糯东矿无烟煤分选工艺的选择

为提高无烟煤分选效果,分析了糯东矿煤质特性、粒度组成和可选性,确定原煤属低中灰~中灰、中高硫~高硫、低磷、特低抗破碎强度无烟煤,煤中硫以无机硫化铁硫形式为主;煤中细粒级含量较高,需加强细粒煤分选,粗煤泥可单独分选,产品易脱水;原煤可选性为中等可选。结合原煤性质,确定糯东选煤厂产品定位为:17煤分选中、小块煤用于化工用煤,末精煤用于高炉喷吹用煤;20煤分选中、小块煤用于化工用煤,混煤用于动力用煤。通过对比分析常用选煤方法及工艺的特点,确定糯东选煤厂无烟煤分选方案为:选前+100(80)mm检查性手选、-100(80)mm混合跳汰入选、粗煤泥干扰床分选机(TBS)分选、细煤泥浮选、尾煤浓缩压滤的联合工艺流程。

Select on anthracite washing and processing technology in Nuodong mine

To improve the separation effects of anthracite,taking Nuodong mine as research object,analyze the coal quality characteristics, size composition,washability and floatability.The results show that the raw coal is low and low-medium ash,high-medium and high sulfur, low phosphorus,extra-low anti-breaking strength anthracite,the sulfur in coal is in the form of inorganic iron sulfide.Higher fine coal de-termines that its separation needs to be strengthened,the coarse slime can be individually sorted,the products are easy to dehydrate,the coal washability is medium optional.Combined with the properties of raw coal,determine the product positioning of Nuodong coal prepara-tion plant is that,the seventeenth coal separation lump coal is used in coal chemical industry,clean coal is used in blast furnace blowing. The twentieth coal separation lump coal is used in coal chemical industry,clean coal is used in pulverized coal injection into blast furnace. Through analyzing the features of the common preparation methods and process,determine the anthracite sorting scheme in Nuodong coal preparation plant.Before separation,treat the＋100（80） mm size with hand picking method,separate the-100（80） mm size with jigging, coarse slime with teetered bed separator,select the fine slime with flotation,concentrate the tailings by filter pressing.