초록 ▼

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,

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.

대표청구항 ▼

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: a refractory member engaging the po

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: a refractory member engaging the porous ceramic body and surrounding the first surface, the refractory member being substantially impervious to gas and having a coefficient of thermal expansion approximating that of the porous ceramic body.