Φ110 mm圆柱形NiFe2O4基铝电解惰性阳极的制备及腐蚀行为OA
Preparation and corrosion behavior of Φ110 mm cylindrical NiFe2O4 based inert anode for aluminum electrolysis
针对大尺寸NiFe2O4基铝电解惰性阳极烧结过程中易开裂问题和长时间电解腐蚀行为,采用两步烧结法制备Φ110 mm圆柱形NiFe2O4基铝电解惰性阳极,重点研究制备工艺对阳极材料宏观形貌的影响和长时间电解行为.研究结果表明:烧结过程中严格控制降温机制和优化阳极摆放时受力分布状态,能有效降低大尺寸惰性阳极烧结开裂概率;80 h电解过程中槽电压相对稳定,阳极材料具备良好的高温稳定性;阳极表面出现分层现象,为80 μm厚度的相对致密层以及金属陶瓷本体层;电解产物铝中阳极组元Ni、Cu、Fe和Ti的质量分数分别为 0.294％、0.190％、0.526％、0.057％.
Φ110mm cylindrical NiFe2O4 based inert anodes for aluminum electrolysis have been prepared by a two-step sintering method in order to solve the problems of sintering cracking easily and long-time electrolytic corrosion of large size NiFe2O4 based inert anode.The key research focuses on the influence of the preparation process on the macroscopic morphology of the anode material and its long-term electrolytic behavior.The results show that the cracking probability of large inert anodes can be effectively reduced by strictly controlling the cooling mechanism and optimizing the force distribution during the sintering process.The cell voltage is relatively stable during 80 h electrolysis,the anode material possesses good high temperature stability.A stratification phenomenon is observed on the anode surface,consisting of a relatively dense layer of 80 μm thickness and the metal ceramic bulk layer.The mass fractions of anode components Ni,Cu,Fe,and Ti in the electrolytic product aluminum are 0.294％,0.190％,0.526％and 0.057％,respectively.
钱映;肖峰;张志刚
东北大学冶金学院,沈阳 110819西部超导材料科技股份有限公司,西安 710018东北大学冶金学院,沈阳 110819
矿业与冶金
NiFe2O4基金属陶瓷铝电解惰性阳极降温机制腐蚀行为相对致密层
NiFe2O4 based cermetinert anode for aluminum electrolysiscooling mechanismcorrosion behaviorrelatively dense layer
《材料与冶金学报》 2026 (1)
70-76,7
中央高校基本科研业务专项资金资助项目(N2325007).
评论