METHOD TO PRODUCE HIGH-PURITY NICKEL FOR DISPERSED TARGETS AND DEVICE TO THIS END Russian patent published in 2009 - IPC C22B23/00 C22B5/12 C22B9/16 

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy. Proposed method comprises zone chlorination of nickel metal in gaseous chlorine flow at 940 to 970°C to produce nickel chloride powder. Then, one-stage sublimation of nickel chlorides powder in atmosphere of humid argon at 940 to 970°C is carried out to produce nickel chloride vapors. After sublimation, homogeneous recovery of nickel chloride vapors is performed in dehydrated hydrogen flow at 950 to 980°C and hydrogen-to-argon-flow rate ratio of 1:2-1:3 to produce foil and recovered nickel crystals. Now, said foil and crystals are pressed and vacuum zone re-crystallization is effected to produce ingots. The latter are remelted in cooled flat crystalliser in vacuum to produce flat ingot to be remelted on both sides for complete depth, at least, two times. Invention covers also device to produce nickel chloride powder for dispersed targets and device for sublimation and homogeneous recovery of nickel chloride.

EFFECT: sharp increase in nickel purity.

4 cl, 2 dwg, 1 tbl, 1 ex