电浮选-电凝聚法分离煤岩显微组分的影响因素  

Influencing factors of electroflotation-electrocoagulation seperation of coal macerals

作　　者：赵伟[1,2] 屈进州[1,2] 李振 杨志远[1,2] 周安宁[1,2] ZHAO Wei1,2,QU Jinzhou1,2,LI Zhen1,2 ,YANG Zhiyuan1,2,ZHOU Anning1,2(1. College of Chemistry ＆ Chemical Engineering,Xi＇an University of Science and Technology,Xi＇an 710054, China ; 2. Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi＇an 710021, Chin)

机构地区：[1]西安科技大学化学与化工学院,陕西西安710054 [2]国土资源部煤炭资源勘查与综合利用重点实验室,陕西西安710021

出　　处：《洁净煤技术》2018年第1期57-62,共6页Clean Coal Technology

基　　金：陕西省自然科学基金资助项目(2017JM5002);国家自然科学基金资助项目(51674194)

摘　　要：利用电浮选-电凝聚方法进行煤岩显微组分的分离,考察了矿浆pH值、电压强度、浮选时间以及矿浆浓度和电解凝聚对分离效果的影响。通过回收率及镜质组和惰质组的富集率对分选效果进行了评价。结果表明:控制矿浆pH值、电压强度、浮选时间及矿浆浓度可调整浮选回收率及煤岩显微组分富集率;电凝聚作用可有效强化煤岩显微组分的浮选分离,该作用受反应过程中铝离子浓度的控制,铝离子浓度越大,絮团生成速率越快;调节阳极电化学反应速率可改变溶液体系中铝离子浓度及其水解形式,进而控制浮选分离效果。The separation of coal macerals was studied by an electroflotation-electrocoagulation method.The effect of the pH of pulp,voltage intensity,flotation time,pulp concentration and electrocoagulation on separation was investigated.Separation effect was evaluated by the enrichment and recovery rate of the coal vitrinite and inertinite.The results indicate that the pH of pulp,the voltage,flotation time and pulp density can be controlled to adjuste the rate of flotation recovery and enrichment of coal macerals.The flotation separation of coal macerals can be intensified effectively with the electrocoagulation.The effect of the electrocoagulation is controlled by the concentration of aluminum ion in the reaction process,and the higher the concentration of aluminum ions is,the faster the formation rate of flocculation will be.The adjustment of the electrochemical reaction rate of the anode can change the aluminum concentration and its hydrolysis form in the solution and control the effect of flotation separation.

关 键 词：电浮选 电凝聚 煤岩显微组分 影响因素 

分 类 号：TD923[矿业工程—选矿] TQ533[化学工程—煤化学工程]