Abstarct: Flotation is one of the most important conventional processes for separating valuable minerals from waste material. Particle size plays a crucial role in this process, with current challenges arising from coarse and fine particles that lead to reduced recovery rates during flotation. Fine particles exhibit slower flotation kinetics and lower collision efficiency, compounding recovery issues. Additionally, gasoline, used as a co-collector for molybdenum flotation, presents a significant challenge by forming a biphasic system with water, thus diminishing the likelihood of molybdenum's contact with gasoline. Therefore, emulsification of gasoline, which promotes a single-phase system and produces finer gas bubbles, is critical to enhancing fine particle recovery. This thesis focuses on improving the recovery of copper and molybdenum through gasoline emulsification. Following sample preparation from the fine material storage of Concentration Plant 1 at Sar-Cheshmeh Copper Complex and subsequent comminution, the samples were analyzed chemically (XRF, XRD) and mineralogically. A total of 43 experiments were conducted using conventional flotation and 16 kinetic flotation tests employing various emulsification methods. The results indicated a 3.45% increase in copper recovery using emulsified gasoline with Tween20 in Concentration Plant 1, and a 3.93% increase in molybdenum recovery. Furthermore, the d80 of the particles floated with Tween20 decreased by 3.8 microns.