降低金属镁渣中w(Mg^(2+))  

Reducing Mg^(2+) content in magnesium slag

作　　者：王玉飞[1,2] 马安瑞 刘倩倩 李健 闫龙[1,2] 陈娟 刘慧瑾[1,2] WANG Yufei;MA Anrui;LIU Qianqian;LI Jian;YAN Long;CHEN Juan;LIU Huijin(School of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,China;Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization,Yulin University,Yulin 719000,China;School of Chemistry and Chemical Engineering,Yan′an University,Yan′an 716000,China)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]陕西省低变质煤洁净利用重点实验室,陕西榆林719000 [3]延安大学化学与化工学院,陕西延安716000

出　　处：《化工科技》2022年第2期26-30,共5页Science & Technology in Chemical Industry

基　　金：国家自然科学基金项目(21663034);陕西省科技统筹创新工程计划项目(2016KTZDGY08-04-01);陕西省重点科技创新团队项目(2020TD-031);陕西省科技厅重点研发计划项目(2021GY-165);陕西省教育厅科研计划项目(21JP148);陕西省教育厅产业化项目(20JC039);陕西省科技厅重点产业创新链项目(2021ZDLGY13-05)。

摘　　要：利用金属氧化物与醇发生反应生成醇镁化合物的原理,使金属镁渣中MgO与无水甲醇反应从而降低金属镁渣中w(Mg^(2+)),提高镁渣在水泥材料生产中的利用率。通过考察加入CCl_(4)、HgCl_(2)等不同催化剂、催化剂的用量、反应时间、反应温度等因素对镁渣中w(Mg^(2+))的影响,从而得到降低镁渣中w(Mg^(2+))的较优条件。实验结果表明,在3 g镁渣与25 mL无水甲醇中加入6 mL CCl_(4)催化剂,t=56℃反应2 h,可使镁渣中w(Mg^(2+))由15.36%降低至6.29%。Based on the principle that metal oxide reacts with alcohol to form magnesium alcohol compound,MgO in magnesium slag reacts with anhydrous methanol to reduce the content of magnesium oxide in magnesium slag and improve the utilization rate of magnesium slag in cement production.The effects of different catalysts,such as CCl_(4) and HgCl_(2),the amount of catalyst,the reaction time and reaction temperature on the Mg^(2+)content in magnesium slag were investigated,and the optimal conditions for reducing the content of magnesium oxide in magnesium slag were obtained.The results showed that adding 6 mL CCl_(4) catalyst to 3 g magnesium slag and 25 mL anhydrous methanol at 56℃for 2 h can reduce the mass fraction of Mg^(2+)in magnesium slag from 15.36%to 6.29%.

关 键 词：金属镁渣 MGO 无水甲醇 四氯化碳 滴定分析 

分 类 号：TQ520.9[化学工程—煤化学工程] X789[环境科学与工程—环境工程]