摘要
以庞庞塔矿选煤厂难浮煤泥为研究对象,通过小浮沉试验和分步释放浮选试验,得出其可浮性差的原因是中间密度物含量较高。该煤泥不同程度解离后的浮选试验结果表明,在磨煤时间为7 min(平均粒度11.75μm)时,可取得最佳浮选效果,精煤产率达到74.37%,比未经磨煤时提高了6.05个百分点;灰分为9.52%,比未经磨煤时降低了6.08个百分点。
Taking example of difficult floated coal slime from coal preparation plant of Pangpangta mime,based on float- and- sink test and timed- release analysis,it is difficult to float this slime as a result of high content of intermediate density material. Different results of slime flotation test are obtained at different degree of dissociation,however,the best floatation with the 74. 37% yield of clean coal and 9. 52%ash content of clean coal,is obtained in 7 minutes of grinding slime（ average particle size to be11. 75 μm）. Compared with original slime,yield of clean coal is increased by 6. 05%,and ash content of clean coal is reduced by 6. 08%.
出处
《选煤技术》
CAS
2015年第4期6-9,共4页
Coal Preparation Technology
基金
国家自然科学基金(51474221)
关键词
浮选
难浮煤泥
解离
可浮性
flotation
difficult floated slime
dissociation
floatability
