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Metal recovery is the final step in a hydrometallurgical process, in which metals suitable for sale as raw materials are produced. Sometimes, however, further refining is needed to produce ultra-high purity metals. The main types of metal recovery processes are electrolysis, gaseous reduction, and precipitation.
The Mond process, sometimes known as the carbonyl process, is a technique created by Ludwig Mond in 1890, [1] to extract and purify nickel. The process was used commercially before the end of the 19th century, [ 2 ] and particularly by the International Nickel Company in the Sudbury Basin . [ 3 ]
The hydrometallurgical process in the plant will pressure-leach the nickel ore concentrate in acidic solutions to separate iron, sulfur and other impurities from nickel, copper and cobalt. [5] On June 11, 2018, Premier Dwight Ball announced Vale is moving forward with its underground mine at Voisey's Bay.
Hydrometallurgical processes include high-pressure acid leach (HPAL) and heap leach, both of which are generally followed by solvent extraction – electrowinning for recovery of nickel. Another hydrometallurgical routes is the Caron process , which consists of roasting followed by ammonia leaching and precipitation as nickel carbonate.
Soon after developing its Kambalda nickel deposit, the Western Mining Corporation, WMC, started looking into the possibility of producing refined nickel.The company decided to use the Sherritt Gordon hydrometallurgical ammonia-leach process for this purpose and selected Kwinana as the location for its new refinery, based on the availability of power and water supply, raw materials and the ...
Metal recycling and reuse can reduce the mining burden of the renewable energy transition. Hydrometallurgical and pyrometallurgical recycling processes (shown in the graphic as “recycle ...
The Ravensthorpe Nickel Mine is a nickel mine and hydrometallurgical processing plant located at Bandalup Hill, 35 km (22 mi) east of Ravensthorpe, Western Australia. Built by BHP Billiton , it was closed in January 2009, after less than a year of operation due to a collapse in the price of nickel.
Two hydrometallurgical methods have been developed to extract nickel and cobalt from nickel laterites, these processes are called sulphuric acid leaching and reduction roast-ammonia leaching. For high-magnesium silicates in lower profiles laterites the exploitation method used is smelting.