【作者】 陈晓洪；

【导师】 冯乃祥； 李希明；

【作者基本信息】 东北大学 ， 冶金工程， 2008， 硕士

【摘要】 铝电解槽是铝电解工业中的核心设备,其性能直接影响着生产指标。电解槽寿命的长短,不仅关系到大修费用、铝的产量和质量,更关系到铝的成本和整个铝企业的效益。本文介绍了铝电解槽的演变的历史及进程。通过对电解槽破损征状的特征及典型槽破损的类型的观察总结,深入对破损原因进行了分析,得出了电解槽破损主要是阴极内衬和槽体破损的结论,并对破损机理作了深入剖析。根据中铝河南分公司1999年投产的85KA电解槽槽壳变形情况的观察,并对近期大修的部分电解槽槽壳变形尺寸进行了测量,据此描述了槽壳变形情况。对85KA电解槽槽壳结构进行了受力分析,并在此基础上,对现有槽壳的大修理提出了修补方案。对中铝河南分公司铝电解槽内衬结构的逐步优化及所取得的良好效果作了介绍。在优化内衬结构中,中铝河南分公司采用了硅酸钙纤维板,干粉防渗料,异型侧部炭块等新型耐火材料,并对TiB2-C一体化复合阴极、氮化硅-碳化硅+碳(Si3N4-SiC+C)复合侧壁等进行了试验,对提高内衬热阻,降低侧壁热阻,取得了良好的效果。根据国内阴极碳素材料产品现状,对阴极内衬筑炉施工工艺进行优化。应用了新型的FR-3Z捣固机和自制研发的覆盖式红外线阴极加热罩,提高了筑炉质量,保证了筑炉施工的稳定性。实践证明,优化的铝电解槽阴极对保证85KA铝电解槽稳定生产,降低电耗,提高电流效率起到了积极的作用。直流电耗下降至13700kWh,电流效率稳定在92.05%。更多还原

【Abstract】 Aluminum electrolysis cells is the core equipment in aluminum electrolysis industry, and its performs can affect the producing index directly. The cell life relates not only the funds for overhaul and the throughput and the quality of aluminium, but also the aluminum cost and the benefit of whole aluminium enterprise.The paper introduced the develpment and history of aluminium cell. By observing the signs of cell breakage and the clasific cell breakage styles, and deeply analyzing the reasons of cell breakage, the paper got the conclusion that the cell breakage mainly is the breakage of cathode lining and cell body. Besides, it deeply analyzed the breakage mechanism.Based on observing the pot shell deformation of 85KA cell which went into operation in smelting plant of Chalco Henan Branch,1999, we measured a part of pot shell deformation overhauled precently, and discribed the condition of pot shell deformation.We analyzed the bearing pressure of the pot shell of 85KA cell, and based on it, the paper pointed out the reparation plan for overhauling the existing pot shells.The paper introdued the gradual development of cell lining in smelting plant of Chalco Henan Branch and the good results. During optimizing the lining structure, the plant adopted calcium silicate fibreboard, dry powder impervious material, new style fireproofing material (such as deformed side cabon etc.), tested TiB2-C integrated cathode, Si3N4-SiC+C compound side wall and so on, improved the heat resistance of lining, reduced the heat resistance of side wall, and got good results.According to the present condition of Chinese cathode cabon material, we optimzed the building furnace process of cathode lining, applied newFR-3Z tamping machine and covered infrared cathode heating coat which was invented by ourselves, advanced furnace quality, and ensured the stability of building furnace.Through practices, we find that optimzing cathode is good for operating 85KA cell stably, reducing electricity consumption, and improving the current effectivity. When DC consumption reduces to 13700kWh, the current effectivity stably keeps 92.05%.更多还原