Aluminum Prebaked Anode Quality

Anode is the one of the technique keys in cell, it is often called a heart of the aluminum electrolysis and the most constituted the part.The quality will affect normal production in aluminum smelting and economic technique target directly, therefore improving the anode quality seem to be particularly for importance.According to the producing experience in CHALCO, this text studied the problem in the bake anode production line, excluding the raw material, the burning temperature, improving the formulation and the result of kneading and the bake management etc. Taking into the analysis to adopt the measure.From the production practices, exploring the path of the improving anode quality, main research contents and the main research conclusion are:(l)The influence factor of the bake anode quality has been studied, the result is that raw material quantity is a premise, modeling is a key, baking system is to guarantees.(2) The research of the petroleum carbon quality is done, it expresses that the petroleum carbon should establish in addition to controling its physics and chemistry sign, a formal standard for distributing because of its very importantly.(3) Proceeded the research of the quality of pitch , the soften point is surely important, but the others also can't be neglect.Its methyl benzene to be not dissolve thing particularly not less than 28%, theQI to be not dissolve thing contains in 8% ~ 12%, 3 resin at 18% ~ 25% for proper.(4) The research of calcinations is that the temperature should keep in the higher level, attaining 1240~ 1300℃, real density should attain 2.00-2.05 g/cm3.(5) the research of green anode production expresses that its stable process condition determines mostly baked anode quality. Especially, amount of dust -0.074mm should be strictly controlled, because the fluctuation of anode quality may occur due to poor control of dust proportion. The importance of stability of anode quality is not less than中南大学硕士学位论文ABSTRACTimPortance of inereasing its quality figure.Kneading quality 15 linkedwith anode behavior. (6)The researeh of baking exPresses that the heating rate duringmedium baking stage,soaking temPerature and time and uniformitydistribution of temPerature in the flue affecting bulk density, eleetricalresistance and visual quality rate,should be strietly controlled. Passing the imProving of eraft,stabilizing to the green anode quality,Prebakeanode extemal apPearance quality andP冲sies and ehemistrysigns became better, Phenomenon ofdroPing and taking of the Prebakeanode 15 lower obviously in electrolys 15 Proeess,the retuming butts veryeven,each weight 15 1 30一1 50kg,using Period from original design from25 to 27 dayses,the anode consume from the original 594 kg/t一AI to the564 kg/t一AI.