抄録
The effect of electroslag refining on removal of iron from commercial purity aluminum using KCl-NaCl-Na3AlF6 slag containing Na2B4O7 was studied. The iron content decreases with the decrement of the remelting speed and the iron content can decrease from 0.42% to 0.20 mass% after electroslag refining. The chemical reaction between melt and slag to form Fe2B in the electroslag refining process is the main reason for the reduction of iron content. Thermodynamic calculation of the chemical reaction theoretically accounts for the formation of Fe2B spontaneously in the electroslag refining process. The ultimate strength and elongation of commercial aluminum are improved obviously after electroslag refining.
