A process by which low-grade ores, slags, or residues from retorts may be
treated either for the recovery of zinc alone or for the recovery of zinc,
lead, and tin. It employs a rotary kiln, and the zinc-bearing material mixed
with fine coal is fed into the kiln and heated, so that the zinc is vaporized
and converted to oxide fume. Newton, 1
Source:
Dictionary of Mining, Mineral, and Related Terms
