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1. 发明授权

US4531971A Method of and apparatus for melting scrap 失效
标题翻译：熔融废料的方法和设备
公开(公告)号：US4531971A
公开(公告)日：1985-07-30
申请号：US568162
申请日：1984-01-04
申请人： Sabro Sugiura , Senji Fujita , Kenji Kanada , Noboru Demukai , Tetuo Okamoto
发明人： Sabro Sugiura , Senji Fujita , Kenji Kanada , Noboru Demukai , Tetuo Okamoto
IPC分类号： C21C5/52 , C21C5/56 , C21C7/00
CPC分类号： C21C5/565 , C21C5/5211 , C21C5/5217 , C21C5/527 , F27B3/085 , F27D3/18 , C21C2007/0093 , F27D2003/164 , Y02P10/216
摘要： A method of melting iron scrap using an arc furnace with reduced electric power consumption.In one of a pair of vessels which are arc furnace bodies, melting of the scrap by heat of arc is carried out while a carbonaceous material and oxygen-containing gas are introduced therein to cause oxidation of C to CO to make use of the oxidation heat. Thus formed hot exhaust gas containing CO is introduced to the other vessel of the pair and oxygen-containing gas is added thereto to cause oxidation of CO to CO.sub.2 thereby heating the scrap loaded in the vessel. Melting is further continued by changing the roles of the two vessels to each other.Generation of the CO-containing hot gas can be performed in a separately installed gasification furnace.
摘要翻译：使用电弧炉熔炼废铁的方法，降低电力消耗。在作为电弧炉体的一对容器中的一个中，通过电弧的热量熔化废料，同时将碳质材料和含氧气体引入其中以使C氧化成CO以利用氧化热。将这样形成的含有CO的热废气引入到该对的另一个容器中，并向其中加入含氧气体以使CO氧化成CO 2，从而加热装载在容器中的废料。通过改变两艘船的作用相互进一步地进行融化。含CO的热气体的生成可以在分开设置的气化炉中进行。

2. 发明授权

US4962291A Apparatus for production metal powder having a shielded runner nozzle gate 失效
标题翻译：用于生产金属粉末的装置，其具有屏蔽的流道喷嘴门
公开(公告)号：US4962291A
公开(公告)日：1990-10-09
申请号：US403440
申请日：1989-09-06
申请人： Senji Fujita , Noboru Demukai
发明人： Senji Fujita , Noboru Demukai
IPC分类号： B22F9/08
CPC分类号： B22F9/082
摘要： An apparatus is disclosed for producing metal powder having a molten metal holding vessel with a generally cylindrical shaped bottom portion, a molten metal discharging runner located at the bottom portion of the holding vessel, a spraying chamber connected at a lower end of the discharging runner, a first induction heating coil having a diameter and surrounding the holding vessel, a second induction heating coil surrounding the discharging runner, and a ring-shaped magnetic shielding plate disposed between the second induction heating coil and the sliding gate. The discharging runner has a nozzle portion which includes a sliding gate made of ceramic. The sliding gate is movable for controlling the flow of the molten metal through the nozzle portion of the discharging runner. The spraying chamber has gas-jetting nozzles. The second induction heating coil has a diameter smaller than a diameter of the first induction heating coil.

3. 发明授权

US4919714A Method and apparatus for refining steel 失效
标题翻译：炼钢方法及装置
公开(公告)号：US4919714A
公开(公告)日：1990-04-24
申请号：US270859
申请日：1988-11-14
申请人： Saburo Sugiura , Senji Fujita , Hiroya Nakata , Tetsuo Okamoto , Yoshio Inagaki , Keiichi Mizuguchi , Atsushi Ishii
发明人： Saburo Sugiura , Senji Fujita , Hiroya Nakata , Tetsuo Okamoto , Yoshio Inagaki , Keiichi Mizuguchi , Atsushi Ishii
IPC分类号： C21C5/28 , C21C5/35 , C21C7/068
CPC分类号： C21C7/0685 , C21C5/28 , C21C5/35
摘要： Disclosed are an improved method of refining steel and an apparatus for practicing the method.The refining method comprises, basically, carrying out the refining, particularly, decarburization, while stirring molten steel in the refining furnace by injecting gas thereinto, while supplying heat with a burner installed at the top of the furnace to the molten steel. According to this method, it is possible to start at an initial carbon content of the moltend steel lower than that of known AOD process, and complete the refining in a curtailed period of time and with a decreased oxidation loss of Cr. Thus, damage of refractory materials of the furnace is reduced, and the amount of Si necessary for reducing Cr-oxides in the latter stage of the refining is also reduced.Oxygen for the decarburization is supplied usually in the form of gas, but can be supplied from a solid oxygen source. In an alternative of the present method, powdery metal oxide, which is reducable equally to or more easily than Cr-oxides, is shot into the furnace through the burner or injected into the molten steel through a tuyere or an immersed lance.Preferably, the burner is of a type of variable flame length. Use of the burner disclosed here makes it possible to lengthened the flame at the former stage of the refining so that not only heat but also oxygen may be supplied to the molten steel surface of promoting the decarburization, and to shorten the flame at the latter stage of the refining so that only heat may be supplied.
摘要翻译：公开了一种改进钢的精炼方法和实施该方法的装置。精炼方法基本上包括进行精炼，特别是脱碳，同时通过在熔炼炉顶部的燃烧炉中对钢水进行加热，同时在精炼炉中搅拌钢液，同时向其中注入气体。根据该方法，可以从蜕变钢的初始碳含量开始低于已知AOD方法的初始碳含量，并且在缩短的时间段内完成精炼并且减少Cr的氧化损失。因此，炉的耐火材料的损伤减少，并且在精炼的后期阶段还原Cr氧化物所需的Si量也减少。用于脱碳的氧气通常以气体的形式提供，但可以由固体氧源供应。在本方法的替代方案中，与Cr-氧化物同等或更容易还原的粉末金属氧化物通过燃烧器喷射到炉中，或通过风口或浸入式喷枪注入钢水中。优选地，燃烧器具有可变火焰长度的类型。这里公开的燃烧器的使用使得可以在炼制的前一阶段延长火焰，使得不仅可以向钢水表面提供热量而且还可以提供氧气以促进脱碳，并且在后一阶段缩短火焰的精炼，使得仅可以提供热量。

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