预分解窑后结圈的形成原因及处理

Reasons and processing of clinker ring formation in precalciner kiln

预分解窑内形成后结圈,既影响窑的台时产量,又影响熟料的质量。文章主要论述了预分解窑形成后结圈的现象和原因,以及在生产实践中采取的应对措施:(1)控制进厂原材料的质量;(2)控制进厂原煤的质量;(3)稳定生料的质量;(4)改变熟料配料方案,采取高KH(0.91±0.02)和较低SM(2.65±0.1)的配料方案;(5)优化操作参数。结果表明,窑产量平均提高79 t/d,全年多产熟料2.6万t;熟料标准煤耗降低4.19 kg/t,全年节约标准煤6 400 t,二项累计创直接经济效益616万元。

Clinker ring formation in precalciner kiln has effeet on output of kiln and the quality of clinker. This paper mainly discusses the phenomenon and reasons of ring formation in preealciner kiln and takes measures in production practice： （1） Control the quality of raw materials;（2）Control the quality of raw coal ;（3） Stabilize the quality of raw materials;（4） change the ingredients of clinker and take ingredients scheme of high KH （0.91 ±0,02） and low SM （2.65±0.1）;（5） optimize operating parameters. The result shows that the kiln production increases an average of 79 t/d, produces 26 000 t more one year; Standard coal consumption of clinker reduces 4.19 kg/t, saving standard coal 6400 t/a.Both methods creates direct economic returns about 6.16 million yuan.