Insoluble Crosslinked Starch Xanthate as a Selective Flocculant for Sulfide Minerals.
Termes-SC; Wilfong-RL; Richardson-PE
Pres At AIME Ann Meeting Dallas Texas, 1982 Feb; :8 pages
This paper discusses recent federal Bureau of Mines research on the selective flocculation of various minerals with insoluble crosslinked starch xanthate (isx). Isx is insoluble, has a shelf life of over a year when kept cold, and has a higher molecular weight due to crosslinking than the soluble noncrosslinked starch xanthate used in previous flocculation studies on nonsulfide minerals. Isx readily flocculates a number of sulfide mineral fines but not silicious gangue. Floc formation, floc size, and settling rate are strongly dependent on ph, with the ph dependence differing for each mineral. Bornite has been selectively flocculated from bornite-quartz mixtures, and the bornite containing flocs were separated from the unflocculated quartz using decantation and washing procedures.
Pres. At AIME Ann. Meeting, Dallas, Texas, Feb. 14-18, 1982, Reprint 82- 171, 8 PP.