| 摘要 |
PROBLEM TO BE SOLVED: To provide a crushing method of coal capable of crushing coal to a target grain size by a simple method irrespective of a coal grain size before crushing.SOLUTION: In a certain brand of coal: coals having a plurality of different moisture contents are crushed in a crusher beforehand; parameters C/e, n in an equation are calculated on the basis of a crushing condition and a crushing result and using the equation exhibiting relationship between the crushing energy of coal and grain size distribution before and after crushing; and the relationships between the moisture content of coal and the parameters C/e, n are determined. When the certain brand of coal is crushed in the crusher: coal grain size (g) and moisture content (w) of coal before crushing are measured; the parameters C/e, n corresponding to the moisture content (w) on the basis of the relationship between the moisture content of coal and the parameters C/e, n are calculated; the load current value of the crusher from which target coal grain size (g) after crushing is obtained using the equation on the basis of the parameters C/e, n and the coal grain size (g) before crushing; and the current of the crusher is adjusted on the basis of the load current value.SELECTED DRAWING: Figure 1 |
