Emprical relationships of HGI in terms of proximate analysis of coal

Abstract

In this study empirical relationship of HGI (Hard Groove Grindability Index) was established in terms of proximate analysis of coal. HGI is important parameter at mining applications such as excavation, crushing, grinding, dust generation. HGI has long been researched and empirical equations evaluating coal proximate analysis data has been proposed. Grindability of coal should be in consideration for power plant operators as well since milling requires high energy and no frequent maintenance is desired for mills. Determination of HGI experimentally takes time and studies address on the estimation of them in an easier way. Proximate analysis of coal is easily evaluated and coals are classified with respect to their proximate analysis results. That is why, with the help of proximate analysis data, method can be developed to estimate HGI..In this study user friendly methods were proposed to predict HGI and this could be helpful tool for the initial estimates. This user friendly method was proposed and applied on the data taken from previous studies. Proposed estimation method of HGI are in good agreement with the previous studies’ results.