摘要
为了解决灵新选煤厂跳汰分选机分选精度不高,<13 mm粒级不能得到有效分选的问题,通过深入的研究发现,矸石中<30 mm矸石发热量在8.36~10.04 MJ/kg之间,浮沉实验<1.70 g/cm密度级含量平均在3.5%~6%之间,且对上浮物进行筛分分析发现主要粒级集中在<30 mm粒级中。通过简单的技术改造,将矸石中<30 mm的末矸部分筛分后掺入末煤,显著降低了灵新选煤厂矸石带煤率,降低了矸石排放量,并提高了末煤产量,取得了良好的经济效益和社会效益。
The challenges facing Lingxin Plant are low separation sharpness of jigging system and ineffective separation of the<13 mm size coal.Investigation indicates that the<30 mm refuse product has a calorific value of 8.36~10.04 MJ/kg with the content of the<1.70 g/cm density fractions of being 3.5%~6%on average,and as evidenced by screening analysis of the floats,the floats are mainly in the<30 mm size fractions.Through a simple technical transformation of screening and blending the<30 mm refuse into small coal product,there have been seen a noticeable drop of loss of clean coal in refuse,reduced refuse dumping rate and increased yield of cleaned small coal,bringing about a favorable social and economic result for the plant.
作者
宋双龙
SONG Shuanglong(Coal Preparation&Blending Center of Shenhua Ningxia Coal Group Co.Ltd.,Yinchuan 750409,China)
出处
《选煤技术》
CAS
2019年第4期67-70,共4页
Coal Preparation Technology
关键词
选煤厂
矸石带煤
振动筛
coal cleaning plant
loss of coal in refuse
vibrating screen
