The investigation of the floatability improvement of Yozgat Ayridam lignite using various collectors

In this study, the floatability of Yozgat Ayridam lignite using kerosene, kerosene + emulsifier and kerosene + emulsifier + surfactant has been investigated. It was determined that the combination of both kerosene + emulsifier and kerosene + emulsifier + surfactant were stable (except anionic), easily dispersible in water and formed very small oil droplets compared to the kerosene. It was concluded that all of the collectors except kerosene investigated in this study increased the floatability of Yozgat Ayridam lignite. However when the combustible recovery and flotation efficiency index were considered, the best results were obtained from the combination of both keresone + Acorga M5640 and keresone + Acorga M5640 + Flotigol CS (non-ionic). It was based on the high binding and spreading tendency of both collectors over the coal surface. The concentrates having a relatively low ash content were obtained with the kerosene + Acorga M5640 + Flotigol CS. Consequently, the floatability improvement of Yozgat Ayridam lignite was achieved by using the combination of both kerosene + emulsifier and kerosene + emulsifier + surfactant. (C) 2001 Elsevier Science Ltd. All rights reserved.