Chemical elements
  Nickel
    History
    Occurrence
    Isotopes
    Energy
    Production
      Extraction
      Ore Roasting
      Nickel Ore Smelting
      Nickel Enriching
      Crude nickel
      Arsenical Ores
      Garnierite
      Nickel from Metallurgical Products
      Wet Extraction
      Electrolytic Extraction
      Impurities
      Purification
    Preparation
    Application
    Catalyst
    Physical Properties
    Compounds
    PDB 1a5n-1g2a
    PDB 1g3v-1mn0
    PDB 1mro-1s9b
    PDB 1scr-1xmk
    PDB 1xu1-2cg5
    PDB 2cqz-2jih
    PDB 2jk8-2v4b
    PDB 2vbq-3c2q
    PDB 3c6c-3h85
    PDB 3hdp-3kvb
    PDB 3l1m-3o00
    PDB 3o01-4ubp
    PDB 8icl-9ant

The extraction of nickel from garnierite






Many analyses of the New Caledonian ore - garnierite - have been reported. The composition is Usually taken to lie between the following limits:

NiOSiO2Fe2O3Al2O3HgOH2O
Garnierite %9 to 1741 to 465 to 141 to 76 to 98 to 16


For a time, the ore was reduced with suitable fluxes - fluorspar, cryolite, soda, manganese ore - and powdered coal or coke, in a blast-furnace, and the resulting ferro-nickel obtained approximated:

NiTeSiSC
Ferro-nickel.68.2027.821.621.022.50 per cent


The process was not satisfactory. It was found better to smelt the ore in a blastfurnace with sulphur so as to form a regulus or matte. The sulphur was added in the form of alkali waste (calcium sulphite), or as gypsum, or iron pyrites. Suitable fluxes are added to form a slag. The mixture is briquetted and smelted. The resulting regulus or matte contains up to 50 per cent, of nickel. The regulus is then enriched either by roasting and melting, or in a converter as in the case of the mattes from the sulphide ores. The enriched matte is then roasted for oxide and reduced. The ore contains no copper, so that the resulting nickel oxide can be directly reduced to nickel. The extraction of nickel from garnierite in Brazil was discussed by E. de Oliviera, J. L. Fohlen, A. Guerreiro, M. Ballay, E. Reitler, and H. E. de Aranjo; and from silicate ores, by B. Bogitch, T. Tatebe, and J. Hissink.


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