Patent RU-2255900-C1 (RU)
Inventor: GORDIENKO P S
IPC: C01G23/047
Filed: 2004-03-22
Granted: 2005-07-10
Abstract: FIELD: equipment and methods of fluorine processing of titanium-containing raw materials. 
     SUBSTANCE: the invention is pertaining to the field of equipment and methods of fluorine processing of titanium-containing raw materials, for example, fluorine processing of ilmenite concentrates, at titanium dioxide production. The reactor installation contains the reactor coupled with the sources of reactants, which through a discharge assembly is connected with apparatuses of the subsequent processing of the reaction products. At that the reactor, devices and components of the installation are made out of a material resistant to action of the contacting with them corrosive materials. 
     At that as sources of the reactants use a hopper - for a solid titanium-containing material, for example, ilmenite, and a source of ammonium fluoride. The discharge assembly contains a filtrate outlet, a slurry outlet and a gas outlet. At that the gas outlet of the reactor is fused to an ammonia feeder, the reactor filtrate outlet is fused to the first screen, a filtrate outlet of which is coupled to the second screen, the filtrate outlet of which is coupled to the cavity of a hydrolysis reactor, the outlet of which is in turn coupled to the third screen, the outlet of which is coupled to the first dryer-dispenser, the slurry outlet of which is coupled to a charging assembly of the first reactor of the pyrohydrolysis, the outlet of which is coupled to a container for storage of a satin white. At that the gas outlets of the second screen, the first dryer-dispenser, the third screen and the first reactor of pyrohydrolysis are coupled to the source of ammonium fluoride. Besides the ammonia feeder is additionally coupled to the second screen and to the cavity of the reactor of hydrolysis. At that the source of ammonium fluoride is additionally coupled to the cavity of the reactor of hydrolysis. Besides the slurry outlets of the reactor and the first screen are coupled to the second dryer-dispenser, the slurry outlet of which is coupled to the cavity of the second reactor of pyrohydrolysis, outlet of which is coupled to a container for storage of a red pigment. At that the gas outlets of the second dryer-dispenser and the second reactor of pyrohydrolysis are coupled to the source of the ammonium fluoride. In addition the cavities of the first and the second reactors of pyrohydrolysis are coupled to the source of steam through the steam conduits. The invention ensures improved reliability and the state of serviceability of the installation in conditions of usage of the highly-corrosive fluorine-containing materials during processing of titanium-containing raw material and high yield of white and red pigments, high completeness of utilization of the raw materials, high yield and whiteness of the product, and also simplification of the process. 
     EFFECT: the invention ensures simplified process, improved installation reliability and serviceability, raw materials utilization completeness, high yield of white and red pigments, high product whiteness. 
     5 cl, 4 dwg