专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明专利

JP2002060827A METHOD FOR MELTING STAINLESS STEEL 失效
公开(公告)号：JP2002060827A
公开(公告)日：2002-02-28
申请号：JP2000250623
申请日：2000-08-22
申请人： DAIDO STEEL CO LTD
发明人： HAYAISHI MASAKAZU
IPC分类号： C21C7/072 , C21C5/52
摘要： PROBLEM TO BE SOLVED: To provide a method for melting a stainless steel by which stainless steel scale (SUS scale) produced in the step of rolling can be reused as steelmaking raw material and the more SUS scale can be treated without bringing about such danger as the over-flow of the slag frequently developed in the case of using Telstar (aluminum dust), in a method for producing the stainless steel with the melting of scrap in an electric furnace and a subsequent AOD treatment. SOLUTION: The melting of the stainless steel as the preceding step of the AOD treatment is performed according to the following processes: (1) an initial charging (scrap, CaO, ferro-silicon, recarburizer and SUS scale),-power-supply and melting, (2) a supplementary charging (scrap and SUS scale), (3) the addition of reducing agent (ferro-silicon and Telstar) and melt-down, (4) the power-supply and heat-up, (5) the addition of ferro-silicon and the blowing of oxygen and (6) the steel tapping-off.

22. 发明专利

JP2002243373A BASE METAL REMOVING APPARATUS 失效
公开(公告)号：JP2002243373A
公开(公告)日：2002-08-28
申请号：JP2001037519
申请日：2001-02-14
申请人： DAIDO STEEL CO LTD
发明人： ICHIKAWA KAZUO , HAYAISHI MASAKAZU
IPC分类号： C21C5/46 , C21C7/00 , C21C7/10 , F27D25/00 , F27D23/02
摘要： PROBLEM TO BE SOLVED: To enable ore adhered to a lid of a refining vessel to be easily removed by splash without producing any dangerous condition. SOLUTION: A table lifter 107 is rotatably arranged in a horizontal plane on a boggie 100. An arm 123 is arranged at one side edge of a top plate of the table lifter in such a way that it can be raised or inclined under an operation of a hydraulic cylinder 124, and at the same time the extremity end of the arm is provided with a vibration bit 133 which can be raised or inclined under an operation of a hydraulic cylinder 128.

23. 发明专利

JP2002212625A METHOD FOR DECARBURIZING MOLTEN CHROMIUM-CONTAINING STEEL 失效
公开(公告)号：JP2002212625A
公开(公告)日：2002-07-31
申请号：JP2001008530
申请日：2001-01-17
申请人： DAIDO STEEL CO LTD
发明人： KUBO SHINJI , HAYAISHI MASAKAZU
IPC分类号： C21C7/068 , C21C7/00 , C21C7/076 , C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide a method for decarburizing a molten chromium-containing steel by which the necessary decarburizing time can be shortened. SOLUTION: In the method for decarburizing the molten chromium-containing steel under reduced pressure after decarburizing under atmospheric pressure, when the decarburization under reduced pressure is carried on, slag-forming material is charged into the molten chromium-containing steel.

你已经成功收藏专利！

检索式保存成功!

IPRDB