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Table 6

Chemical analysis results of laterite ore calcined at different temperatures after being reduced under optimal reduction parameters and with additives of various amounts (unit: mass %).

Calcining Temp. (K) Additive content (%) TNi Ni TFe FeO Fe Ni Grade Ni recovery
673 0 1.43 1.29 47.9 46.0 0.36 > 30 90.2
  5 1.45 1.36 48.7 49.9 0.60 > 30 93.8
  10 1.44 1.40 48.1 54.3 1.32 21.6 97.2
873 0 1.44 1.05 47.9 46.2 0.92 > 30 72.9
  5 1.45 1.37 48.9 52.7 2.69 > 30 94.5
  10 1.46 1.50 48.7 52.0 7.39 16.5 100
1173 0 1.26 0.99 47.7 52.6 3.49 22.1 78.6
  5 1.20 1.26 48.5 53.5 4.0 23.1 100
  10 1.29 1.48 47.7 45.0 6.14 17.4 100

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