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71. 发明专利

JPS6347308A SMELTING, REDUCING AND REFINING EQUIPMENT 失效
公开(公告)号：JPS6347308A
公开(公告)日：1988-02-29
申请号：JP19246286
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 stabilize the operation of a smelting and reducing furnace and to produce a molten iron at a low cost by adequately controlling the temp. and degree of oxidation of the exhaust gas of a reducing furnace at the time of producing the molten iron by charging iron ore, coal, lime, etc., into the smelting and reducing furnace and blowing gaseous oxygen to the furnace. CONSTITUTION:The molten iron is produced by blowing the iron ore preheated and prereduced in a prereducing furnace 3 as well as the powder of the coal and lime into the molten iron in the smelting and reducing furnace 1 and blowing O2 to the furnace from a lance to reduce the iron ore with the C of the coal. The exhaust gas 2 emitted from the reducing furnace 1 at this time is as extremely high as 1,500-1,800 deg.C; therefore, the exhaust gas from the prereducing furnace 3 is subjected to recovery of sensible heat by a dust collector 4 and a heat recovery device 5, then to sepn. of CO2 in a CO2 recovery device 6. The remaining Co- and H2-contg. gas is supplied to the down stream stage. The CO2 is partly liquefied in a liquefying device 8 and the balance is mixed with the high-temp. exhaust gas from the smelting and reducing furnace 1 by a blower 7 to control the temp. thereof to 1,150-1,250 deg.C most adequate for the prereduction of the iron ore. The degree of oxidation is also adjusted to an adequate value and such gas is supplied to the prereducing furnace 3, by which the prereducibility is controlled to a specified value and the fluctuation in the operation of the smelting and reducing 1 is prevented.

72. 发明专利

JPS6342317A SMELT-REDUCTION REFINING EQUIPMENT 失效
公开(公告)号：JPS6342317A
公开(公告)日：1988-02-23
申请号：JP18457586
申请日：1986-08-06
申请人： NIPPON KOKAN KK
发明人： FUJII SHIRO
IPC分类号： C21B13/00 , C21B13/14
摘要： PURPOSE:To enable the direct production of oxygen gas by utilizing energy in exhaust gas, by heating steam from a steam turbine by introducing the exhaust gas from a smelting reduction furnace to a heat exchanger and connecting a deoxygenating apparatus with an air compressor driven by this steam. CONSTITUTION:After using the high temp. exhaust gas from the smelting reduction furnace 1 to pre-reduction 2, the gas is supplied to the heat exchanger 4 through a dust collector 3. The heat exchanger 4 is connected with the steam turbine 5 by piping 20 and after heating the circulated steam by the heat exchanger 4, it is supplied to the steam turbine 5, to drive the steam turbine 5 and the air compressor 7. The compressor 7 supplies the compressed air to the deoxygenating apparatus 8. The deoxygenating apparatus 8 separates the oxygen gas from the compressed air, to supply the oxygen to the smelting reduction furnace 1. In this way, the power consumption for producing oxygen gas is reduced.

73. 发明专利

JPS62263909A PRODUCTION OF IRON 失效
公开(公告)号：JPS62263909A
公开(公告)日：1987-11-16
申请号：JP5040587
申请日：1987-03-06
申请人： KLOECKNER CRA TECH
发明人： RICHIYAADO EDOUIN TAANAA , KARU BUROTSUTSUMAN , JIYONASAN POORU MUUDEII
IPC分类号： C21B11/00 , C21B13/00 , C21B13/14 , C21C7/00
摘要： A method for producing iron in an elongated reaction vessel provided with underbath nozzles and top blowing means in which carbonaceous fuels, iron ore and/or prereduced ore are fed to the melt and in which the reaction gases escaping from the melt are afterburned with oxygen-containing gases in one or more stages, the waste gas aperture of the reaction vessel being offset from the reaction zone of the cabonaceous fuels and thus disposed outside the eruption and splashing area, and the waste gas temperature in the waste gas conduit connected to the waste gas aperture being held above the soldifying temperature of the droplets carried along in the waste gas stream, and the waste gas then being cooled to less than 1000 DEG C. in an adjoining chamber.

74. 发明专利

JPS62263907A TWO-STAGE MELT REDUCTION OF IRON ORE 失效
公开(公告)号：JPS62263907A
公开(公告)日：1987-11-16
申请号：JP5040387
申请日：1987-03-06
申请人： KLOECKNER CRA TECH
发明人： RICHIYAADO EDOUIN TAANAA , HANSU GEORUKU FUASUBINDAA , JIYONASAN POORU MUUDEII
IPC分类号： C21B11/00 , C21B13/00 , C21B13/14

75. 发明专利

JPS62238310A PRODUCTION OF REDUCED IRON 失效
公开(公告)号：JPS62238310A
公开(公告)日：1987-10-19
申请号：JP7983386
申请日：1986-04-07
申请人： KAWASAKI HEAVY IND LTD
发明人： SUZUKI MASANORI , MITSUTA SUSUMU
IPC分类号： C21B13/00 , C21B13/14
摘要： PURPOSE:To decrease the quantity of the heat to be supplied from the outside of the system and to reduce cost by withdrawing part of a fluid medium from the 2nd reduction furnace to reduce preliminarily reduced iron to metallic iron, separating carbonated lime therefrom and charging the same into the 1st reduction furnace. CONSTITUTION:The preliminarily reduced iron from the 1st reduction furnace as well as reducing gas and CaO are charged into the 2nd reduction furnace 2. Part of the fluid medium is withdrawn from the furnace and is magnetically separated to reduced iron and carbonated lime by a separator 5. The carbonated lime is charged together with iron ore, 2nd reduction furnace exhaust gas and oxygen into the 1st reduction furnace 1, by which the preliminary reduction of the iron ore, the regeneration of CaO of the carbonated lime and the replenishment of CaO by the supply of limestone are executed. The preliminarily reduced iron formed in such a manner is charged into the 2nd reduction furnace 2. The rate of utilization of the reducing gas is improved and the sulfur-component in the preliminarily reduced iron is decreased by the above-mentioned method.

76. 发明专利

JPS62230925A MANUFACTURE OF SMELTED AND REDUCED IRON 失效
公开(公告)号：JPS62230925A
公开(公告)日：1987-10-09
申请号：JP7532786
申请日：1986-03-31
申请人： KOBE STEEL LTD
发明人： KAMIJO TSUNAO , TAKENAKA YOSHIMICHI , SHINOHARA KATSUFUMI , ASHINAGA TAKEHIKO , MORI KENJI , NISHIDA REIJIRO
IPC分类号： C21B13/14
摘要： PURPOSE:To efficiently carry out operation when powdery or granular iron ore as starting material is prereduced and smelted and reduced to manufacture smelted and reduced iron, by blowing the prereduced powdery or granular iron ore and/or a carbonaceous material into a smelting and reducing furnace with a reducing gas produced in a producing equipment as a carrier gas. CONSTITUTION:Powdery or granular iron ore is fed to a fluidized bed reducing furnace and prereduced by heating in the presence of a reducing gas exhausted from a smelting and reducing furnace 2. Exhaust gas from the furnace 1 is fed to a modifier 3 to increase the reduction potential and part of the modified gas is blown into the furnace 1 as a recycled gas after it is allowed to join exhaust gas after combustion. The powdery or granular iron ore prereduced in the furnace 1 is blown into the smelting and reducing furnace 2 with the remainder of the modified gas as a carrier gas.

77. 发明专利

JPS62230919A PRETREATMENT OF IRON ORE BEFORE REDUCTION IN FLUIDIZED BED 失效
公开(公告)号：JPS62230919A
公开(公告)日：1987-10-09
申请号：JP7532386
申请日：1986-03-31
申请人： KOBE STEEL LTD
发明人： MORI KENJI , ONODA MAMORU , WATANABE MAKOTO , SHINOHARA KATSUFUMI , ASHINAGA TAKEHIKO , IMANISHI NOBUYUKI
IPC分类号： C21B13/00 , C10G11/00 , C21B13/14
摘要： PURPOSE:To stably and efficiently reduce powdery or granular iron ore in a fluidized bed by effectively carrying out the preheating of the iron ore and the preliminary sticking of carbon before the iron ore is introduced into a thermal decomposition stage. CONSTITUTION:Coal is introduced into a dry distillation stage 1 and dry distilled to produce a gaseous component, a liq. component and a solid component. The gaseous component and/or the liq. component is introduced into a thermal decomposition and sticking stage 2 together with powdery or granular iron ore preheated in a preheating stage 3. In the stage 2, the gaseous component and/or the liq. component is thermally decomposed by contact with the preheated powdery or granular iron ore and the resulting carbon sticks to the iron ore.l The undecomposed component and the other decomposition product are discharged into the preheating stage 3 to preheat powdery or granular iron ore introduced into the stage 3.

78. 发明专利

JPS62228419A APPARATUS FOR SUPPLYING POWDERY SUBSTANCE TO VERTICAL FURNACE 失效
公开(公告)号：JPS62228419A
公开(公告)日：1987-10-07
申请号：JP22535586
申请日：1986-09-24
申请人： KAWASAKI STEEL CO
发明人： IGAWA KATSUTOSHI , HAMADA HISAO , TAKADA SHIKO , TAKEUCHI SHINOBU , SATO KAZUHIKO , KATAYAMA EIJI
IPC分类号： C21B13/02 , C21B11/02 , C21B13/00 , C21B13/14
摘要： PURPOSE:To stabilize supplying of powdery substance and prevent wear of each pipe of apparatus, by specifying an angle formed by aperture surface of an introducing pipe for powdery material with center axis of blowing pipe, moving velocity of powdery material in the introducing pipe and a distance from aperture of the introducing pipe to tuyere top end. CONSTITUTION:Powdery granule ore supplied from a hopper 1 is charged from tuyere into vertical furnace through a supplying pipe 3, the introducing pipe 4 and a blowing pipe 5. I this time, the angle theta3 formed by aperture surface of the pipe 4 with center axis of the pipe 5, the powder moving velocity V0 in the pipe 5 and the distance L from introducing pipe aperture to tuyere to end are determined so that a inequality I is satisfied. In the inequality, DE' is shown in a formula II, Wf: upper limit powder supplying velocity (kg/sec), V0: blowing air flow quantity (Nm /sec), T: blowing air temp. ( deg.K), P: blowing air pressure (kg/m ), rho: blowing air density (kg/m ), mu: blowing air viscosity (kg/m.sec), Re: blowing air Reynolds number (-), D: tuyere diameter (m), L: aforesaid (m), theta3: aforesaid (degree), V0: aforesaid (m/sec), DE': effective eddy diffusion coefft. (m /sec).

79. 发明专利

JPS62227023A STEELMAKING APPARATUS 失效
公开(公告)号：JPS62227023A
公开(公告)日：1987-10-06
申请号：JP5788887
申请日：1987-03-11
申请人： VOEST ALPINE AG
发明人： OSUMARU SHIYUTAIPE , HARARUTO BERUGAA
IPC分类号： C21B13/14 , C21B13/02 , C21B13/12 , C21C5/52 , C21C5/56 , F27B1/02

80. 发明专利

JPS62156217A CONTROLLER FOR GAS QUANTITY FOR FLUIDIZED BED PREREDUCTION FURNACE 失效
公开(公告)号：JPS62156217A
公开(公告)日：1987-07-11
申请号：JP29346985
申请日：1985-12-28
申请人： KAWASAKI STEEL CO
发明人： HAMADA SHUNJI , IIZUKA MIKIO , TANAKA YASUO , HAMADA HISAO , KATAYAMA EIJI
IPC分类号： C21B13/00 , C21B13/14
摘要： PURPOSE:To stabilize operation while controlling furnace top gas quantity for prereduction furnace into a fixed width, by supplying furnace top gas of a melting reduction furnace to a fluidized bed prereduction furnace and introducing it to bypass arrangement to control its flow rate. CONSTITUTION:Pressure of blast air 1 is raised by a blast fan 2 and the air is heated to a prescribed temp. by a preliminary apparatus 3, then introduced into the melting reduction furnace 6 through a blast tuyere 5. Carbon material in furnace is burnt, reducing gas composed mainly of CO is generated, prereduced ore supplied from the prereduction furnace 10 through a piping 13 is finishedly reduced and melted to generate heat. The reducing gas is divided to two routes at furnace top, one is supplied into the fluidized bed prereduction furnace 10 through a piping 8, a dispersing plate 11, and the other flows together with exhaust gas of the furnace 10 through a bypass 9, a cooler 14 and a damper 15 and exhausted through a venturi scrubber 17. In this time, quantity of reducing gas to the furnace 10 is controlled by adjusting flow rate of reducing gas by the damper 15.

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