HYDROCYCLONE INSTALLATION FOR BLAST FURNACE SLUDGE TREATMENT
Stein Callenfels JE van (Danieli Corus)
Blast Furnaces produce significant amounts of dust in the top gas.This dust could be dumped, but it if far more attractive to recycle this dust through the sinter plant back into the blast furnace.Some of this dust, specifically the fine fractions contain 0.4 %~2 % zinc and various concentrations of other heavy metals. The zinc originates from the iron ore, but also from various other recycled iron bearing waste streams in the steel plant, some of them originating from galvanized scrap. Recycling of most heavy metal fractions and specifically zinc is undesirable for the BF process, as it will lead to accumulations of zinc in the plant zinc balance.A hydro cyclone installation has been developed in Corus IJmuiden to separate the coarse and fine fractions of BF dust, to be able to achieve the most economical balance between the maximum zinc input in the BF, the recovery of iron bearing materials and the dumping of zinc rich dust streams.
【CateGory Index】： TF321