposit nickel, and concentrate and crystallize to obtain a purified material. The iron content in the purified material is <0.02%, and the nickel content is <0.02 %; Among them, the high temperature and high acid leaching is specifically a temperature of 95 ° C, a time of 2 hours, the mass ratio of the acid leaching solution to the fine material 1 is 2:1, and the acid leaching solution...

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PUM

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Abstract

The invention puts forward a magnesium precipitation technology in magnesium oxide production by a peridotite mine. The magnesium precipitation technology comprises the technical steps of mineral dressing grinding, purification for edulcoration, flotation processing, magnesium precipitation processing and the like. Through reasonable grinding smashing, acid leaching for edulcoration, flotation purification and precipitation separation, magnesium extraction purity and extraction rate can be effectively improved, steps are cooperatively accelerated, the purity of prepared magnesium can be 99.7%or above, the magnesium oxide extraction rate can be 89.7-94.2%, and comprehensive benefits are obviously improved.

Description

technical field [0001] The invention relates to the technical field of ore extraction, in particular to a magnesium precipitation process in the process of producing magnesium oxide from peridotite ore. Background technique [0002] Peridotite is an igneous rock non-metallic mineral whose main components are olivine minerals and pyroxene, including olivine, fayalite and forsterite. Olivine belongs to the orthorhombic crystal system, and the crystals are in the shape of thick plates, usually in the form of granular aggregates. Peridotite is a fully crystalline euhedral or other-shaped granular structure with a dense massive structure. The MgO content of pure peridotite can reach 49%, and its melting point is as high as 1910 degrees Celsius. Peridotite is less fresh and is easily altered into serpentinite, with a density of 2.94 to 3.37 grams per cubic centimeter, high tensile strength and alkali resistance. Peridotite often forms complex rocks with dunite, pyroxene and othe...

Claims

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Application Information

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IPC IPC(8): C01F5/02
CPCC01F5/02C01P2006/80
Inventor 张勤福
Owner 张勤福
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