霍尔辛赫选煤厂产能升级改造

Capacity expansion and process renovation of Huoerxinhe coal preparation plant

通过分析霍尔辛赫选煤厂工艺流程，发现其主要存在-0．5mm煤泥未有效分选，粗煤泥脱水效率低，末煤系统生产能力不足等问题。分析了选煤厂煤泥性质，说明-0．25mm煤泥各密度级分布不均，呈现“中间大，两头小”的分布，主要集中在1．3～1．4，1．4～1．5，1．5～1．6kg／L三个密度级；当精煤灰分为10．50％时，浮选精煤理论产率为77．53％，理论分选密度为1．518kg／L，6±0．1含量为40％，可选性为难选。通过增加浮选环节，更换卧式离心脱水机和增加1套末煤系统对选煤厂进行扩能改造。改造后，-0．251mm煤泥实现有效分选，提高了精煤产率，减小了浓缩机处理量，降低了煤泥水系统压力；提高了粗煤泥脱水效率，满足了产能提升要求和精煤产品的水分要求；提高了末煤系统处理量，确保整个分选系统的平稳运行；选煤厂年增加销售收入22560万元。

The process flowsheet analysis of Huoerxinhe coal preparation show that, -0. 5 mm slime can＇t be separated effectively, the dehydration efficiency of coarse slime is low, the production capacity of slack coal is insufficient. The analysis of slime properties show that, the density fraction of -0. 25 mm slime is nonuniform, its distribution likes an olive. The three main density fraction are 1.3 kg/L to 1.4 kg/L, 1.4 kg/L to 1.5 kg/L and 1.5 kg/L to 1.6 kg/L. When the clean coal ash is 10.50 percent, the theory yield of flotation clean coal is 77.53 percent, the theory separation density is 1. 518 kg/L and the 6 ＋0. 1 content is 40 percent,the washability is difficult. Transform the coal preparation plant by adding the flotation process and slack coal processing system, replacing horizontal centrifugal dehydrator. After modification, - 0. 25 mm slime can be separated effectively, improve the clean coal yield, dehydration efficiency of coarse slime and handing capacity of slack coal system, decrease the handing capacity of thickener and slime water treatment system pressure, the coal preparation plant increases sales revenue 2. 256x10s yuan per year.