This study investigates the influence of some chemical additives such as methanol, ethanol, sodium oleat, chloroform and sodium hexametaphosphate (SHMP) on the dry fine grinding of calcite (X50= 33 µm) using a stirred media mill. The experiments were carried out by a batch operation, and the change in colour properties (Ry, whiteness and yellowness) of calcite powder. The results showed that th...

Enhancing the accuracy of an approximate cost estimate is a critical issue since the estimate ordinarily predicts the total cost of a project with insufficient project information. In order to facilitate the approximate cost estimate process, this paper proposes a computer-based integrated system that enables the flexibility to varying amount and accuracy of available information, higher accura...

To improve the working performance of hammer mill, cutting-edge and oblique were designed in this study. The advantages new hammers theoretically analyzed. grinding process corn grain with different was studied by discrete element method (DEM) experiments. Discrete simulation results showed that under same rotor speed conditions, had highest bond-breaking efficiency model. could reduce incident...