专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH08269516A OPERATION METHOD OF FLUIDIZED BED FURNACE 失效
公开(公告)号：JPH08269516A
公开(公告)日：1996-10-15
申请号：JP9439295
申请日：1995-03-28
申请人： NIPPON KOKAN KK
发明人： MATSUBARA SHINJI , YAMASE OSAMU
IPC分类号： C21B13/00
摘要： PURPOSE: To provide an operation method capable of changing the supply flow rate of products without fluctuating the holdup of respective fluidized bed furnaces of bubbling type fluidized bed furnaces of a multistage type. CONSTITUTION: The set value of the granular and powder material supply 13 rate into the system in the multistage fluidized bed furnaces of a granular and powder material bubbling type is equal to the sum of a product delivery 12 rate and the loss quantity in the system and the corrected hold up. The set value of product coarse particles 10 is equal to the value obtd. after the delivered particulate 11 quantity is subtracted from the set value of the total delivered granular and powder material (total delivered product) 12 quantity. The set value of the delivered particulate 9 quantity from the n-th stage (n: >=2) of the fluidized bed furnace (hereafter 'furnace') is set equal to the generated particulate 7 quantity (or the quantity obtd. by adding a prescribed quantity thereto). The set value of the delivered particulate 8 quantity from the n-th stage furnace is equal to the value obtd. after the corrected holdup (n+1 is required not to exceed the number of columns of the fluidized bed furnaces) within the (n+1)-th stage furnace is added to the value obtd. by subtracting the quantity of the particulates generated in the next stage furnace from the sum of the delivered coarse and fine particle quantity to the next stage furnace. As the result, the furnaces are operated by calculating the values of the set values of the granular and powder material input 13 quantity to the inside of the system, etc.

2. 发明专利

JPH07166216A OPERATION OF SMELTING REDUCTION FURNACE 失效
公开(公告)号：JPH07166216A
公开(公告)日：1995-06-27
申请号：JP31466293
申请日：1993-12-15
申请人： NIPPON KOKAN KK
发明人： IWASAKI KATSUHIRO , HASEGAWA TERUYUKI , TAKAHASHI KENJI , MUROYA MASAHIRO , YAMASE OSAMU , FUKUSHIMA HIRONORI
IPC分类号： C21B11/00
摘要： PURPOSE:To enhance the fluidity of slag at the time of tapping the slag good and prevent the flow-out of char. CONSTITUTION:In this operational method, the bulk density of the slag is made to be smaller than the bulk density of the char in the slag at the time of reduction treatment to precipitate the char below the slag layer and the bulk density of the slag is made to be larger than the bulk density of the char to float up the char on the slag at the time of tapping the slag. At the time of tapping the slag in the above condition as the bulk density of the slag, the fluidity of the slag is made to be good and the slag tapping time is greatly shortened. By this method, the productivity is improved. Further, as the char is made to be in the condition of floating up on the slag at the time of tapping the slag, the flow-out of the char together with the slag is eliminated and the unit consumption of carbonaceous material is reduced.

3. 发明专利

JPH05195029A METHOD FOR PREVENTING STICKNESS OF DUST IN GENERATING GAS FROM SMELTING REDUCTION FURNACE TO GAS FLOW PASSAGE IN SMELTING REDUCTION IRON-MAKING EQUIPMENT AND DUCT FOR DISCHARGING GENERATING GAS FROM SMELTING REDUCTION FURNACE 失效
公开(公告)号：JPH05195029A
公开(公告)日：1993-08-03
申请号：JP28706892
申请日：1992-10-02
申请人： NIPPON KOKAN KK
发明人： IWASAKI KATSUHIRO , HASEGAWA TERUYUKI , YAMASE OSAMU , FUKUSHIMA HIRONORI , ISOZAKI SHINICHI , MATSUDAIRA TSUNEO , MATSUI SATOSHI , USUI TORU , OOBA NAGAYUKI , WATABE MASAYUKI , TAKAI TOSHIO , ARAKAWA SAKAE
IPC分类号： C21B11/02 , C21B11/00
摘要： PURPOSE:To prevent the stickness and the growth of dust contained in gas to an inner wall of the gas flow passage for introducing exhaust gas generated in a smelting reduction furnace in smelting reduction iron-making equipment into a pre-reduction furnace while restraining temp. drop of the exhaust gas to the min. CONSTITUTION:A small quantity of cooling gas is supplied from a gas supplying part A formed in a gas flow passage wall surface so that the supplied gas flows only along the gas flow passage wall surface, and by this cooling gas, the gas flow passage wall surface is cooled. At this time, the cooling gas is supplied from the gas supplying part A formed continuously or intermittently in the peripheral direction of the gas flow passage wall surface. Further, as the cooling gas is supplied, by arranging a concentrical tubular body in the inner side of the duct 5, annular slits are formed between the tubular body and the inner wall of the duct so as to flow a filmy cooling gas flow along the inner wall of the duct toward the exhaust gas flowing direction from the annular slits.

4. 发明专利

JPH05171235A METHOD FOR CHARGING RAW MATERIAL INTO SMELTING REDUCTION FURNACE AND CHUTE FOR CHARGING RAW MATERIAL IN SMELTING REDUCTION FURNACE 失效
公开(公告)号：JPH05171235A
公开(公告)日：1993-07-09
申请号：JP34509891
申请日：1991-12-26
申请人： NIPPON KOKAN KK
发明人： IWASAKI KATSUHIRO , HASEGAWA TERUYUKI , TAKAHASHI KENJI , MUROYA MASAHIRO , YAMASE OSAMU , FUKUSHIMA HIRONORI
IPC分类号： C21B11/02
摘要： PURPOSE:To restrain scattering of carbonaceous material at the time of charging raw material by using a gravitational dropping method. CONSTITUTION:In this raw material charging method, flow of the carbonaceous material is dropped so as to join with flow of iron ore while the flow of the carbonaceous material reaches to the molten slag 1 surface, thus to charge iron ore and carbonaceous material. In one of raw material charging chutes, a partition wall forming two flow passages is arranged and an iron ore chute and a carbonaceous chute are connected to these two flow passages, respectively. The other raw material charging chute has the constitution of double pipe shape connecting the iron ore chute at the upper part and also inserting the carbonaceous material chute near the center so as to charge the iron ore at outside of the carbonaceous material chute. Through such a raw material charging method or the raw material charging chute, since the flow B of the carbonaceous material and the flow A of the iron ore are joined, the carbonaceous material having bad wettability to the slag 11 is caught by the iron ore having high sp. gr. and dipped into the slag. Further, grains of the carbonaceous material are put in the iron ore grain flow or surrounded in this flow and charged. By this method, the scattering ratio of the carbonaceous material is reduced and the yield of the carbonaceous material is improved.

5. 发明专利

JPH02310305A STEEL TAPPING HOLE IN CONVERTER 失效
公开(公告)号：JPH02310305A
公开(公告)日：1990-12-26
申请号：JP12988389
申请日：1989-05-23
申请人： NIPPON KOKAN KK
发明人： YAMASE OSAMU
IPC分类号： C21C5/46
摘要： PURPOSE:To obtain a steel tapping hole in a converter, which can reduce remaining molten steel quantity to improve the yield of the tapped molten steel, by forming a notching part in a flowing hole in molten steel flowing passage for preventing flow- out of slag at the time of steel-tapping. CONSTITUTION:After completing blowing, the furnace body is tilted to the steel tapping hole 14 side under condition of shutting off opening part of the steel tapping hole 14 with a stopper and also a ladle 20 is ascended to the prescribed height and the tilting ia stopped at the position of about 90 deg. inclining angle of the furnace body. Then, after exhausting gas in the ladle 20, the steel tapping hole 14 is opened and the molten steel 18 is tapped into the ladle 20. At the end period of steel tapping, a slag ball 30 is fitted into the flow-out hole in the flowing passage 16. At this time, as the passage ia secured 1 between the ball 30 and the notching part 17, the remain molten steel 18 in the converter 10 is continued to flow out little by little through the passage. Then, it is detected that the tapped steel quantity is reduced, and the hole 14 is shut off after passing for the prescribed time. After stopping the steel tapping, the furnace body is returned back to the original position and the ladle 20 is descended and further, the furnace body ia tilted to the reverse side to discharge the remaining molten slag 19 in the converter 10.

6. 发明专利

JPH01201409A MEASURING INSTRUMENT IN LANCE FOR MEASURING MOLTEN METAL 失效
公开(公告)号：JPH01201409A
公开(公告)日：1989-08-14
申请号：JP2677988
申请日：1988-02-08
申请人： NIPPON KOKAN KK , OSAKA OXYGEN IND
发明人： KODAIRA SATOSHI , YAMASE OSAMU , SAKITANI MASANOBU
IPC分类号： C21C5/46
摘要： PURPOSE:To always execute high accurate measurement even in case adhesive material is stuck to lower part of a lance by specifying length of a holder of measuring instrument arranged at lower end of the lance for measuring molten metal and also making extendably/shrinkably of the holder by the prescribed length. CONSTITUTION:At the lower end part of the lance 4 for measuring the molten metal, the measuring instrument 5 composing of the holder 9 having a connector 11 at the lower part thereof and the prescribed length (l) and a cylindrical probe 10 having a measuring element 12 at the lower part thereof and a contact point 12 with the connector 11 and the prescribed length as fittable/detachable to the holder 9, is arranged. In this constitution, the length (l) of the holder 9 is made to length adding shrinking length S to the length (l') of cylindrical part inserting the probe 10 into the holder 9. When the pipe-like upper end part 11a of the connector 11 is pushed in the holder body 9a resisting against elastic force of a spring 18, the shrinking length S is eliminated and the length of the holder 9 is equalized to the length (l') of the cylindrical part of the probe 10. By this method, the contact point 12 is perfectly connected with the connector 11 to electrically connect them, regardless of existing the adhesive material 15 at the lower end face of the lance 4 or not.

7. 发明专利

JPH01195237A METHOD FOR DETECTING QUANTITY OF RESIDUAL MOLTEN SLAG IN CONVERTER 失效
公开(公告)号：JPH01195237A
公开(公告)日：1989-08-07
申请号：JP1840788
申请日：1988-01-28
申请人： NIPPON KOKAN KK
发明人： KODAIRA SATOSHI , YAMASE OSAMU
IPC分类号： C21C5/46
摘要： PURPOSE:To accurately obtain the quantity of residual molten slag in a con verter by measuring the level of residual molten slag with a microwave level meter and detecting the quantity of residual slag from both the measured level and the previously preset profiles at every furnace cooling. CONSTITUTION:After finishing refining, molten steel and molten slag are dis charged. A converter 1 is made to a vertical state and the level of molten slag 4 is measured by projecting microwaves toward the molten slag 4 remaining in the converter 1 from a microwave level meter 3 provided on the upper hood 2. The quantity of the molten slag 4 remaining in the converter 1 is detected from both the measured level and the profiles at every furnace cooling of the converter 1 previously preset and stored in a computer. Since the microwaves are not affected by disturbance such as dust, accurate measurement is performed. Thereby the proper amount of lime can be charged at a time for refining the following charge.

8. 发明专利

JPH01132706A METHOD FOR STIRRING SLAG AND MOLTEN METAL 失效
公开(公告)号：JPH01132706A
公开(公告)日：1989-05-25
申请号：JP29084587
申请日：1987-11-18
申请人： NIPPON KOKAN KK
发明人： TAKI CHIHIRO , KAWASHIMA KAZUTOSHI , FUKUMI JUNICHI , YAMASE OSAMU
IPC分类号： C21C5/34 , C21C5/28 , C21C5/30 , C21C5/35
摘要： PURPOSE:To promote reaction between molten metal and slag and to improve efficiency of refining by blowing granule of lime stone, etc., into the molten metal by carrying with gas and stirring the molten metal and the slag. CONSTITUTION:The granules of the lime stone, lime and coke for using as slag making material are stored in a granule supporting source 26. These granules are blown into the molten metal 12 in a furnace 10 by carrying with the gas. Then, the molten metal 12 and the slag 14 are stirred by flowing the above granules to promote the reaction between the molten metal 12 and the slag 14 in the furnace 10.

9. 发明专利

JPS6455317A CONVERTER BLOWING METHOD 失效
公开(公告)号：JPS6455317A
公开(公告)日：1989-03-02
申请号：JP21075387
申请日：1987-08-25
申请人： NIPPON KOKAN KK
发明人： TAKI CHIHIRO , FUKUMI JUNICHI , KOMAYA MASANORI , YAMASE OSAMU
IPC分类号： C21C5/30
摘要： PURPOSE:To adjust O2 concn. in molten steel at low cost by using oxygen quantity supplied in the molten steel, O2 quantity in waste gas of a converter and O2 quantity consumed to oxidations of Ti and Si in molten iron to control O2 concn. in the molten steel at the end point of oxygen blowing. CONSTITUTION:While stirring the molten iron 2 in the converter 1 by N2 gas blowing from plugs 4, O2 gas is blown into the molten iron 2 from a lance 3 and refined to produce the molten steel. Then, the converter waste gas generated is passed through a flue gas duct 5 and the composition and the flow rate thereof are measured by an analyzer 6 and a flow meter 7. Further, the O2 consumed to the oxidations of Si and Ti does not become O2 in the molten steel. Therefore, the actual O2 contents in the molten steel and slag are the value, which subtracts O2 quantity exhausted to out of the converter and O2 quantity consumed to the oxidations of Si and Ti from O2 quantity supplied into the converter. Then, based on this calculated value, the O2 concn. at end point is controlled. By this method, without using expensive O2 probe for sampling, the O2 concn. in the molten steel can be adjusted.

10. 发明专利

JPS62205212A SLAG REFINING METHOD IN CONVERTER BLOWING 失效
公开(公告)号：JPS62205212A
公开(公告)日：1987-09-09
申请号：JP4661986
申请日：1986-03-04
申请人： NIPPON KOKAN KK
发明人： YAMASE OSAMU
IPC分类号： C21C5/36
摘要： PURPOSE:To make thorough use of the effective components of low-phosphorus high- manganese slag obtd. at the time of subjecting a molten iron which is dephosphorized by a preliminary treatment to less slag refining by adding Mn ore thereto and to reduce the amt. of the ferromanganese, quicklime, etc., to be used by using the above- mentioned slag as slag for converter blowing of the molten iron. CONSTITUTION:Steel making refining is executed by subjecting the molten iron tapped from a blast furnace to the preliminary dephosphorization treatment to produce the low-phosphorus molten iron, charging the low-phosphorus molten iron into a converter, and executing less slag oxygen blowing and throwing manganese ore thereto during the operation to form the low-phosphorus high-manganese slag. Only the slag is made to remain in the converter after the end of refining of the molten iron to the molten steel and the molten steel is tapped. The similar less slag blowing is repeated several times in succession and thereafter, the increased low-phosphorus high Mn slag is taken out of the converter. The slag contains Fe, Ca, etc., at a high ratio in addition to the low-phosphorus high-manganese contents and since the slag is coated on the inside wall of the converter, the molten iron from the blast furnace is subjected to direct oxygen blowing without preliminary refining and the molten steel is produced without using alloy iron such as Fe-Mn and quicklime, etc.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式