The Burning of Slurried Elemental Sulphur in a Fluidized Bed Roaster
A considerable part of the sulphuric acid requirements of the Aluminum Company of Canada's Arvida smelter comes from the burning of 180-200 tons per day of zinc sulphide concentrates in a 22-ft.-diameter fluidized bed roaster. The plant and its operation were fully described in a publication that appeared about ten years ago ( 1 ). A simplified flow sheet of the roasting and gas-cleaning sections of the plant is given in Figure 1. The wet zinc sulphide concentrates a re un loaded into a •pug mixer, by means of a Payloader, and mixed with water in a mixing tank to make a slurry of 80 per cent solids. The slurry is transferred to a feed tank and then introduced into the roaster at a point four feet above the constriction plate, which is the height of the settled bed of zinc calcines.
Aluminum Company of Canada, Slurried Elemental Sulphur, slurry, sulphuric acid, zinc, Calcine, Operation, Plants, Roasters, Slurry, sulphur, Water, Waters, zinc