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1. 发明专利

JPS6254012A ELECTRIC FURNACE AND ITS OPERATING PROCEDURE 失效
公开(公告)号：JPS6254012A
公开(公告)日：1987-03-09
申请号：JP19184885
申请日：1985-09-02
申请人： NISSHIN STEEL CO LTD
发明人： CHIKAMA TSUGIO , KAMEYAMA EIHIKO , KOREYASU MASAHIRO
IPC分类号： F27B3/08 , C21C5/52
摘要： PURPOSE:To prevent the damage of the water-cooled wall of an electric furnace as well as the loss of arc heat by fixing plural spouting nozzles for obliquely spouting gas toward the surface of molten metal under the nozzles to scatter molten slag in all directions in the water-cooled wall. CONSTITUTION:An electric furnace is composed of the body 1, a lid 4 and plural electrodes 5 placed through the lid 4. The body 1 has a water-cooled wall 3 on the periphery of a molten metal reservoir 2 having a tap hole 2a. Plural spouting nozzles 6 are fixed in the wall 3 and molten slag 7 is scattered by obliquely spouting gas from the nozzles 6 toward the surface of molten metal under the nozzles 6 to form a slag film on the whole surface of the wall 3.

2. 发明专利

JPS56130452A FERROALLOY CUTTING-OUT METHOD 失效
公开(公告)号：JPS56130452A
公开(公告)日：1981-10-13
申请号：JP3159680
申请日：1980-03-14
申请人： NISSHIN STEEL CO LTD
发明人： KOREYASU MASAHIRO
IPC分类号： C22C33/04 , C22C33/06 , F27D3/10
摘要： PURPOSE:To enhance the cutting-out efficiency of ferroalloy in a steel making process and control the amount of ferroalloy cut-out to optimum conditions by comparing the added value of the head weight of ferroalloy and the weight of ferroalloy stacked in a hopper to a set feed weight value and stopping an electromagnetic feeder when the values coincide with each other. CONSTITUTION:The amount of ferroalloy 5 to be fed is set E, and set weight value Wo is read with reading program H. Starting button 8 for electromagnetic feeder 2 is pushed in accordance with the brand of ferroalloy 5 to excite power source 3 for strongly oscillating feeder 2 with starting program J. At the same time, weight W after weighting 7 is converted A and inputted to calculate K average feeding speed V every moment. On the other hand, height (h) of ferroalloy 5 cut-out and stacked in hopper 6 is calculated L from the output of the weighing machine, and weight W1 of unweighed ferroalloy 5 existing in head H1(=h0-h) is calculated M by the equation. The added value of actual weight W in hopper 6 and estimated weight W1 is compared to set value Wo' with judging program N to stop feeder 2 or repeat the operations after aclculation K.

3. 发明专利

JPH0464156B2 失效
公开(公告)号：JPH0464156B2
公开(公告)日：1992-10-14
申请号：JP13286184
申请日：1984-06-29
申请人： NISSHIN STEEL CO LTD
发明人： KOREYASU MASAHIRO , NAKAGAWA TAKUO
IPC分类号： H05B7/148

4. 发明专利

JPS6237896A REACTIVE POWER COMPENSATION CONTROLLER FOR STEEL MAKING ARC FURNACE 失效
公开(公告)号：JPS6237896A
公开(公告)日：1987-02-18
申请号：JP17574585
申请日：1985-08-12
申请人： NISSHIN STEEL CO LTD
发明人： KOREYASU MASAHIRO
IPC分类号： H05B7/148

5. 发明专利

JPS6220273B2 失效
公开(公告)号：JPS6220273B2
公开(公告)日：1987-05-06
申请号：JP3159680
申请日：1980-03-14
申请人： NISSHIN STEEL CO LTD
发明人： KOREYASU MASAHIRO
IPC分类号： C22C33/04 , C22C33/06 , F27D3/10

6. 发明专利

JPS6115525A Method of automatically regulating demand 失效
标题翻译：自动调节需求的方法
公开(公告)号：JPS6115525A
公开(公告)日：1986-01-23
申请号：JP13286084
申请日：1984-06-29
申请人： Nisshin Steel Co Ltd
发明人： TOKUNAGA MAMORU , KOREYASU MASAHIRO , NAKAGAWA TAKUO
IPC分类号： H02J3/00

7. 发明专利

JPS60240335A STARTING METHOD OF FURNACE COILER IN STECKEL MILL 失效
公开(公告)号：JPS60240335A
公开(公告)日：1985-11-29
申请号：JP9513684
申请日：1984-05-12
申请人： NISSHIN STEEL CO LTD
发明人： KOREYASU MASAHIRO , KOGA HIROSHI
IPC分类号： B21C47/02
摘要： PURPOSE:To improve the quality and working efficiency by determining automatically an optimum driving pattern of a coiler with respect to the initial rate of slack of a strip which fluctuates with various parameters and setting the same to a driving device. CONSTITUTION:The delivery speed VM of the strip is detected by a speed detecting means and the passage of the front end of the strip through said position is detected by a strip detecting means provided on the upper stream side thereof. The coiler is started after the time t0 which satisfies the equation I upon passage of the strip. The coiler is accelerated up to the number NF of revolution calculated by the equation II. In the equation I, L1; the distance from the position where the passage of the front end of the strip is detected to the initial position of the slit port, alpha: the learning value of the length of the front end of the strip. In the equation II, D: the coiler diameter, L0; the learning value of the initial slack length of the strip, LL the displacement of the linear distance between pinch rolls and the slit port when the coiler rotates from the initial position to the position where the strip contacts with the circumferential surface of the coiler drum.

8. 发明专利

JPH0577958B2 失效
公开(公告)号：JPH0577958B2
公开(公告)日：1993-10-27
申请号：JP13285984
申请日：1984-06-29
申请人： NISSHIN STEEL CO LTD
发明人： KOREYASU MASAHIRO , NAKAGAWA TAKUO
IPC分类号： F27D17/00 , F27B3/10 , F27D19/00

9. 发明专利

JPS62139809A METHOD AND APPARATUS FOR REFINING MOLTEN STEEL UNDER REDUCED PRESSURE 失效
公开(公告)号：JPS62139809A
公开(公告)日：1987-06-23
申请号：JP27802985
申请日：1985-12-12
申请人： NISSHIN STEEL CO LTD
发明人： KOREYASU MASAHIRO , CHIKAMA TSUGIO
IPC分类号： C21C7/10
摘要： PURPOSE:To suppress the bumping of a molten steel in the stage of refining the molten steel under a reduced pressure by controlling the pressure in a vacuum vessel and the change rate of a decarburization rate with age in such a manner that the CO and CO2 generated from the molten steel do not attain a satd. state. CONSTITUTION:A ladle 2 contg. the molten steel 3 is set in the vacuum vessel 1 and the molten steel 3 is stirred by oxygen blowing from a lance 5 and the Ar blown from a porous plug 4 by which the molten steel is refined. The pressure in an exhaust gas path 6 and the CO and CO2 in the gas are measured by a pressure gage 8 and an analyzer 9 in this stage. The signal obtd. by processing the value which is the result of the subtraction of the measured value from the preset vacuum degree pattern set in a vacuum degree pattern setter 10 with a proportional integrator 12 and the signal obtd. by subtracting the change rate pattern set in a setter 11 for the pattern of the change rate of the decarburization rate with age from the change rate of the decarburization with age determined by the gas analyzer 9 and processing the result thereof with a proportional integrating differentiator 14 are added in an adder 13. The vacuum degree of a pressure reducing means 7 is so regulated as to increase the pressure in the vacuum vessel 1. The generation of the bumping of the molten steel by the CO and CO2 and the consequent overflow from the ladle 2 are thus prevented.

10. 发明专利

JPS6115081A Method of controlling flow rate of exhaust gas in concentrated dust collection having plurality of electric furnace 失效
标题翻译：控制电除尘浓缩浓缩除尘器排气流量的方法
公开(公告)号：JPS6115081A
公开(公告)日：1986-01-23
申请号：JP13285984
申请日：1984-06-29
申请人： Nisshin Steel Co Ltd
发明人： KOREYASU MASAHIRO , NAKAGAWA TAKUO
IPC分类号： F27D17/00 , F27B3/10 , F27D19/00

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