Magnesium reduction method for phosphorite

Magnesium reduction method for phosphorite

The invention discloses a magnesium reduction method for phosphorite, comprising the following steps: uniformly mixing the phosphorite with P2O5 grade of 28 percent to 30 percent and MgO grade of 1.8 percent to 3.5 percent with water, magnesium bisulfate, sulfuric acid, phosphoric acid and sodium al...

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Hauptverfasser: YU SIHAI, LIU YIMING, SONG RUIFENG, GUO WENPING, SUN LITIAN, SUN JINGSHAN, ZHOU CHANGFU, SHEN LIXIN, FU KEWEN, YANG TENGJU, WANG WEIMIN
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Sprache:chi ; eng
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CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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creator YU SIHAI
LIU YIMING
SONG RUIFENG
GUO WENPING
SUN LITIAN
SUN JINGSHAN
ZHOU CHANGFU
SHEN LIXIN
FU KEWEN
YANG TENGJU
WANG WEIMIN
description The invention discloses a magnesium reduction method for phosphorite, comprising the following steps: uniformly mixing the phosphorite with P2O5 grade of 28 percent to 30 percent and MgO grade of 1.8 percent to 3.5 percent with water, magnesium bisulfate, sulfuric acid, phosphoric acid and sodium aliphatate to react, wherein hydrogen phosphate radical ions replace carbonate radical ions in dolomite, magnesium ions are combined with fatty acid radical ions in the sodium aliphatate and form foams with carbon dioxide gas, and the dolomite overflows by adhering in the foams to finish magnesium reduction of the phosphorite. The method has low ore dressing cost, solves the problem that high magnesium phosphate concentrate ores produced by the prior positive flotation technology can not be used for producing high-quality diammonium phosphate, and particularly lowers the weight percentage content of MgO in the phosphorite (collophanite) of a medium or low grade to below 1 percent.
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subjects CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
title Magnesium reduction method for phosphorite
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