| 摘要 |
The cost-effective hydrogenated, purified titanium powder is manufactured by the semi-continuous process including: (a) magnesium-thermic reduction of titanium chlorides at 830-880° C. in the hydrogen atmosphere characterized by the formation of a hollow porous block of the reaction mass having an open cavity in the center of the block, (b) full thermal-vacuum separation of the hollow block from excessive Mg and MgCl2 at 850-980° C. and residual pressure of 26-266 Pa using a multi-step cycle including: (i) purging hydrogen at 800-950° C. into the reactor at the pressure 10 kPa to 24.5 kPa, (ii) directive squeezing-out of a separated liquid phase containing magnesium and magnesium chloride into an additional vessel, and (iii) application of alternate pressure to small portions of the liquid phase in porous titanium compound from different sides which provides removal of the liquid from small pores of the titanium compound and fast evaporation of said liquid, (c) simultaneous hydrogenation and cooling of the titanium sponge down to 600° C. by purging cold hydrogen using multiple recirculation of hydrogen, (d) holding the hydrogenated porous titanium compound in the hydrogen atmosphere at 450-600° C. for 20-70 minutes, (e) removing the hydrogenated porous titanium compound from the reactor, and (f) crushing and grinding the crushed hydrogenated porous titanium pieces into the powder having a predetermined particle size.
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