METHOD AND DEVICE FOR THE RECOVERY OF LIQUID ALUMINUM BY COMPRESSION OF HOT SLAG

摘要

The method comprises the supply of the slag into a die up to a height which is a function of the die diameter, the height being less at the center than at the periphery of the die, and the application on the slag of a stamp that is lowered at a speed so much lower as the liquid aluminum concentration of the slag is small. The device comprises a cylindrical die (10) provided at each of its ends with a grain. This die lays on a base (3) having on its top face an annular groove (4); the lower grain (7) has a diameter at least equal to the inner diameter of the groove and in all cases smaller than the outer diameter and has a continuous top face of conical shape; the space (16) between the wall of said grain and the inner wall of the die is of constant width and faces the groove. The invention is applied to the aluminum industry, for the processing of slag in economical and good health conditions.