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1.发明授权METHOD FOR OPERATING ROTARY HEARTH TYPE REDUCING FURNACE AND ROTARY HEARTH TYPE REDUCING FURNACE FACILITIES 有权运行方法用于车削COOKER还原炉转底炉还原和DEVICES
公开(公告)号：EP1340822B1
公开(公告)日：2008-01-16
申请号：EP01982753.4
申请日：2001-11-09
CPC分类号： C21B13/105 , C21B13/0073 , C21B13/10 , C21B2100/44 , C21B2100/66 , C22B5/10 , F27B9/16 , F27D17/004 , Y02P10/136 , Y02P10/216
摘要： A method of operating a rotary hearth type reducing furnace, characterized in that a combustion gas generated in the furnace is held in a state, wherein the temperature of the gas is 800 DEG C or higher, the concentration of carbon monoxide is 2000 ppm by volume or less and turbulent flow is satisfactorily developed, for a period of a predetermined time or more, in at least one of the inside of an exhaust gas exit duct and the vicinity of the exhaust gas exit duct, and then is cooled rapidly; and rotary hearth type reducing furnace facilities required for the practice of the method of operation. The operating method allows the suppression of generation of dioxins in a combustion exhaust gas and also the efficient recovery of heat from the combustion exhaust gas having an elevated temperature, in a process of firing and reducing pellets or the like formed from a ore powder such as a chromium ore or iron ore powder, or a dust, a sludge or the like containing an oxidized metal such as iron oxide generated in the metal industry in a rotary hearth type reducing furnace, and also allows the total mole number of zinc and lead, the total mole number of alkali metals, and the total mole number of halogen elements contained in a dust in the combustion exhaust gas to be controlled so that the three numbers satisfy a specific relationship.
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2.发明公开PROCESS FOR PRODUCING REDUCED IRON PELLETS, AND PROCESS FOR PRODUCING PIG IRON 有权生产减少的铁丸的方法，以及生产铁铁的方法
公开(公告)号：EP2189547A1
公开(公告)日：2010-05-26
申请号：EP08830144.5
申请日：2008-09-11
发明人： IBARAKI, Tetsuharu , ODA, Hiroshi
CPC分类号： C22B5/10 , C21B13/0046 , C21B13/008 , C21B13/105 , C22B1/245 , Y02P10/216
摘要： In a method for producing a reduced iron pellet, when a powder formed article including iron oxide and carbon is heated and reduced in a rotary hearth furnace, a formed article produced using a raw material, in which an average diameter of the iron oxide is 50 microns or less and a ratio of carbon monoxide to carbon dioxide in a reduction zone is from 0.3 to 1, is reduced at a temperature of 1400°C or less, thereby producing a reduced iron pellet in which a metallization ratio of iron is 50 to 85% and a ratio of residual carbon is 2% or less.
摘要翻译： 在还原铁丸的制造方法中，将含有氧化铁和碳的粉末成形体在旋转炉床式炉内加热还原时，使用氧化铁的平均粒径为50μm的原料制造的成形体 微米或更小，并且还原区中一氧化碳与二氧化碳的比率为0.3至1，在1400℃或更低的温度下还原，从而产生还原铁颗粒，其中铁的金属化率为50至100。 85％，残碳率为2％以下。
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3.发明授权METHOD FOR PRODUCING REDUCED IRON COMPACT IN ROTARY HEARTH REDUCING FURNACE, REDUCED IRON COMPACT, AND METHOD FOR PRODUCING PIG IRON USING THE SAME 有权过程还原铁制造含有转底炉还原炉PRESS NERD，还原含铁PRESS岭和方法生铁的制造用这种方法
公开(公告)号：EP1426451B1
公开(公告)日：2012-05-09
申请号：EP02765426.8
申请日：2002-09-05
发明人： IBARAKI, Tetsuharu , IMURA, Shouji , ODA, Hiroshi , TAKAHASHI, Masaharu , ABE, Yoichi , TAKAHASHI, Shigeki , SUZUKI, Satoshi
CPC分类号： C21B13/105 , C21B13/0046 , C21B13/023
摘要： A method for producing a reduced iron compact having a high crushing strength, hardly powdering, and having a high reducibility by using a baking reducing furnace of solid reducing type such as a rotary hearth reducing furnace, a reduced iron compact produced by the method, and a method for smelting-reducing the reduced iron compact in a blast furnace. In the method for producing the reduced iron compact, the compact is so produced that the atomic molar ratios of the carbon in a raw powder of a mixture of an iron oxide-containing powder and a carbon-containing powder and the oxygen chemically bonded to iron, manganese, nickel, zinc, and lead or the content of the ferric oxide in the raw powder is in a specific range and that the porosity is in a specific range, and the compact is placed on the hearth of a reducing furnace which the hearth rotates the compact, heated by the heat of the burning gas in the upper part of the furnace, and baked and reduced above a predetermined temperature.
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4.发明公开METHOD FOR REDUCTION TREATMENT OF METAL OXIDE OR IRONMAKING WASTE, AND METHOD FOR CONCENTRATION AND/OR RECOVERY OF ZINC AND/OR LEAD 有权一种用于还原处理金属氧化物或铁的生产废料和方法的用于浓缩和/或回收锌和/或铅的过程。
公开(公告)号：EP1561829A1
公开(公告)日：2005-08-10
申请号：EP03795407.0
申请日：2003-09-11
发明人： ICHIKAWA, Hiroshi, Nippon Steel Corporation , IBARAKI, Tetsuharu , IMURA, Shoji , ODA, Hiroshi , ABE, Yoichi, Nippon Steel Corporation , TAKAHASHI, Shigeki, Nippon Steel Corporation , KANEMORI, Nobuyuki, Nippon Steel Corporation , SUZUKI, Satoshi, Nippon Steel Corporation
CPC分类号： C21B13/105 , C21B13/006 , C22B1/245 , C22B5/02 , C22B5/10 , C22B7/02 , C22B13/025 , C22B19/30 , C22B19/34 , Y02P10/136 , Y02P10/214 , Y02P10/216 , Y10S75/961
摘要： A method of reduction treatment of metal oxides characterized by using as a material a powder containing metal oxides and containing alkali metals and halogen elements and further, in accordance with need, carbon, mixing said material with water to produce a slurry, then dehydrating this and charging the dehydrated material, mixed with another material in accordance with need, into a rotary hearth type reduction furnace for reduction.
摘要翻译： 还原处理，通过使用作为材料的粉末含有金属氧化物和包含碱金属和卤族元素，并进一步，在与需要，碳雅舞蹈，混合所述材料与水以产生浆料，然后脱水这个和为特征的金属氧化物的方法 脱水材料，具有与需要雅舞蹈另一种材料混合，填充到回转炉底式还原炉还原。
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5.发明公开METHOD FOR OPERATING ROTARY HEARTH TYPE REDUCING FURNACE AND ROTARY HEARTH TYPE REDUCING FURNACE FACILITIES 有权运行方法用于车削COOKER还原炉转底炉还原和DEVICES
公开(公告)号：EP1340822A1
公开(公告)日：2003-09-03
申请号：EP01982753.4
申请日：2001-11-09
CPC分类号： C21B13/105 , C21B13/0073 , C21B13/10 , C21B2100/44 , C21B2100/66 , C22B5/10 , F27B9/16 , F27D17/004 , Y02P10/136 , Y02P10/216
摘要： The present invention provides a method of operation and a facility for the same suppressing the generation of dioxins in the combustion exhaust gas and efficiently reclaiming heat from high temperature combustion exhaust gas when firing and reducing fines of chromium ore, iron ore, or other ore or pellets formed from dust, sludge, etc. containing iron oxide or other metal oxides generated in the metal industry in a reducing rotary hearth furnace. This treats the combustion gas generated in the reducing rotary hearth furnace to make the temperature of the gas 800°C or higher for at least a certain time, to make the concentration of the carbon monoxide not more than 200 ppm in terms of volume ratio, and to achieve a sufficiently well developed turbulent state at least at one of the inside of the exhaust gas outlet duct and the vicinity of the exhaust gas outlet duct for at least a certain time, then rapidly cooling the gas. Further, it controls the total number of moles of zinc and lead, the total number of moles of alkali metals, and the total number of moles of halogen elements contained in the combustion exhaust gas to a predetermined ratio.
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