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公开(公告)号：US3752895A
公开(公告)日：1973-08-14
申请号：US3752895D
申请日：1972-06-06
IPC分类号： C04B35/657 , F27D3/15 , F27D3/16
CPC分类号： C04B35/657 , F27D3/1509 , F27D3/16
摘要： Furnace has carbon electrodes suspended in a refractory-lined melting pot with a tap hole in the middle of a front wall portion thereof. A water-cooled copper lance sealably and removably engages the tap hole for injecting reactive gas into a molten charge in the pot. The lance has a tapered portion for sealably engaging the walls of the tap hole and has a stubby end as the only part thereof protruding inside of and facing into the pot. The stubby end has a plurality of jet orifices for discharging reactive gas, which orifices have axes disposed at an acute downward angle from the horizontal and in a divergent fan-like pattern in the direction of gas flow in the lance. Furnace is operated to produce molten oxidic refractory material by providing a shallow pool of that molten material in the pot, electrically melting further oxidic refractory material by means of the electrodes to enlarge the pool, engaging the water-cooled lance in the tap hole and causing reactive gas, e.g., oxygen, to flow from the lance into the pot, tilting the furnace forward to cause the pool surface to rise above the tap hole and to effect injection of gas into the pool with stirring thereof, then backtilting the furnace after a predetermined time of lancing, discontinuing flow of the gas and removing the lance from the tap hole in preparation for fusion-casting the pool.
摘要翻译： 炉子具有悬浮在耐火材料衬里的熔炉中的碳电极，在其前壁部分的中间具有抽头孔。 水冷铜喷枪可密封地并且可拆卸地接合在排水孔中，用于将反应性气体注入锅中的熔融装料。 喷枪具有锥形部分，用于可密封地接合排水孔的壁，并且在其内部突出并面向锅中的仅一部分具有粗短的端部。 粗短的端部具有用于排放反应性气体的多个喷射孔，该喷嘴具有沿水平方向以水平方向呈锐角向下倾斜的方式设置并沿着喷枪中的气体流动方向以分散的扇形图案布置。 通过在锅中提供熔融材料的浅池，通过电极将另外的氧化耐火材料电解熔化以扩大池，使接头与水龙头孔中的水冷喷枪接合并引起 反应气体（例如氧气）从喷枪流入锅中，向前倾斜炉子以使池表面升高到排水孔上方，并在搅拌下将气体注入池中，然后将炉子后倾 在预定的穿刺时间之后，停止气体的流动并从排气孔中移除喷枪以准备熔池浇注池。
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公开(公告)号：US3818112A
公开(公告)日：1974-06-18
申请号：US35587773
申请日：1973-04-30
CPC分类号： C03B5/1677 , C03B5/027 , G05F1/445 , G05F1/455 , H05B3/0023 , Y10S65/04
摘要： An electrical furnace particularly suitable for melting thermoplastic material used in producing glass fibers includes a tank having side walls constructed of a refractory material having an electrical conductivity greater than the material being melted at furnace melting temperature. In order to minimize electrical conduction through the side walls, first and second sets of electrodes are arranged with one set centrally disposed in the tank and the other set surrounding the first. Electric power is applied between the first and second electrodes to generate a potential field with substantially continuous equipotential lines between the second electrodes so as to shield the first electrodes from the side walls. An electrical control circuit limits the current flow between any two electrodes to prevent a runaway condition which might otherwise be caused by the steep negative temperature-resistivity characteristics of the glass. The control circuit includes a circuit which minimizes the DC component from current flow between the electrodes.
摘要翻译： 特别适用于熔融生产玻璃纤维的热塑性材料的电熔炉包括一个槽，该槽具有由熔化温度高于熔化材料的导电率的耐火材料构成的侧壁。 为了最小化通过侧壁的电传导，第一组和第二组电极被布置成一组集中设置在容器中，另一组围绕第一组设置。 在第一和第二电极之间施加电力以产生在第二电极之间具有基本上连续的等电位线的电势场，以便屏蔽第一电极与侧壁。 电气控制电路限制任何两个电极之间的电流流动，以防止否则可能由玻璃的陡负温度 - 电阻率特性引起的失控状况。 控制电路包括使电流之间的电流流动使DC分量最小化的电路。
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