Abstarct: Coal is the first fossil fuel that has been widely used as the primary source of energy. A 1% increase in coal ash content leads to a 4-5% increase in coke consumption and a 3-6% reduction in blast furnace efficiency. Therefore, there is always pressure on coal processing plants to supply coal with very low ash content. The preparation of coal for use as coke in the steel industry requires specialized mineral processing methods such as flotation. The flotation circuit of the Parvadeh Tabas Coal Washing Plant consists of six column flotation cells. Since approximately 15% of the plant's feed is processed in this section, improvements in these cells can have a significant impact on the overall plant efficiency and optimal separation. In this study, the parameters affecting the recovery of coal from the column flotation circuit of this plant were identified, analyzed, and evaluated, and the results were proposed as necessary control action plans. Diesel oil was chosen as the collector and methyl isobutyl carbinol (MIBC) as the frother, while the air rate and feed rate were selected as the influential parameters on column flotation. The experiments were designed using the Design-Expert software with central composite design (CCD) baxsed on response surface methodology (RSM). The collector and frother amounts were reported to have minimal effects on the responses. Increasing the air rate resulted in increased recovery and increased feed rate without affecting the recovery, accompanied by reduced ash content. The best result was achieved with 900 g/t collector, 340 g/t frother, 10594 mL/min air rate, and 8400 cm³/min feed rate, resulting in a column flotation operation with a recovery of 50.06%, ash concentrate of 11.61%, and gas holdup of 57.79%.