High Gradient Magnetic Gas Filtration

Highly successful tests have shown that high gradient magnetic filtration can provide a viable alternative to conventional filtration to curb the amount of stack gas particulate emissions from iron-based industries, especially steelmaking processes. Using basic oxygen furnace dust in our work at Sheffield University, filtration efficiencies of 99% and greater were obtained for submicron particles down to an optically measurable 0.24 μm diameter; for particles of 1 μm and above, 100% filtration efficiency was achieved. High gas throughput, together with low pressure losses, low applied magnetic fields and good filter matrix loadability all further indicate the potential commercial practicality of HGMF in the steelmaking industry.