摘要
广西合浦天然石英砂矿是我国超白玻璃用低铁石英砂(水洗砂)的重要原料基地。为了给该石英矿的高效利用提供科学依据,探索其高纯石英应用潜力,采用高纯石英提纯加工技术和ICP-OES、SEM-EDS、XRD等现代分析测试方法,系统研究了矿区代表性矿点不同粒级样品的组成结构和提纯加工效果等矿物材料学特征,提出了矿石类型划分的新方案,并对不同矿石类型工业应用潜力进行了分析,研究结果表明:(1)该矿床主要为古河槽沉积成因,根据矿石粒度大小与物质来源、SiO_(2)含量与提纯加工效果及工业应用潜力,将广西合浦天然石英砂矿划分为三种矿石类型:砾石矿(>2 cm)、粗砂矿(20~0.43 mm)和细砂矿(-0.43 mm)。(2)发现砾石矿的物质来源为脉石英,砾石矿原矿平均SiO_(2)含量为99.981%,平均Fe和Ti含量分别≤30×10^(-6)和5×10^(-6),酸洗砂平均SiO_(2)含量≥99.995%(4N5),个别样品氯化焙烧后SiO_(2)纯度可达到4N8,符合高纯石英矿的纯度标准,具有开发4N5高纯石英中高端产品的潜力。(3)粗砂矿的物质来源主要为脉石英,其水洗砂的平均SiO_(2)含量为99.936%,平均Fe和Ti含量分别≤30×10^(-6)和83×10^(-6),是加工超白玻璃用低铁石英砂的主要原料;酸洗砂平均SiO_(2)含量≥99.988%(3N8),具有开发集成电路用高端硅微粉等产品的潜力。(4)细砂矿的物质来源主要为花岗石风化产物,其水洗砂的平均SiO_(2)含量为99.736%,平均Fe含量≤302×10^(-6),可加工精制石英砂;若按不高于13%的比例与粗砂矿混配使用,可用作超白玻璃用低铁石英砂原料。
Natural quartz sand mine in Hepu,Guangxi is an important raw material based for low-iron quartz sand(washed sand)used in ultra-clear glass in China.In order to provide a scientific basis for the efficient utilization of this quartz ore and explore its application potential of high purity quartz,the purification and processing technology of high purity quartz and modern analytical and testing methods such as ICP-OES,SEM-EDS and XRD are adopted to systematically study the mineral materials characteristics such as the composition structure and purification and processing effect of samples of different particle sizes at the representative mineral point in the mining area.A new classification scheme for the ore types is proposed,and the industrial application potential of different ore types is analyzed.The results show that:①This deposit is mainly caused by the sedimentary formation of ancient river channels.According to the particle size and material source of the ore,the SiO_(2) content and purification processing effect,as well as the industrial application potential,the natural quartz sand ore in Hepu,Guangxi is classified into three ore types:gravel ore(>2 cm),coarse sand ore(20-0.43 mm),and fine sand ore(-0.43mm).②It is found that the material source of the gravel ore is vein quartz.The average SiO_(2) content of the raw gravel ore is 99.981%,and the average Fe and Ti contents are≤30×10^(-6) and 5×10^(-6) respectively.The average SiO_(2) content of acid washed sand is≥99.995%(4N5).After chlorination roasting,the purity of SiO_(2) in some individual samples can reach 4N8.It meets the purity standards of high purity quartz ore and has the potential to develop 4N5 intermediary grade products of high purity quartz.③Material source of coarse sand ore is mainly vein quartz.The average SiO 2 content of its washed sand is 99.936%,and the average Fe and Ti contents are≤30×10^(-6) and 83×10^(-6) respectively.It is the main raw material for low-iron quartz sand used in processing ultra-clear glass.The average SiO_(2) content of acid washed sand is≥99.988%(3N8),and it has the potential to develop high-end silicon micropowder and other products for integrated circuits.④Material source of fine sand ore is mainly the weathering products of granite.The average SiO_(2) content of its washed sand is 99.736%,and the average Fe content is≤302×10^(-6),which can be processed into refined quartz sand.If it is mixed with coarse sand ore at a ratio not exceeding 13%,it can be used as raw material for low-iron quartz sand for ultra-clear glass.
作者
王哲皓
李文兰
汪灵
陈志刚
王新砚
WANG Zhehao;LI Wenlan;WANG Ling;CHEN Zhigang;WANG Xinyan(Chengdu University of Technology,Chengdu 610059,China;Postdoctoral Research Station of Geological Resources and Geological Engineering,Chengdu University of Technology,Chengdu 610059,China)
出处
《中国矿业》
北大核心
2025年第7期221-231,共11页
China Mining Magazine
基金
国家自然科学基金项目资助(编号:41972039,41572038)。
关键词
石英
高纯石英
天然石英砂
高纯石英矿
低铁石英砂
quartz
highpurityquartz
naturalquartzsand
highpurityquartzore
low-ironquartzsand
作者简介
第一作者:王哲皓(1995-),男,汉族,山西晋城人,博士,在站博士后,主要从事矿物材料学及高纯石英等方面的研究工作,E-mail:wangzhehao@cdut.edu.cn。;通讯作者:汪灵(1958-),男,汉族,四川峨眉山人,博士,教授,博士生导师,主要从事矿物材料学及高纯石英等方面的研究工作,E-mail:wangling@cdut.edu.cn。
