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1. 发明专利

JPS62125289A ARC FURNACE FACILITY 失效
公开(公告)号：JPS62125289A
公开(公告)日：1987-06-06
申请号：JP26462285
申请日：1985-11-25
申请人： ISHIKAWAJIMA HARIMA HEAVY IND , NISSHIN STEEL CO LTD
发明人： NEHASHI KIYOSHI , CHIKAMA TSUGIO , TAKAHASHI YUJI , ISOBE TSUGIO
IPC分类号： F27B3/08 , C21C5/52 , F27B3/22

2. 发明专利

JPS60243480A ARC FURNACE FACILITY 失效
公开(公告)号：JPS60243480A
公开(公告)日：1985-12-03
申请号：JP9770484
申请日：1984-05-16
申请人： ISHIKAWAJIMA HARIMA HEAVY IND , NISSHIN STEEL CO LTD
发明人： HIRAOKA YOSHIMITSU , KITAMURO KEIZOU , HOSHI NORIO , KAMEYAMA EIHIKO , CHIKAMA TSUGIO , YAMAGAMI TETSUYA
IPC分类号： F27D13/00 , F27B3/04 , F27B3/08

3. 发明专利

JPS616582A Arc furnace facility 失效
标题翻译：弧炉设施
公开(公告)号：JPS616582A
公开(公告)日：1986-01-13
申请号：JP12628384
申请日：1984-06-19
申请人： Ishikawajima Harima Heavy Ind , Nisshin Steel Co Ltd
发明人： HIRAOKA YOSHIMITSU , KITAMURO KEIZOU , HOSHI NORIO , KAMEYAMA EIHIKO , CHIKAMA TSUGIO , YAMAGAMI TETSUYA
IPC分类号： F27D13/00 , F27B3/08

4. 发明专利

JPH02282433A RAW MATERIAL CHARGED INTO SHAFT FURNACE 失效
公开(公告)号：JPH02282433A
公开(公告)日：1990-11-20
申请号：JP10011789
申请日：1989-04-21
申请人： NISSHIN STEEL CO LTD
发明人： TANAKA KATSUHIRO , KAJIMA SHOJI , CHIKAMA TSUGIO
IPC分类号： C22B1/248
摘要： PURPOSE:To reduce the consumption of expensive lump coke in a shaft furnace and to save melting and reducing cost by adding a specified amt. of a powdery or granular carbonaceous material to steel scraps and press-briquetting them to obtain raw material charged into the shaft furnace. CONSTITUTION:When steel scraps of ordinary steel or stainless steel are press- briquetted to obtain raw material charged into a shaft furnace, a powdery or granular carbonaceous material are added to the steel scraps by an amt. satisfying an inequality 4

5. 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.

6. 发明专利

JPS6021154A CONTINUOUS CASTING DEVICE FOR THIN PLATE 失效
公开(公告)号：JPS6021154A
公开(公告)日：1985-02-02
申请号：JP12759283
申请日：1983-07-15
申请人： NISSHIN STEEL CO LTD
发明人： CHIKAMA TSUGIO , MARUHASHI SHIGEAKI , HOSHI NORIO
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the deterioration in the characteristics of the edge part and surface of a thin plate by providing gas blow-off ports to the ends of both stationary plates facing casting belts, forming gas passages in the stationary walls and attaching restricting constructions which vary the degree of restriction in the gas passages according to places. CONSTITUTION:Gas blow-off port 9 of a continuous casting device for a thin plate are provided to the end edges of the surfaces (a)-(d) of both stationary walls 5a, 5b facing casting belts and gas passages 11 communicating with the ports 9 are formed in the walls 5a, 5b. Orifices 13 for restricting the flow of gas are inserted into the passages 11 of such walls 5a, 5b to adjust the degree of restriction.

7. 发明专利

JPS6012259A CONTINUOUS CASTING DEVICE FOR THIN PLATE 失效
公开(公告)号：JPS6012259A
公开(公告)日：1985-01-22
申请号：JP12046583
申请日：1983-07-02
申请人： NISSHIN STEEL CO LTD
发明人： MARUHASHI SHIGEAKI , HOSHI NORIO , CHIKAMA TSUGIO
IPC分类号： B22D11/06
摘要： PURPOSE:To provide a titled device which prevents the deterioration in the characteristic of the edge parts and surface of a thin slab by the constitution in which an inert gas is blown from gas blow ports at the base of a side dam to prevent penetration of a molten metal into the space between the side dam and continuous rotary casting mold. CONSTITUTION:A continuous casting device for a thin plate which casts a thin slab 2 by supplying a molten metal from a tundish 4 via a side dam 3 installed above a continuous rotary casting mold of which the surface in the transverse direction of the plate is formed of a pair of casting rolls 1a, 1b rotating in the directions opposite from each other into said casting mold. An inert gas supplied from an inert gas source 11 is blown through slit-shaped gas blow ports provided to the base of the side dam 3 of such device facing the mold through gas passages 10 communicating with said parts. The penetration of the molten metal into the space delta between the base of the side dam 3 and the rolls 1a, 1b is thus prevented and the ununiformity at the edges of the slab 2 and the deterioration in the characteristic of the slab surface are prevented.

8. 发明专利

JPH02151350A APPARATUS AND METHOD FOR COOLING ROLL IN ROLL TYPE CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH02151350A
公开(公告)日：1990-06-11
申请号：JP30530588
申请日：1988-12-02
申请人： HITACHI LTD , NISSHIN STEEL CO LTD
发明人： CHIBA NOBORU , YABUKI TAKASHI , HOSHINO KAZUO , CHIKAMA TSUGIO , MATSUNAGA SHIGERU
IPC分类号： B22D11/04 , B22D11/055 , B22D11/06
摘要： PURPOSE:To improve cooling capacity and to stably cast a plate having good shape at high velocity by indirectly executing cooling of rolls through belts contacting with the outer circumferential faces of the rolls. CONSTITUTION:The belts 6a, 6b are brought into contact with the rolls 1a, 1b with guide rolls 7a, 7b, 8a, 8b. In order to give the prescribed tension to the belts 6a, 6b, the tension is developed to the belts 6a, 6b with temsioner 10a, 10b and the belts are driven while matching with rotation of the casting rolls 1a, 1b with rolls 11a, 11b for driving. In inner part contacting the belts 6a, 6b with the casting rolls 1a, 1b, the cooling devices 12a, 12b are set to execute cooling to the inner faces of the belts and conduction of heat from the surface of the temp. raised casting rolls 1a, 1b while sandwiching the belts. Therefore, the casting rolls 1a, 1b can be cooled from outer part without directly contacting with coolant.

9. 发明专利

JPH0280160A TWIN ROLL TYPE CONTINUOUS CASTING METHOD AND APPARATUS THEREOF 失效
公开(公告)号：JPH0280160A
公开(公告)日：1990-03-20
申请号：JP23158588
申请日：1988-09-16
申请人： HITACHI LTD , NISSHIN STEEL CO LTD
发明人： YABUKI TAKASHI , HOSHINO KAZUO , CHIKAMA TSUGIO , MATSUNAGA SHIGERU
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the development of defect such as penetration of molten steel, edge break and crack in a cast strip, caused by developing gap between a roll and a short side weir by suitably controlling rolling reduction force of the rolls at the time of starting continuous casting when the strip is continuously and directly cast from the molten steel with twin roll type continuous casting apparatus. CONSTITUTION:The molten steel 5 is cast into pouring basin part constituted with two rolls 1, 2 and the short side weirs 7 between the rolls from a nozzle 3, and both rolls 1, 2 are mutually and reversely rotated to continuously cast the strip 10 with the solidified shell C formed at the narrow gap. In this case, preceded the start of casting, the gap between both rolls 1, 2 is set to the prescribed value with an energization device 15 by using a motor 26 and continuous casting is started. The rolling reduction force developed with the development of the solidified shell in the molten steel 5 at the gap between both rolls is detected with a load detector 16, and by adjusting the gap between both rolls, which the detected value is apt to widen, to the suitable value with drive of the energization device 15, it is prevented that the yield of the continuous cast strip 10 is lowered dy developing the defect of the penetration of the molten steel 5 from the gap and the other edge break, crack in the cast strip 10, etc., caused by developing the gap between both rolls 1, 2 and the short side weirs 7.

10. 发明专利

JPH01240628A METHOD OF RECOVERING VALUABLE METAL FROM BY-PRODUCT OF STAINLESS STEEL PRODUCTION 失效
公开(公告)号：JPH01240628A
公开(公告)日：1989-09-26
申请号：JP6351488
申请日：1988-03-18
申请人： NISSHIN STEEL CO LTD
发明人： TANAKA KATSUHIRO , KONO MASATO , FUKUDA TOMIYA , HOSHINO KAZUO , KOBAYASHI YOSHIO , CHIKAMA TSUGIO , MATSUNAGA SHIGERU , OKADA MASAYUKI
IPC分类号： C22B7/02 , C22B7/04
摘要： PURPOSE:To execute efficient smelt reduction of by-products by classifying valuable metal-contg. materials by-produced at the time of stainless steel production to large and small materials, charging the materials through respectively different charge ports into a shaft furnace and simultaneously treating the materials. CONSTITUTION:The slag by-produced at the time of smelting of the stainless steel is classified to lumped slag and powder slag. The powder slag and the powder by-products consisting of the dust, sludge, scale, etc., by-produced at the time of the stainless steel production are housed into a hopper 34. The lumped slag mentioned above is loaded together with a carbonaceous material and steel scrap into the shaft furnace 1 from the top thereof. High-temp. oxygen- enriched air is then fed through upper and lower tuyeres 5, 4 into the furnace. The powder by-products are dried by utilizing the waste gas produced from the above-mentioned furnace 1 and is injected together with the high-temp. oxygen-enriched air mentioned above through the tuyere 5 into the furnace 1. The molten ferrometal is taken out of a tap hole 2 of the furnace bottom.

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