THE EFFECT OF DRUM SPEED ON TIME AND GRAIN SIZE RESULTS FROM THE MILLING PROCESS

Grinding/crushing is a process of reducing the size in crushing plant to get desired size. The coal ball mill technique where collides with feed on tube wall, thus cracks will form which result smaller Limitation problem this study effect speed time and grain resulting from milling process, mass sample used 500 grams sizes that do not pass 10 mesh sieve, there are three types pulley variations, namely, pulleys 2 inch, 4 inch. , 20 inches as control using uniform balls diameter 4.58 cm