TiO_(2)对黄金尾砂微晶泡沫玻璃非等温析晶活化能的影响  

Effect of TiO2 on Crystallization Activation Energy of Gold Tailings Microcrystalline Foam Glass

作　　者：孙晓刚[1] 王海龙 邢军[1] 邱景平[1] 程春宏 Sun Xiaogang;Wang Hailong;Xing Jun;Qiu Jingping;Cheng Chunhong(College of Resource&Civil Engineering,Northeastern University,Shenyang,Liaoning,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《矿产综合利用》2021年第1期151-156,共6页Multipurpose Utilization of Mineral Resources

基　　金：十三五国家重点研发课题(2018YFC0604604);国家自然科学基金面上项目(51774066)。

摘　　要：以黄金尾砂为主要原料,改变原料中晶核剂TiO_(2)的掺量,制备微晶泡沫玻璃。运用差热分析(DSC)、X射线衍射仪(XRD)等分析手段,研究TiO_(2)掺量对微晶泡沫玻璃析晶与发泡的影响。结果表明,随着TiO_(2)含量的增加,析晶活化能呈现出先减小后增大的规律,当TiO_(2)添加量为3.5%时,析晶活化能较小,为95 kJ/mol;同时微晶泡沫玻璃析出的主晶相为硅灰石(CaSiO_(3)),次晶相为钙长石(CaAl2Si2O_(8));当TiO_(2)添加量为3%~4%时,制备得到的微晶泡沫玻璃具有良好的物理性能;主晶相硅灰石(CaSiO_(3))不随TiO_(2)的添加改变,并且TiO_(2)能促进晶相生长。Microcrystalline foamed glass was prepared from gold tailings as the main raw material and the amount of MICROTEK nucleating agent TiO_(2)was changed.The effects of TiO_(2)content on the crystallization and foaming of microcrystalline foamed glass were studied by means of differential thermal analysis(DSC)and X ray diffractometer(XRD).The results show that with the increase of the content of titanium dioxide,the activation energy of crystallization first decreases and then increases.When the addition amount of TiO_(2)is 3.5%,the crystallization activation energy is the smallest,95KJ/mol.The main crystalline phase of the microcrystalline foamed glass is wollastonite(CaSiO_(3));and the secondary phase is calcium feldspar(CaAl2Si2O_(8));At the same time,when the amount of TiO_(2)is 3%~4%,the sintered microcrystalline foamed glass has good physical properties.The main crystalline phase wollastonite(CaSiO_(3))does not change with the addition of TiO_(2),and TiO_(2)can promote crystal phase growth.

关 键 词：微晶泡沫玻璃 TIO2 析晶动力学 硅灰石 

分 类 号：TD982[矿业工程—选矿]