Çimento Öğütme Devrelerinde Farklı Akış Kollarında İnce Öğütmenin Kullanılabilirliğinin İncelenmesi
Özet
When the whole mining operation is considered, the grinding process is known as the energy intense process. In this context, its optimization is of crucial importance for the economy of the plant and is undertaken by considering the fineness of the feed and the products together with the energy utilization. Until now, different grinding technologies and flowsheets have been developed that lead to improvement in the energy efficiency.
This study aimed at evaluating the possibilities of the use of fine grinding technique in cement grinding circuit by taking the quality issues and energy consumptions into account. Within the scope of this project, separator feed, separator reject, filter product and final product samples were collected from a cement grinding circuit having conventional flow sheets and their quality developments were investigated. In addition, the ground separator feed and reject samples were mixed with the cement final product at varied proportions and their effects on the quality of cement were examined. Thus, the effects of fine grinding technology on this stream were tried to be assessed.
Studies at Bursa Cement Mill 1 showed that mixing of ground separator reject and final product 28-day strength value from 54.7 MPa (reference) to 55.5 MPa hence grinding technology could be used in that stream. Simulations regarding to energy utilization proved that in case the fine grinding technique was used on separator feed and reject streams, energy consumption would decrease by 12.93% and 3.63% respectively. For Bursa Cement Mill 4, it was found that the 28-day strength was increased from 51.4 MPa to 52.8 MPa with similar application. The energy saving in this case was calculated as 6.42% for the separator reject application.
As a result of the studies, it was determined that the use of fine grinding technology had positive effects on the circuit.
