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1.发明公开FACILITIES FOR REDUCING METAL OXIDE, METHOD FOR OPERATING THE FACILITIES AND MOLDINGS AS LAW MATERIAL TO BE CHARGED TO REDUCTION FURNACE 有权Verfahren zum Betreiben eines Drehherd-Reduktionsofens
公开(公告)号：EP1170384A1
公开(公告)日：2002-01-09
申请号：EP00980059.0
申请日：2000-12-12
IPC分类号： C21B13/10
CPC分类号： C21B13/105 , C21B13/10 , Y02P10/212
摘要： The present invention provides a reducing furnace of the rotary hearth-type and a method for reducing a metal oxide simplified in the process from dehydration to molding, according to which a moisture-rich powdery raw material is reduced at low cost. The present invention also provides an operation method whereby dusts or sludge generated in the refining or processing of metal are economically recycled.
A powdery mixture having a moisture content of 100% or higher relative to the total mass of a metal oxide-containing powder and a carbon-containing powder is made into a slurry and mixed by stirring. Thereafter, the slurry is dehydrated to a moisture content of 16 to 26% and compression-molded into articles. The cylindrical or granular shaped articles having a thickness or diameter of 30 mm or less thus obtained are fed to a zone the atmospheric temperature of which is 1170°C or lower in the furnace and reduced through calcination by a rotary hearth reducing furnace thereby to provide a metal.摘要翻译： 本发明提供了一种转底炉的还原炉和一种简化在脱水成型过程中简化的金属氧化物的方法，根据该方法，以低成本降低了富含水分的粉末状原料。 本发明还提供了一种操作方法，其中在金属的精炼或加工中产生的灰尘或污泥经济地回收利用。 将含有金属氧化物的粉末和含碳粉末的总含量相对于水分含量为100％以上的粉末状混合物制成浆料并通过搅拌混合。 此后，将该浆料脱水至含水率为16〜26％，并压制成型。 将由此获得的厚度或直径为30mm或以下的圆柱形或颗粒状制品在炉中进料至气氛温度为1170℃或更低的区域，并通过旋转炉床还原炉煅烧而减少，从而提供 金属。
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公开(公告)号：EP1170384B1
公开(公告)日：2010-04-07
申请号：EP00980059.0
申请日：2000-12-12
IPC分类号： C21B13/10
CPC分类号： C21B13/105 , C21B13/10 , Y02P10/212
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3.发明授权METHOD FOR DRYING MOLDING CONTAINING OXIDIZED METAL, METHOD FOR REDUCING OXIDIZED METAL AND ROTARY HEARTH TYPE METAL REDUCTION FURNACE 有权用于干燥的氧化的金属法在包含成型体，一种用于减少氧化的金属与旋转炉床还原炉METAL
公开(公告)号：EP1439236B1
公开(公告)日：2012-12-05
申请号：EP02708751.9
申请日：2002-04-01
CPC分类号： F27B9/16 , C21B13/0046 , C21B13/105 , C22B1/24 , C22B1/245 , F27B9/36 , F27D19/00 , F27D21/0014 , Y02P10/136
摘要： The present invention provides: a method for drying compacts containing water so as not to cause explosion and powdering; a method for reducing the compacts after being dried with great efficiency in a rotary-hearth-type reducing furnace; and a rotary-hearth-type metal reducing furnace. In the present invention, when compacts comprising powder containing metal oxide and carbon are dried, the critical value of a water evaporation rate, beyond which explosion occurs, is determined from the size and porosity of the compacts, then the water evaporation rate is controlled to a value not exceeding the critical value and, by so doing, the increase in the internal pressure of the compacts caused by the generation of water vapor is prevented. By the method, the explosion and cracking of the compacts are prevented. Further, when compacts are dried in a rotary-hearth-type reducing furnace, explosion is prevented by controlling the heat supply rate to the compacts through the above method and successively the compacts are incinerated and reduced in the same furnace.
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4.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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