Title: Casting steel ingots

Abstract: In the bottom pouring of steel ingots, the molten steel is teemed into a trumpet or upstanding runner and passes from the trumpet through a horizontal runner and up into an ingot mould. Inert gas is injected into the molten steel as it passes downwardly through the trumpet so that bubbles are formed in the steel, which bubbles assist in the removal of non-metallic inclusions. This process is used in the manufacture of steel ingots of very low non-metallic inclusion content and low total oxygen content.

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Inventors: Barker, Rodney (Sheffield, EN)

Application Number: 582789
Filing Date: 1975-06-02
Publication_date: 1976-12-21
Assignee: British Steel Corporation (London, EN)
Primary Class(es): 164/66.1 164/134
Other Classes:
US Patent Ref:

1583248	May, 1926	Durville	164/133.
1814584	Jul, 1931	Bost et al.	164/56.
3392009	Jul, 1968	Holmes et al.	164/66.
3400752	Sep, 1968	Unsworth	164/66.
3621903	Nov, 1971	Doi et al.	164/66.
3672432	Jun, 1972	Widdowson et al.	164/133.
3810506	May, 1974	Kobayashi	164/133.
3880221	Apr, 1975	Bolevski et al.	164/66.

Other Refs: 1,293,98738-1660945-20574

Mar, 1961	FR
Feb, 1963	JA
Mar, 1967	JA

Primary Examiner: Shore, Ronald J.
Assistant Examiner:
Attorney: Bacon & Thomas