烧成温度对菱镁矿尾矿合成镁橄榄石性能的影响  

Effect of Firing Temperature on Properties of Forsterite Synthesized by Magnesite Tailings

作　　者：董浩然 聂建华[1] 梁永和[1] 蔡曼菲 鞠茂奇 温立冬 李洲 DONG Haoran;NIE Jianhua;LIANG Yonghe;CAI Manfei;JU Maoqi;WEN Lidong;LI Zhou(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;Wuhan Research Institute of Metallurgy Construction Co.,Ltd.of MCC Group,Wuhan 430081,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉430081 [2]中冶武汉冶金建筑研究院有限公司,武汉430081

出　　处：《硅酸盐通报》2023年第6期2054-2061,共8页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金联合基金重点项目(U21A2058)。

摘　　要：以菱镁矿尾矿和硅石为原料,采用固相烧结法合成陶粒支撑剂用镁橄榄石原料,不仅有利于菱镁矿尾矿的二次资源化利用,还可代替天然镁橄榄石作为陶粒支撑剂原料,为其制备原料提供新的方向。本文通过对物相组成、显微结构、常温物理性能等表征,探究了不同烧成温度对合成镁橄榄石性能的影响,同时横向对比了不同烧成温度下试样的酸溶解度。结果表明,当烧成温度为1 400~1 550℃、恒温时间为3 h时,试样中的主物相均为镁橄榄石;随着烧成温度的提高,镁橄榄石晶粒不断增大,提高了试样的常温物理性能与耐酸性能,但过高的烧成温度会导致试样中玻璃相含量的增加,影响其性能。当烧成温度为1 500℃时,试样常温力学性能达到最大值,酸溶解度最低。Forsterite raw material for ceramic proppant was synthesized by solid-phase sintering method with magnesite tailings and silica as raw materials,which is not only beneficial to the secondary resource utilization of magnesite tailings,but also can replace natural forsterite as raw material for ceramic proppant,providing a new direction for the preparation of raw material for ceramide proppant.The effects of different firing temperatures on the properties of synthetic forsterite were investigated by characterization of phase composition,microstructure and cold physical properties.The acid solubility of samples at different firing temperatures was compared.The results show that when the firing temperature are 1 400~1 550 ℃ for 3 h,the main phase of samples is forsterite.With the firing temperature increases,the grain size of forsterite increases continuously,which improves the cold physical properties and acid resistance of samples.However,an excessively high firing temperature lead to an increase of glassy phase content in samples,affecting its performance.When the firing temperature is 1 500 ℃,cold mechanical properties of samples reach the maximum value,and acid solubility is the lowest.

关 键 词：菱镁矿尾矿 镁橄榄石 烧成温度 陶粒支撑剂 固相烧结 酸溶解度 

分 类 号：TQ17[化学工程—硅酸盐工业]