Microsilica dust in the ferrosilicon industry

CIM Bulletin, Vol. 82, No. 923, 1989

A.E. El-Nikhaily, M.A. El Zeky and M.A. Shahin, Suez Canal University, Suez, Egypt

Possible mechanisms of microsilica dust formation and factors affecting its quantity have been discussed. General mathematical models to predict the dust quantity based on electrical and coke consumptions, and flue gas temperature as functions of silicon recovery in the process and silicon content of the alloy have been established. It has also been shown that the flue gas temperature can be used as an additional process control parameter. Comments are made on the effect of the dust formation on the whole process economics and it is pointed out that the formed microsilica dust is a valuable by-product and not an industrial waste.
Mots Clés: Metallurgy, Silica dust, Ferrosilicon industry, Dust formation, Ferroalloys, Electric arc furnace