发明授权
- 专利标题: Steelmaking with inert gas blowing
- 专利标题(中): 炼钢与惰性气体吹
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申请号: US509223申请日: 1974-09-25
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公开(公告)号: US3940263A公开(公告)日: 1976-02-24
- 发明人: Bartolomeo Morello
- 申请人: Bartolomeo Morello
- 专利权人: Bartolomeo Morello
- 当前专利权人: Bartolomeo Morello
- 优先权: IT52724/73 19730925
- 主分类号: C21C5/00
- IPC分类号: C21C5/00 ; C21C5/30 ; C21C5/38 ; C21C7/00 ; C21C7/068 ; C21C7/072 ; F25J3/04
摘要:
An oxygen steelmaking process utilizing also an inert gas to reduce the oxidation of a desired element such as chromium while permitting a desirably low carbon level to be reached, is characterized by recovery and recycling of the inert gas for economy. The inert gas is preferably argon and is preferably recovered by fractional distillation so as to reduce the nitrogen in the cycle stream and to recover and store and mix and reuse the argon and oxygen as desired. After removal of dust and carbon dioxide from the effluent gases from the converter, and prior to fractionation, 10-30% of the effluent gas is mixed with a minor part of the recovered oxygen and blown beneath the hood to limit air aspiration and to aid in the combustion of CO.