Gas treatment of molten metal, gas injected into melt using rotors in reaction chamber held under partial vacuum

摘要

Molten metal is treated with gas and/or particulate material in a reactor 11. The gas or particulate material is supplied through rotors 5. Additional gas may be supplied through porous plug 8. A partial vacuum is maintained in the space above the molten metal. The vacuum assists in the degassing of the molten metal. The rotors may depend from the top of the reactor, as shown, or may be placed in the sides or base of the reactor.