Concentration includes all the processes that will increase (upgrade) the iron content of an ore by removing impurities. Beneficiation, a slightly broader term, includes these processes as well as those that make an ore more usable by improving its physical properties (e.g. pelletising and sintering).
They occupy large spaces as may be seen from the aerial photograph of three large thickeners. They are normally positioned far away from the center of the plant and owing to the large flows they are fed by gravity to save pumping. Therefore their position for a given