Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1983-08-12
1985-04-23
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
266216, C21C 700
Patent
active
045128006
ABSTRACT:
An apparatus for adding wire-form processing elements directly into a molten material, comprising: a heat resistant nozzle positionable relative to the surface of the molten material such that an inlet is disposed above the surface and an outlet is disposed beneath the surface; a mechanism for feeding the wire through the nozzle directly into the molten material; and a system for injecting a substantially inert gaseous medium into the molten material together with the wire, whereby the inert gas substantially prevents closure of the nozzle by solidified molten material and promotes mixture of the processing elements with the molten material through gas bubble agitation. The apparatus further comprises a substantially gas-tight conduit connected to the nozzle inlet, through which the wire and the inert gaseous medium are delivered to the nozzle. A pressure-driven seal prevents atmospheric contamination and prevents loss of inert gas. Passing the wire and gaseous medium through a bore in the nozzle having an elongated, gradually tapered funnel-shaped section adjacent the outlet maximizes the effect of the inert gaseous medium.
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Akers Lawrence C.
Knuth Charles J.
Pfizer Inc.
Richardson Peter C.
Rosenberg Peter D.
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