摘要
为了解决煤泥处理过程中,混凝剂投料过量造成药剂浪费,且混凝沉降效果差等问题,选择了煤泥中的主要成分高岭石和蒙脱石,对其进行絮凝沉降,探究各组分沉降性能,之后与煤泥进行配比,探究各组分对煤泥沉降性能的影响。实验结果表明:阴离子型絮凝剂作用下,高岭石絮凝沉降效果最佳,蒙脱石需在大剂量阴离子型絮凝剂存在时才可产生沉降;凝聚剂二价CaCl2与MgCl2加入,可提高高岭石和蒙脱石的沉降速度,三价的FeCl3与AlCl3加入后,在较小药剂量下,可提高上清液透射比;高岭石对精煤沉降效果影响较小,蒙脱石的加入大大降低精煤沉降效果。
In order to solve the problems such as waste of chemicals caused by excessive coagulant feeding and poor coagulation sedimentation effect in the process of coal slime treatment,kaolinite and montmorillonite were selected as the main components of coal slime to conduct flocculation and sedimentation,and the sedimentation performance of each component was explored.After mixing with coal slime,the influence of each component on the settling performance of coal slime wss explored.The experimental results show that the flocculation and settlement of kaolinite is the best under the action of anionic flocculant,and the sedimentation of montmorillonite can only be produced in the presence of a large dose of anionic flocculant;the sedimentation rate of kaolinite and montmorillonite can be increased by adding coagulant divalent CaCl2 and MgCl2,and the transmission ratio of supernatant can be increased by adding trivalent FeCl3 and AlCl3 in a small dosage,kaolinite has little effect on the settling effect of cleaned coal,and the addition of montmorillonite greatly reduces the settling effect of cleaned coal.
作者
武铁虎
Wu Tiehu(Coal Plant,Lyulin Energy Corporation Ltd.,Shanxi Coking Coal Hozhou Coal and Power Group,Lvliang 033200,China)
出处
《煤炭与化工》
CAS
2020年第11期134-137,141,共5页
Coal and Chemical Industry
关键词
煤泥
沉降性能
煤泥组分
混凝剂
高岭石
蒙脱石
slime
settling performance
slime composition
coagulant
kaolinite
montmorillonite
