METHOD OF PRODUCTION OF TANTALUM POWDER OF HIGH CHEMICAL PURITY AND DEVICE FOR IMPLEMENTATION OF THIS METHOD Russian patent published in 2009 - IPC C22B34/24 C22B5/04 B22F9/22 

FIELD: metallurgy.

SUBSTANCE: invention refers to powder metallurgy, particularly to method and device for production of tantalum powder of high chemical purity; suggested powder can be utilised at production of condensers. The method consists in sodium-reduced reduction of potassium fluor-tantalate by means of batched or continuous dosing of potassium fluor-tantalate. Also reduction is performed at free fall of potassium fluor-tantalate crystals in the medium of inert gas and sodium vapors. The device contains a furnace heated reaction vessel with a cover and a sleeve for sodium charge, a system of degassing, intake and exhaust of argon, a system of control and maintaining of inert gas pressure inside the device. The device is equipped with condenser of excessive sodium connected to the reaction vessel. The reaction vessel is made in form of a vertical retort with ratio of diameter/height within ranges from 0.15 to 0.30, height over 800 mm and diameter over 200 mm with an expander in the upper part forming a circular chute. It contains a perforated collector of reduced product. The cover of the reaction vessel is made conic and is equipped with a potassium fluor-tantalate charge sleeve. The heating furnace of the reaction vessel is equipped with the sodium evaporation zone and zone of maintaining sodium in vaporous state.

EFFECT: eliminating tantalum powder contamination with reactor material impurities and also reduction of cost.

2 cl, 1 dwg, 1 tbl, 1 ex