K-feldspar Stirred ball mill Narrow grain size Full factorial designThis study's aim is to investigate the wet and dry grindability of K-feldspar in the stirred ball mill. In the evaluation of the grinding process, a two-level and four-factor factorial design was applied and the effects of variables such as ball size, stirrer speed, grinding time, and interstitial filling ratio on the particle size distribution were investigated. Experiment results showed that K-feldspar can be efficiently milled using a stirred ball mill in a narrow particle size range (1-10 microns).

Grinding aids are commonly used in dry grinding to disperse the material in the system effectively and to improve grinding performance. Most of the time, different grinding aids with varying dosages are tested in laboratory conditions by trial and error. A simple methodology is required to compare the results of different grinding aids and dosages in batch milling. In this study, the utilization of the modelling approach in comparing the effect of grinding aid types and dosages were aimed. In order to achieve this, an experimental program has been conducted using a laboratory-scale batch stirred ball mill. The empirical model developed using the Farazdaghi-Harris model offers a new approach to determine the effect of grinding aids on grinding performance.