A novel strategy for the efficient purification of quartz ore: Experiments, DFT calculations, and life cycle assessment

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL Process Safety and Environmental Protection Pub Date : 2025-02-01 DOI:10.1016/j.psep.2024.12.104

Cong Li , Xuebao Tang , Xingyu Liu , Suqin Li

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Abstract

Quartz ore is a useful raw material for producing high-purity quartz. In this study, high-purity quartz is prepared by superconducting high-gradient magnetic separation (S-HGMS) coupled with fluorine-free acid leaching process. The results indicate that the main impurities in quartz ore are monticellite (Ca (Mg, Fe) SiO₄), grossular ((Ca, Fe) (Al, Zr, Fe) Si₃O₁₂), thadeuite (Mg (Ca, Mn) (Mg, Fe, Mn)₂(PO₄)₂(OH)₂), and berlinite (AlPO₄). The weak magnetic impurities are removed by the S-HGMS process, while the fluorine-free acid leaching technology removes berlinite and inclusion impurities from the quartz ore. The final high-purity quartz sand grade is 99.971 %. In addition, experimental analysis as well as first-principles density functional theory (DFT) calculations are utilized to examine the magnetic properties of mineral components in quartz ore. Life cycle assessment (LCA) is conducted to determine the environmental impact of the high-purity quartz sand preparation process, and the contribution of each raw material to high-purity quartz sand production is analyzed. Overall, this study not only establishes an advanced purification process for efficiently removing impurities from quartz ore, which can serve as a theoretical basis for boosting the industrial applications of quartz ore.

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石英矿石高效提纯的新策略：实验、DFT计算和生命周期评估

石英矿是生产高纯石英的有用原料。本研究采用超导高梯度磁选（S-HGMS）耦合无氟酸浸工艺制备了高纯石英。结果表明：石英矿石中主要杂质为蒙脱石（Ca (Mg, Fe) SiO4）、粗晶(（Ca, Fe) (Al, Zr, Fe) Si3O12）、白脱石(Mg (Ca, Mn) (Mg, Fe, Mn)2（PO4)2(OH)2）和白脱石（AlPO4）。采用S-HGMS工艺去除弱磁性杂质，采用无氟酸浸工艺去除石英矿石中的铍石和包裹体杂质，最终获得的高纯石英砂品位为99.971 %。此外，利用实验分析和第一性原理密度功能理论（DFT）计算来检验石英砂中矿物组分的磁性。通过生命周期评估（LCA）来确定高纯石英砂制备过程的环境影响，并分析了每种原料对高纯石英砂生产的贡献。综上所述，本研究不仅建立了一种高效去除石英矿中杂质的先进提纯工艺，为推进石英矿的工业应用提供了理论基础。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.