Study and Sizing of Centrifugal Pumps: The Case of SOMAÏR's 2013 Pumps, North Niger

The present study concerns the design and sizing of centrifugal pumps, the case of the 2013 pumps used at the Société des Mines de l'AÏR. The Société des Mines de l'Aïr (Somaïr), characterized by extensive modernization and industrialization, has increasingly new needs. The study began by analyzing the existing situation for each circuit. We then proceeded to size the pumps, choosing the type of pump and the material best suited to each type of circuit, taking into account the characteristics of the fluid being pumped. The suction and discharge head losses are 0.02434 m and 0.038 m respectively. The pump's hydraulic power is 10.806 kW. In view of the 18.5 kW mechanical power required for the drive motor, we have chosen 13.51 kW in order to keep within a reasonable margin. Thus, the pump has an absorbed power of 13.51 kW with an efficiency of 80%. For the P3 2225 pump, the mechanical power is 2.4 kW, the HMT is 50 m, and the flow rate, speed and efficiency are 10 m3 /h, 2900 rpm and 60% respectively. For the P4 5154 pumps in the discharge circuit, the mechanical power of the pump is 6.42 KW, the HMT is 30 m and the flow, speed and efficiency are 50 m3 /h, 2900 rpm and 68% respectively.