Method for stably refining high carbon steel
US4398949A · kind A · utility
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5Claims
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Key dates
| Filing date | Oct 28, 1981 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Oct 28, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C5/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for stably refining high carbon steel by top and bottom blown converter refining in which the entire quantity or part of refining pure oxygen is blown onto molten iron through a top blowing lance nozzle while blowing an inert gas into the converter through a nozzle at the bottom thereof, and wherein the bottom blown inert gas is fed at a rate less than 0.09 Nm.sup.3 /min.multidot.ton during the blowing and/or at a rate less than 0.03 Nm.sup.3 /min.multidot.ton in a controlling stage immediately after turndown.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.