The experimental investigation on dechloridizing of zinc oxide in rejects has shown that using caustic dross from cadmium smelting as neutrolizer could not only achieve higher dechloridizing rate and quick reaction, but also perfect the existing process, instead of using quick lime that leads to drop of dechloridizing rate with increase of feeding and blockage of equipment.

The adsorption characteristics of oxidized copper mine tailings on phosphate from aqueous solution were investigated under different pH conditions in this paper.