Abstarct: Flotation is one of the most important common methods of mineral makeup, Which is established baxsed on the physicochemical properties of a solid surface for ۲۰ to ۲۰۰ mesh particle in a fluid and air flow to create the perfect bubble. Despite the many advances made in the processing of valuable minerals, flotation is still used as one of the most effective methods for the preparation of primary concentrates. Flotation is usually performed in the presence of the collector and frother. In coal flotation, oil collector are used to improve the recovery of coal particles. According to the high cost of chemicals, if feasible to remove or consume fewer doses of these reagents in flotation operations, operational costs will be reduced. In this thesis, the focus is on investigating the effect of mineral salts on the behavior of coal flotation. According to recent studies on the effect of inorganic salts on the flotation of various minerals, the effect of salts and the interaction of salts (two types of salt) on the flotation of coal in order to improve coal recovery and reduce chemical use were examined. In addition, the kinetics of coal flotation in the presence of different salts were performed and compared with conventional flotation. The results of these experiments showed that the presence of inorganic salts increases the efficiency of coal flotation and decreases the dose of chemicals. Also the most recovery for nitrate salts were ۹۴%, medium recovery for chloride salts were ۹۳.۸۴% and sodium acetate had the lowest recovery were ۴۴%. Nitrate and chloride salts also prevent bubble coalescence, but sodium acetate salt does not affect the bubble coalescence. The flotation kinetics of coal in the presence of a saline solution is is higher than conventional flotation.