L. A. Khan

• Coal recovery from mine wastes of the historic longwall mining district of north-central Illinois
• Economics of secondary recovery of coal
• Effects of some anionic flocculants and their concentrations on settling rates of coal and underclay slurries
• Evaluating the feasibility of secondary recovery of coal from mine wastes
• Froth flotation of coal fines from Illinois coal mine effluent
• Microcomputer interfacing with sensors in communication research
• Recovery of coal from effluent of two operating mines
• Sampling methods for feed and solid products from coal combustion systems