Bakır Cürufu Öğütme Devresinin Bilgisayar Destekli Performans Değerlendirmesi ve Optimizasyonu

Abstract

In this study, modelling and simulation studies were performed, with the samples taken from copper slag grinding circuit. In the grinding circuit, there are two different hydrocyclone groups working together with the autogenous mill and the pebble mill as closed circuits. JK Simmet v 6.01 software was used for mass balancing studies in grinding circuit. Performance of the grinding circuit was obtained in survey conditions. Autogeneous and pebble mills were modeled in the next phase Leung and variable rates AG / SAG models were used for the autogenous mill and these two models were compared in terms of estimation properties. Also, pebble mill was modeled by perfect mixing ball mill model. After modelling studies, base simulation condition was established. Fresh feed capacity was determined as 38.86 tons/hour for base simulation condition. Improvements to increase fresh feed capacity were grouped under two headings as investment free and investment requiring alternatives. The capacity of grinding circuit shows an increase of about 12 % compared to the base simulation condition when the recomended fresh feed particle size distribution is used and hydrocyclones are operated more efficiently. In case of hydrocyclones are operating more efficiently with the suggested particle size distribution, a considerable increase in the circuit capacity is achieved by adding a cone crusher at the discharge of the autogenous mill for crushing of coarse pebbles. Finally, hydrocyclones have been replaced with high frequency wet screens that is used for fine screening purposes. As a result of all these changes, the fresh feed tonnage is increased by % 31 in compared to the base simulation condition.