When using the anode carbon block a period of time, as anode consumed gradually, it has become very thin (about 13~18cm). In order to prevent the anode steel claw to be melt, it must be replaced new anode carbon block group.Anode scrap is the residual part of pre-baked anode carbon block. Reacting with electrolyte over a long period of time, anode scrap has high element of electrolyte, including aluminum, sodium, potassium, calcium, magnesium, lithium, fluorine ect.