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公开(公告)号：US20060096420A1
公开(公告)日：2006-05-11
申请号：US10541457
申请日：2003-12-26
IPC分类号： C21B15/00
CPC分类号： C22B5/10 , C21B13/10 , C22B1/244 , C22B34/32 , Y02P10/136
摘要： An object of the present invention is to provide a method for reducing a chromium-containing material at a high chromium reduction degree. In the method of the present invention, a mixture of a feedstock containing chromium oxide and a carbonaceous reductant is heated and reduced by radiation heating in a moving hearth furnace. The average rate of raising the temperature of the mixture in the reduction is preferably 13.6° C./s or higher in the period from the initiation of the radiation heating of the mixture until the mixture reaches 1,114° C.
摘要翻译： 本发明的目的是提供一种在高铬还原度下还原含铬材料的方法。 在本发明的方法中，通过在移动的炉床炉中的辐射加热来加热和还原含有氧化铬和碳质还原剂的原料的混合物。 在混合物的辐射加热开始到混合物达到1114℃之间的时间内，还原中混合物的温度升高的平均速率优选为13.6℃/秒或更高。
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公开(公告)号：US08262766B2
公开(公告)日：2012-09-11
申请号：US12543798
申请日：2009-08-19
IPC分类号： C21B11/00
CPC分类号： C22B5/10 , C21B13/10 , C22B1/244 , C22B34/32 , Y02P10/136
摘要： An object of the present invention is to provide a method for reducing a chromium-containing material at a high chromium reduction degree. In the method of the present invention, a mixture of a feedstock containing chromium oxide and a carbonaceous reductant is heated and reduced by radiation heating in a moving hearth furnace. The average rate of raising the temperature of the mixture in the reduction is preferably 13.96° C./s or higher in the period from the initiation of the radiation heating of the mixture until the mixture reaches 1,114° C.
摘要翻译： 本发明的目的是提供一种在高铬还原度下还原含铬材料的方法。 在本发明的方法中，通过在移动的炉床炉中的辐射加热来加热和还原含有氧化铬和碳质还原剂的原料的混合物。 在从混合物的辐射加热开始到混合物达到1114℃之间的时间内，还原中混合物的温度升高的平均速率优选为13.96℃/秒或更高。
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公开(公告)号：US08088195B2
公开(公告)日：2012-01-03
申请号：US11936549
申请日：2007-11-07
申请人： Hidetoshi Tanaka , Itsuo Miyahara , Hiroshi Uemura , Takao Harada , Hiroshi Sugitatsu , Isao Kobayashi
发明人： Hidetoshi Tanaka , Itsuo Miyahara , Hiroshi Uemura , Takao Harada , Hiroshi Sugitatsu , Isao Kobayashi
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： The present invention provides a method for efficiently manufacturing a titanium oxide-containing slag from a material including titanium oxide and iron oxide, wherein a reduction of titanium dioxide is suppressed and the electric power consumption is minimized. The method includes the steps of: heating a raw material mixture including titanium oxide, iron oxide, and a carbonaceous reductant, or the raw material mixture further including a calcium oxide source, in a reducing furnace; reducing the iron oxide in the mixture to form reduced iron; feeding the resultant mixture to a heating melting furnace; heating the resultant mixture in the heating melting furnace to melt the reduced iron and separate the reduced iron from a titanium oxide-containing slag; and discharging and recovering the titanium oxide-containing slag out of the furnace.
摘要翻译： 本发明提供了一种从包含氧化钛和氧化铁的材料有效地制造含氧化钛的炉渣的方法，其中抑制了二氧化钛的还原并使电力消耗最小化。 该方法包括以下步骤：在还原炉中加热包括氧化钛，氧化铁和碳质还原剂的原料混合物，或进一步包含氧化钙源的原料混合物; 减少混合物中的氧化铁以形成还原铁; 将所得混合物送入加热熔化炉; 在加热熔融炉中加热所得混合物以熔化还原铁并将还原铁与含氧化钛的炉渣分离; 并将含氧化钛的炉渣从炉中排出和回收。
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公开(公告)号：US20100037728A1
公开(公告)日：2010-02-18
申请号：US12543798
申请日：2009-08-19
CPC分类号： C22B5/10 , C21B13/10 , C22B1/244 , C22B34/32 , Y02P10/136
摘要： An object of the present invention is to provide a method for reducing a chromium-containing material at a high chromium reduction degree. In the method of the present invention, a mixture of a feedstock containing chromium oxide and a carbonaceous reductant is heated and reduced by radiation heating in a moving hearth furnace. The average rate of raising the temperature of the mixture in the reduction is preferably 13.96° C./s or higher in the period from the initiation of the radiation heating of the mixture until the mixture reaches 1,114° C.
摘要翻译： 本发明的目的是提供一种在高铬还原度下还原含铬材料的方法。 在本发明的方法中，通过在移动的炉床炉中的辐射加热来加热和还原含有氧化铬和碳质还原剂的原料的混合物。 在从混合物的辐射加热开始到混合物达到1114℃之间的时间内，还原中混合物的温度升高的平均速率优选为13.96℃/秒或更高。
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公开(公告)号：US20080069763A1
公开(公告)日：2008-03-20
申请号：US11936549
申请日：2007-11-07
申请人： Hidetoshi Tanaka , Itsuo Miyahara , Hiroshi Uemura , Takao Harada , Hiroshi Sugitatsu , Isao Kobayashi
发明人： Hidetoshi Tanaka , Itsuo Miyahara , Hiroshi Uemura , Takao Harada , Hiroshi Sugitatsu , Isao Kobayashi
IPC分类号： C01G23/08
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： The present invention provides a method for efficiently manufacturing a titanium oxide-containing slag from a material including titanium oxide and iron oxide, wherein a reduction of titanium dioxide is suppressed and the electric power consumption is minimized. The method includes the steps of: heating a raw material mixture including titanium oxide, iron oxide, and a carbonaceous reductant, or the raw material mixture further including a calcium oxide source, in a reducing furnace; reducing the iron oxide in the mixture to form reduced iron; feeding the resultant mixture to a heating melting furnace; heating the resultant mixture in the heating melting furnace to melt the reduced iron and separate the reduced iron from a titanium oxide-containing slag; and discharging and recovering the titanium oxide-containing slag out of the furnace.
摘要翻译： 本发明提供了一种从包含氧化钛和氧化铁的材料有效地制造含氧化钛的炉渣的方法，其中抑制了二氧化钛的还原并使电力消耗最小化。 该方法包括以下步骤：在还原炉中加热包括氧化钛，氧化铁和碳质还原剂的原料混合物，或进一步包含氧化钙源的原料混合物; 减少混合物中的氧化铁以形成还原铁; 将所得混合物送入加热熔化炉; 在加热熔融炉中加热所得混合物以熔化还原铁并将还原铁与含氧化钛的炉渣分离; 并将含氧化钛的炉渣从炉中排出和回收。
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6.发明申请公开(公告)号：US20070113708A1
公开(公告)日：2007-05-24
申请号：US11627165
申请日：2007-01-25
IPC分类号： C21B13/10
CPC分类号： C21B13/143 , C21B13/0046 , C21B13/006 , C21B13/105 , C21C5/5264 , Y02P10/216
摘要： The present invention provides a process that is useful in producing ferronickel having a high Ni content at low cost with high efficiency and reproducibility even if a low-grade feedstock containing nickel oxide is used. In particular, a feedstock containing nickel oxide and iron oxide is mixed with a carbonaceous reductant, the mixture is formed into agglomerates with an agglomerator, and the agglomerates are heated and reduced in a moving hearth furnace, whereby reduced agglomerates in which the Ni metallization degree is 40% or more and the Fe metallization degree is at least 15% less than the Ni metallization degree are prepared by adjusting the retention time of the agglomerates placed in the moving hearth furnace. The reduced agglomerates, in which the Ni component has been primarily reduced as compared with the Fe component, are smelted in a smelting furnace, whereby ferronickel having a high Ni content is obtained.
摘要翻译： 本发明提供了即使使用含有氧化镍的低品位原料，也可以以低成本，高效率，再现性高的Ni含量制造镍铁的方法。 特别地，将含有氧化镍和氧化铁的原料与碳质还原剂混合，将该混合物与附聚物形成凝聚体，并在移动的炉床炉中加热和还原附聚物，由此减少附着物，其中Ni金属化度 为40％以上，通过调整放置在移动的炉底炉中的凝聚体的保留时间来制备Fe金属化度比Ni金属化度小至少15％。 与Fe成分相比，Ni成分主要还原的还原附聚物在冶炼炉中熔炼，得到Ni含量高的镍铁。
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7.发明申请公开(公告)号：US20050211020A1
公开(公告)日：2005-09-29
申请号：US10508546
申请日：2003-09-19
CPC分类号： C21B13/143 , C21B13/0046 , C21B13/006 , C21B13/105 , C21C5/5264 , Y02P10/216
摘要： The present invention provides a process that is useful in producing ferronickel having a high Ni content at low cost with high efficiency and reproducibility even if a low-grade feedstock containing nickel oxide is used. In particular, a feedstock containing nickel oxide and iron oxide is mixed with a carbonaceous reductant, the mixture is formed into agglomerates with an agglomerator, and the agglomerates are heated and reduced in a moving hearth furnace, whereby reduced agglomerates in which the Ni metallization degree is 40% or more and the Fe metallization degree is at least 15% less than the Ni metallization degree are prepared by adjusting the retention time of the agglomerates placed in the moving hearth furnace. The reduced agglomerates, in which the Ni component has been primarily reduced as compared with the Fe component, are smelted in a smelting furnace, whereby ferronickel having a high Ni content is obtained.
摘要翻译： 本发明提供了即使使用含有氧化镍的低品位原料，也可以以低成本，高效率，再现性高的Ni含量制造镍铁的方法。 特别地，将含有氧化镍和氧化铁的原料与碳质还原剂混合，将该混合物与附聚物形成凝聚体，并在移动的炉床炉中加热和还原附聚物，由此减少附着物，其中Ni金属化度 为40％以上，通过调整放置在移动的炉底炉中的凝聚体的保留时间来制备Fe金属化度比Ni金属化度小至少15％。 与Fe成分相比，Ni成分主要还原的还原附聚物在冶炼炉中熔炼，得到Ni含量高的镍铁。
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公开(公告)号：US20050028643A1
公开(公告)日：2005-02-10
申请号：US10495577
申请日：2003-08-29
申请人： Hidetoshi Tanaka , Itsuo Miyahara , Hiroshi Uemura , Takao Harada , Hiroshi Sugitatsu , Isao Kobayashi
发明人： Hidetoshi Tanaka , Itsuo Miyahara , Hiroshi Uemura , Takao Harada , Hiroshi Sugitatsu , Isao Kobayashi
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 , C21B3/04
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： The present invention provides a method for efficiently manufacturing a titanium oxide-containing slag from a material including titanium oxide and iron oxide, wherein a reduction of titanium dioxide is suppressed and the electric power consumption is minimized. The method includes the steps of: heating a raw material mixture including titanium oxide, iron oxide, and a carbonaceous reductant, or the raw material mixture further including a calcium oxide source, in a reducing furnace; reducing the iron oxide in the mixture to form reduced iron; feeding the resultant mixture to a heating melting furnace; heating the resultant mixture in the heating melting furnace to melt the reduced iron and separate the reduced iron from a titanium oxide-containing slag; and discharging and recovering the titanium oxide-containing slag out of the furnace.
摘要翻译： 本发明提供了一种从包含氧化钛和氧化铁的材料有效地制造含氧化钛的炉渣的方法，其中抑制了二氧化钛的还原并使电力消耗最小化。 该方法包括以下步骤：在还原炉中加热包括氧化钛，氧化铁和碳质还原剂的原料混合物，或进一步包含氧化钙源的原料混合物; 减少混合物中的氧化铁以形成还原铁; 将所得混合物送入加热熔化炉; 在加热熔融炉中加热所得混合物以熔化还原铁并将还原铁与含氧化钛的炉渣分离; 并将含氧化钛的炉渣从炉中排出和回收。
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公开(公告)号：US07160353B2
公开(公告)日：2007-01-09
申请号：US10479584
申请日：2003-01-16
申请人： Isao Kobayashi , Itsuo Miyahara , Hidetoshi Tanaka , Koji Tokuda
发明人： Isao Kobayashi , Itsuo Miyahara , Hidetoshi Tanaka , Koji Tokuda
IPC分类号： C21B15/00
CPC分类号： C21B13/105 , C21B13/006 , C21B13/14 , C21B13/143 , C21B2100/44 , C21B2100/66 , C21C2250/02 , Y02P10/136
摘要： A method for making molten iron includes the steps of feeding a raw material mixture containing an iron oxide material and a carbonaceous reductant into a heating reduction furnace to reduce iron oxide in the raw material mixture with the carbonaceous reductant into solid reduced iron; transporting the solid reduced iron to a melting furnace; and combustion of a carbonaceous material supplied as fuel to melt the solid reduced iron in the melting furnace for producing molten iron. After the metallization of the solid reduced iron is enhanced to at least 60%, the solid reduced iron is transported to the melting furnace. The amounts of oxygen and the carbonaceous material supplied to the melting furnace are controlled so that the secondary combustion ratio of CO gas in the melting furnace is reduced to 40% or less. The heat transfer efficiency of the secondary combustion heat to the molten iron is preferably increased to at least 60%.
摘要翻译： 制造铁水的方法包括将含有氧化铁材料和碳质还原剂的原料混合物进料到加热还原炉中以将含碳还原剂的原料混合物中的氧化铁还原为固体还原铁的步骤; 将固体还原铁输送到熔炉; 以及作为燃料供应的碳质材料的燃烧，以熔化用于生产铁水的熔化炉中的固体还原铁。 在固体还原铁的金属化增强至少60％之后，固体还原铁被输送到熔化炉。 控制供给熔化炉的氧气和碳质材料的量，使得熔融炉中CO气体的二次燃烧比降低到40％以下。 二次燃烧热对铁水的传热效率优选增加至少60％。
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公开(公告)号：US07572316B2
公开(公告)日：2009-08-11
申请号：US10763239
申请日：2004-01-26
IPC分类号： C21B13/08
CPC分类号： C21B13/10 , C21B13/0073 , Y02P10/136
摘要： A method for manufacturing a reduced metal includes thermally reducing a metal oxide including a carbonaceous reductant disposed on a hearth moving in a reducing furnace, wherein the reducing furnace includes a plurality of primary burners for supplying fuel and primary combustion air, and a plurality of secondary combustion burners for supplying secondary combustion air; and wherein the primary combustion air and/or the secondary combustion air is oxygen-enriched air, the oxygen concentration in the primary combustion air supplied from at least one of the plurality of primary burners being controlled to be lower than the oxygen concentration in the secondary combustion air.
摘要翻译： 还原金属的制造方法包括：热还原金属氧化物，其包括设置在还原炉中移动的炉床上的碳质还原剂，其中所述还原炉包括用于供给燃料和初级燃烧空气的多个主燃烧器，以及多个次级 用于供应二次燃烧空气的燃烧燃烧器; 并且其中所述主燃烧空气和/或所述二次燃烧空气是富氧空气，将从所述多个主燃烧器中的至少一个供给的所述一次燃烧空气中的氧浓度控制为低于所述二次燃烧器中的氧浓度 燃烧空气。
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