METHOD FOR PRE-TREATING PHOSPHORUS ROCK BY TITANIUM DIOXIDE WASTE ACID

A method for pre-treating phosphorus rock by titanium dioxide waste acid, comprises process steps of enabling an acid solution and phosphorus rock pulp having solid content being more than 75% to react in an reaction tank to obtain reaction slurry and performing solid-liquid separation on the reacti...

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Bibliographic Details
Main Authors CAI, PINGXIONG, XIANG, SHUGANG, ZENG, XIAOLIN, ZHU, QUANFANG, LI, WEI, WEN, JUN
Format Patent
LanguageChinese
English
French
Published 28.11.2013
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:A method for pre-treating phosphorus rock by titanium dioxide waste acid, comprises process steps of enabling an acid solution and phosphorus rock pulp having solid content being more than 75% to react in an reaction tank to obtain reaction slurry and performing solid-liquid separation on the reaction slurry. The acid solution is prepared through the following steps: (1) collecting titanium dioxide waste acid, obtained in sulfate-based titanium dioxide production, to a waste acid storage tank, and controlling content of sulfuric acid in the titanium dioxide waste acid to be 20-30%, and content of ferrous sulfate to be 10-14%; (2) mixing and diluting dilution water and the titanium dioxide waste acid according to the mass ratio of (4-10):1, and controlling content of the sulfuric acid to be 1-8%. The method not only has high magnesium removing rate and low phosphorus loss rate, but also solves the problem that fluctuation of the acid concentration influences a pre-treatment pH value. The method is suitable for
Bibliography:Application Number: WO2012CN78208