| 热解法制备碱式碳酸镁 |
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| 引用本文： | 陈白珍,江剑兵,徐徽,石西昌,吴保安.热解法制备碱式碳酸镁[J].中南大学学报(自然科学版),2008,39(5). |
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| 作者姓名： | 陈白珍 江剑兵 徐徽 石西昌 吴保安 |
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| 作者单位： | 中南大学,冶金科学与工程学院,湖南,长沙,410083 |
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| 摘 要： | 以盐湖水氯镁石氨法一次沉镁后的母液经碳酸氢铵二次沉镁得到的复盐MgCO3·(NH4)2CO3·H2O为原料,采用热解法制备碱式碳酸镁.研究液固比、Mg2 用量、预氨量、热解温度和热解时间对产品质量的影响.研究结果表明:在液固比为6,Mg2 实际用量与理论用量的摩尔比为1：1,热解温度为90～100 ℃,预氨量为0.2 mL/g复盐和热解时间为4.0 h的工艺条件下得到的碱式碳酸镁质量达到HG/T 2959-2000标准,该工艺可作为盐湖水氯镁石制备碱式碳酸镁的有效方法.
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| 关 键 词： | 碱式碳酸镁 复盐 热解 水氯镁石 碳酸氢铵 卤水 |
Preparation of basic magnesium carbonate by pyrogenation |
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| CHEN Bai-zhen,JIANG Jian-bing,XU Hui,SHI Xi-chang,WU Bao-an.Preparation of basic magnesium carbonate by pyrogenation[J].Journal of Central South University:Science and Technology,2008,39(5). |
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| Authors: | CHEN Bai-zhen JIANG Jian-bing XU Hui SHI Xi-chang WU Bao-an |
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| Institution: | CHEN Bai-zhen,JIANG Jian-bing,XU Hui,SHI Xi-chang,WU Bao-an(School of Metallurgical Science , Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | Basic magnesium carbonate was prepared by pyrolyzing MgCO3.(NH4)2CO3.H2O which was made from the mother liquid produced during precipitating Mg2+ from saline bischofite by ammoniation.Ammonium acid carbonate was used as the precipitation agent when MgCO3.(NH4)2CO3.H2O was prepared.The effects of liquid to solid ratio,ammonia amount used for pre-aminating,pyrogenation temperature and time on the product quality were investigated.The results show that under the condition of liquid to solid ratio 6,Mg2+ molar ... |
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| Keywords: | basic magnesium carbonate compound salt pyrogenation bischofite ammonium bicarbonate brine |
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