保德选煤厂DMI筛网沉降离心机运行效果分析

 保德选煤厂北区新系统采用DMI筛网沉降离心机与安德里兹板框压滤机配合的方式处理煤泥水，本文在生产过程中浓缩机入料、浓缩机底流、筛网沉降离心机滤液采样数据的基础上进行分析，结合生产情况，对DMI筛网沉降离心机工作效果进行评价，结果显示，DMI筛网沉降离心机在入料浓度为354.6g/l时，滤液浓度为69.8g/l，固体回收率可达85.83%，-0.045mm粒度级细粒回收率达到82.79%。生产过程中，筛网产品松散，不聚团，水分较低，脱水效果较好。本文同样总结了筛网沉降离心机在保德选煤厂北区使用中存在的问题，从工艺上提出三点可行性解决方案，用以改善保德选煤厂煤泥系统。

Analysis of the DMI screen-bowl centrifuge for fine coal de-watering at Bao-De Coal Preparation Plant

North Bao-De Plant combines DMI screen-bowl centrifuge with Andritz plate-and-frame filter press to de-watering fine coal. The article analyzes the performance of DMI screen-bowl sedimentation based on the date of density of the feed to the thickener, the underflow of thickener and the filtrate of DMI screen-bowl centrifuge, which indicates that when the feed concentration is 354.6g/l, the filtrate concentration is 69.8g/l, the recovery of coal is 85.83%, and especially the recovery of -0.045mm fine coal is 82.79%. In the production process, product of DMI loosening, no reunion, low moisture, has an excellent performance. The article concludes the shortcoming of this equipment in use also, put forward three solutions to solve, to improve the slime-water treatment system.