The Effect of Grinding Media Size on Grinding Kinetics of Cement Clinker in Ball Mill

【Author】

Haiyan Qian;Bolin Zhang;Jinshi Chen;

【Abstract】

<正>To investigate the effects of grinding media size on the grinding kinetics of cement clinker in a ball mill,the grinding effects withφ20mm,φ30mm andφ40mm balls on -1.70+1.18mm monosize fractions cement clinker were studied in a laboratory scale ball mill.The specific rates of breakage,primary breakage distribution Junction and particle size distribution were compared for different diameter balls.The result showed that cement clinker obeys first-order breakage kinetics of different size grinding media.The specific rates of breakage Si increases as grinding media size.The grinding media size has some effect on the primary breakage distribution parameters.It is found that bigger balls(φp40mm andφ30mm) produce more fines at shorter grinding periods(I-16minutes). On the other hand for longer grinding time(φ40mm,φ30mm andφ20mm balls produce similar fineness. Originality The effects of grinding media size on the specific rates of breakage and primary breakage distribution function of clinker have been studied firstly.The result showed cement clinker obeys first-order breakage kinetics of different grinding media.The specific rates of breakage Si increases as grinding media size.

【Keywords】

grinding kinetics;;grinding media size;;specific rate of breakage;;primary breakage distribution function;;particle size distribution

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