METHOD OF TITANIUM-SILICON RAW MATERIALS DECOMPOSITION Russian patent published in 2005 - IPC

FIELD: methods of reprocessing of titanium-silicon raw materials.

SUBSTANCE: the invention is pertaining to methods of reprocessing of titanium-silicon raw materials and may be used for production of high quality goods on the basis of titanium. As a starting raw material use titanium-silicon product nitrogenous- fluoride decomposition of sphene concentrate and treat it with 80-85 % sulfuric acid. Titanium-silicon product has a structure (in mass %): 48.80-50.90 TiO²; 36.50-38.10_{SiO²; 1.78-1.85 CaO; 0.64-0.66Fe2O3; 0.23-0.24Al2O3; 0.50-0.52(T2O5 + Nb2O5); 0.020-0.021Ln2O3; 2.20-2.30 F; 5.41-9.33H2O. Sulfuric acid and titanium-silicon product are taken in the quantity meeting to the mass ratio ofH2SO4:TiO2 = l.5-l.6 : 1. The reaction mass is formed by its briquetting, heat it up to 150-160°C and hold at the temperature of heating. The conglomerated fragile porous cakes are cooled and leached by water with production of a titanium sulfate solution. The technical effect is an increased degree of extraction of titanium in the solution at a simultaneous raise of technological effectiveness of the method due to a decreased consumption of the acid, a decreased power input in the process and prevention of sintering of the reaction mass into a monolithic fusion cake. In addition the method improves the quality the produced titanium sulfate solution due to a decrease of the acid factor.}

EFFECT: the invention ensures an increased extraction of titanium in the solution and improved the quality at a simultaneous raise of technological effectiveness of the method, decreased consumption of the acid and the power input, prevention of sintering of the reaction mass into a monolithic fusion cake.

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