Innovations in Ferroalloy Baghouse System Design

Abstract

System design used by a typical ferroalloy producer is reviewed, with special emphasis on shaker cleaning of Nomex fabric in large structural baghouses. The use of air curtains at the furnace hoods, duct size venturi for flow measurement, and other techniques are described to permit evaluation of individual bags as well as complete compartments of bags. A unique hook-up of magnehelic gauges provides an instant assessment of the performance of each compartment to assist operators in achieving optimum operation. A critique on waste heat recovery, gas coolers, and induced draft fans on dirty gas service is included.