Producing titanium particulates from in situ titanium-zinc inter

Details Producing titanium particulates from in situ titanium-zinc inter Producing titanium particulates from in situ titanium-zinc inter

1990-10-11

1993-01-05

Roy, Upendra

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

75338, 75359, 423 85, B22F 900

Patent

active

051767414

ABSTRACT:
A process for producing salt free titanium powder by reacting zinc and a titanium halide in the presence of a reducing agent to form a solid zinc titanium product. Titanium halide vapor is introduced into a liquid alloy of zinc and the reducing agent at a temperature between 650.degree.-907.degree. C. The titanium halide is introduced beyond the titanium solubility limit in zinc to precipitate a zinc titanium intermetallic compound and also produce a liquid halide salt. The intermetallic compound forms and accumulates at an interface between the salt and liquid alloy. The compound is periodically removed from the interface, crushed into a powder, and the zinc is evaporatively separated from the titanium to produce pure titanium powder. The process preferably occurs above the peritectic decomposition temperature of Zn.sub.3 Ti, and most preferably above the peritectic decomposition temperature of Zn.sub.2 Ti, to maximize the titanium content of the resulting product.

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