In the Tabas coal preparation plant (SE Iran), -50 + 6 mm raw coal was treated in a 700 mm two-stage two-density Tri-Flo dynamic dense medium separator. In order to study the circuit performance and to evaluate the separator efficiency, 32 mm cubic density tracers were used in the range of 1.28-2.1 g/cm3 and under different operational conditions. The performance of Tri-Flo was evaluated in a r...

The article summarizes the arguments on minimizing uncertainty level caused by numerous unforeseen circumstances due to using operational flexibility increase companies' efficiency (example of small and medium enterprises in pharmaceutical sector Iran). research aims at investigating relationship between a company's performance examine impact environmental these relationships. This study was co...