Electrodewatering of Bayer muds-laboratory studies.
Baglin EG; McIntosh SM
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9153, 1988 Jan; :1-10
Research was conducted by the Bureau of Mines to determine the feasibility of using electrokinetic densification to dewater Bayer process red mud, magnetic black mud prepared by pressure digestion of red mud in the presence of ferrous sulfate, and magnetic black mud formed by simulated Bayer digestion of Jamaican bauxite with added ferrous sulfate. Tests showed that the solids content of presettled muds could be increased from 25 pct to approximately 40 to 48 pct by gravity draining followed by electrodewatering for approximately 48 h. Electrodewatering may not be practical because of increased reagent and processing costs and because the muds must be thoroughly wasted prior to electrodewatering to remove dissolved ions and decrease mud conductivities.
Mineral processing; Waste treatment
IH; Report of Investigations
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9153