【摘要】 在分析了滇东旧堡煤矿煤层煤质特征的基础上,利用筛分试验和浮沉试验研究了该矿区煤的可选性。研究结果表明,该矿区K2、K5可采煤层均为中灰分、特低硫和中等挥发分煤。筛分试验结果显示,在13～0 mm粒级中,主采煤层的煤主要分布在13～6 mm的粒度范围内,且筛分后各粒级水分、硫分均无大的变化,但灰分都随粒度减小而有所下降。浮沉试验结果显示,K2煤层的煤为难选煤,K5煤层的煤则为极难选煤。更多还原

【Abstract】 On the basis of the coal quality characteristics,the screening and float-and-sink tests have been carried out to investigate the washability of the coals in the Jiubao coal mine,eastern Yunnan.The results showed that the K2,K5 coal seams were medium ash,extremely low-low sulfur and medium volatile coals.The screening test results showed that the coals in the 0~13mm grain grade were mainly distributed in the size range of 13~6mm.The levels of the water and total sulfur varied little in different size grades of coals,but in a same size grade the ash decreased with the size.The float-and-sink tests showed that the coal washability of K2 coal seam was in the difficult degree,and the coal washability of K5 coal seam was in the extremely difficult degree.更多还原