A METHOD FOR MANUFACTURING A STEEL INGOT
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United States of America Patent
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Issued Date -
Jun 16, 2022
app pub date -
Mar 20, 2020
filing date -
Mar 20, 2020
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Abstract
A method for manufacturing a steel ingot in a casting arrangement (100) comprising a vacuum vessel (110); an ingot mold (120) arranged within the vacuum vessel and a stirrer (130) arranged to stir liquid steel in the ingot mold, comprising: -providing (1000) a liquid steel melt; filling (2000) the ingot mold (100) with the liquid steel melt; applying (3000) a reduced pressure within the vacuum vessel (110); allowing the liquid steel melt to solidify into an ingot; allowing the liquid steel melt to solidify under stirring within the ingot mold at a reduced pressure during solidification of the steel melt; wherein, the liquid steel melt comprises a predetermined amount of carbon and; incidental impurity elements in the form of oxides, wherein during stirring the oxides are reduced by carbothermic reaction in which oxygen in the oxides and carbon in the steel melt form carbon-monoxide.
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