smelting
  冶煉; 熔煉
  Smelt, v. t. [imp. & p. p. Smelted; p. pr. & vb. n. Smelting.]  Metal. To melt or fuse, as, ore, for the purpose of separating and refining the metal; hence, to reduce; to refine; to flux or scorify; as, to smelt tin.
  ◄ ►
  Smelt·ing, a. & n. from Smelt.
  Smelting furnace Metal., a furnace in which ores are smelted or reduced.
  ◄ ►