超声电化学协同处理难沉降煤泥水的实验研究  

Experimental Research on Coal Slurry Pretreatment With Ultrasound and Electrochemistry

作　　者：王浩[1] 樊攀峰[2] 郑剑平[1] 王继伟[1] 任阳光 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭工程》2015年第5期118-121,共4页Coal Engineering

基　　金：国家自然科学基金青年基金资助项目(51204190)

摘　　要：为了强化难沉降煤泥水的絮凝沉降,使用超声电化学法对其进行预处理,用上清液浊度和沉降速度作评价指标,分析了电极、电解质、超声能量密度、超声时间四个因素对实验结果的影响。利用接触角仪和影像分析仪表征了超声电化学处理前后煤泥润湿性和絮团形貌,结果表明:该方法能强化煤泥水絮凝沉降,上清液浊度较单独电化学预处理降低5.88NTU,沉降速度提高2cm/min。最佳超声电化学条件为:阴极选用不锈钢,阳极选用石墨,硫酸镁为电解质,超声时间4min,超声能量密度0.5W/cm3。In order to strengthen the flocculation and settlement of coal slurry, a pretreatment method was proposed combining electrochemical with ultrasonic, supernate turbidness and sedimentation rate were chosen as evaluation indexes, the impact of different electrodes, electrolytes, ultrasonic energy density, ultrasonic time on sedimentation efficiency were analyzed. Contact angle meter and image analyzer were used to characterize the slime wettability and floc morphology ultrasound before and after electrochemical treatment. The results show that, sono - electrochemical pretreatment can improve the efficiency of coal slurry flocculation and sedimentation, compared with electrochemical pretreatment, supernate turbidity decreaseds by 5.88NTU and sedimentation rate improveds by 2cm/min. The optional sono - electrochemical conditions of graphite as anode and stainless steel as cathode, magnesium as electrolyte, ultrasonic time of 4min and ultrasonic energy density of 0. 5W/cm^3 were obtained.

关 键 词：煤泥水 超声 电化学 电极 电解质 沉降效果 

分 类 号：TD946.21[矿业工程—选矿]