Wohlwill process - Wikipedia
The Wohlwill process is an industrial-scale chemical procedure used to refine gold to the highest degree of purity 99.999% . The process was invented in 1874 by Emil Wohlwill. This electrochemical process involves using a cast gold ingot often called a Doré bar of 95% gold to serve as an anode. when the contaminating metal is silver or one of the platinum group elements.
Continuous silver refining cell - Noranda Inc.
31 Mar 1992 A continuous silver refining cell comprises a tank containing an electrolyte at least a mud containing gold and other precious metals from the bottom of the cell. The impure silver anodes often called Dore anodes formed during against a disk by an air cylinder 54 having a double end piston rod 56.
Precious Metal Refining Process The Perth Mint
As with gold dore the silver dore is weighed melted assayed and outturned. The electrolytic silver refining process is similar to gold except that the silver anodes
From Anode slime to silver doré From Anode slime to - LBMA
Silver ca. 1000 t and Gold ca. 30 t from PM containing slimes sweep and fines computer scrap and PM alloys. Anode slime product from electrolytic refining
OuTOTec SIlveR RefInIng PlanT
The slime is collected inside anode bags surrounding silver Doré anodes and can be further processed using the Outotec Gold Refining process for recovery of
Bangalore Refinery Pvt. Ltd. And Others S v. Commissioner
Since gold Dore bar is an alloy of gold and silver it would be treated as gold by a form of gold since the entire process from copper extraction from copper ore/ no exemption to dore anode as it emerges due to manufacturing process from ingots bars blocks slabs billets shots pellets rods sheets foils and wires.
Analysis of selected technologies of precious metal - Sciendo
where dore& 39;s metal was smelted in the baking ovens which was then refined The technology of obtaining silver from anode slimes covers the following basic silver gold platinum arsenic tin antimony bismuth tellurium germanium and indium. Of Semi-finished products used in jewelery – tubes rods wires tapes.
CA2760354A1 - Method for processing precious metal source
0010 Silver and gold may be recovered from the anode mud by using concentrated fusions to provide a dore bullion of silver gold and platinum group metals. Every hour the liquor was gently stirred by hand using a glass stirring rod. 所 Ag and Au extracting and Sb Bi Cu and Pb recovering process from lead slime.
Birla Copper Ltd. vs Commissioner Of Central Excise on 21
21 Aug 2006 The residue of dore anode after extraction of gold and silver consist of bars blocks slabs billets shots pellets rods sheets foils and wires.
US5620586A - Silver electrolysis method in Moebius cells
Dore anodes are refined by electrolysis to produce pure silver metal at the anode mud containing gold and other precious metals present in the Dore anode. therein such as by way of a conductive rod extending down into the basket.
gold and silver processfrom dore anode rods