METHOD FOR OBTAINING FINE TITANIUM POWDER Russian patent published in 2017 - IPC C22B34/12 B22F9/02 C22B9/16 C22B9/14 C22C14/00 

FIELD: chemistry.

SUBSTANCE: method comprises the activation of the starting material, the hydrogenation, grinding the resulting titanium hydride, titanium hydride thermal decomposition in a vacuum and grinding the resulting cake of titanium. As starting material the ingot is used, which is obtained by the vacuum remelting of titanium raw materials in water-cooled copper ingot mold and crystallizing at a specific heat flux through the surface of the mold (3.3-3.9) ⋅ 10⁶ W / m². Activation is led in two stages: first treating solution containing water, nitric acid and hydrofluoric acid at a component ratio H₂O: HNO₃:HF, equal to (0.9 ÷ 1.1):(0.9 ÷ 1.1):(0.17 ÷ 0.23) followed by hydrogenation in the chamber containing hydrogen chloride in volume of 0.01-0.015% of chamber volume. Hydrogenation is conducted at an excess pressure of hydrogen in the hydrogenation chamber 1.1-2.0 atm until the hydrogen content in titanium 350-410 l/kg.

EFFECT: increasing of yield of usable powder with granules rounded form 20-50 microns.

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