天津市硅酸盐制品厂使用的粉煤灰,因为受电厂储灰坑面积逐年缩小的影响,采细灰很困难,因而造成粉煤灰逐年变粗的不利状况。1984年上半年用的灰有时粗达40%(4900孔/厘米~2筛余量%)以上,平均细度32～38%。该厂生产的陶粒,粉煤灰掺量为80%,成球性能受粉煤灰物理性能变化影响最大,主要是含水率和细度变化。用φ4.2米成球盘造粒 The fly ash used in the Tianjin Silicate Products Factory was affected by the annual shrinkage of the ash storage area of ​​the power plant. It was very difficult to pick up the fine ash. As a result, the fly ash became increasingly unfavorable year after year. The ash used in the first half of 1984 was sometimes as thick as 40% (4900 holes/cm to 2% of sieve residue) and the average fineness was 32 to 38%. The ceramsite and fly ash content of the plant is 80%. The balling performance is most affected by changes in the physical properties of the fly ash, mainly changes in water content and fineness. Pelletizing with φ4.2m ball