甲基纤维素对微细粒蛇纹石的絮凝作用及机理  

The Flocculation Behavior and Mechanism of Methylcellulose to Fine Serpentine

作　　者：汪惠惠[1,2,3] 彭金秀[1] 朱贤文[1] 程雨欣 

机构地区：[1]江西理工大学江西省矿业工程重点实验室,江西赣州341000 [2]西部矿业股份有限公司博士后科研工作站,青海西宁810000 [3]青海省高原矿物加工工程与综合利用重点实验室,青海西宁810000

出　　处：《非金属矿》2016年第5期1-3,共3页Non-Metallic Mines

基　　金：国家自然科学基金(51404109);江西省重大科技项目(20143ACG70008)

摘　　要：通过沉降试验、溶解试验,吸附量测试和zeta电位测试,研究不同温度条件下甲基纤维素对微细粒蛇纹石的絮凝作用,并考察其作用机理。结果表明,温度对蛇纹石颗粒的沉降具有一定影响,高温条件下蛇纹石颗粒的热运动较快,沉降速度较慢。甲基纤维素对蛇纹石的絮凝效果受温度影响较大,在25℃时,甲基纤维素溶解在水中,通过氢键作用吸附在蛇纹石表面,吸附量较低,絮凝作用较弱,蛇纹石颗粒沉降速度较慢;温度为65℃时,甲基纤维素从溶液中析出,沉积在蛇纹石表面,吸附量较大,产生较强的絮凝作用,从而使微细粒蛇纹石沉降速度加快。The settling behavior of serpentine using methylcellulose as flocculant has been studied and the mechanism has been discussed. The sedimentation results show that temperature has influence on the settling behavior of serpentine particles and the sedimentation velocity is more quickly at low temperature. Methylcellulose is a useful flocculant for the settling of serpentine but the flocculation effect of metbylcellulose is influenced greatly by temperature. When methylcellulose was added, large floccules formed and the sedimentation velocity of serpentine was more quickly at 65℃ compared to at 25℃. The reason is that methylcellulose has a critical solution temperature above which it become insoluble and strongly adsorbs onto the particles surfaces. The adsorbed reagent molecules are interconnection and make the particle form large flocs, which accelerate the sedimentation process.

关 键 词：蛇纹石 甲基纤维素 温度 絮凝 沉降 

分 类 号：TD923.3[矿业工程—选矿] X754[环境科学与工程—环境工程]