Abstract
Dusts can be defined as fine coal particles of size range 1–400μm. Dust control has the dual purpose of cleaning the air and recovery of coal. It also helps protect people’s health. The sources of dust generation have been identified. Dust prevention and dust collection are the two basic approaches to dust control. The common dust prevention solutions comprise of sprays, surfactants and foams, designed transfer chutes, and engineered transfer chutes. The right approach depends upon the specific conditions. There are various types of dust collectors applicable to particle size and air velocity. The selection and design criteria of dust collectors have been elaborated. The efficiency of dust collectors and the effects of controlling factors are explained. Four types of collectors have been broadly described – gravitational settling chambers, cyclones, fabric filters, and electrostatic precipitators. Their merits and demerits are highlighted.
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