Patent ID: 7608128
Filing Date: 2009-10-27
Classification: C21B,C22B,Y02P

Abstract:
1. A direct reduction process for a metalliferous material comprising: supplying a solid carbonaceous material, an oxygen-containing gas and a fluidizing gas to a first vessel for maintaining a fluidized bed in the first vessel and generating heat by reactions between the oxygen-containing gas and the solid carbonaceous material and any other oxidizable solids and gases in the fluidized bed and discharging a hot off-gas stream containing entrained solids, and supplying the metalliferous material and a fluidizing gas to a second vessel for maintaining a fluidized bed in the second vessel and supplying the hot off-gas stream containing entrained solids from the first vessel to the fluidized bed in the second vessel and at least partially reducing the metalliferous feed material in the solid state in the fluidized bed and discharging a product stream of at least partially reduced metalliferous material and an off-gas stream containing entrained solids, and wherein the oxygen-containing gas is supplied into the first vessel so that there is a downward flow of the gas in the first vessel.