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Recovery of phosphates and metals from waste phosphate sludge by reduction-sinter processes.
Waters-RF; Powell-HE; Cochran-AA
NTIS: PB 201 891, 1971; :1-10
The Bureau of Mines developed laboratory-scale processes to recover sodium phosphates and metal values from waste sludges generated by the phosphate treatment of automobile and appliance components. After treatment of the sludge with naoh, followed by coke or hydrogen reduction and sintering, zinc and lead were recovered as fume; the sinter was separated by leaching into a metallic product, chiefly iron and nickel, and high-purity disodium or trisodium phosphate.
Laboratory techniques; Laboratory testing; Mining; Metals; Sodium compounds; Phosphoric acid; Inorganic chemicals; Inorganic salts
IH; Report of Investigation
NTIS Accession No.
NTIS: PB 201 891
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division