钢球磨煤机制粉系统运行优化的试验研究

Operation Optimization of a Ball Mill Pulverizing System

针对钢球磨煤机的制粉系统,在实验室条件下,通过调整载煤量、钢球装载量及煤的磨制时间,确定了MS-500试验用磨煤机的最佳载煤量和最佳钢球装载量.结果表明:随着载煤量的增加,磨煤机出力、驱动功率均呈现先增大后减小的趋势;最佳载煤量/钢球量随钢球量的增加逐渐降低;在最佳载煤量下,磨煤单耗随钢球量的增加先减小后增大.此外,对磨煤机理进行分析,确定了冲击、破碎、研磨在时间上的先后性,提出了磨煤机筒体分三段式的优化构想.

Experiments were conducted under laboratory conditions for an MS-500 ball mill pulverizing system,through which optimal coal feed rate and ball loading quantity were respectively determined by adjusting the coal load,ball load and milling duration.Results show that both the mill output and its driving power rise first and drop later on with the growth of coal load;optimal proportion of coal to ball load drops gradually with rising ball load;under the condition of an optimal coal load,unit mill consumption first drops and then rises with growing quantity of ball load.By analyzing the milling mechanism so as to find the sequence of striking,crushing and milling action,an optimized idea is presented,in which the consideration of dividing the milling shell liner into 3 segments included.