铝电解中阳极涂层与磷生铁改性剂的综合优化实验

提高炭素阳极的强度和抗氧化性是目前铝电解研究的热点和难点.本文总结了在某铝厂400 kA系列磷生铁中加入改性剂和在阳极炭素表面涂盖耐高温防氧化涂层涂料的实验.加入磷生铁改性剂浇筑出的磷生铁具备更好的延展性和膨胀性,使炭块与钢爪之间接触电阻减少,钢爪与炭块间的连接更紧密,减少了脱极的几率,降低了铁?碳压降;使用防氧化涂层...

Comprehensive optimization experiment of anode coating and phosphorus pig iron modifier in aluminum electrolysis

In aluminum electrolysis field,enhancement of strength and oxidation resistance of carbon anode is the hotspot and difficulty.In this paper,a high-temperature-resistant and antioxidant coating was applied on the surface of carbon anode by adding phosphorus pig iron modifier to 400kA series phosphorus pig iron.The phosphorus pig iron poured with the modifier showed better ductility and expansibility.As a result,the contact resistance between the carbon block and the steel claw reduced,strengthening the connection between the steel claw and the carbon block.The probability of depolarization and iron-carbon pressure drop also decreased.The use of antioxidant coating greatly repressed the slag falling from carbon block,improved the current efficiency of aluminum electrolysis,and prolong the service cycle of anode.