Study on the Control of Industrial Dust from Alumina Production Process

Abstract

The dust from industrial process does harm to the human health, the equipments and environment. Based on the comparison between bag filter and electrostatic precipitator, bag filter was used to control the dust from the industrial process with the filter cloth of polypropylene fiber needled felt. During run time, the filtration rate should be less than 1.59m/min and the pressure of the draught fan should be 3100Pa with the wind speed in the range of 22m/s to 24m/s, which eliminated the dust formation. And the size of dust hood should be heightened and lengthened in order to decrease dust escape and the cone angle of the dust hood should be more than 60°. In additon, in order to prevent the blocking of the ash unloading device, the best angle of the ash discharging pipe should be 60°. The dust collection system run well for five years and the collection efficiency was more than 99.0%, which created the benefits of environment, economics and society.