C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/20, 53/236
C22B 21/00 (2006.01) B03B 9/04 (2006.01) B03D 1/01 (2006.01)
Patent
CA 1129656
A process for the treatment of an-aluminum-salt slag produced in the remelting of aluminum by the addition of salt to aluminum scrap wherein the aluminum salt slag is sub- jected to pressure and impact rolling to a thickness of about 0.2 mm to about 1 mm and the product is milled to an X80 value of about 130 to 150 microns. The milled product is classified in a plurality of stages to recover therefrom a large-particle fraction consisting at least predominantly of aluminum partricles, and a fine-particle fraction. The fine particle fraction is subjected to flotation in at least one flotation stage to which a base is added in an amount of 0.04 to 0.4 g of the base per ton of the material subjected to flotation to bring the pH to between 10 and 11, whereupon a cation active collector of the formula R0-(CH2)n-NH-(CH2)n- -NH2 is added to recover an impurity-containing froth of low chloride level and a concentrate containing most of the chlorides of said slag.
331710
Bahr Albert
Kues Joachim
Bahr Albert
Borden Ladner Gervais Llp
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