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公开(公告)号：EP2047000A4
公开(公告)日：2010-04-14
申请号：EP07813408
申请日：2007-07-26
CPC分类号： C21B13/0046 , C21B13/008 , C21B13/105
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公开(公告)号：EP2096181A1
公开(公告)日：2009-09-02
申请号：EP07831349.1
申请日：2007-11-07
CPC分类号： C22B1/248 , C21B5/008 , C21B13/0093 , C22B1/245 , C22B5/10 , Y10T428/12181
摘要： Hot briquette iron includes a plurality of reduced iron particles which are bonded to each other by hot forming, wherein the reduced iron particles each have a surface region having an average carbon content of 0.1 to 2.5% by mass and a central region positioned inside the surface region and having an average carbon content higher than that of the surface region.
摘要翻译： 热煤铁包括通过热成型彼此结合的多个还原铁颗粒，其中还原铁颗粒各自具有平均碳含量为0.1至2.5质量％的表面区域和位于表面内的中心区域 平均碳含量高于表面区域。
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23.发明公开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：EP1439236A4
公开(公告)日：2008-09-03
申请号：EP02708751
申请日：2002-04-01
申请人： NIPPON STEEL CORP
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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24.发明公开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：EP1426451A4
公开(公告)日：2008-07-16
申请号：EP02765426
申请日：2002-09-05
申请人： NIPPON STEEL CORP
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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公开(公告)号：EP1867736A1
公开(公告)日：2007-12-19
申请号：EP07014615.4
申请日：2003-09-19
发明人： Sugitatsu, Hiroshi, c/o Kabushiki Kaisha Kobe Seiko Sho , Tanaka, Hidetoshi, c/o Kabushiki Kaisha Kobe Seiko Sho , Harada, Takao, c/o Kabushiki Kaisha Kobe Seiko Sho , Miyahara, Itsuo, c/o Kabushiki Kaisha Kobe Seiko Sho , Kobayashi, Isao, c/o Kabushiki Kaisha Kobe Seiko Sho
CPC分类号： C21B13/143 , C21B13/0046 , C21B13/006 , C21B13/105 , C21C5/5264 , Y02P10/216
摘要： The present invention provides a process for producing ferronickel, comprising a mixing step of mixing a feedstock containing nickel oxide and iron oxide with a carbonaceous reductant to prepare a mixture; a reducing step of heating and reducing the mixture in a moving hearth furnace to prepare a reduced mixture; and a smelting step of smelting the reduced mixture in a smelting furnace to prepare ferronickel; further comprising a reduced mixture-retaining step of cooling the reduced mixture to a temperature ranging from 450°C to 1100° in the moving hearth furnace to maintain the reduced mixture at that temperature for 17 seconds or more or discharging the reduced mixture from the moving hearth furnace to place the reduced mixture in another vessel to cool the reduced mixture to a temperature ranging from 450°C to 1100°C in the vessel to maintain the reduced mixture at that temperature for 17 seconds or more.
摘要翻译： 本发明提供一种生产镍铁的方法，包括将含有氧化镍和氧化铁的原料与碳质还原剂混合以制备混合物的混合步骤; 在移动的炉床炉中加热和还原混合物以制备还原混合物的还原步骤; 以及在冶炼炉中熔炼还原的混合物以制备镍铁的冶炼步骤; 还包括减少的混合物保留步骤，在移动的炉床炉中将还原的混合物冷却至450℃至1100℃的温度，以将还原的混合物在该温度下保持17秒或更长时间，或将还原的混合物从移动的 炉底炉将还原的混合物置于另一个容器中以将还原的混合物冷却至容器中的450℃至1100℃的温度，以将还原的混合物在该温度下保持17秒或更长时间。
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公开(公告)号：EP1445336B1
公开(公告)日：2007-12-12
申请号：EP02770270.3
申请日：2002-10-25
IPC分类号： C21B13/10
CPC分类号： C21B13/10 , C21B13/0066 , C21B13/0073 , C21B13/0086 , C21B13/105 , C21B2100/44 , Y02P10/216
摘要： A method for producing metallic iron which involves heating a raw material mixture containing a carbonaceous reducing agent and a substance containing iron oxide, to reduce the iron oxide and melt the product, wherein the raw material mixture is fed onto a hearth of a thermal reducing furnace after a carbonaceous material for adjusting an atmosphere in a powdery granule form is spread over the hearth, characterized in that as the carbonaceous material for adjusting an atmosphere, use is made of a carbonaceous material which does not exhibit blocking and solidifying property during operation. The method allows the prevention of the solidification of the carbonaceous material in a powdery granule form into a rice cracker form, which leads to efficient execution of a solid state reduction process with stable operation.
摘要翻译： 1。一种金属铁的制造方法，其特征在于，将含有碳质还原剂和含有氧化铁的物质的原料混合物加热，还原氧化铁并使其熔融，从而将原料混合物供给至热还原炉的炉床 在用于调节粉末颗粒形式的气氛的碳质材料铺展在炉床上之后，其特征在于，作为用于调节气氛的碳质材料，使用在操作过程中不显示粘连和固化特性的碳质材料。 该方法可以防止粉状颗粒形式的碳质材料凝固成米饼形式，这导致有效执行固态还原过程，并且操作稳定。
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公开(公告)号：EP1634968A4
公开(公告)日：2007-12-05
申请号：EP04719633
申请日：2004-03-11
申请人： KOBE STEEL LTD
发明人： TOKUDA KOJI , KIKUCHI SHOICHI , TSUGE OSAMU
CPC分类号： C21B13/105 , C21B13/0006 , C21B13/0073 , C22B1/245 , C22B5/10 , F27B9/16 , F27D7/06
摘要： A method for producing reduced iron wherein a raw material feed step of charging a raw material containing a carbonaceous reducing agent and an iron oxides containing material into a rotating hearth furnace, a heating and reduction step of heating said raw material and reducing iron oxides in said raw material, to form reduced iron, a melting step of melting said reduced iron, a cooling step of said molten reduced iron, and a discharging step of discharging said cooled reduced iron to the outside of the furnace are successively carried out in the direction of the movement of the hearth, which comprises providing, in the above furnace, a flow rate adjusting partition wall for controlling the flow of a gas in the furnace, to thereby form the flow of the gas in the furnace in the cooling step along the direction of the movement of the hearth. The above method allows the suitable control of the flow of the outside air (an oxidizing gas) entering from a raw material feeding means, a discharging means or the like, which leads to the solution of a problem that the reduction rate is decreased by said outside air.
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公开(公告)号：EP1320633B1
公开(公告)日：2007-11-14
申请号：EP01951240.9
申请日：2001-07-19
发明人： DRY, Rodney, James
CPC分类号： C21B13/0026 , C21B13/0013 , Y02P10/136
摘要： A direct smelting process for producing iron and/or ferroalloys on a commercial scale in a metallurgical vessel is disclosed. The process includes injecting solid feed materials into a molten bath via multiple solids injection lances (27) and injecting post-combustion oxygen-containing gas into the vessel via one or more lance (26). The process is characterised by selecting the numbers of solids injection and oxygen gas injection lances and the relative positions of these lances and controlling process operating conditions so that: (i) an expanded molten bath zone (28) that has a raised region (70) forms around the oxygen gas injection region of the vessel between the region and the side walls of the vessel; (ii) splashes, droplets and streams of molten material project upwardly from the raised region and form a curtain (72) around the oxygen gas injection region between the region and the vessel side walls and wet the side walls; and (iii) a "free" space (29) forms around a lower end of the or each oxygen gas injection lance, the free space having a concentration of molten material that is lower than the molten material concentration in the expanded molten bath zone.
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公开(公告)号：EP1844168A1
公开(公告)日：2007-10-17
申请号：EP05824314.8
申请日：2005-12-07
发明人： IWASAKI, Iwao , LALICH, Michael C. , BEAUDIN, Robert C. , KIESEL, Richard F. , LINDGREN, Andrew L. , BLEIFUSS, Rodney L
CPC分类号： F27B9/028 , C21B13/0046 , C21B13/006 , C21B13/008 , C21B13/10 , C21B13/105 , C22B1/245 , C22B5/10 , F27B9/045 , F27B9/12 , F27B9/20 , F27B9/40
摘要： Method and system for producing metallic nuggets includes providing reducible mixture (e.g., reducible micro-agglomerates; reducing material and reducible iron bearing material; reducible mixture including additives such as a fluxing agent; compacts, etc.) on at least a portion of a hearth material layer. In one embodiment, a plurality of channel openings extend at least partially through a layer of the reducible mixture to define a plurality of nugget forming reducible material regions. Such channel openings may be at least partially filled with nugget separation fill material (e.g., carbonaceous material). Thermally treating the layer of reducible mixture results in formation of one or more metallic iron nuggets. In other embodiments, various compositions of the reducible mixture and the formation of the reducible mixture provide one or more beneficial characteristics.
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公开(公告)号：EP1437420A4
公开(公告)日：2007-08-22
申请号：EP03799416
申请日：2003-08-29
申请人： KOBE STEEL LTD
发明人： TANAKA HIDETOSHI , MIYAHARA ITSUO , UEMURA HIROSHI , HARADA TAKAO , KOBAYASHI ISAO , SUGITATSU HIROSHI
IPC分类号： C01G23/04 , C21B5/02 , C21B11/08 , C21B13/00 , C21B13/10 , C21B13/14 , C21B15/02 , C21C5/54 , C22B7/04 , C22B34/12 , F27B9/02
CPC分类号： C21B13/0006 , C21B13/006 , C21B13/008 , C21B13/105 , C21B13/14 , C21B13/143 , C21C5/54 , C22B34/1218 , C22B34/1281 , Y02P10/136 , Y02P10/216 , Y02P10/23
摘要： A method for producing a titanium containing slag, which comprises heating a raw material mixture containing a titanium oxide, an iron oxide and a carbonaceous reducing agent or another raw material mixture further containing a calcium oxide source in addition to the above in a reducing furnace to reduce the iron oxide in the mixture to a reduced iron, supplying the product to a heating type melting furnace, heating the product in the melting furnace to melt said reduced iron and separate it from a slag containing a titanium oxide, and discharge the resultant titanium oxide containing slag to the outside of the furnace for recovery. The method can be used for producing a titanium oxide containing slag from a material containing a titanium oxide and an iron oxide with good efficiency, while suppressing the reduction of titanium dioxide and minimizing electric power consumption.
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