Crystal structure transformation and lattice impurities migration of quartz during chlorine roasting  

作　　者：Wenda Guo Haolong Lu Zhenyue Zhang Ling Jiang Hanjun Wu Defeng Liu Ruan Chi 

机构地区：[1]Xingfa School of Mining Engineering,Wuhan Institute of Technology,Wuhan 430073,China [2]Hubei Xingfa Chemicals Group Co.,Ltd.,Yichang 443002,China [3]Hubei Three Gorges Laboratory,Yichang 443002,China

出　　处：《International Journal of Mining Science and Technology》2024年第10期1465-1474,共10页矿业科学技术学报（英文版）

基　　金：provided by the National Natural Science Foundation of China(No.52374273);the China Postdoctoral Science Foundation Project(No.2023M731041)。

摘　　要：To investigate the effect of chlorine roasting on the migration and removal of trace elements in quartz lattice,firstly,an efficient pretreatment process,grinding–HCl washing–flotation–HF and HCl leaching,was used to remove the gangue minerals in quartz ore to obtain purified quartz for the preparation of high-purity quartz and the investigation of lattice impurities migration.The results showed that the high-purity quartz with total impurities less than 50μg/g could be obtained from purified quartz after being treated with chlorine at 1200°C.The variation of crystal structure and the lattice impurities migration of quartz during chlorine roasting were studied through in-situ XRD,TGA,SEM-EDS,ICP-MS,FT-IR and XPS analysis.It revealed that the decomposable impurities H_(2)O,-OH,and residual collectors in the crystal of purified quartz could be effectively removed through chlorine roasting above 900°C,which also had an obvious effect on the removal of low-valence trace elements Li,Na and K in the crystal of quartz but didn't affect the multivalent trace elements Al and Ti.This study revealed the removal and migration mechanism of the trace elements in quartz crystal during chlorine roasting.

关 键 词：QUARTZ Purification Chlorine roasting Crystal structure Trace elements 

分 类 号：TD985[矿业工程—选矿]