Production technology and method of titanium sponge

Method the sponge metal titanium produced metal thermal reduction. % purity (quality) is generally 99.1 ~ 99.7. Impurity elements% (quality) a total of 0.3 ~ 0.9, impurity elements oxygen% (mass) of 0.06 ~ 0.20, hardness (HB) ranged from 100 to 157, according to the different purity of WHTiO to MHTi4 five grades. As the main raw material for the preparation of industrial titanium alloys. Sponge titanium production is the basic link of titanium industry, it is titanium, titanium powder and other raw materials of titanium sponge  The ilmenite becomes four titanium sponge, then put in a sealed stainless steel tank, filled with argon, making them react with the magnesium metal, get "titanium sponge". The porous, "sponge titanium" is not used directly, also must put them in an electric furnace melting into a liquid, in order to cast titanium alloy plates  Molten salt chlorination process is developed in the former Soviet Union in twentieth Century 60, method for production of four titanium sponge, the raw material characteristics of this method is applicable not only to the former Soviet Union (titanium slag containing CaO+MgO about 6%), the furnace production capacity of 20 t/m2 ~25 t/m2 four titanium chloride, molten salt section area of 6m2. Large molten salt Nissan four Titanium alloy sheet chloride was 120 t~150 T, formerly the rectangular furnace, the furnace for the round, round molten salt chlorination furnace size of Φ 5 m × 8.5 m, inner diameter is 2.76 m, the rectangle is 4.5 m × 3.5 m × 8.5 M. No dead angle circular furnace, furnace body strength increase, 3 years 1 times than the rectangular furnace overhaul, nearly 1 times the service life extension. Molten salt chlorination can use a variety of rich titanium material, in addition to titanium slag containing calcium magnesium, is now widely used by red ilmenite (Fe2O3 3TiO2) Ti slag smelting (TiO2 87%~91%), can also use the rutile.