公开(公告)号：US4565574A

公开(公告)日：1986-01-21

申请号：US673174

申请日：1984-11-19

申请人： Hiroyuki Katayama ,  Hidetake Ishikawa ,  Masatoshi Kuwabara ,  Chikara Saito ,  Tuneyuki Inoue ,  Masaki Fujita

发明人： Hiroyuki Katayama ,  Hidetake Ishikawa ,  Masatoshi Kuwabara ,  Chikara Saito ,  Tuneyuki Inoue ,  Masaki Fujita

IPC分类号： C22C33/00

CPC分类号： C22C33/003

摘要： A process which enables high-chromium alloy such as ferrochromium heretofore obtained by the use of electricity to be produced less expensively in higher yield of chromium by the smelting reduction using solid carbonaceous material such as coke in the place of electricity.The process of smelting reduction is so performed in the top and bottom blowing converter divided into two stages: the first stage for carrying out the converter operation under continued supply of the raw materials containing pre-reduced chromium oxide (chromium ore) and the second stage for carrying out the converter operation under suspended supply of the raw materials containing the pre-reduced chromium oxide, and the first stage of converter operation is carried out under conditions such that the temperature of the molten metal remains at or below 1,650.degree. C. and the ratio of the volume of the gas generated per minute by the substances supplied through the tuyere for bottom blowing to the combined weight of the molten metal and the molten slag falls in the range of 100 to 2,500 [Nl/min.t] and the second stage of converter operation is carried out under conditions such that the temperature of the molten metal remains at or below 1,650.degree. C., the ratio of the volume of gas generated per minute by the substances supplied through the tuyere for bottom blowing to the combined weight of the molten metal and the molten slag falls in the range of 100 to 1,800 [Nl/min.t].

摘要翻译： 通过使用电而获得的高铬合金，例如通过使用电而不是通过使用诸如焦炭等固体碳质材料代替电的熔融还原来生产较高产率的铬的方法。 熔炼还原过程在上下吹风转炉中分为两个阶段：第一阶段为继续供应含有预还原氧化铬（铬矿）的原料和第二阶段进行转炉运行 用于在含有预还原的氧化铬的原料的悬浮供应下进行转化器操作，并且转炉操作的第一阶段在使熔融金属的温度保持在等于或低于1650℃的条件下进行， 由通过用于底吹的风口供给的物质每分钟产生的气体的体积与熔融金属和熔融渣的组合重量的比率落在100-2,500 [N1 / min.t]的范围内，并且 转炉操作的第二阶段在熔融金属的温度保持在等于或低于1650℃的条件下进行，气体发生器的体积比 通过通过用于底吹的风口供给的物质与熔融金属和熔融渣的组合重量，每分钟的分数落在100-1,800 [N1 / min.t]的范围内。

公开(公告)号：US4662937A

公开(公告)日：1987-05-05

申请号：US737406

申请日：1985-05-24

申请人： Hiroyuki Katayama ,  Hidetake Ishikawa ,  Masatoshi Kuwabara ,  Hiroyuki Kajioka ,  Masaki Fujita ,  Kenji Shibata ,  Yoshiaki Tamura ,  Takashi Shimanuki

发明人： Hiroyuki Katayama ,  Hidetake Ishikawa ,  Masatoshi Kuwabara ,  Hiroyuki Kajioka ,  Masaki Fujita ,  Kenji Shibata ,  Yoshiaki Tamura ,  Takashi Shimanuki

IPC分类号： C21C5/35 ,  C22C33/00 ,  C22B47/00

CPC分类号： C22C33/003 ,  C21C5/35

摘要： There is provided a process for producing a high-manganese iron alloy from a manganese ore and/or a pre-reduced product thereof in a top and bottom blown converter type reaction vessel holding molten iron or a molten manganese iron alloy, together with a molten slag, said molten iron or alloy and said molten slag being the products of a separate smelting furnace, gas being blown into said vessel through a bottom blowing nozzle, said process comprising charging said vessel with a supply of raw materials including at least one source of manganese and iron selected from a manganese ore containing manganese oxide and iron oxide and a pre-reduced product thereof, a solid carbonaceous substance and a slag forming agent, while simultaneously blowing gas selected from oxygen and a gas containing oxygen into said vessel through a top blowing lance to burn said carbonaceous substance so as to heat, melt and reduce said raw materials to form a melt containing manganese oxide and iron oxide; supplying an additional carbonaceous substance into said melt to reduce said manganese oxide and said iron oxide to form a molten high-manganese iron alloy and a molten slag, discontinuing said blowing of gas through said top blowing lance, and removing said molten high-manganese iron alloy and said molten slag from said vessel, said molten alloy being used for casting.

摘要翻译： 本发明提供一种在含有铁水或熔融锰铁合金的顶部和底部转化型反应容器中从锰矿石和/或其预还原产物生产高锰铁合金的方法，以及熔融 熔渣，所述熔融铁或合金，所述熔融炉渣是单独熔炼炉的产物，气体通过底吹喷嘴吹入所述容器中，所述方法包括向原料供应原料，该原料包括至少一种 选自含有锰氧化物和氧化铁的锰矿及其预还原产物，固体碳质物质和成渣剂的锰和铁，同时通过顶部将从氧气和含氧气体中选出的气体吹入所述容器中 吹枪吹烧所述碳质物质，以加热，熔化和还原所述原料以形成含有氧化锰和氧化铁的熔体; 向所述熔体中提供另外的碳质物质以减少所述氧化锰和所述氧化铁以形成熔融的高锰铁合金和熔渣，停止通过所述顶吹喷枪吹入气体，并且除去所述熔融的高锰铁 合金和来自所述容器的所述熔渣，所述熔融合金用于铸造。