Fluidized bed reaction system and method of producing titanium tetrachloride
AssigneeBic Technologies Group, LLC
InventorsYoung Jin Kwon, Gordon Chun, Jeong Hi Kim
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Abstract
This disclosure relates to a fluidized bed reaction system and method for continuous production of titanium tetrachloride from titanium-bearing materials containing high concentrations of alkaline earth metal impurities. Agglomerated heavy particles in a reaction are taken out continuously from a chlorination reactor without clogging and stopping. The reactors and related methods disclosed apply to the chlorination of titanium slag containing high content of alkaline earth metal oxides of up to 15% by weight.
Claims20
A fluidized bed reaction system comprising:
- a reactor base comprising a center and a rim, wherein the center is recessed relative to the rim;
- at least one reactor wall defining, together with the reactor base, an enclosed space comprising a collection zone and a reaction zone, wherein the collection zone comprises a space within the recessed center of the reactor base, wherein the reaction zone comprises a space above the center and the rim of the reactor base such that the reaction zone is above the collection zone;
- a plurality of center nozzles formed through the recessed center of the reactor base and configured to supply fluidizing gas to the reaction zone via the collection zone;
- a plurality of rim nozzles formed through the rim of the reactor base and configured to supply fluidizing gas directly to the reaction zone;
- and
- a gas flow control configured to control flow of the fluidizing gas to the plurality of center nozzles and to the plurality of rim nozzles such that a linear fluidizing velocity of the fluidizing gas supplied through the plurality of center nozzles is substantially lower than a linear fluidizing velocity of the fluidizing gas supplied through the plurality of rim nozzles.
A method of producing titanium tetrachloride, the method comprising:
- introducing TiO2-containing slag into a reaction zone of a reactor;
- and
- supplying fluidizing gas comprising chlorine gas to the reaction zone to cause the following reaction within the reaction vessel:
- TiO2+2Cl2+C→TiCl4+CO/CO2,
- wherein the fluidizing gas is supplied via center nozzles formed through a central portion of a reactor base and further via rim nozzles formed through a rim of the reactor base that surrounds the central portion,
- wherein the fluidizing gas supplied via the central nozzles is supplied at a first linear fluidizing velocity whereas the fluidizing gas supplied via the rim nozzles is supplied at a second linear fluidizing velocity that is higher than the first linear fluidizing velocity.
Dependencies are inferred from the claim text.