Nickel processing - Extraction and refining | Britannica
Nickel processing - Nickel processing - Extraction and refining: The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. The major differences in equipment are the use of higher-temperature refractories and the increased cooling required to accommodate the higher operating temperatures in nickel
Fathi Habashi Handbook Of Extractive Metallurgy_ Primary
The Noranda reactor is a rotatable horizontal cylinder up to 21 m long with a diameter of ca. 5 m and lined with chrome-magnesite bricks. Its longitudinal section is shown in Figure 8.19. In normal operation the vessel remains stationary with 50-60 tuyeres on a level with the molten matte.
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Table 5.28: Production of refractories in Japan in 1000 t. Bricks Fireclay 50% A1 10 J Silica Chrome-magnesia Magnesia-carbon Dolomite-magnesia Zircon Silicon carbide lnsulants Others Unshaped Products (Mixtures) 1970 1800 191 260 284 88 75 1980 829 173 66 278 52 104 91 53 55 44 1990 325 155 7 126 123 13 52 27 27 35 1993 200 125 5 99 107 8 31
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, the dominant mountains are the Great Dividing Range (2200m) on the east and the Southern Alps (3700m) of New Zealand Mexico has also a variety of volcanoes including El Chichon (1200m) and Citlaltepetl (5400m).
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New Zealand as a comparison with the slower acceptance in the Australian colonies. 26 Lougheed, an economic historian, in ‗Cyanide and Gold‘ (2001), has written comprehensively on the technology transfer involved in the introduction of the cyanide process from Scotland to South Africa, New Zealand and the Australian colonies.
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New method may cut down workable grade of copper ore to 0.2-0.4% and to a minimum of 0.04%. Recently, the application of SX-EW method to low-grade ores that are hard to be processed like uranium, nickel, cobalt, zinc, tungsten and vanadium has accelerated remarkably. The prospect of the new aluminum smelting technique is cheerful.
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