PELLETISING AN EVAPORITE MINERAL

摘要

A method for forming a pelletised evaporite material comprising: forming a material comprising a liquid and at least 50% by mass of an evaporite mineral powder; and processing the material using a pan pelletiser to form pellets comprising the material, the pelletiser being configured so that the mean well time of the material in the pan of the pelletiser is in the range from 60-120 seconds and the mean diameter of the pellets formed by the pelletiser is 1-8 mm. The pan pelletiser may have a base and a wall surrounding and upstanding from the base, the base of the pan being angled with respect to the horizontal and the pelletiser being configured to rotate the pan and thereby agglomerate material in the pan. The liquid may comprise water, or be a binder such as starch. Prior to being placed in the pan pelletiser the material may be in the form of granules having a mass average grain size below 1 mm.