The Collaborative International Dictionary of English v.0.48:

Refinery \Re*fin"er*y\ (-?), n.; pl. Refineries (-?z). [Cf. F.
   raffinerie.]
   1. The building and apparatus for refining or purifying, esp.
      metals and sugar.
      [1913 Webster]

   2. A furnace in which cast iron is refined by the action of a
      blast on the molten metal.
      [1913 Webster]