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1. 发明授权

US5444733A Electric arc furnace with alternative sources of energy and operating method for such electric furnace 失效
标题翻译：具有替代能源的电弧炉和这种电炉的操作方法
公开(公告)号：US5444733A
公开(公告)日：1995-08-22
申请号：US238060
申请日：1994-05-04
申请人： Giovanni Coassin , Corrado De Cecco , Gianni Gensini , Sergio Gerussi
发明人： Giovanni Coassin , Corrado De Cecco , Gianni Gensini , Sergio Gerussi
IPC分类号： C21C5/52 , F27B3/08 , F27B3/20 , F27B3/22 , F27D99/00 , F27D1/00
CPC分类号： F27B3/205 , C21C5/5217 , F27B3/085 , F27B3/225 , F27D2099/0048 , Y02P10/143 , Y02P10/216
摘要： Electric arc furnace with alternative sources of energy, which functions with direct current or alternating current and comprises at least one lance (12) to inject pure or combined oxygen above the bath (16) and a plurality of tuyeres (13) positioned in the hearth of the furnace (10) to inject oxygen below the bath, the tuyeres (13) being cooled by a peripheral movement of a cooling mixture consisting of at least one gas having a high cooling power (methane, butane, inert gases, etc.) and of at least one diluting gas (nitrogen, carbon dioxide), pipes (15) being included to introduce additives and powdered coal, post-combustion burners (28) possibly being comprised, the tuyeres (13) including an oxygen delivery pipe (18) having a diameter greater than 8 mm., the oxygen pressure being capable of being modulated according to the working steps, there being a constant minimum pressure of delivery. Melting operating method associated with such an electric furnace, wherein the charging operation with each single charge (skip) is divided into defined periods, with which are associated a pressure of delivery of oxygen through the tuyeres (13) and a percentage of gas having a high cooling power and proportioned to the rate of flow of the oxygen, there being a minimum pressure of delivery of oxygen in each moment of the working of the furnace (10).
摘要翻译：具有替代能量源的电弧炉，其具有直流或交流电的功能，并且包括至少一个喷枪（12）以在浴（16）上方注入纯净或组合的氧气，以及多个位于炉膛中的风口（13）的炉子（10）中以将氧气注入到熔池下方，风嘴（13）由冷却混合物的周边运动冷却，冷却混合物由至少一种具有高冷却能力的气体（甲烷，丁烷，惰性气体等）组成，以及至少一个稀释气体（氮气，二氧化碳），包括引入添加剂和粉煤的管道（15），可能包括的燃烧后燃烧器（28），所述风口（13）包括氧气输送管道（18）），氧气压力能够根据工作步骤进行调节，存在恒定的最小输送压力。与这种电炉相关联的熔化操作方法，其中每个单次充电（跳过）的充电操作被划分为限定的时间段，通过风口（13）与氧的输送压力相关联，并且具有高的冷却功率并且与氧气的流量成比例，在炉子（10）的每个工作时刻都有最小的氧气输送压力。

2. 发明授权

US5802097A Melting method for an electric ARC furnace with alternative sources of energy and relative electric ARC furnace with special burner positioning 失效
标题翻译：具有替代能源的电ARC炉的熔化方法和具有特殊燃烧器定位的相对电弧炉
公开(公告)号：US5802097A
公开(公告)日：1998-09-01
申请号：US583727
申请日：1996-01-17
申请人： Gianni Gensini , Matteo Losciale , Corrado De Cecco
发明人： Gianni Gensini , Matteo Losciale , Corrado De Cecco
IPC分类号： C21C5/52 , F27B3/20 , F27B3/22 , F27D1/00
CPC分类号： F27B3/225 , C21C5/5217 , F27B3/205 , Y02P10/216
摘要： Melting method for an electric arc furnace with alternative sources of energy for the melting of iron-based alloys, the electric furnace (10) including tuyeres (13) positioned on the bottom to deliver oxygen, at least one tuyere (15) to deliver coal dust which works in the area of contact between the bath of molten metal (16) and the layer of slag (22), at least one supersonic lance (12) cooperating with a lance (29) to deliver coal dust, these lances (12, 29) having a working position (12c, 29c) in which the supersonic lance (12) is positioned in close proximity to the surface of the molten metal (16) and the lance (29) to deliver coal dust is positioned in the vicinity of the surface of the layer of slag (22), and a plurality of burners (28) positioned on the cooled sidewalls (31) of the furnace (10) and delivering oxygen-based gases and combustible substances, whereby at least two first burners (28) work with the action of one burner supporting the action of the next one, the furnace (10) being charged with one or more charges which provide for a first step of start-up of the melting and a second step of melting, a refining step and a tapping step being included, in which method in the first step of start-up of the melting at least one second burner (28e) collaborates in freeing quickly the path of introduction of the supersonic lance (12) and of the lance (29) to deliver coal dust.
摘要翻译：一种具有用于铁基合金熔化的替代能源的电弧炉的熔化方法，所述电炉（10）包括位于底部以输送氧的风口（13），至少一个风口（15）以输送煤在熔融金属（16）的熔池与炉渣（22）之间的接触区域中工作的灰尘，至少一个与喷枪（29）配合以输送煤尘的超音速喷枪（12），这些喷枪，29），其中超音速喷枪（12）位于靠近熔融金属（16）表面的工作位置（12c，29c）上，并且用于输送煤尘的喷枪（29）位于附近（22）的表面的多个燃烧器（28）和位于炉（10）的冷却的侧壁（31）上的多个燃烧器（28），并且输送氧气和可燃物质，由此至少两个第一燃烧器（28）在一个燃烧器的作用下工作，支持下一个燃烧器的动作 e（10）被带有一个或多个电荷，其提供熔化启动的第一步骤和熔化的第二步骤，包括精炼步骤和攻丝步骤，其中在第一步骤中开始的方法熔化的至少一个第二燃烧器（28e）的协同作用可以快速释放超声波喷枪（12）和喷枪（29）的引入路径，以输送煤尘。

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