Method of stripping base metals from fused salts

Details Method of stripping base metals from fused salts Method of stripping base metals from fused salts

1974-06-24

1977-07-26

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 63, 75 72, 75 82, 423561R, C21B 1500

Patent

active

040380661

ABSTRACT:
Base metal chlorides are recovered from fused alkali metal or alkaline earth metal halide salts by precipitation with at least one reagent selected from the group consisting of hydrogen, hydrogen sulfide or aluminum. Advantageously, the bulk of the base metals are precipitated by combinations of hydrogen sulfide and hydrogen to produce a precipitate having a controlled sulfur content that is molten at temperatures between about 750.degree. C. and 900.degree. C., and final salt cleaning is achieved by precipitating residual base metals with aluminum. The melting point of the precipitate is also controlled by the ratio of nickel to other base metals in the salt.

REFERENCES:
patent: 1737888 (1929-12-01), McIntosh
patent: 2990270 (1961-06-01), Lefever
patent: 3291597 (1966-12-01), Mellgren
patent: 3802870 (1974-04-01), Bell

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