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稀土冶炼电解槽余热取热试验研究
Authors
史维秀
李博
+4 more
杨欢
潘利生
陈红迪
魏小林
Publication date
18 September 2020
Publisher
Abstract
冶金行业能耗巨大,稀土冶炼工艺具有同样特点,采用熔盐电解法制备稀土金属时,冶金槽侧壁和冶金槽内熔融液体上表面向外散发出大量热量,并且冶炼过程伴随产生酸性气体。针对稀土冶炼过程中,电解槽以辐射和对流换热的方式向外散失大量余热问题,搭建了稀土冶炼模拟试验槽,采用燃煤放热获得相似的槽内温度场,采用冷却水与模拟电解槽侧壁进行对流换热、与模拟电解槽高温辐射面进行辐射换热,开展稀土冶炼过程中槽壁余热换热和顶部辐射余热换热试验研究。结果表明,槽壁余热换热量随水流量的增大呈上升趋势,水流量对槽壁余热换热量的影响强于辐射受热面与模拟槽顶面距离对其的影响。在试验条件下,模拟槽辐射受热面距离模拟槽顶面0.2 m、水流量为0.285 kg/s时,槽壁余热换热量最大可达2.256 kW。辐射余热换热量受辐射受热面与电解槽顶面距离的影响较大,随辐射受热面与电解槽顶面距离的减小呈增大趋势。辐射受热面与电解槽顶面距离为0.1 m时、水流量为0.292 kg/s时,辐射余热换热量与总余热换热量达到最大值,分别为19.541 kW和21.114 kW。基于试验数据推算的电解槽实际运行工况下辐射余热换热量可达52.796 kW,总余热换热量最大可达83.237 kW,占电解槽总电耗的55.5%,可为研发稀土冶炼工艺的节能减排技术、实现能源的合理利用提供依据
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Institute Of Mechanics,Chinese Academy of Sciences
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Last time updated on 25/11/2020