The utility model relates to an arc induction melting device for electromelting magnesia, which comprises a furnace body, a three-phase electrode, an electromagnetic induction coil and an inner lining layer. The three-phase electrode is arranged inside the furnace body, an inner lining layer is arranged outside the inner lining layer, an inner lining layer is arranged inside the inner lining layer, and a refractory asbestos layer is coated between the inner lining layer and the electromagnetic induction coil. The advantages of the utility model are as follows: the magnesium lining layer is arranged in the utility model, which improves the safety factor of the equipment in the production process, guarantees the safety of the field operators and maintains a good operating environment; the electromagnetic induction coil arranged around the lining layer enables the equipment to form an effective heat storage space in the furnace body during the production process, which not only ensures the efficient utilization of heat energy, but also prevents the waste of energy. Moreover, the thickness of the skin sand layer formed during the production of fused magnesia is obviously reduced.
【技术实现步骤摘要】
一种电弧-感应熔炼电熔镁砂的装置
本技术属于矿石煅烧
,尤其涉及一种电弧-感应熔炼电熔镁砂的装置。
技术介绍
目前,电熔镁砂的生产在国内外普遍采用三相交流电熔法生产工艺,主要依靠电极的埋弧电热和物料的电阻电热来熔炼物料。由于氧化镁具有较高的熔点(2800℃以上),难以利用现有的高温材料为其制作坩埚,所以实际生产中多采用在生料中建立高温熔池,熔池建立后,缓慢提升电机,使熔池底部的熔体发生结晶,熔池顶部的生料在电弧高温作用下继续熔化,导致熔池整体上移,从而完成电熔镁砂的熔炼过程。由此可见,设备没有炉衬的有效保护,高温易导致炉体熔穿,在生产中设备安全系数较低,现场操作人员安全难以保障。同时,炉体保温措施差,三相电极通电后,电极通过电弧加热炉内原料,电弧一方面将热量熔化原料,另一方面又以热辐射的形式传到炉外,散发大量的热能,造成大量的热损失及能源浪费。另外,从传统的三相交流电熔法工艺生产电熔镁砂工艺可以看出,在现有生产工艺条件下,热量大量的散失导致熔坨最外层皮砂层较厚,在电极区有明显的空洞,表明电极提升之后,留下的空间没有被熔体填充,三根电极极心圆中心区域出现明显死 ...
【技术保护点】
1.一种电弧‑感应熔炼电熔镁砂的装置,其特征在于,包括炉体、三相电极、电磁感应线圈、内衬层,三相电极设置在炉体内部,炉体内壁设有内衬层,电磁感应线圈布置在内衬层外侧,内膜体布置在内衬层内侧,内衬层与电磁感应线圈之间涂覆有耐火石棉层。
【技术特征摘要】
1.一种电弧-感应熔炼电熔镁砂的装置,其特征在于,包括炉体、三相电极、电磁感应线圈、内衬层,三相电极设置在炉体内部,炉体内壁设有内衬层,电磁感应线圈布置在内衬层外侧,内膜体布置在内衬层内侧,内衬层与电磁感应线圈之间涂覆有耐火石棉层。2.根据权利要求1所述的一种电弧-感应熔炼电熔镁砂的装置,其特征在于,所述的内膜体是由钢板焊接为圆筒形结构。...
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