Furnace valve

Claim 2

A valve for controlling the rate of discharge of a melt from a furnace, comprising: a water cooled sleeve having an inner tubular wall and an outer wall, a water cooling space between the inner and outer walls, and conduit connection means forming inlet and outlet ports to said water cooling space, a carbon member carried by the sleeve and having a flow passage extending therethrough, said carbon member being a liner having a stem portion which is contained within the sleeve and an enlarged head which abuts the outer end of the sleeve and forms substantially the terminal end of the flow passage, and a shutter, and guide means controlling the shutter for movement across the outer face of said enlarged head to control the effective discharge area of said flow passage.

Claim 3

A valve for controlling the rate of discharge of a melt from a furnace, comprising: a water cooled sleeve having an inner tubular wall and an outer wall, a water cooling space between the inner and outer walls, and conduit connection means forming inlet and outlet ports to the water cooling space; a carbonaceous member carried by the sleeve and having a flow passage extending therethrough, said carbonaceous member being a liner having a stem portion which is contained within the sleeve and an enlarged head which abuts the outer end of the sleeve; and a pivot pin secured with respect to said water cooled sleeve, a shutter pivotally mounted at one of its ends on said pivot pin, walls defining a slot in the other end of said shutter, a guide pin also secured with respect to said sleeve and extending through said slot, and spring means on said guide pin applying pressure to said shutter restraining movement of said shutter and urging said shutter into contact with the outer face of said enlarged head.

Claim 4

A valve for controlling the rate of discharge of a melt from a furnace, comprising: a water cooled sleeve having an inner tubular wall and an outer wall, a water cooling space between the inner and outer walls, and conduit connection means forming inlet and outlet ports to the water cooling space; a carbonaceous member carried by the sleeve and having a flow passage extending therethrough, said carbonaceous member being a liner having a stem portion which is contained within the sleeve and an enlarged head which abuts the outer end of the sleeve; and a pivot pin secured with respect to said water cooled sleeve, a shutter pivotally mounted at one of its ends on said pivot pin, walls defining a slot in the other end of said shutter, a guide pin also secured with respect to said sleeve and extending through said slot, and spring means on said guide pin applying pressure to said shutter restraining movement of said shutter and urging said shutter into contact with the outer face of said enlarged head.

Claim 5

A valve for controlling the rate of discharge of a melt from a furnace, comprising: a water cooled sleeve having an inner tubular wall and an outer wall, a water cooling space between the inner and outer walls, and conduit connection means forming inlet and outlet ports to said water cooling space; a carbonaceous member carried by the sleeve and having a flow passage extending therethrough, said carbonaceous member being a liner having a stem portion which is contained within the sleeve and an enlarged head which abuts the other end of the sleeve; an outstanding mounting flange intermediate the ends of the water cooled sleeve and having securing means for securing the sleeve to a furnace wall, a pivot pin and a guide pin both extending from said flange; and a shutter comprising inner and outer plates joined together by inner and outer tubes thereby defining between them a shutter water cooling space, shutter conduit connection means forming inlet and outlet ports to said shutter mounting plate pivotally engaging said pivot pin at one of its ends and having walls at the other end defining a slot, said guide pin extending through said slot and limiting pivotal movement of the shutter, and a lever arm coupled to the shutter for controlling said pivotal movement.

Claim 6

A valve for controlling the rate of discharge of a melt from a furnace, comprising: a water cooled sleeve having an inner tubular wall and an outer wall, a water cooling space between the inner and outer walls, and conduit connection means forming inlet and outlet ports to said water cooling space; a carbonaceous member carried by the sleeve and having a flow passage extending therethrough, said carbonaceous member being a liner having a stem portion which is contained within the sleeve and an enlarged head which abuts the other end of the sleeve; an outstanding mounting flange intermediate the ends of the water cooled sleeve and having securing means for securing the sleeve to a furnace wall, a pivot pin and a guide pin both extending from said flange; and a shutter comprising inner and outer plates joined together by inner and outer tubes thereby defining between them a shutter water cooling space, shutter conduit connection means forming inlet and outlet ports to said shutter mounting plate pivotally engaging said pivot pin at one of its ends and having walls at the other end defining a slot, said guide pin extending through said slot and limiting pivotal movement of the shutter, and a lever arm coupled to the shutter for controlling said pivotal movement.

Claim 7

A valve according to claims 2 or 3 wherein the material of the carbonaceous member is carbon.

Claim 8

A valve according to claims 1 or 2 wherein the shutter has walls defining a shutter water cooling space, and shutter conduit connection means form inlet and outlet ports to said shutter water cooling space.

Claim 9

A valve according to claims 1 or 2 wherein said water-cooled sleeve has an outstanding mounting flange intermediate its ends, and having securing means for securing the sleeve to a furnace wall.

Claim 10

A valve according to claims 1 or 2 or 3 wherein the furnace is an electric furnace.

Claim 11

A valve according to anyone of claims 1 or 2 or 3 wherein the shutter movement is substantially in the plane of the outer face of the enlarged head.