Converter oxygen blowing method and upward blowing lance for converter oxygen
A method for blowing oxygen in a converter uses a top-blown lance having a Laval nozzle installed on its tip. The Laval nozzle has a back pressure of the nozzle Po(kPa) satisfying a formula, Po=Fhs/(0.00465.Dt ), with respect to a oxygen-flow-rate Fhs(Nm /hr) per hole of the Laval nozzle determined...
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| Main Authors | , , |
|---|---|
| Format | Patent |
| Language | English |
| Published |
25.05.2005
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| Edition | 7 |
| Subjects | |
| Online Access | Get full text |
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| Abstract | A method for blowing oxygen in a converter uses a top-blown lance having a Laval nozzle installed on its tip. The Laval nozzle has a back pressure of the nozzle Po(kPa) satisfying a formula, Po=Fhs/(0.00465.Dt ), with respect to a oxygen-flow-rate Fhs(Nm /hr) per hole of the Laval nozzle determined from the oxygen-flow-rate Fs(Nm /hr) in . a high carbon region in a peak of decarburization and a throat diameter Dt(mm) . An exit diameter De of the Laval nozzle satisfies the following formula with respect to the back pressure of the nozzle Po(kPa), an ambient pressure Pe(kPa), and the throat diameter Dt(mm). De </= 0.23xDt /ä(Pe/Po)<5/7>xÄ1-(Pe/po)<2/7>Ü<1/2>ü |
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| AbstractList | A method for blowing oxygen in a converter uses a top-blown lance having a Laval nozzle installed on its tip. The Laval nozzle has a back pressure of the nozzle Po(kPa) satisfying a formula, Po=Fhs/(0.00465.Dt ), with respect to a oxygen-flow-rate Fhs(Nm /hr) per hole of the Laval nozzle determined from the oxygen-flow-rate Fs(Nm /hr) in . a high carbon region in a peak of decarburization and a throat diameter Dt(mm) . An exit diameter De of the Laval nozzle satisfies the following formula with respect to the back pressure of the nozzle Po(kPa), an ambient pressure Pe(kPa), and the throat diameter Dt(mm). De </= 0.23xDt /ä(Pe/Po)<5/7>xÄ1-(Pe/po)<2/7>Ü<1/2>ü |
| Author | SUMI IKUHIRO KIKUCHI YOSHITERU KAWABATA RYO |
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| Notes | Application Number: CN20018003740 |
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| RelatedCompanies | JEFFRY IRON & STEEL CO. LTD |
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| Snippet | A method for blowing oxygen in a converter uses a top-blown lance having a Laval nozzle installed on its tip. The Laval nozzle has a back pressure of the... |
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| SubjectTerms | CHEMISTRY METALLURGY METALLURGY OF IRON PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS |
| Title | Converter oxygen blowing method and upward blowing lance for converter oxygen |
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