Teknik Not / Techical Note
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ABSTRACT
,QWKLVVWXG\GU\JULQGLQJRI$UPXWoXNFRDO G50 a1 mm) were investigated in a laboratory scale pin-type
vertical stirred mill. Grinding experiments were carried out with various diameter steel beads (6.5, 5.5, 4.5, 3.5 mm) at various grinding times (2.5, 5, 10, 20, 40, 60, 120, 240 s). Then, the results were plotted to see the effect of grinding time and bead size on the product fineness. The results showed that the SURGXFWV¶ PHGLDQ VL]H (d50) became finer (19, 18, 16, 11 Pm) as the media sizes decreases
(6.5, 5.5, 4.5, 3.5 mm) in 60 s grinding time. The efficiency of the stirred mill reduced dramatically after the 60 s grinding time and the fine particles were hardly ground after the 120 s grinding time.
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