锦界选煤厂降低介耗的实践

Practice to reduce magnetite consumption in Jinjie Coal Preparation Plant

锦界选煤厂投运初期,介耗高达0.6 kg/t原煤,其主要原因有启车前介质循环所需路径长、时间长,分流装置存在缺陷,固定筛预脱水效果差等;通过增加介质小循环工艺、改造分流装置和固定筛等措施,选煤厂介耗降低至0.39 kg/t原煤。

In the early stage of operation,the magnetite consumption was up to 0. 6 kg per ton of raw coal. The main reasons are that the long pipes and the long time for medium even circulation at the start,the shortcoming of the bleed units and the poor dewatering effect of the fixed screens,and so on. The magnetite consumption is down to 0. 39 kg per ton of raw coal through adding a small circulation process of medium,modifying the bleed units and the fixed screens.