摘要
通过对弛张筛的优势分析,发现其具有筛孔不易堵塞,筛分效率高,处理量大,动负荷小,功耗少,噪音低等优点。全入选选煤厂主要存在煤泥水处理系统负荷大、末煤系统稳定性低、脱介效果差、末原煤洗选后提质效果不明显、煤泥黏度大等问题,因此有必要对郭家湾选煤厂洗选工艺进行再优化。根据选煤厂煤质特点,结合弛张筛优势,提出4种洗选方案:全入选、末煤50%入选、6 mm弛张筛脱粉、3 mm弛张筛脱粉,并对各方案的产品平衡情况进行分析。最后对比了4种方案的产品产率和经济效益,说明末煤6 mm弛张筛深度分级脱粉洗选可减少原煤入选量,降低加工成本;降低煤泥产率,提高洗选系统稳定性;降低项目投资,实现收益最大化。因此,确定采用6 mm弛张筛脱粉方案对郭家湾选煤厂洗选工艺进行再优化。
The flip-flow screen has a series of merits such as high screening efficiency and handing capacity, low power consumption, noise and dynamic load, its screen aperture is not easy to jam. There were lots of problems in Guojiawan coal preparation plant, the slime water processing system was overloaded, the slack coal processing system was unstable, the upgrading effects wash ＂t obvious, the viscosity of slime was high. Based on the coal qualities ,provide four kinds of preparation methods, which are complete washing, 50 percent slack coal washing, fines removal with 6 mm flip-flow screen, fines removal with 3 mm flip-flow screen. The analysis of productivity and economic benefits of these four methods show that, the third method can decrease the raw coal feed, processing cost and slime productivity, increase the system stability. So choose the third method to optimize Guojiawan coal preparation plant.
出处
《洁净煤技术》
CAS
2013年第4期12-17,共6页
Clean Coal Technology
关键词
工艺优化
弛张筛
深度分级
脱粉
末煤洗选
产品平衡
process optimization
flip-flow screen
subdivide
fines removal
slack coal washing
product structure
