Abstract
Comminution plays a major role in many processes where raw materials are converted into intermediate or final products. The efficiency of comminution is very low, and research and development to save the comminution energy have been performed. Then, it is necessary to estimate correctly the comminution energy. Work Index proposed by Bond is an important factor in designing comminution processes and has been widely used. Work Index is measured by a ball mill grinding and the measurement procedure is closely defined in JIS (Japanese Industrial Standard) but the optimum grinding condition is varied with samples. Then, it would be possible to overestimate the comminution energy to get products. In this paper, the above was studied by grinding conditions for the measurement of a Corresponding Work Index which was proportional to the Work Index. The feed size, the mass of feed and the mass of ball were investigated as the grinding conditions when the rotational speed of mill and the ball diameter were constant. The samples used were silica glass, quartz, feldspar, limestone and gypsum. The result indicated that the comminution energy based on the Bond's theory might be larger than the energy required to get fine particles.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
