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1. 发明专利

JPH06293905A PRODUCTION OF LOW PHOSPHORUS AND LOW SULFUR PIG IRON FOR CASTING 失效
公开(公告)号：JPH06293905A
公开(公告)日：1994-10-21
申请号：JP7961993
申请日：1993-04-06
申请人： KOBE STEEL LTD
发明人： KISHIMOTO MASANOBU , ITO RYOJI , FUKUSHIMA AKIRA , KATSUTA JUNICHIRO
IPC分类号： B22D1/00 , B22D5/02 , B22D43/00 , C21C1/00
摘要： PURPOSE:To improve the surface and the internal characteristics of a molded pig iron by arranging a slag stopper to an iron tapping hole of a molten iron receiving vessel, preventing flowing of dephosphorized slag into a molten iron casting trough and enhancing the effect of deoxidizer added in the molten iron casting trough. CONSTITUTION:At the time of pouring the molten iron 4 into the molten iron casting trough 2 by arranging the slag stopper 3 to the iron tapping hole of the molten iron receiving vessel 1, the flowing in of the dephosphorized slag 5 remained in the vessel 1 into the trough 2 is prevented. The deoxidizer (Al) 6 is added into the molten iron 4 poured in the trough 2 at 0.01-0.05% to the molten iron weight. Then, after executing sufficient deoxidation to the molten iron 4, molten iron is cast into a molten iron caster 10 to obtain a low phosphorus and low sulfur pig iron for casting improved in the surface and the internal characteristics of the molded pig iron.

2. 发明专利

JPS5594413A RECYCLING METHOD OF DESULFURIZATION BASE METAL 失效
公开(公告)号：JPS5594413A
公开(公告)日：1980-07-17
申请号：JP259379
申请日：1979-01-11
申请人： KOBE STEEL LTD
发明人： KITAMURA MINORU , KAWASAKI SHIYOUZOU , HAYASHI TSUTOMU , OOKUBO SEIJI , KISHIMOTO MASANOBU , HORI RIYUUICHI , MORITSUGI TAKEJI
IPC分类号： C21C1/02
摘要： PURPOSE:To recover the pig iron with desulfurizing slag which has hitherto been discarded by coarse-separating the pig iron deposited with desulfurizing slag produced at the outside desulfurization of molten iron then charging the same into the mixer car or the like prior to iron receiving and newly performing iron receiving and outside desulfurization. CONSTITUTION:Blast furnace iron is received in a mixer car or the like and desulfurizer and desulfurization accelerator are blown therein by using carrier gas to perform outside desulfurization of the molten iron. At this time, the temperature lowers owing to blowing of the carrier gas and the included blast furnace slag solidifies as desulfurization slag which then floats on the molten iron. The desulfurized molten iron is transferred to a mixing furnace and molten iron pan, by which it is carried to a steel making furnace such as converter. The solid desulfurization slag and deposited molten iron remained in the mixer car are discharged from the mixer car. The pig iron is coarse-separated from the solid desulfurization slag and is charged into an empty mixer car, into which is then newly received blast furnace iron and these are mixed and melted and are subjected to outside desulfurization operation. The pig iron which has hitherto been discarded together with the desulfurization slag is recovered.

3. 发明专利

JPS57156344A BLAST FURNACE SLAG BALLAS AGING TREATMENT 失效
公开(公告)号：JPS57156344A
公开(公告)日：1982-09-27
申请号：JP3985681
申请日：1981-03-19
申请人： KOBE STEEL LTD
发明人： NAKAMURA KENJIROU , KISHIMOTO MASANOBU , TOKUMOTO ICHIO , TAGAMI KENJI , ARAKAWA KANAME
IPC分类号： C04B5/00 , C21B3/04

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