imperial smelting process

imperial smelting process

[im′pir·ē·əl ′smel·tiŋ ‚präs·əs]
(metallurgy)
A pyrometallurgical process which treats a complex concentrated feed to a single furnace to recover zinc, copper, lead, cadmium, silver, gold, and other metals in one pass. Abbreviated ISP.
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In the EU there are ten zinc electrolysis plants and four lead-zinc shaft furnaces for reduction of mixed concentrates by the Imperial Smelting process, plus five attendant plants for zinc production by fractional distillation.
Lead production in the EU is from four lead-zinc shaft furnaces via the Imperial Smelting process and five other plants using new technologies i.
The basic design of the prototype plant is being prepared by Kilborn SNC-Lavalin Europe, and Imperial Smelting Process (ISP), a division of Rio Tinto, will carry out the preliminary design work on the condenser system.

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