菱镁矿浮选尾矿直接合成同时制备镁橄榄石和镁砂研究  

The simultaneous synthesis of high-quality forsterite and sintered magnesia from magnesite flotation tailings

作　　者：李亚芾 付亮亮 白浩隆 白丁荣 许光文[1] LI Yafu;FU Liangliang;BAI Haolong;BAI Dingrong;XU Guangwen(Key Laboratory on Resources Chemicals and Material of Ministry of Education,Shenyang University of Chemical Technology,Shenyang 110142,Liaoning,China;School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China)

机构地区：[1]沈阳化工大学资源化工与材料教育部重点实验室,辽宁沈阳110142 [2]辽宁科技大学化学工程学院,辽宁鞍山114051

出　　处：《化工学报》2022年第8期3679-3687,F0002,共10页CIESC Journal

基　　金：2021年度辽宁省教育厅自然科学基金面上项目(LJKZ0446);科技部重大项目(2020YFC1909300)。

摘　　要：为了有效利用菱镁矿浮选尾矿废弃物,提出以其为原料,在不添加任何物质、不经过高压压制成型的条件下直接烧制同时制备优质镁橄榄石和烧结镁砂的技术路线,并在高温管式炉中对其可行性进行了实验研究。通过对不同反应温度和时间条件下制备的样品进行XRD和SEM-EDS表征和分析,确认新技术路线不仅可行,并且还具有反应速度快、产品质量优等优势。当反应温度为1400℃及以上时,原料中的SiO_(2)在数分钟之内全部转化,产物镁橄榄石和烧结镁砂晶体发育良好。研究结果对进一步开发菱镁矿浮选尾矿废弃物高效利用新技术提供有力支持。This paper proposed producing high-quality forsterite and sintered magnesia by high-temperature solidstate reactions of the waste magnesia ore directly without adding other materials and briquetting in order to realize the value-added utilization of magnesite flotation tailings.The experiments were carried out in a high-temperature tubular reactor at different reaction temperatures and times.The reaction products were characterized by XRD and SEM-EDS.The results confirmed that the proposed method was technically feasible and had noticeable advantages,including the fast reaction rate and high product quality.When the reaction temperature is 1400℃and above,the SiO_(2) in the raw material is completely converted within a few minutes,and the product forsterite and sintered magnesia crystals are well developed.The research results provide strong support for the further development of new technologies of efficient utilization of magnesite flotation tailings.

关 键 词：菱镁矿浮选尾矿 镁橄榄石 烧结镁砂 细颗粒 高温固相反应 

分 类 号：TQ028.8[化学工程]