Metallic Waste Solutions Pty Ltd.

Neal Barr

Raymond Walter Shaw

A process for recovering zinc from a zinc containing material, the process including the steps of: leaching the zinc containing material with an alkaline lixiviant comprising an aqueous mixture of NHand NHCl, or ionic equivalent, having a NHCl concentration of between about 10 g/L and about 150 g/L HO and a NHconcentration of between 20 g/l HO and 250 g/L HO, to produce a zinc containing leachate; stripping ammonia from the leachate to produce a stripped liquor which includes a zinc containing precipitate, the stripped liquor having a NHconcentration of between 7 and 30 g/L HO; and recovering the zinc from the stripped liquor.

Growing community of inventors

Auckland, New Zealand

Neal Barr