This paper describes the initial phases of an evaluation of high gradient magnetic separation (HGMS) as a potential method of fine particle collection from industrial stack gases. HGMS is a relatively new separation technique that has been shown to be capable of removing small, weakly magnetic particles from liquids at high process rates. The design and operation of a bench-scale apparatus is described, and preliminary experimental results are discussed. HGMS is found to be capable of high efficiency collection of submicron particulate from a stream of redispersed basic oxygen furnace dust. Preliminary projections indicate that full-scale capital costs and power requirements would be reasonable.