小鱼沟选煤厂煤质特点及改扩建措施

Coal characteristics and extension plan of Xiaoyugou coal preparation plant

为提高小鱼沟选煤厂原煤处理能力,对原煤进行筛分试验、浮沉试验及产品数质量对比,以原煤性质为基础,确定了系统主要设备选型,并提出具体改扩建措施。结果表明,占原煤质量分数65%的末原煤由两产品重介质旋流器分选,末矸石产率为40%。通过改造原有主厂房部分设备,扩建主厂房并增加末煤分选系统,扩建压滤车间和浓缩车间等措施,选煤厂的原煤处理能力由3.80 Mt/a提升至5.00 Mt/a,系统对原煤中块煤、末煤比例适应性更强,块煤、末煤介质系统完全独立,可以分别设定分选密度,产品灰分和发热量调节更加灵活、可靠。块精煤、末精煤产品水分降低了1%,入选原煤介质损耗量降低了0.20 kg/t,降低了生产成本。

In order to improve handing capacity of Xiaoyugou coal preparation plant,taking raw coal as research objects,the screen analysis and float-and-sink analysis were conducted,then the quality and quantity of products were compared. The main equipments and specific extension plan were determined based on the raw coal properties. The results showed that,the slack coal which accounted for 65% among raw coal was separated by two-product dense medium cyclone. The yield of tailings was 40%. The handing capacity of Xiaoyugou coal preparation plant was increased from 3. 80 Mt / a to 5. 00 Mt / a by extending the main separation building,pressure filtration and concentration building,transforming some devices in the main separation building,adding slack coal separation system. After transformation,the system was adaptable to a wide range of lump coal and slack coal. The medium system for lump coal and slack coal were completely independent,so the separation density,ash of products and calorific value of products could be controlled flexibly. The moisture of lump clean coal and slack clean coal decreased by 1%,the medium consumption reduced by 0. 20 kg / t.