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Chromite is used in refractories chiefly for its

  • A.its high plasticity in the green state
  • B.its transparency in the finished fired body
  • C.resistance to both acid and basic slags
  • D.its very low cost when compared with alumina

Answer: C

Being neutral in the acid-base scheme it can be placed between an acid and a basic lining without a reaction zone forming. Concerns over hexavalent chromium have reduced its use considerably. Neutral alternatives are chosen wherever they will serve.

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