EFFECT OF BAKING TEMPERATURE AND ANODE CURRENT-DENSITY ON ANODE CARBON CONSUMPTION

The electrolytic anode carbon consumption (CC) was studied as a functi on of anode baking temperature (BT) and anode current density in a clo sed laboratory cell, where the anode gas was absorbed and also monitor ed on a CO/CO2 analyzer. The CC referred to Faraday's law was determin ed from the weight loss of the anode, the carbon gasification (CG) fro m the amount of absorbed anode gas, and the formation of carbon dust ( CD) by the difference. The CC decreased by about 9 pet per 100 degrees C increase in BT, and it increased with decreasing anode current dens ity, particularly at low current densities. The CG and CD showed simil ar trends. The excess CG, which was attributed to the Boudouard reacti on (CO2 + C = 2CO), showed a relative decrease with increasing current density, although the overall rate of the reaction increased.