Nickel can never be the major metal in laterites but it certainly is in some sulphide ore deposits in ultramafic volcanic rocks and especially in komatiites Guilbert and Park 1986 362 367 where massive sulphides form puddles that have separated from the silicate lavas immediately above them Nickel sulphide ores are also found in
·ABSTRACT Polymetallic nodules and nickel laterite ores are composed of various valuable metals and have similar nickel concentration which makes them ideal alternatives for industries seeking to meet the increasing demand for nickel resources The
Supergene nickel ores formed by weathering of ultramafi c bodies represent approximately 42% of the global resources plus reserves and stand at approxi mately 160 Mt nickel Elias 2002 New Caledonia retains approximately 7% of this global amount and ranks fourth among the world s nickel ore producers
·The section on nickel ores is divided into two broad classifications sulfide and lateritic ores Greater emphasis is given to the sample preparation of laterites since they are more difficult to handle and many laboratories do not have as much experience working with them as with sulfides Each broad classification is broken down into the
Nickel resists corrosion and is used to plate other metals to protect them It is however mainly used in making alloys such as stainless steel Nichrome is an alloy of nickel and chromium with small amounts of silicon manganese and iron It resists corrosion even when red hot so is used in toasters and electric ovens
·lower grade nickel laterites ores Hydrometallurgical projects of recent years have focused on HPAL and have been largely unsuccessful economi cally so far adapted to take this nickel intermediate giving them significant potential benefits especially as nickel laterite ore grades diminish The nickel production
·Several large nickel deposits have been discovered elsewhere in Africa but until recently their development has been hindered by political risk and limitations in energy and transport infrastructure
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