Sulphur and Ash Reduction in Coal by High Gradient Magnetic Separation

Abstract

Laboratory tests had been carried out to clean pulverized coal in air streams using a process known as high gradient magnetic separation. Encouraging preliminary separability results were obtained for a British coal; most or the pyrites and greater than 70% of the ash were removed from the pulverized coal. The effects of some operating parameters such as gas velocity and matrix loading on coal cleanability were reported.