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 arsenical ores






The extraction of nickel from arsenical ores - e.g., niccolite or kupfernickel, chloanthite, and nickel glance. Arsenical ores are now very little worked. The ores, freed from gangue, were first roasted to remove some of the arsenic. The iron can be nearly all oxidized and slagged before the nickel arsenide is attacked. This furnishes a crude speiss. The crude speiss is again roasted and enriched by a second fusion to furnish an enriched speiss. The operations are here analogous to those employed in the preparation of the coarse and enriched mattes in working with sulphide ores, only now, in the roasting, stable arsenates are formed. The roasted charge is therefore mixed with carbon strongly heated so as to reduce the arsenate to arsenide. The arsenic can also be removed by heating the nickel arsenide with nitre and soda whereby the nickel furnishes nickel oxide, and the arsenic a soluble arsenate which can be removed by leaching with water. The arsenic can also be removed as volatile chloride by the chloridizing roast with common salt. The nickel oxide can then be reduced in the usual manner.


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