Pilot Plant Filtration of Zinc Suspension Roaster Gases Through Glass Fabric

CIM Bulletin, 1962

Current practice in the zinc concentrate roasting plant of The Consolidated Mining arid Smelting Company of Canada Limited, at Trail, B.C., involves passing the furnace effluent gases through an electrostatic precipitator for the recovery of dust. After removal of the dust, the gas is treated for recovery of sulphur dioxide by conversion into sulphuric acid ( 1). However. as roasting technique imp roved, and furnace productivity increased, the rated capacity of the precipitator was exceeded and it was necessary to consider various means of improving the dust recovery. A study of methods indicated that a baghouse, using silicone-treated g lass fabric, might be suitable for this particular application. Glass fabric was chosen because the temperature of the roaster effluent gases would range from 450°F to 500°F. and tempering air was undesirable to avoid dilution of the sulphur dioxide gas
Keywords: Capacity, dew point, Menardi Fabric, precipitator, sulphur dioxide, tensile strength, Dust, Filters, Glass, Materials, Operation, Roasters, Tensile strength, test, Tests