公开(公告)号：US3867136A

公开(公告)日：1975-02-18

申请号：US40385473

申请日：1973-10-05

Applicant: UDDEHOLMS AB

Inventor： ERIKSSON LARS ANDERS ,  OBERG KARL-ERIK

IPC: C21C7/068 ,  C21C5/32

CPC classification number: C21C7/0685

Abstract: In a process for decarburising stainless steel by blowing the molten steel with a mixture of oxygen together with steam and/or ammonia, blockage of gas inlet is avoided by passing the mixture of oxygen together with steam and/or ammonia through the inner section of a tuyere comprising at least two coaxial pipes and passing through the outermost section of the tuyere a gas e.g. oxygen and steam or oxygen and nitrogen, which undergoes an exothermal reaction when it contacts the molten alloy.

Abstract translation: 在通过用氧气与蒸汽和/或氨的混合物吹入钢水来对不锈钢进行脱碳的方法中，通过将氧气混合物与蒸汽和/或氨通过其内部的一部分来避免气体入口的阻塞 所述风口包括至少两个同轴管，并且通过所述风口的最外部分，例如气体 氧气和蒸汽或氧和氮，当其接触熔融合金时，其经历放热反应。

公开(公告)号：US3898079A

公开(公告)日：1975-08-05

申请号：US40386073

申请日：1973-10-05

Applicant: UDDEHOLMS AB

Inventor： ERIKSSON LARS ANDERS

IPC: C21C5/34 ,  C21C5/28 ,  C21C5/46 ,  C21C7/068 ,  C22C33/00 ,  C21C5/32

CPC classification number: C21C5/4606 ,  C21C7/0685 ,  C22C33/00

Abstract: In a process for refining stainless steel where oxygen and ammonia are introduced into a molten steel, e.g. for decarburisation and/or introducing nitrogen into the steel, the ammonia is introduced separately from the oxygen through a tuyere comprising at least two co-axial pipes. The ammonia is preferably introduced through a pipe which is not an outermost pipe. This procedure reduces the risk of the melt solidifying around the ammonia pipe and avoids the need to use combustible oxygen/ammonia mixtures.

Abstract translation: 在用于精炼不锈钢的方法中，其中将氧和氨引入钢水中，例如， 为了对钢进行脱碳和/或引入氮气，氨通过包括至少两个同轴管的风口与氧气分开引入。 氨优选通过不是最外管的管引入。 该方法降低了氨管周围的熔体凝固的风险，避免了使用可燃性氧/氨混合物的需要。

公开(公告)号：US3867135A

公开(公告)日：1975-02-18

申请号：US29535572

申请日：1972-10-05

Applicant: UDDEHOLMS AB

Inventor： JOHNSSON HANS KLAS OLOF ,  ERIKSSON LARS ANDERS

IPC: C21C5/34 ,  C21C5/28 ,  C21C7/00 ,  C21C7/068 ,  C22B23/06 ,  C22C33/04 ,  C22C38/18

CPC classification number: C21C7/068 ,  C21C7/0685

Abstract: The carbon content in iron, cobalt, or nickel based alloys containing at least about 16 percent chromium is substantially eliminated without significant loss of chromium by blowing the alloy with oxygen to oxidise the carbon and simultaneously introducing steam or ammonia in amounts such that the partial pressure of carbon monoxide (formed by oxidation of carbon) is lower than that which corresponds to the equilibrium pressure for the carbon/chromium oxidation e.g. below 0.95 and preferably below 0.5 atmospheres.

Abstract translation: 含有至少约16％铬的铁，钴或镍基合金中的碳含量基本上消除，而不会因氧气而使碳合金氧化而同时引入蒸汽或氨，从而使得分压 的一氧化碳（由碳的氧化形成）低于对应于碳/铬氧化的平衡压力的一氧化碳，例如 低于0.95，优选低于0.5大气压。