Sustainable Mining and Metallurgy

Aiming at the problem of large off-gas flow of 180kA electrolysis series in an electrolytic aluminum plant, measures were taken to adjust the opening of off-gas valve and clean up the accumulated material in the gas collecting system. The statistical data showed that after the regulation, the off-gas flow under standard conditions dropped from 8075Nm ³/h of before regulation to 5086Nm ³/h, the heat dissipation of the off-gas dropped from 0.617V of before regulation to 0.529V; the DC power consumption has been lowered by 92kW·h/t-Al, and the power consumption for cleaning was reduced by 30kW·h/t-Al. In conclusion, the off-gas flow regulation and control have achieved ideal effect.