Electrolytic refining had the advantage that it separated out the silver from the copper.
2.
Soon after, in the 1870s, Electrolytic refining of gold was developed, the Wohlwill process, to deal with the problem of removing platinum from the gold.
3.
Electrolytic refining of copper was first patented in England by James Elkington in 1865 and the first electrolytic copper refinery was built in Newark, New Jersey, in 1883.
4.
Silver is also produced during the electrolytic refining of copper and by application of the Parkes process on lead metal obtained from lead ores that contain small amounts of silver.
5.
The Butte system, while sound, deliberately replaced to lower the load on the overtaxed electric system, which was primarily used for commercial uses, including electrolytic refining of copper and zinc.
6.
The results, Ms . Carlson knew, were " characteristic of modern silver, made after the mid-19th century when electrolytic refining processes made it possible to produce silver containing none of its natural impurities ."
7.
About 70 % of the world's primary lead production is still produced using the sinter plant blast furnace combination, and this combination was formerly often used in copper smelting ( at the Electrolytic Refining and Smelting smelter in Wollongong, New South Wales, for example ).
8.
Roasting generally leaves more sulfur in the calcined product ( 15 % in the case of the roaster at Mount Isa Mines ) than a sinter plant leaves in the sintered product ( about 7 % in the case of the Electrolytic Refining and Smelting smelter ).
9.
The move to end exporting cold blister copper from the Mount Isa smelter resulted in substantial energy savings, because the anode furnaces received molten blister copper from the converters, meaning that cold blister copper did not have to be reheated and melted before being cast into anodes for electrolytic refining.
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