Method of producing titanium and titanium alloy nanopowder from titanium-containing slag through shortened process

A method of producing titanium and titanium alloy nanopowder from titanium-containing slag through a shortened process, comprising:

• 1) mixing titanium-containing slag A with a modifier B in a reaction vessel;
• heating the reaction vessel to a reaction temperature for oxidation and enrichment, titanium in the titanium-containing slag A being formed into TiO32− by the modifier B;
• and then cooling to precipitate titanium-enriched slag containing titanate C;
• 2) subjecting the titanium-enriched slag obtained in step 1) to pulverization, gravity flotation and drying to separate the titanium-enriched slag from other impure ores;
• 3) repeating steps 1) and 2) to improve purity of the titanate C as an intermediate;
• 4) mixing the titanate C obtained in step 3) and a molten salt medium;
• dehydrating under vacuum and then melting at 550-900° C. to form a molten salt reaction system, titanium in the mixture being formed into TiO32−;
• 5) adding a reducing agent into the molten salt reaction system obtained in step 4) for thermal reduction in an inert gas at 400-900° C. to synthesize titanium and salt-containing titanium alloy nanopowder;
• and
• 6) vacuum filtering, pickling, washing and vacuum drying the salt-containing titanium alloy nanopowder obtained in step 5);
• and then separating the titanium alloy nanopowder from the salt-containing titanium alloy nanopowder to obtain titanium and titanium alloy nanopowder.