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1. 发明专利

JPH08199213A PRODUCTION OF MOLTEN IRON 失效
公开(公告)号：JPH08199213A
公开(公告)日：1996-08-06
申请号：JP1030095
申请日：1995-01-26
申请人： SUMITOMO METAL IND
发明人： UJISAWA MASARU , YAMAMOTO TAKAIKU
IPC分类号： C21B11/02
摘要： PURPOSE: To reduce the unit consumption of fuel and to improve the productivity in the producing method of molten iron by using scrap and ore as iron source. CONSTITUTION: The scrap and the ore are separately charged in laminar state on a coke packing layer 15 charged at the lower part of a cylindrical furnace 11 and the coke packing layer 15 is held at a high temp. with partial combustion by blowing assist combustible gas from primary tuyeres 13. Then, at the time of reaching the scrap packing layer 16 to the front of the secondary tuyeres, the assist combustible gas is blown from the secondary tuyeres 14, and melting of the scrap and gas reduction of the ore are promoted by interrupting this blowing at the time of reaching the ore packing layer 11 to there.

2. 发明专利

JPH05309455A 失效
公开(公告)号：JPH05309455A
公开(公告)日：1993-11-22
申请号：JP11766292
申请日：1992-05-11
申请人： SUMITOMO METAL IND
发明人： KANAZAWA TAKASHI , YAMAMOTO TAKAIKU , HIRASHIRO TADASHI
IPC分类号： B22D11/10 , B22D11/103 , B22D11/11 , B22D11/112 , B22D11/116 , B22D11/117 , C21C7/00 , C21C7/10
摘要： PURPOSE:To obtain a clean steel excellent in the removal of inclusion at the initial stage of casting by circulating a molten steel to execute degassing before starting the casting and continuously casting from a reduced pressure vessel without using an immersion nozzle, at the time of casting into a mold after executing the degassing treatment to the molten steel through a reduced pressure vessel. CONSTITUTION:At the time of continuously casting the molten steel 12 received into a tundish 14 into the mold 18 after executing the degassing through the reduced pressure vessel 16, prior to the starting of the casting and during a casting period, the circulating flowing of the molten steel 12 is executed to continuously execute the degassing treatment and the continuous casting is executed through a discharging pipe 22 from the reduced pressure vessel 16 connected with the mold 18 without using the immersion nozzle. Thus, the floating-up and the separation of inclusion in the tundish are surely executed and the cleanliness of a slab is secured and the high quality cast slab having little inclusion can stably be obtd.

3. 发明专利

JPH05125421A PRODUCTION OF MOLTEN IRON 失效
公开(公告)号：JPH05125421A
公开(公告)日：1993-05-21
申请号：JP28885091
申请日：1991-11-05
申请人： SUMITOMO METAL IND
发明人： YAMAMOTO TAKAIKU , ISHIDA HIROAKI , UJISAWA MASARU
IPC分类号： C21B11/02 , C21B11/00
摘要： PURPOSE:To produce molten iron in the stable operation from high blending ratio of iron ore and scrap by using a cylindrical furnace. CONSTITUTION:The cylindrical furnace 1 is used and a coke packing layer 7 is formed to the level containing a primary tuyere 3 from a furnace bottom, and after alternately forming plural layers of iron ore packing layers and cake packing layers to the level containing a secondary tuyere 4 thereon, assist- combustion gas is blown from the primary tuyere 3 to reduce the iron ore and at the time of completing this reduction, the assist-combustion gas is blown from the primary tuyere 3 and the secondary tuyere 4. By this method, the development of flooding and hanging is prevented, and the stability of furnace condition and the productivity are improved and the consumptions of oxygen and fuel can be reduced.

4. 发明专利

JPH059600A PRODUCTION OF PIG IRON 失效
公开(公告)号：JPH059600A
公开(公告)日：1993-01-19
申请号：JP1083791
申请日：1991-01-31
申请人： SUMITOMO METAL IND
发明人： ISHIDA HIROAKI , YAMAOKA HIDEYUKI , YAMAMOTO TAKAIKU , UJISAWA MASARU
IPC分类号： C21B3/00 , C21B11/00 , C22B1/00 , C22B7/00
摘要： PURPOSE:To produce the pig iron having a desired compsn. by using steel scrap having high contents of impurities and alloy elements and to reutilize the useful elements in the scrap. CONSTITUTION:This production process consists of the following stages (1)to (3). (1) The stage for producing the pig iron from the scrap having the high contents of the elements exclusive of iron or this scrap and iron ore in a 1st furnace and analyzing the components of this pig iron. (2) the stage for producing the pig iron from the scrap having the low contents of the elements exclusive of the iron or this scrap and the iron ore in a 2nd furnace and analyzing the components of this pig iron and (3) the stage for determining the mixing ratios of the pig irons obtd. in the stages (1) and (2) and mating these pig irons in such a manner that the compsn. thereof is confined within the compsn. range of the pig iron permitted according to the steel kinds desired to be produced.

5. 发明专利

JPH059528A DEVICE AND METHOD FOR PRODUCING MOLTEN IRON 失效
公开(公告)号：JPH059528A
公开(公告)日：1993-01-19
申请号：JP3027491
申请日：1991-02-25
申请人： SUMITOMO METAL IND
发明人： ISHIDA HIROAKI , YAMAMOTO TAKAIKU , UJISAWA MASARU , IKEMIYA HIROYUKI , MORI TOSHIHIRO
IPC分类号： C21B11/02 , C21B11/00 , F27B1/21 , F27D3/15
摘要： PURPOSE:To stably and continuously make iron by continuously tapping the produced slag in a furnace during operation without tilting the furnace at the time of producing molten iron from scrap and iron ore with a cylindrical furnace. CONSTITUTION:A slag tapping hole 7 is provided by protruding it into the furnace from furnace bottom in the cylindrical furnace 1. Then, the accumulated iron level in the furnace bottom of the molten iron 11 produced from the scrap and the iron ore 10 is detected and at the time of detecting that the accumulated iron level reaches the upper end surface level of the slag tapping hole 7, the slag tapping hole 7 is opened. At this time, since the slag 12 is separated with sp. gr. difference and is present on the upper part of the accumulated iron level, even if the furnace is not tilted, the slag can be continuously tapped. After completing the tapping of slag, an iron tapping hole 6 is opened and the molten iron is tapped. The stable continuous iron-making in the cylindrical furnace 1 can be executed, and the improvement of the productivity, the reduction in fuel and oxygen consumptions and prolonging of the service life of furnace wall can be attained. Further, as the slag in the furnace during continuous operation can be maintained at the constant little quantity, the stable operation can be executed.

6. 发明专利

JPH04243589A TREATMENT OF CAROBN-CONTAINING WASTE MATERIAL 失效
公开(公告)号：JPH04243589A
公开(公告)日：1992-08-31
申请号：JP2156491
申请日：1991-01-22
申请人： SUMITOMO METAL IND
发明人： YAMAMOTO TAKAIKU , ISHIDA HIROAKI , UJISAWA MASARU
IPC分类号： B09B3/00
摘要： PURPOSE:To subject a carbon-containing waste material such as garbage, waste plastic or paper dust to incineration treatment without generating carbon dioxide by incinerating the carbon-containing waste material at specific temp. within a closed system. CONSTITUTION:For example, the combustion chamber 1 of a vertical dry distillation furnace consisting of a flue 2, a burner 3, a recuperator 4 and a flue 5 is used to subject a carbon-containing waste material such as garbage, waste plastic or paper dust to incinaration treatment in a closed system (dry distillation). The dry distillation temp at this time 19 pref. set to 750 deg.C or higher in such a case that the waste material contains hydrogen and to 1250 deg.C or higher in such a case that the waste material contains chlorine. As a result, even a chlorine-containing waste material can be incinerated without generating harmful gas such as dioxin or chlorine or carbon dioxide. Further, the obtained exhaust gas can be utilized as a hydrogen source and residual carbide is returned to soil or can be effectively utilized as a carbon source.

7. 发明专利

JPH04228511A PRODUCTION OF MOLTEN IRON 失效
公开(公告)号：JPH04228511A
公开(公告)日：1992-08-18
申请号：JP40792690
申请日：1990-12-27
申请人： SUMITOMO METAL IND
发明人： ISHIDA HIROAKI , YAMAMOTO TAKAIKU , UJISAWA MASARU
IPC分类号： C21B11/02
摘要： PURPOSE:To efficiently produce molten iron from scraps and iron ore by using a shaft furnace. CONSTITUTION:A coke packed bed 7 is formed to the level of the primary tuyere 3-1, and a bed 8 packed with scraps and ore is formed thereon. The tip of a lance 4 is positioned in the bed 8 during the operation, a combustion supporting gas is blown in from the lance and primary tuyere, hence the bed packed with the scraps and ore is heated and melted, and molten iron is produced. Consequently, the raw material in the furnace is uniformly melted, the operation is stabilized, the fuel is saved, productivity is improved, and the erosion of the tuyere, furnace-wall refractory, etc., is reduced. Besides, the tip of the lance is dipped into the molten iron and slag formed at the furnace bottom, a desulfurizing agent is blown in, and a low-sulfur pig is produced.

8. 发明专利

JPH0420962B2 失效
公开(公告)号：JPH0420962B2
公开(公告)日：1992-04-07
申请号：JP4286486
申请日：1986-02-28
申请人： SUMITOMO METAL IND
发明人： YAMAMOTO TAKAIKU , WADA MINORU , YOSHIDA SHUJI , IKEMYA HIROYUKI
IPC分类号： C21C1/00

9. 发明专利

JPH03134109A METHOD FOR MEASURING LAYER HEIGHT OF CHARGED MATERIAL IN SMELTING FURNACE 失效
公开(公告)号：JPH03134109A
公开(公告)日：1991-06-07
申请号：JP26990989
申请日：1989-10-17
申请人： SUMITOMO METAL IND
发明人： ISHIDA HIROAKI , HANAZAKI KAZUHARU , YAMAMOTO TAKAIKU , UJISAWA MASARU
IPC分类号： C21B5/00
摘要： PURPOSE:To continuously and accurately measure layer height of charged material in a furnace and to easily adjust the layer height of charged material by arranging an acoustic range finder as shiftable in vertical, radius and circumferential directions in the smelting furnace. CONSTITUTION:The range finder 2 for accurately measuring the distance by utilizing the acoustic wave, is arranged as shiftable in the vertical, radius and circumferential directions in the smelting furnace 1. Then, the layer height of charged material in the smelting furnace at the time of executing the smelting by forming packing layer of the raw material in the furnace 1, is measured.

10. 发明专利

JPH03122207A INSTRUMENT FOR MONITORING CHARGING MATERIAL IN FURNACE 失效
公开(公告)号：JPH03122207A
公开(公告)日：1991-05-24
申请号：JP26077889
申请日：1989-10-05
申请人： SUMITOMO METAL IND
发明人： HANAZAKI KAZUHARU , YAMAMOTO TAKAIKU , ISHIDA HIROAKI
IPC分类号： C21B7/24
摘要： PURPOSE:To efficiently execute operation of a melting furnace by inserting plural pieces of image guides providing camera near tuyeres in a cylindrical melting furnace and grasping charging condition of materials from an original image obtd. through the camera. CONSTITUTION:Plural pieces of detecting parts 2 are inserted at upper and lower two steps near the tuyeres in the cylindrical melting furnace 1, and the detecting part 2 is constituted with the image guide 22 and the camera 23 providing protecting lance 21 connecting with this. The raw images in the furnace obtd. through the camera 23 are outputted to an operating processor 3 and monitor 7 in order at the prescribed timing with an image signal switching unit 6 and also if necessary, selectively controlled while switching. The operating processor 3 decides the kind of the charged material in the furnace by executing the image processing to the original image obtd. from each camera 23, and circumferential distribution and velocity at which passing the detecting part 2 for the charged material in the furnace are calculated and outputted to a furnace control device 4 and control of blowing rate of fuel gas, etc., from the tuyere and iron tapping quantity, etc., is executed. By this method, the condition in the furnace is accurately grasped and efficient operation is executed.

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