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41. 发明专利

JPH10130650A DRY QUENCHING APPARATUS FOR RED-HOT COKE AND PRODUCTION OF COKE 失效
公开(公告)号：JPH10130650A
公开(公告)日：1998-05-19
申请号：JP30558296
申请日：1996-10-31
申请人： NIPPON KOKAN KK
发明人： ISOZAKI SHINICHI , YAMAGUCHI MOCHIMASA , TATEFUKU TERUO , WATABE MASAYUKI , ITAGAKI SHOZO
IPC分类号： C10B39/02 , C10B57/02 , C10B57/14
摘要： PROBLEM TO BE SOLVED: To efficiently convert low-temp. coke oven coke into blast furnace coke by installing a dry quenching apparatus for red-hot coke which has a cooling chamber and a spare chamber and into which an inert gas is blown from below and air is blown from a specifically structured nozzle installed in the spare chamber. SOLUTION: This apparatus comprises a quenching tower 1 comprising a cooling chamber 3 and a spare chamber 2 and equipped with an inert gas feed port installed at the lower part of the cooling chamber 3, a red-hot coke charge port installed at the upper part of the spare chamber 2, a cooled coke discharge section 16 installed below the cooling chamber 3, an upper air-inlet port 4 installed at the upper part of the spare chamber 2, and a center pipe 20 having nozzles 28 and installed vertically at the center. Coke excellent in properties is obtd. by charging red-hot coke just after medium- to low-temp. carbonization in a chamber oven into the quenching tower 1, blowing preheated air through the upper blowing port 4 and the center pipe 20 to reheat coke to 900 deg.C or higher to bake it, and cooling it.

42. 发明专利

JPH0967579A METHOD FOR ESTIMATING PARTICLE DIAMETER OF COKE IN CHAMBER OVEN 失效
公开(公告)号：JPH0967579A
公开(公告)日：1997-03-11
申请号：JP24526195
申请日：1995-08-31
申请人： NIPPON KOKAN KK
发明人： FUKADA KIYOSHI , ITAGAKI SHOZO , SHIMOYAMA IZUMI
IPC分类号： C10B45/00 , C10B47/10 , C10B57/00
摘要： PROBLEM TO BE SOLVED: To provide a method for estimating the particle diameter of cake in a chamber oven which can estimate the particle diameter of coke and makes coke having a large particle diameter capable of being produced by estimating the particle diameter of coke based on the minimum value of the ratio of the tensile strength to the applied tensile stress, in coked coal blend, determined with respect to a predetermined positional range and a predetermined temp. range. SOLUTION: The section in the widthwise direction of a coke oven chamber in a chamber oven is divided into a plurality of elements having a predetermined size. For each element, the ratio of the tensile strength S of the coked coal blend for coke making in the element to the tensile stress F applied to the coked coal blend for coke making in the element is determined with respect to the position of the section in the widthwise direction of the oven and a predetermined temp. range involved in the temp. rise in the coke oven chamber. Based on the minimum value (S/F) min of the above ratio determined with respect to the predetermined positional range in the section in the widthwise direction of the oven and the predetermined temp. range, the particle diameter D of coke is estimated by the following equation (wherein D represents the tensile strength of the coked coal blend; F represents the tensile stress applied to the coked coal blend; and α and β are each a constant).

43. 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.

44. 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.

45. 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.

46. 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.

47. 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.

48. 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.

49. 发明专利

JPH01191709A OPERATION OF BLAST FURNACE 失效
公开(公告)号：JPH01191709A
公开(公告)日：1989-08-01
申请号：JP1575188
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
摘要： PURPOSE:To protect the bottom refractory of a blast furnace without lowering the operation rate by estimating the presence of a circular flow on the hearth from information on the distribution of the heat history of granular coke collected from a raceway at the end of a tuyere and by increasing the diameter of coke to be charged. 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

50. 发明专利

JPS62215694A PRODUCTION OF HIGHLY CONCENTRATED COAL WATER SLURRY 失效
公开(公告)号：JPS62215694A
公开(公告)日：1987-09-22
申请号：JP5694186
申请日：1986-03-17
申请人： NIPPON KOKAN KK
发明人： SAITO HIROSHI , ARIYAMA TATSURO , KOTO HIROYUKI , SUZUKI YOSHIO , ITAGAKI SHOZO
IPC分类号： C10L1/32
摘要： PURPOSE:To lessen ammonia liquor treatment, to eliminate security of water of solvent and to reduce the amount of pH adjustor added to improve fluidity, by using ammonia liquid as water of solvent for powdered coal. CONSTITUTION:A coke oven gas 3 sent from a coke oven 1 is cooled and cleaned to give ammonia liquor. The ammonia liquor is separated from a tar component 4 by a decanter 2 and fed to an ammonia liquor tank 5. Then, a grinding mill 11 is charged with coal 6, an additive 7 as raw materials and, if necessary, a pH adjustor 8, an ammonia liquor 10 for slurry is added from the ammonia liquor tank 5 to the mill and slurry is adjusted to proper pH to give highly concentrated coal water slurry.

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