Process for degassing aluminum melts with sulfur hexafluoride

Details Process for degassing aluminum melts with sulfur hexafluoride Process for degassing aluminum melts with sulfur hexafluoride

1988-09-28

1990-09-25

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

420532, 420533, 420541, 420542, C22B 2106

Patent

active

049591010

ABSTRACT:
Aluminum and aluminum alloy melts are purified by removing entrained gaseous impurities and solid particulate impurities, primarily aluminum oxides, by bubbling a non-corrosive intimate mixture of sulfur hexafluoride in an inert gas. Magnesium levels, if present, are not significantly reduced. The process is reliable and the gas mixture safe for aluminum purifying operations and procedures.

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