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1. US4706944 - Stopper for use in molten metal handling

Office
United States of America
Application Number 06827931
Application Date 10.02.1986
Publication Number 4706944
Publication Date 17.11.1987
Grant Number 4706944
Grant Date 17.11.1987
Publication Kind A
IPC
C21C 5/48
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
5Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel
28Manufacture of steel in the converter
42Constructional features of converters
46Details or accessories
48Bottoms or tuyères of converters
B22D 41/14
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
41Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
14Closures
B22D 41/18
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
41Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
14Closures
16stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
18Stopper-rods therefor
B22D 41/50
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
41Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
50Pouring-nozzles
B22D 41/58
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
41Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
50Pouring-nozzles
58with gas injecting means
CPC
B22D 41/58
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
41Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
50Pouring-nozzles
58with gas injecting means
B22D 41/186
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
41Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
14Closures
16stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
18Stopper-rods therefor
186with means for injecting a fluid into the melt
Applicants Thor Ceramics Limited
Inventors Lee Stephen J.
Agents Ferguson Gerald J.
Hoffman Michael P.
Foycik Michael J.
Priority Data 8411596 05.05.1984 GB
Title
(EN) Stopper for use in molten metal handling
Abstract
(EN)

A stopper comprising a monoblock refractory body having a gas duct formed longitudinally within the body wherein the said duct extends through the nose of the stopper to an intermediate region within the length of the stopper at which region the duct is sealed by a gas-impermeable plug to prevent gas leakage from the duct through the stopper beyond said region, and wherein said duct and an integral narrow gas supply channel extending from said port to a gas supply inlet on the outside surface of the stopper adjacent the opposite end of the stopper from the nose.

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