The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2019
Filed:
Mar. 13, 2018
Steel Dynamics Investments Llc, Fort Wayne, IN (US);
Raymond Walter Shaw, Melbourne, AU;
Neal Barr, Normanville, AU;
Steel Dynamics Investments LLC, Fort Wayne, IN (US);
Abstract
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.