First fluo-solid Roaster in India-design and Operation

THE fluo-solid roaster is a modern device which has
passed on to the hands of metallurgists from the oil industry where it was used for the first time by
Houndry in 1936, for catalytic cracking of petroleum
and since then it has been improved and perfected.

It is now in common application for sulphide roasting recover gas for acid manufacture and
calcines from which metal constituents are extracted.
It can also he used for partial oxidation and sulph- atation roasting of concentrates and matte to render
them suitable for extractive treatments.
Fluid bed operation gives precise control of temperature without any hot spot and feed material to
air ratio. These facts are advantageously used in
sulphide roasting. The feed is intimately and rapidly
mixed with the air or gas introduced from the bottom
of the roaster.