利用菱镁矿碳化残渣制备花状碱式碳酸镁晶体
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摘要
为综合利用废弃资源,以菱镁矿碳化残渣为原料,采用盐酸酸浸、碱化、碳化法制备碱式碳酸镁晶体,考察盐酸浓度、酸浸时间、酸浸温度和固液比对产物收率的影响。利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)表征所得产物的物相组成和微观形貌。结果表明,盐酸浓度1.0mol/L、酸浸时间60min、酸浸温度60℃、固液比1∶20时,酸浸后的滤液经碱化、碳化、热解制备了收率为54%、平均直径为10μm的花状结构碱式碳酸镁晶体。研究成果可以实现废弃镁资源的回收利用,对环境保护具有积极意义。
In order to comprehensively utilize the waste resources,hydromagnesite is prepared by hydrochloric acid leaching,alkalization and carbonization from magnesite carbonization resiude.The influence of hydrochloric acid concentration,acid leaching time,temperature and solid-liquid ratio on the yield of products were investigated.The phase composition and morphology of the products were characterized by XRD and SEM.The results show that the optimum acid leaching process was hydrochloric acid concentration of 1.0 mol/L,acid leaching time of 60 min,acid leaching temperature of 60℃ and solid-liquid ratio of 1∶20.Then,flower-like hydromagnesite with an average diameter of 10 microns and a yield of 54% were prapared by alkalization and carbonation of the filtrate after acid leaching.The research results can realize the recrying of the waste magnesium resources and show positive significance for environmental protection.
In order to comprehensively utilize the waste resources,hydromagnesite is prepared by hydrochloric acid leaching,alkalization and carbonization from magnesite carbonization resiude.The influence of hydrochloric acid concentration,acid leaching time,temperature and solid-liquid ratio on the yield of products were investigated.The phase composition and morphology of the products were characterized by XRD and SEM.The results show that the optimum acid leaching process was hydrochloric acid concentration of 1.0 mol/L,acid leaching time of 60 min,acid leaching temperature of 60℃ and solid-liquid ratio of 1∶20.Then,flower-like hydromagnesite with an average diameter of 10 microns and a yield of 54% were prapared by alkalization and carbonation of the filtrate after acid leaching.The research results can realize the recrying of the waste magnesium resources and show positive significance for environmental protection.
引文
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[2] 王余莲,印万忠,姚金,等,菱镁矿法合成微纳米三水碳酸镁晶须的研究[J].东北大学学报:自然科学版,2014,35(9):1335-1339.
[3] 闫平科,卢智强,赵永帅,等.低品位菱镁矿加压碳酸化法提取实验研究[J].硅酸盐通报,2015,34(11):3372-3376.
[4] 闫平科,张旭,赵永帅,等.氯化铵浸出低品位菱镁矿试验研究[J].非金属矿,2016,39(4):8-10,16.
[5] CHEN J,HUANG Z L,CHEN C L,et al.Preparation and growth mechanism of plate-like basic magnesium carbonate by template-mediated/homogeneous precipitation method[J].J Cent South.Univ:Sci Technol(in Chinese),2018,25(4):729-735.
[6] 王余莲,印万忠,张夏翔,等.大长径比三水碳酸镁晶须的制备及晶体生长机理[J].硅酸盐学报,2018,46(7):938-945.
[7] 王余莲,印万忠,张夏翔,等.三水碳酸镁法制备碱式碳酸镁过程研究[J].矿产保护与利用,2017(4):81-86.