REDUCTION RATIOS

摘要

One of the most versa-tile size reduction ma-chines and one of the hardest working is the cage mill. There are several kinds of cage mills, but their similarities are more numerous than their differences. They are all internally fed impactors that can crush, grind or pulverize many different materials to specified degrees of fineness. By 1900, Nathan Stedman had built more than 100 cage mills designed exclusively to crush coal. Other applications were discovered soon after that time, leading to the increased use of cage mills for crushing chemicals, clay, fertilizer and other products. Multiple-row cage mills - two-, four- and six-row - were common.