Producing a titanium product
A method ( 400 ) for producing a titanium product is disclosed. The method ( 400 ) can include obtaining TiO 2 -slag ( 401 ), and producing a titanium product from the TiO 2 -slag using a metallic reducing agent ( 402 ) at a moderate temperature and a pressure to directly produce a titanium product chemically separated from metal impurities in the TiO 2 slag ( 403 ). The titanium product can comprise TiH 2 and optionally elemental titanium. Impurities in the titanium product can then removed ( 404 ) by leaching, purifying and separation to form a purified titanium product.
1. A method for producing a titanium product, comprising:
obtaining TiO 2 -slag;
producing the titanium product from the TiO 2 -slag using a metallic reducing agent at a moderate temperature under a hydrogen atmosphere at a pressure to directly produce the titanium product chemically separated from metal impurities in the TiO 2 -slag, wherein the titanium product comprises TiH 2 and optionally elemental titanium;
removing the metal impurities from the titanium product to form a purified titanium product; and
deoxygenating the titanium product at a higher temperature above the moderate temperature and under hydrogen atmosphere using a second reducing agent which is stronger than the metallic reducing agent to produce a particulate titanium product, coarsening the particulate titanium product to a target particle size range, and cooling the particulate titanium product under a hydrogen atmosphere.
2. The method of claim 1 , wherein the step of producing the titanium product includes reducing the TiO 2 -slag directly with the metallic reducing agent.
3. The method of claim 1 , wherein the step of producing includes pre-treating the TiO 2 -slag to produce intermediate products including at least one of water-washed derivatives of sodium titanate, metatitanic acid, and substantially pure titanium dioxide and then reducing the intermediate products using the metallic reducing agent.
4. The method of claim 1 , wherein the metallic reducing agent comprises at least one of Mg, MgH 2 , and CaH 2 .
5. The method of claim 1 , wherein the producing the titanium product from the TiO 2 -slag comprises combining the TiO 2 -slag, the metallic reducing agent, and a salt.
6. The method of claim 5 , wherein the salt comprises at least one of a mono-metal chloride salt, binary chloride salt, and a ternary chloride salt.
7. The method of claim 5 , wherein the salt comprises at least one of MgCl 2 +NaCl, MgCl 2 +KCl, and MgCl 2 +CaCl 2 .
8. The method of claim 1 , further comprising dehydriding the purified titanium product to form titanium powder.
9. The method of claim 1 , further comprising deep-deoxidizing the purified titanium product to reduce residual oxygen in the purified titanium product.
10. The method of claim 1 , wherein the moderate temperature is between about 400° C. and about 1200° C.
11. The method of claim 1 , wherein obtaining the TiO 2 -slag comprises carbothermally reducing a titanium feedstock comprising at least one of ilmenite, natural rutile, and leucoxene.