18th International Mining Congress and Exhibition of Turkey-IMCET 2003, Ankara, Turkey, 10 - 13 June 2003, vol.1, no.1, pp.425-429
Experimental investigations to determine the surface roughness of calcite mineral ground in ball, rod and autogenous mills by BET (Brunauer-Emmett-Teller) and Surtronic 3+ techniques are presented. The surface roughness values of particles determined by the BET technique were stated in terms of the RBET values by calculating from the measured BET surface area values and varied between 15.98 and 19.98. The surface roughness values of particles in pelleted forms determined by Surtronic 3+ direct measurement technique were also stated in terms of the Ra values and varied between 2.90 and 3.54 μm. Considering the surface roughness values of calcite mineral ground in different mills determined by both techniques, the lower roughness values were observed in the autogenously ground particles while rod mill products had higher surface roughness values. Finally, some correlations were made between the calculated surface roughness (RB.E.T.) and measured surface roughness (Ra) values, in which the Ra values increase with increasing RBET values. The empirical relationship was found as RBET= 6.24 Ra - 2.16.