Grinding-aid effect on the colour properties (Ry, whiteness and yellowness) of calcite in stirred media milling
عنوان مقاله: Grinding-aid effect on the colour properties (Ry, whiteness and yellowness) of calcite in stirred media milling
شناسه ملی مقاله: JR_JPST-2-1_003
منتشر شده در شماره 1 دوره 2 فصل Winter در سال 1395
شناسه ملی مقاله: JR_JPST-2-1_003
منتشر شده در شماره 1 دوره 2 فصل Winter در سال 1395
مشخصات نویسندگان مقاله:
Oner Yusuf Toraman - Mining Engineering Department, Faculty of Engineering, Omer Halisdemir University, ۵۱۲۴۰ Nigde, Turkey
خلاصه مقاله:
Oner Yusuf Toraman - Mining Engineering Department, Faculty of Engineering, Omer Halisdemir University, ۵۱۲۴۰ Nigde, Turkey
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 hexametaphosphate 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.
کلمات کلیدی: Stirred media mill,Fine grinding,Calcite,Grinding aid,Colour properties,,
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/706893/