金尾矿固化氯离子的机理研究  

Study on the Curing Mechanism of Chloride Ions from Gold Tailings

作　　者：王长龙[1,2,3] 常宁 陈烈 吝晓然 靳倡智 刘振宇 张凯帆 霍泽坤 林庚 樊力华 WANG Changlong;CHANG ning;CHEN lie;LIN Xiaoran;JIN Changzhi;LIU Zhenyu;ZHANG Kaifan;HUO Zekun;LIN Geng;FAN Lihua(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Jiangxi Key Laboratory of Mining Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Tianjin Sunenergy Sega Environmental Science&Technology Co.Ltd,Tianjin 300000,China;School of Chemistry and Chemical Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Shanghai Ibeam Building Technology Co.,Ltd.,Shanghai 201900,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]江西理工大学江西省矿业工程重点实验室,江西赣州341000 [3]天津舜能世嘉环保科技有限公司,天津300000 [4]西安科技大学化学与化工学院,陕西西安710054 [5]上海艾彬建筑科技有限公司,上海200190

出　　处：《矿产保护与利用》2018年第4期112-117,共6页Conservation and Utilization of Mineral Resources

基　　金：中国博士后科学基金(2016M602082);河北省自然科学基金(E2018402119);河北省高等学校科学研究项目(ZD2016014;QN2016115);陕西省尾矿资源综合利用重点实验室开放基金(2017SKY-WK008);邯郸市科学技术研究与发展计划项目(1621211040-3);江西省博士后日常经费资助(2016RC30);江西省博士后科研项目(2017KY19);固废资源化利用与节能国家重点实验室开放基金(SWR-2017-006)

摘　　要：以火山灰质金尾矿为原材料,通过机械力活化和复合活化工艺(将机械力活化后的金尾矿进行热活化)激发尾矿硅铝活性,采用XRD、SEM、FT-IR测试手段测试水化产物,分析了胶凝材料水化机理及其对氯离子的固化机理。试验结果表明:由粉磨60 min再经750℃热活化1 h的金尾矿粉组成的胶凝材料固氯效果良好,胶砂块力学性能更加优异,活性尾矿粉的掺入促进了铝酸三钙(C_3A)、铁铝酸四钙(C_4AF)等矿物与氯离子化学结合生成Friedel盐的能力,同时掺入复合活化金尾矿粉的试样中有更多能吸附氯离子的硅酸钙凝胶(C-S-H)和钙矾石(AFt)产物,试样密实度提高的同时其固化氯离子的能力也提升。Using the pozzolanic gold tailings as the main raw materials,mechanical grinding and chemical activations were used to stimulate the pozzolanic activity of gold tailings,where the gold tailings are treated by mechanical activation and then thermal activation).Hydration mechanism of cementing material and its curing mechanism of chloride ions are analyzed by X-ray diffraction analysis(XRD),Fourier transform infrared spectroscopy(FT-IR),and scanning electron microscope(SEM).The results show that the gold tailings treated at the conditions of grinding 60 min and heating 750℃,has a favorable effect of chlorine fixation and mechanical properties.The highly active tailings promote the C 3A,C 4AF to combine with chlorine ions and produce more Friedel salt.In addition,more C-S-H gels and ettringite(AFt)hydration products appear with the addition of active tailings,which makes the structure of the hardened slurry dense and have good chlorine retention ability.

关 键 词：金尾矿 胶凝材料 硅酸钙凝胶 钙矾石 固化机理 

分 类 号：TD926.42[矿业工程—选矿]