专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明专利

JPS6360802B2 失效
公开(公告)号：JPS6360802B2
公开(公告)日：1988-11-25
申请号：JP9309482
申请日：1982-06-02
IPC分类号： C21B11/02 , C21B13/00 , C21B13/14

62. 发明专利

JPS63255311A MELT GASIFYING APPARATUS 失效
公开(公告)号：JPS63255311A
公开(公告)日：1988-10-21
申请号：JP32661987
申请日：1987-12-23
申请人： VOEST ALPINE AG
发明人： RORUFU HAUKU , GERO PAPUSUTO , PEETAA RANGU
IPC分类号： C21B11/00 , C10J3/56 , C21B13/00 , C21B13/14

63. 发明专利

JPS63247308A SMELTING-REDUCTION IRON MAKING METHOD 失效
公开(公告)号：JPS63247308A
公开(公告)日：1988-10-14
申请号：JP8206587
申请日：1987-04-01
申请人： KOBE STEEL LTD
发明人： FUKUDA MITSUHIRO , TAMURA SETSUO
IPC分类号： C21B13/14
摘要： PURPOSE:To economically and efficiently execute smelting-reduction of raw material iron ore by sieving the raw material iron ore, pre-reducing the obtd. coarse grain by fluid bed, heating the fine powder at high temp., and then charging respectively from furnace top and tuyere in a vertical type smelting- reduction furnace. CONSTITUTION:The raw material iron ore A composing many kinds of grain sizes is separated into the coarse grain one and the fine powdery ore by a sieve 4. The plus sieve grain C of the coarse grain ore obtd. in there, is pre- reduced by the fluid bed formed by reducing gas G in the fluid bed pre-reduction furnace 1 and then, the reduced iron D obtd. is charged together with coke E for reducing material from the furnace top of the vertical type smelting- reduction furnace 2. On the other hand, the minus sieve powder B of the fine powdery or is made to high temp. condition by combustion heat between fine powdery coal and oxygen or plasma in blasting pipe L and blown into the furnace from the tuyere 3. By this method, all of the above raw material iron ore A is smelting-reduced without executing pretreatment, such as briquetting of the ore, and molten iron is economically obtd.

64. 发明专利

JPS63143211A IRON ORE FLUID BED REDUCTION APPARATUS 失效
公开(公告)号：JPS63143211A
公开(公告)日：1988-06-15
申请号：JP28867286
申请日：1986-12-05
申请人： NIPPON STEEL CORP
发明人： EGASHIRA TATSUHIKO , NISHIHARA NOBUYOSHI , KUNITOMO KAZUYA
IPC分类号： C21B13/00 , C21B13/14 , F27B15/02
摘要： PURPOSE:To improve void ratio of iron ore in a furnace and promote high speed fluid reaction, to contrive efficient reduction in an iron ore fluid bed reduction apparatus by arranging protruding parts at several positions in circumferential direction in the fluid bed reduction furnace attaching an outer part grain circulating device. CONSTITUTION:Raw materials, such as powdered ore, coal, etc., are charged in the fluid bed reduction furnace 6 and reduction gas 11 is injected, to fluidize the raw material grains at high speed. In this case, as the protruding parts 30 are formed in the furnace inner wall, decrease of the void ratio distribution, which shows the concn. distribution of iron ore toward furnace height direction, can be remarkably restrained at the high position in the furnace height direction as shown by the dotted line in the figure. Further, the void ratio of ore for reduction in the furnace 6 is remarkably improved and the grain concn. becomes large and reduction activity can be improved. Further, the furnace with fins forming shape of the above protruding parts 30 is easily formed and the above action is remarkably executed and there is no fear that the ore for reduction adheres to the fins.

65. 发明专利

JPS63140018A FLUIDIZED BED REDUCTION DEVICE FOR IRON ORE 失效
公开(公告)号：JPS63140018A
公开(公告)日：1988-06-11
申请号：JP28659886
申请日：1986-12-03
申请人： NIPPON STEEL CORP
发明人： EGASHIRA TATSUHIKO , NISHIHARA NOBUYOSHI , KUNITOMO KAZUYA
IPC分类号： C21B13/00 , C21B13/14 , F27B15/10
摘要： PURPOSE:To make expanded use of resources and to reduce the cost of a molten iron by using fine powder raw materials by disposing an external circulating device to a fluidized bed reduction furnace and providing means for blowing gas to the particle downcomer of the circulating device and blowing the gas to the bottom and upper part of the furnace. CONSTITUTION:A cyclone 31 is connected to the upper part of the fluidized bed reduction furnace 6 to capture the particles entrained in a reducing gas. A gas blow port 34 is provided to the suitable position of the particle downcomer connected to a hopper 32 in which the captured particles are stored and a carrier gas is blown from said port to smoothly circulate the particles to the furnace 6. A bottom blowing gas diffusion floor 36 is formed to the bottom of the furnace 6 and gas blow ports 38 are formed slightly upper than the outlet of the downcomer 33. The reducing gases are blown from the respective ports. The high-temp. iron ore is thereby fluidized and reduced, by which the reduced ore is formed.

66. 发明专利

JPS63140017A PREREDUCTION OF IRON ORE 失效
公开(公告)号：JPS63140017A
公开(公告)日：1988-06-11
申请号：JP28501786
申请日：1986-11-29
申请人： NIPPON STEEL CORP
发明人： TOKUMITSU NAOKI , ISHIKAWA HIDEKI , MATSUO MITSUTAKA , HIRATA HIROSHI
IPC分类号： C21B13/00 , C21B13/14
摘要： PURPOSE:To prevent formation of angular hard half-reduced ore and to improve the durability of pipings, tuyeres, etc., by providing a high-temp. part within a fluidized bed prereduction furnace and passing ore raw materials through the high-temp. part. CONSTITUTION:A heating mechanism 11 is provided to the lower part of the fluidized bed prereduction furnace 1 and the locally high-temp. part A is provided thereto. The high-temp. part A is maintained at the temp. higher by about 300-600 deg.C than the temp. in a free board part B which occupies the greater part in the furnace 1. The powdery raw materials of the iron ore and/or half-reduced iron ore are passed in said high-temp. part A. The powdery iron ore is thereby subjected to a high temp. treatment to form the half-reduced ore contg. soft wustite and metal iron. The generation of wear in the piping system for feeding said half-reduced ore to a smelting reduction furnace is, therefore, suppressed and the maintenance of the piping system is facilitated.

67. 发明专利

JPS6360218A SMELTING REDUCTION METHOD 失效
公开(公告)号：JPS6360218A
公开(公告)日：1988-03-16
申请号：JP20338086
申请日：1986-08-29
申请人： NIPPON KOKAN KK
发明人： FUJII SHIRO
IPC分类号： C21B13/00 , C21B13/14
摘要： PURPOSE:To attain increase in productivity and the decrease of consuming heat quantity by cooling exhaust gas of a smelting reduction furnace by radiation heat exchanger to introduce to a gas turbine and introducing the exhaust gas of the turbine into a pre-reduction furnace after heating. CONSTITUTION:The exhaust gas generated in the smelting reduction furnace 1 is cooled by the radiation heat exchanger 5 at 1,100-1,200 deg.C. The exhaust gas is supplied into the gas turbine 4 under pressurized condition to drive a generator 6. The exhaust gas from the gas turbine 4 is combined with combustion gas from a combustion device 7 to heat to about 1,000-1,200 deg.C and supply to the pre-reduction furnace 8. The gas exhausted from the pre-reduction furnace 8 passes through the exchanger 10, CO2 is removed by a de-CO2 device and then, sent to a blower 9. By effectively utilizing the generated gas in the furnace, the increase is productivity and decrease of consuming heat quantity are achieved and also the over-heating at the upper part of reaction vessel is prevented.

68. 发明专利

JPS6357708A SMELTING AND REDUCTION REFINING EQUIPMENT 失效
公开(公告)号：JPS6357708A
公开(公告)日：1988-03-12
申请号：JP20208486
申请日：1986-08-28
申请人： NIPPON KOKAN KK
发明人： FUJII SHIRO
IPC分类号： C21B13/00 , C21B13/14
摘要： PURPOSE:To provide smelting and reduction refining equipment which maintains the specified prereducibility of ore, realizes the stable smelting and reduction operation and is capable of reducing the driving power for ore pulverization by predrying the ore to be prereduced in a prereduction furnace. CONSTITUTION:The exhaust gas generated during refining in the smelting and reduction furnace 1 is introduced into the prereduction furnace 2 and is utilized for prereduction of the ore. After the exhaust gas emitted from the furnace 2 is subjected to dust removal 3, the gas is supplied to a high heat recovering part 4 and the sensible heat thereof is used for heating of steam, etc., in the heat recovering part 4. Part of the exhaust gas which is emitted from the heat recovering part 4 and cools down to about 180-200 deg.C is supplied to an ore drying device 6 and the balance is supplied to a low heat recovering part 5, where the sensible heat possessed by the exhaust gas is further recovered. The above-mentioned exhaust gas subjected to the recovery is blown into a hopper 7 and is further blown through the holes of a plate 61 into the device 6 to suspend the re charged into the device 6 from above and to dry such ore. The dried ore discharged from the device 6 is once stored in the hopper 7 and is then fed to the furnace 2 after a pulverizing stage so as to be prereduced. The prereduced ore is fed to the furnace 1 and is refined.

69. 发明专利

JPS6347317A SMELTING, REDUCING AND REFINING EQUIPMENT 失效
公开(公告)号：JPS6347317A
公开(公告)日：1988-02-29
申请号：JP19247286
申请日：1986-08-18
申请人： NIPPON KOKAN KK
发明人： FUJII SHIRO
IPC分类号： C21B13/00 , C21B13/14
摘要： PURPOSE:To collect dust from a high-temp. exhaust gas which contains dust and is discharged from a smelting and reducing furnace for producing a molten iron from iron ore with a high dust removing rate without losing the sensible heat possessed by said exhaust gas by bringing the above-mentioned exhaust gas into contact with many specific massive heat resistant materials. CONSTITUTION:An inlet 6 and an outlet 7 are provided in a flow passage for the high-temp. exhaust gas which contains a large amt. of the dust and is discharged from the smelting and reducing furnace for producing the molten iron directly from the iron ore. A dust collector body 5 which has the sectional area slightly larger than the sectional area of the inlet and the outlet and has grid members 9, 10 made of ceramics on the inlet and outlet sides is formed between said inlet and outlet. Many ceramic balls 11 are packed therein and are gradually moved in this state from above to below. The dust-contg. high-temp. exhaust gas is passed through the inside of such ceramic balls 11 to stick the dust 20 in the exhaust gas to the balls. The balls are rolled onto a sieving device 19 where the dust 20 stuck thereto is separated to the under side of the sieve 19. Since the dust collector is not wet operated, the dust is collected at the high dust removing efficiency and the exhaust gas is cleaned without decreasing the sensible heat possessed by the exhaust gas.

70. 发明专利

JPS6347313A SMELTING, REDUCING AND REFINING EQUIPMENT 失效
公开(公告)号：JPS6347313A
公开(公告)日：1988-02-29
申请号：JP19246886
申请日：1986-08-18
申请人： NIPPON KOKAN KK
发明人： FUJII SHIRO
IPC分类号： C21B13/00 , C21B13/14
摘要： PURPOSE:To collect the dust contained in a high-temp. exhaust gas which contains a large amt. of dust and is discharged from the prereducing furnace of molten iron producing equipment consisting of the prereducing furnace and smelting and reducing furnace with high thermal efficiency without losing the sensible heat of the exhaust gas by passing the above- mentioned exhaust gas through a specific heat resistant massive material. CONSTITUTION:The exhaust gas which is of a high temp. and contains a large amt. of the dust 20 from the prereducing furnace 2 is passed through a dust collector 3 from an inlet 6 and subjected to dust collection at the time of producing a molten iron from iron ore with the equipment provided with the prereducing furnace 2 and the smelting and reducing furnace 1. The central part 8 of a dust collector body 5 has the diameter larger than the diameter of an inlet 6 and outlet 7 for the exhaust gas and is partitioned by grid materials 9, 10 made of ceramics, in which many latent heat balls 11 formed by using a stainless steel and packing a CaCl2-NaCl material into the stainless steel bars are moved from above and below. The dust 20 in the exhaust gas sticks to the balls 10 and simultaneously, the balls 11 absorbs the sensible heat of the exhaust gas by a phase change. The dust 20 sticking to the balls 11 is separated by a sieving device 19 and is recovered into a hopper 22. The balls are put into storage tanks 26-28 where compressed air is fed to the balls 11 to release the absorbed heat of the balls. the absorbed heat is used to drive a gas turbine 42.

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