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1. 发明专利

JPH08120320A METHOD FOR SETTING CHARGING QUANTITY OF ALUMINUM IN SECONDARY REFINING 失效
公开(公告)号：JPH08120320A
公开(公告)日：1996-05-14
申请号：JP25522194
申请日：1994-10-20
申请人： NIPPON STEEL CORP
发明人： KUWAJIMA SHUJI , TSUCHIDA HIDENORI , IMOTO KOICHI , TOKUNAGA FUMINORI
IPC分类号： C21C7/04 , C21C7/06
摘要： PURPOSE: To improve the hitting accuracy of the total Al and to reduce the consumption of Al by reflecting the actual result of the Al adding yield in the previous process at each Al adding process, using the fine predicting function of the time and obtaining the Al adding quantity. CONSTITUTION: The Al is added to execute deoxidizing treatment and the secondary refining of the molten steel is executed. At this time, in the method for deciding the Al charging quantity, the actual result of the Al adding yield in the previous process is taken at each Al adding process, and the Al adding quantity is obtd. by predicting the treating time and the staying time at each process. The Al addition is suitably executed by a system based on this adding quantity.

2. 发明专利

JPH058002A QUALITY ASSURANCE METHOD OF CAST SLAB HAVING JOINT PART OF DIFFERENT KINDS OF STEELS 失效
公开(公告)号：JPH058002A
公开(公告)日：1993-01-19
申请号：JP18957591
申请日：1991-07-04
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI HIROMI , TSUTSUMI KAZUHIKO , IMOTO KOICHI , KUBO KATSUHIKO
IPC分类号： B22D11/128 , B22D11/08 , B22D11/10 , B22D11/16
摘要： PURPOSE:To provide quality assurance method for cast slab, which a joint part of different kinds of steels is made to be the min. in the case of executing sequentially continuous casting to the different kinds of steels and the yield is improved in the continuous casting. CONSTITUTION:In the sequentially continuous casting method for the different kinds of steels by using a mixture preventing iron plate 11 in the continuous casting method for steel pouring into a mold from a tundish through an immersion nozzle and drawing the cast slab with pinch rolls, by calculating piping length 12 from the stopping time of pinch rolls to decide cut-off length of the joint part, the quality assurance method of slab having the joint part of the different kinds of steels is obtd. The joint part of the different kinds of steel is made to be the min. to reduce the wasted joint part and the yield of cast slab is improved and the internal defect is prevented to establish the quality assurance at the joint part.

3. 发明专利

JPH07204815A METHOD FOR ADJUSTING REQUEST SPECIFICATION OF CAST SLAB 失效
公开(公告)号：JPH07204815A
公开(公告)日：1995-08-08
申请号：JP135394
申请日：1994-01-11
申请人： NIPPON STEEL CORP
发明人： KUWAJIMA SHUJI , IMOTO KOICHI , ISHIKAWA YUKIO
IPC分类号： B22D11/10 , B22D11/103 , B22D11/119 , B22D11/14 , B22D11/16
摘要： PURPOSE:To provide a method for adjusting a request specification of a cast slab, by which after casting charge and a molten steel ladle to be used are tied up, the specification of the charge is adjusted to reduce non-adopted slab or the adopted slab out of the request. CONSTITUTION:In the method for deciding the specification of the cast slab in a continuous casting, at the time of tying up the charge and the molten steel ladle to be used, it is checked wether the initial requested good steel quantity for cast slab is in the range of the permissible good steel quantity of this molten steel ladle or not. In the case of out of the range, the specification of the cast slab is adjusted between the charges so as to come in the range of the permissible good steel quantity of the molten steel ladle of the same kind steel as this charge and the charge in the same casting in the range of no problem on the cast slab width and the quality level, etc.

4. 发明专利

JPH0592241A CONTINUOUS CASTING METHOD FOR DIFFERENT KINDS OF STEELS 失效
公开(公告)号：JPH0592241A
公开(公告)日：1993-04-16
申请号：JP27636491
申请日：1991-09-30
申请人： NIPPON STEEL CORP
发明人： IMOTO KOICHI , NAKAMURA YUKIO , OKUDA TSUKASA , TSUTSUMI KAZUHIKO
IPC分类号： B22D11/00 , B22D11/08 , B22D11/10 , B22D11/103 , B22D11/119
摘要： PURPOSE:To reduce a molten steel quantity remaining between lower weirs by providing a pair of the lower weirs at the center bottom part in the inner part of a tundish, a raising bottom part on an area surrounded by the weirs and a groove on a part coming into contact with the poured molten steel in an initial stage in the raising bottom part. CONSTITUTION:The molten steel is poured into the tundish 10 from a ladle 1 through a long nozzle 2 and further into a mold 9 from the tundish 10 through an immersion nozzle 8. In the bottom of the tundish 10 at the center part between the lower weirs 5, the raising bottom part 6a is provided to reduce the residual molten steel remaining at the lower weirs 5. At the part being in contact with the poured molten steel in the initial stage in the raising bottom part 6a, the groove 6b is provided to be a pouring basin part for preventing the spattering of the molten steel in the initial stage of pouring stream.

5. 发明专利

JPH08157925A DECISION OF BLENDING QUANTITY OF SCRAP FOR CONVERTER 失效
公开(公告)号：JPH08157925A
公开(公告)日：1996-06-18
申请号：JP30101194
申请日：1994-12-05
申请人： NIPPON STEEL CORP
发明人： KUWAJIMA SHUJI , IMOTO KOICHI
IPC分类号： C21C5/28
摘要： PURPOSE: To increase the quantity of used scrap of low cost to reduce the production cost by systemizing the instruction of scrap blending ratio, finely and concretely preparing the working instruction on description and quantity when deciding the scrap blending quantity for a converter. CONSTITUTION: At the time of supplying two kinds of scraps, one of which is inexpensive, light in weight and bulky and the other is expensive, heavy in weight and small in vol., the scrap blending quantity is decided so as to charge the inexpensive scrap with priority within a permissible quantity based on the charging permissible quantity decided from the loading time, cost and steel quality by each description of the scraps. Successively, the total loading time is obtd. based on the loading time every description of the scrap. The scrap blending ratio is adjusted so that the total loading time is within the possible scrap loading time decided from the blowing schedule of the converter, and the corrected inexpensive scrap blending quantity is decided.

6. 发明专利

JPH08157923A METHOD FOR DECISION OF CHARGING QUANTITY OF MAIN RAW MATERIAL FOR CONVERTER 失效
公开(公告)号：JPH08157923A
公开(公告)日：1996-06-18
申请号：JP30101294
申请日：1994-12-05
申请人： NIPPON STEEL CORP
发明人： KUWAJIMA SHUJI , IMOTO KOICHI
IPC分类号： C21C5/28
摘要： PURPOSE: To improve estimation accuracy, productivity and yield by correcting the estimated molten steel quantity from every informations obtd. in the process of operation from a converter to a continuous casting. CONSTITUTION: The necessary steel tapping quantity of the converter is obtd. based on the necessary molten steel quantity obtd. by adding the estimated loss scrap quantity in the continuous casting process to the necessary cast slab wt. by adding the estimated alloy charging quantity and coolant and the estimated loss quantity of stuck metal in a secondary refining process. On the other hand, a multiple regression analysis is executed on the difference between the estimated yield composed of molten steel increasing factors such as auxiliary material quantity, cooling material quantity and alloy charging quantity and molten steel decreasing factors such as slopping, combustion loss, metal sticking to obtain the contributing rate of the each factor. The estimated value of each of the increasing and decreasing factors is obtd., and further, the estimated molten steel yield is obtd. from a multiple regression equation and the main raw material charging quantity for the converter is decided from the necessary tapping steel quantity in the converter and the estimated molten steel yield.

7. 发明专利

JPH09174390A WORK INDICATION AND SUPPORT SYSTEM ACCORDING TO DOCUMENT 失效
公开(公告)号：JPH09174390A
公开(公告)日：1997-07-08
申请号：JP33319595
申请日：1995-12-21
申请人： FUJITSU LTD , NIPPON STEEL CORP , SHINNITTETSU JOHO TSUSHIN SYST
发明人： HONJO SHIGEAKI , KUWAJIMA SHUJI , IMOTO KOICHI , URAGAMI TAKEHISA , MOTOKI KOHEI , INOUE MICHIHIRO
IPC分类号： B23P21/00 , B23Q41/08 , B65G61/00 , G05B19/418 , G05B23/02 , G06Q10/10 , G06Q50/00 , G06Q50/04 , G06F17/60
摘要： PROBLEM TO BE SOLVED: To reduce load applied to a worker at a production spot and surely provide a proper work standard document by receiving a retrieved work standard document, transmitting it to each corresponding step terminal unit, and providing delivering means for presentation to a user. SOLUTION: According to product information of each step collected by product information collection means 101 retrieval means 112 and signal transmitting or delivering means 113 are actuated, and then a work standard document relating to a step where a product indicated by the product information is processed next is automatically retrieved from a work standard library 111 and it us transmitted to a terminal unit 102. The work standard document retrieved by the retrieving means 112 is received and it is delivered to a corresponding step terminal unit 102 through the transmitting means 113, and it is thereby indicated to a worker.

8. 发明专利

JPH0847761A METHOD FOR DETERMINING TREATMENT NEAR JOINT OF SLAB 失效
公开(公告)号：JPH0847761A
公开(公告)日：1996-02-20
申请号：JP18456694
申请日：1994-08-05
申请人： NIPPON STEEL CORP
发明人： KUWAJIMA SHUJI , TAKAHASHI TAKAHARU , IMOTO KOICHI , ISHIKAWA YUKIO
IPC分类号： B22D11/10 , B22D11/126 , B22D11/16
摘要： PURPOSE:To reduce the unnecessary increase of the scarf processes or the amount of the degraded stab by rating the quality by the slab length of the scarf material of the prescribed region. CONSTITUTION:In a method for determining the treatment of the part near the slab joint in the continuous casting, the affected length due to the joint by the component mixture and the unstation zone inclusion is confirmed, and the increase of the scarf processes or the amount of the degraded slab is reduced by specifying the length of the slab at the joint part and the quality rating by the component mixture and the non-stationary inclusion. The region of the middle slab is expanded by changing the control from the control of the relative position by the slab unit to the length control, and the adjustment margin to obtain the middle slab is increased at the time point of the casting arrangement and the continuous casting, and the sampling yield is improved.

9. 发明专利

JPH07204816A METHOD FOR REQUESTING MATERIAL OF CAST SLAB 失效
公开(公告)号：JPH07204816A
公开(公告)日：1995-08-08
申请号：JP135494
申请日：1994-01-11
申请人： NIPPON STEEL CORP
发明人： KUWAJIMA SHUJI , IMOTO KOICHI , ISHIKAWA YUKIO
IPC分类号： B22D11/10 , B22D11/103 , B22D11/119 , B22D11/16
摘要： PURPOSE:To provide a deciding method for requesting length of a jointed cast slab so as to minimize the fluctuation of the joining length of the cast slab generated by the fluctuation, etc., of molten steel quantity in a molten steel ladle. CONSTITUTION:In the requesting method for material quality of the cast slab in a continuous casting, the fluctuation of the good steel quantity/charge for minimizing the jointed part producing ratio is previously obtd. from the relation of the fluctuation of the good steel quantity/charge and the jointed part producing ratio. Then, the cast slab length corresponding to the fluctuation of the good steel quantity/charge minimizing the jointed producing ratio is added to the jointed part length obtd. from the casting conditions of the component difference between the previous charge and the following charge, the remaining molten steel quantity in a tundish, the cross sectional surface size of the cast slab, etc., to obtain the requesting length of the jointed part in the cast slab.

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