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31. 发明专利

JPH01191713A OPERATION OF BLAST FURNACE 失效
公开(公告)号：JPH01191713A
公开(公告)日：1989-08-01
申请号：JP1575088
申请日：1988-01-28
申请人： NIPPON KOKAN KK
发明人： KATO TOMONORI , KISHIMOTO SUMIYUKI , HOTTA HIROHISA , ISHII KUNIHIKO , SUZUKI YOSHIO , ITAGAKI SHOZO , MITANI NARIYASU , CHINO ATSUSHI
IPC分类号： C21B5/00 , C21B7/24
摘要： PURPOSE:To continue the stable operation of a blast furnace and to reduce fuel ratio by obtaining middle value and half-width (width of distribution curve at 1/2 frequency) from the distribution of the heat history of granular coke collected from a raceway at the end of a tuyere and by controlling the opera tional conditions so as to attain prescribed middle value and half-width. CONSTITUTION:Granular coke is collected from a raceway at the end of a blast tuyere of a blast furnace and the distribution of the heat history of each granule is examined by laser Raman spectroscopic analysis or other method. The middle value and halt-width of the heat history are obtd. and the middle value is regulated to 1,500-2,100 deg.C by changing the operational conditions by which theoretical combustion temp. is controlled. The half-width is kept at 30-170 deg.C by increasing the amt. of pulverized coal to be blown and carrying out oxygen enrichment. Fuel ratio and the amt. of Si in molten pig iron can be reduced.

32. 发明专利

JPH01191712A OPERATION OF BLAST FURNACE 失效
公开(公告)号：JPH01191712A
公开(公告)日：1989-08-01
申请号：JP1574988
申请日：1988-01-28
申请人： NIPPON KOKAN KK
发明人： KATO TOMONORI , KISHIMOTO SUMIYUKI , HOTTA HIROHISA , ISHII KUNIHIKO , SUZUKI YOSHIO , ITAGAKI SHOZO , MITANI NARIYASU , CHINO ATSUSHI
IPC分类号： C21B5/00 , C21B7/24
摘要： PURPOSE:To increase the degree of operation of a blast furnace and to continue stable operation by controlling the temp. of the end of a tuyere, the amt. of oxygen for enrichment and the amt. of pulverized coal to be blown in accordance with information on the distribution of the heat history of granular coke collected from a raceway at the end of the tuyere. CONSTITUTION:Granular coke is collected from a raceway at the end of a blast tuyere of a blast furnace and the distribution of the heat history of each granule is examined by laser Raman spectroscopic analysis or other method. When the percentage of granules at >=2,000 deg.C in the distribution of the heat history exceeds 30%, the temp. of the end of the tuyere is reduced by blowing steam or by other method to suppress pressure drop in the lower part of the furnace and to reduce fuel ratio. When the percentage of granules at

33. 发明专利

JPS63186797A METHOD OF OPERATING COKE OVEN 失效
公开(公告)号：JPS63186797A
公开(公告)日：1988-08-02
申请号：JP1753587
申请日：1987-01-28
申请人： NIPPON KOKAN KK
发明人： SUZUKI YOSHIO , ITAGAKI SHOZO , UEDA TAKASHI , MATSUBARA KENJI
IPC分类号： C10B37/00 , C10B57/00
摘要： PURPOSE:To improve the production flexibility of a coke oven, by dividing a charge stock for coke according to properties and conducing the charging of divided charge stock portions along the direction of the length of the coke oven in a particular manner. CONSTITUTION:A charge stock for coke is divided into a plurality of portions according to at least one property selected from among water content, volatile content and density. The charging of the divided charge stock portions are conducted along the direction of the length of the coke oven in such a manner that the coking time distribution along the oven length direction becomes nearly uniform when the temp. distribution along the oven length direction is rendered uniform. According to this method, since the coking time distribution along the oven length direction is nearly uniform, the temp. distribution gradient along the oven length direction is horizontal or small. As a result, the operating temp. range can be maximized, thereby broadening production output variation. Thus, production flexibility in operations can be increased.

34. 发明专利

JPH07300589A CONTINUOUS VERTICAL COKE OVEN AND PRODUCTION OF COKE 失效
公开(公告)号：JPH07300589A
公开(公告)日：1995-11-14
申请号：JP32590994
申请日：1994-12-27
申请人： NIPPON KOKAN KK
发明人： ITAGAKI SHOZO , SUZUKI YOSHIO , SHIMOYAMA IZUMI , FUKADA KIYOSHI , UEDA TAKASHI
IPC分类号： C10B3/00 , C10B47/12
摘要： PURPOSE:To produce good-quality coke at high efficiency with a continuous vertical coke oven. CONSTITUTION:This production process is one for producing coke by using a continuous vertical coke production equipment composed of a continuous vertical coke oven 1, a drier/preheater 2 for drying and preheating coal 11 to be fed into the coke oven 1 and a hot former 5 for forming the dried and preheated coal into blocks, wherein the production is performed in such operating conditions that the drying and preheating temperature of coal 11 is 200-300 deg.C, the bulk density of the formed coal is 0.9-1.1t/m , the temperature at the center of the coking chamber in the coking zone is 750-900 deg.C, the pressure applied to the side of the coal 11 is 1-2kgf/cm , and the velocity at which the coal 11 falls within the coke oven is 0.5-1.5m/h.

35. 发明专利

JPH07268337A TRANSPORTATION OF RED-HOT COKE 失效
公开(公告)号：JPH07268337A
公开(公告)日：1995-10-17
申请号：JP5940894
申请日：1994-03-29
申请人： NIPPON KOKAN KK
发明人： ITAGAKI SHOZO , SUZUKI YOSHIO , SHIMOYAMA IZUMI , FUKADA KIYOSHI , UEDA TAKASHI
IPC分类号： C10B39/02 , C10B39/12
摘要： PURPOSE:To prevent the generation of dust and smoke in the transportation of red-hot coke. CONSTITUTION:A hood 2 of a guide vehicle 1 is closely connected to the opening of a carbonization chamber 3, an oven door 4 is removed, red-hot coke is charged into the hood 2 and transferred through a red-hot coke discharging port 2b to a coke bucket 7 and the dust generated in the hood 2 during the charging of the red-hot coke is sent to a dust collector through a dust discharging port 2c of the hood 2. After completing the transfer of the red-hot coke into the coke bucket 7, a slide gate 8 is closed to prevent the escape of powdery dust from the coke bucket 7 to the open air and the coke bucket 7 is transferred to a coke dry-quenching facility. The red-hot coke receiving port of the coke dry-quenching facility is closely connected to the red-hot coke receiving port 7a of the coke bucket 7 and the slide gate 8 of the coke bucket 7 is opened to charge the red-hot coke into the coke dry-quenching facility.

36. 发明专利

JPH07238286A METHOD FOR COOLING RED-HOT COKE 失效
公开(公告)号：JPH07238286A
公开(公告)日：1995-09-12
申请号：JP2959394
申请日：1994-02-28
申请人： NIPPON KOKAN KK
发明人： SHIMOYAMA IZUMI , SUZUKI YOSHIO , ITAGAKI SHOZO , FUKADA KIYOSHI , UEDA TAKASHI
IPC分类号： C10B39/02 , C10B39/04
摘要： PURPOSE:To provide a method for recovering steam produced in wet quenching as condensed water and further a combustible gas in a relatively simple step. CONSTITUTION:This method for cooling red-hot coke is to load the red-hot coke, carbonized and produced in a coke oven onto a quenching car, place the red-hot cake in wet quenching equipment 1, quench the red-hot coke by sprinkling water thereon, add oxygen or air to the gas, containing steam and produced at this time, lead the resultant gas to a dry quenching column 2 with a pipe, blow the gas into the upper part of a cooling chamber, react a part of the steam with the red-hot coke, provide a combustible gas, mix the combustible gas with a circulating gas, provide heat to a boiler and then recover the steam as condensed water with a cooler 4. Besides, the combustible gas produced by the reaction is recovered with a vent pipe.

37. 发明专利

JPH06157002A PHOTODECOMPOSITION APPARATUS 失效
公开(公告)号：JPH06157002A
公开(公告)日：1994-06-03
申请号：JP31675492
申请日：1992-11-26
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON KOKAN KK
发明人： MOGI MASAHARU , MATSUBARA KENJI , SUZUKI YOSHIO
IPC分类号： B01J23/78 , B01J35/02 , C01B3/04
摘要： PURPOSE:To efficiently make reactional light react with a photocatalyst in a solution without leaking the reactional light to the outside by reducing the refractive index of an inner wall of a reactional vessel from that of a reactional solution. CONSTITUTION:This photodecomposition apparatus 1 is equipped with a vessel 4 formed from a Teflon(R) pipe having about 100mm diameter and about 2m length, a window 7 of a quartz glass plate at the lower end thereof and a valve 11 for holding and taking out a reactional product 6 in the upper part of the vessel. A solution 3 prepared by dispersing a photocatalyst 2 of SrTiO3/NiO in water is introduced from an injection port 10. The refractive index of the solution 3 is about 1.33 and the refractive index of the inner wall of the vessel 4 is about 1.30. The reactional light 5' incident thereon from the window 7 propagates while totally reflecting from the wall surface of the Teflon(R) and the reflection efficiency can be raised. The produced H2 and O2 gases are taken out through the valve 11 to the outside. A taking-out port 9 is located in the upper part of the vessel and the incident window 7 of the reactional light 5 is located on the lower side. This is because if the reactional product 6 having a low refractive index is collected near the window 7, the light 5 from a light source is reflected to lower the reactional efficiency.

38. 发明专利

JPH03240907A IRON-MAKING METHOD WITH LOW CARBON DIOXIDE EXHAUST GAS 失效
公开(公告)号：JPH03240907A
公开(公告)日：1991-10-28
申请号：JP3629990
申请日：1990-02-19
申请人： NIPPON KOKAN KK
发明人： SUZUKI YOSHIO , ITAGAKI SHOZO , MITANI NARIYASU , IKARIYA TAKAO , SHIKADA TSUTOMU , KATO TOMONORI
IPC分类号： C10G2/00 , C07C1/02 , C07C29/151 , C07C31/02 , C21B5/00
摘要： PURPOSE:To reduce exhausting quantity of CO2 gas in an iron-making process by hydrogenating exhaust gas in the iron-making plant containing N2 gas, CO gas and CO2 gas with the specific ratios to generate alcohol or hydrocarbon. CONSTITUTION:The exhaust gas having >=2 of vol ratio in total of CO gas and CO2 gas contents of N2 gas content exhausted from the iron-making plant, is hydrogenated to generate the alcohol or the hydrocarbon. As the above exhaust gas, converter gas using pure oxygen, smelting reduction furnace gas using pure oxygen or high concn. oxygen, oxygen blast furnace gas, etc., are suitable and on the other hand, an ordinary blast furnace gas is unstable because of high N2 concn. The above hydroaction is executed by using catalyst of Ni series, Pt series, etc., at about 200-600 deg.C under about 1-1000atm. By this method, the exhausting quantity of CO2 gas in the iron-making process can be reduced.

39. 发明专利

JPH03240905A IRON-MAKING METHOD WITH LOW CARBON DIOXIDE EXHAUST GAS 失效
公开(公告)号：JPH03240905A
公开(公告)日：1991-10-28
申请号：JP3629790
申请日：1990-02-19
申请人： NIPPON KOKAN KK
发明人： SUZUKI YOSHIO , ITAGAKI SHOZO , MITANI NARIYASU , SAKAMOTO NOBORU , SHIOBARA KATSUAKI
IPC分类号： C01B32/50 , C21B5/00 , C21B7/00
摘要： PURPOSE:To reduce exhausting quantity of carbon dioxide gas in iron-making process by using coal obtd. with pulverization and removal of ash as raw material of coke, raw material for manufacturing sintered ore or for blowing into a blast furnace. CONSTITUTION:The coal is pulverized and if necessary, after executing separation of grain size, the ash is removed. This ash-removal is executed with the well-known gravity separation method, flotation method, etc., and desirable to be the ash removal ratio of >= about 5% ash content. This ash removal coal is used to raw material for coke, for manufacturing sintered ore or for blowing into the blast furnace at the time of iron-making in the blast furnace method, or at the time of iron-making in a smelting reduction method. By this method, energy efficiency is improved and generated quantity of carbon dioxide gas is reduced. Further, as the blast furnace, it is desirable to blow oxygen gas and non-oxidizing gas from tuyere and blow non-oxidizing preheated gas from the middle step. Then, it is desirable to substitute a part of all of the sintered ore to be charged into the blast furnace with cold bonded pellet under condition of heating and drying agglomerated iron ore raw material.

40. 发明专利

JPH03179233A SHEAR STRESS POWDERING TESTER FOR COKE 失效
公开(公告)号：JPH03179233A
公开(公告)日：1991-08-05
申请号：JP31832089
申请日：1989-12-07
申请人： NIPPON KOKAN KK
发明人： ITAGAKI SHOZO , SUZUKI YOSHIO , MITANI NARIYASU
IPC分类号： G01N3/24 , G01N3/34 , G01N33/22
摘要： PURPOSE:To enable measurement of a strength of coke under conditions the most similar to actual operation by measuring the strength using a sieve after a load is applied to coke within a housing box to vibrate to evaluate a powdering behavior when it drops. CONSTITUTION:A bottom wall 7 is closed, a specified amount of coke 1 to be tested is housed into a coke housing box 2 and a weight 3 is placed on the top thereof to apply a specified load to the coke 1. Then, a pair of vibration side walls 5 of the housing box 2 is vibrated with a driving mechanism 11 for a fixed time length at a specified frequency and amplitude. Thereafter, the bottom wall 7 is opened to discharge the coke 1 from the housing box 2. Then, the coke 1 discharged is sieved and a proportion thereof on the sieve is measured to determine a powdering, namely, strength thereof. With such an arrangement, when the coke falls within a blast furnace, a powdering behavior generated by a shear stress is evaluated. This enables measurement of the strength of the coke under conditions the most similar to actual operation.

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