Genesis and types of nickel laterites. Lateritic nickel ores formed by intensive tropical weathering of olivine-rich ultramafic rocks such as dunite, peridotite and komatiite and their serpentinized derivatives, serpentinite which consist largely of the magnesium silicate serpentine and contains approx. 0.3% nickel. This initial nickel content is strongly enriched in the course of lateritization.
• Nickel production has been historically based on sulphide resources and high grade saprolitic laterites. • Based on currently known resources, future production will increasingly have to come from low grade limonitic and saprolitic laterites with <1.5% Ni. • Commercially applied processes for low grade laterites
LME Nickel Contract specifications. Every metal traded on the LME must conform to strict specifications regarding quality, lot size and shape. Each LME tradeable contract is likewise governed by rules covering (but not limited to) prompt dates, settlement terms, traded and cleared currencies and minimum tick size.
Nickel laterite ores account for over 60% of global nickel supply. They are the product of intensive deep weathering of serpentinites under humid tropical conditions. Nickel is concentrated to over 1.0 wt% and is hosted in a variety of secondary oxides, hydrous Mg silicates and smectites.
Ni-Co Laterite Deposits of the World—Database and Grade and Tonnage Models By Vladimir I. Berger, Donald A. Singer, James D. Bliss, and Barry C. Moring. Introduction. Nickel is an important metal in modern metallurgy with major uses in stainless steel (about 45 percent) and nickel-based alloys (about 39 percent). Since 1950, world Ni output
Nickel laterite ores account for over 60% of global nickel supply. They are the product of intensive deep weathering of serpentinites under humid tropical conditions.
Nickel-cobalt (Ni-Co) laterite deposits are supergene enrichments of Ni±Co that form from intense chemical and mechanical weathering of ultramafic parent rocks. These regolith deposits typically
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