Recovery of metals and phosphates from waste phosphate sludge.
Waters-RF; Powell-HE; Cochran-AA
Met Finish 1971 Aug; 69(8):39-42
Waste sludges from phosphate treatment of automobile and appliance components were processed in the laboratory to recover metal values and trisodium phosphate. After treatment of the sludge with naoh, followed by hydrogen reduction and sintering, zinc and lead were recovered as fume; the sinter upon leaching was separated into a metallic residue, chiefly iron and nickel, and high-purity trisodium phosphate. The process offers an antipollution alternative in disposing of phosphate sludges in which there is an economic incentive to recycle the valuable materials.
OP; Journal Article
Metal Finishing; Preparation, Electroplating, Coating