It wasn’t until THE MAGNETIC BENEFICIATION of COAL 3 in the early seventies that technical and commercial viability were demonstrated. It is not easy to treat complex, intimately mixed substances like coal in order to extract one part. The separator is supplied with non-pyritic and organic mineral-free feed. It also contains magnetally polarizable, non-pyritic particles of mineral matter and inorganic sulfur. These can be captured at the capture points in the magnetic separator. It also contains middlings, which are particles that contain both organic coal and unliberated paraamagnetic inorganic material. The separator system can trap some of these middlings on the matrix. This causes a significant fraction of the organic coal to be included within the Strong Bar Magnets magnetic fraction. It also reduces the thermal yield of system products. The magnetic benefication is a process that demineralizes coal efficiently while retaining as little carbonaceous material as possible and maintains a high throughput. This goal has seen significant progress over the past decade. This review will discuss the latest developments and the issues they raise. COAL PHOTOLOGY COAL CONSTITIIENTS Coal Petrology Coal is a complex mix of plant-derived organic remains and inorganic minerals. The combustible component, called le carbon based, must be more than 50% by weight to qualify as coal strata. A’maceral’ is the basic component of coal. There are three types: vitrinite (exinite), inertinite (inertinite), and exinite (vitrinite). Vitrinite, which is the most important macroeral, is derived from a variety of cellular material. Exinite is a mixture of macerals from spores and cuticles as well as resin 4 S.E. MALE oun 0 0 “- THE MAGNNETIC BENEFIT OF COAL 5 and alga. Inertinite is the final maceral group is stired woth a strong bar magnet. It is high in carbon, low in hydrogen, and is made from material similar to vitrinite but has undergone greater oxidation during coalification. These macerals are components of a Strong Magnet . They form various proportions, which are the basic types of coal. Vitritie, for example, is found only in bituminous and has only vitrinite or inertihire. The complete nomenclature for coal petrology is found in Stach3. A specific coal stratum can be classified based on the amount of fixed carbon (the carbon that remains after the coal has been heated at a certain temperature). The rank of the coal is determined by the amount of fixed carbon. Every coal rank is made from different microlithotypes.