METHOD OF PROCESSING OF RAW MATERIALS CONTAINING TITANIUM Russian patent published in 2009 - IPC C22B34/12 C22B1/02 C01G23/07 

FIELD: metallurgy.

SUBSTANCE: invention relates to a method of processing of the raw materials containing titanium and can be used to obtain fine titanium dioxide and ferric oxide base powders. The method involves fluorination of the raw materials by means of sintering with fluoride reagent, heat treatment of the fluorinated mass in order to separate the fluorination products by sublimation, pyrohydrolysis of the residue left after sublimation to obtain ferric oxide. Fluorination uses ammonium fluoride as the fluoride reagent, ammonium bifluoride or their mixture and fluorination is performed at 110-240°C for 0.5-5 hours in vacuum or in inert gas. Heat treatment of the fluorinated mass at sublimation is performed at 300-600°C. The sublimation products are trapped with water obtaining a solution of ammonium fluorotitanate and hydrated titanium dioxide is precipitated with an aqueous solution of ammonia. After that the sediment is filtered from the solution of ammonium fluoride and heat treated to obtain anhydrous titanium dioxide. Pyrohydrolysis of the residue after sublimation is performed at 300-650°C for 0.5-3 hours.

EFFECT: increased degree of titanium extraction as fine powder and reduced energy intensity of the process.

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