TY - JOUR ID - 355 TI - Grinding-aid effect on the colour properties (Ry, whiteness and yellowness) of calcite in stirred media milling JO - Journal of Particle Science and Technology JA - JPST LA - en SN - 2423-4087 AU - Toraman, Oner Yusuf AD - Mining Engineering Department, Faculty of Engineering, Omer Halisdemir University, 51240 Nigde, Turkey Y1 - 2016 PY - 2016 VL - 2 IS - 1 SP - 23 EP - 29 KW - Stirred media mill KW - fine grinding KW - calcite KW - grinding aid KW - colour properties DO - 10.22104/jpst.2016.355 N2 - 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 the chemical additives promote the fine grinding of calcite obtained with ethanol and methanol at a range of 0.5%. Ry and whiteness values of the ground calcite products very slightly increased from 94.10 and 87.04 to 94.76 and 87.75 respectively with grinding aid (ethanol) increased from 0% to 1%. Ry value was affected slightly adversely with sodium oleat, chloroform and SHMP indicating that the quality of colour of calcite deteriorates. It was also found that ΔRy increases with increasing amount of grinding aids from 0% to 0.5% for methanol and ethanol, indicating that the quality of colour of calcite heals. UR - https://jpst.irost.ir/article_355.html L1 - https://jpst.irost.ir/article_355_50b2e9dee67c1f2a5c927c0b88d820a7.pdf ER -