1. Hise , E.C. , Wechsler , I. , and Douiin , J.M. , 1973 . Separation of Dry Crushed Coals by High-Gradient Magnetic Separation , Oak Rtdge National Laboratory , ORNL-5571 .
2. Hise , E.C. , Wechsler , I. , and Doulin , J.M. , 1981 . THE CONTINUOUS SEPARATION OF DRY CRUSHED COAL AT ONE TON PER HOUR BY HIGH-GRADIENT MAGNETIC SEPARATION , OAK RIDGE NATIONAL LABORATORY , ORNL-5763 .
3. Assessment of sulfur and ash removal from coals by magnetic separation