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US 4,973,433 AGranted
Apparatus for injecting gas into molten metal
AssigneeThe Carborundum Company
InventorsRonald E. Gilbert, Harvey Martin, George S. Mordue
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AssigneeThe Carborundum Company
InventorsRonald E. Gilbert, Harvey Martin, George S. Mordue
Estimating the term…
Apparatus for injecting gas into molten metal includes a porous ceramic body having a first surface through which gas can be introduced into the body, and a second surface through which gas can flow from the body. A refractory member is attached to the body and surrounds at least the first surface, while leaving the second surface exposed. The refractory member is impervious to gas, while having a coefficient of thermal expansion approximating that of the body. Preferably, a refractory sealant securely attaches the refractory member to the body. By use of the present invention, the refractory member and the body remain tightly connected to each other at all times. Accordingly, gas leaks are prevented and all gas flowing into the body is discharged through the second surface, as desired.
In a gas injector having a porous ceramic body with a first surface through which gas can be introduced into the body, and a second surface spaced from the first surface, the second surface permitting gas to be discharged from the body, the improvement comprising:
Gas injection apparatus, comprising:
Dependencies are inferred from the claim text.