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| 用蛇纹石制取高纯度活性氧化镁的工艺研究 | |
| 引用本文： | 董声雄,崔静磊,陈峰. 用蛇纹石制取高纯度活性氧化镁的工艺研究[J]. 化工矿物与加工, 2011, 40(11): 5-8 |
| 作者姓名： | 董声雄 崔静磊 陈峰 |
| 作者单位： | 1. 宁德师范学院化学系,福建宁德352100;福州大学化学化工学院,福建福州350108 2. 福州大学化学化工学院,福建福州,350108 3. 宁德师范学院化学系,福建宁德,352100 |
| 摘 要： | 研究了以蛇纹石为原料制取高纯度活性氧化镁的工艺。以硫酸浸取蛇纹石矿石得到硫酸镁,以精制硫酸镁溶液为原料,氨水、碳酸氢铵为沉淀剂制取碱式碳酸镁前驱体,煅烧碱式碳酸镁前驱体得到高纯度活性氧化镁产品。考察了制取碱式碳酸镁的工艺条件,最佳工艺条件为:预氨pH值为9.6～9.7、镁离子与总铵(NH3+NH4+)摩尔比为0.46、氨与碳酸氢铵摩尔比为1.4。在此条件下,镁的沉淀率达到最大值89%。碱式碳酸镁前驱体最佳煅烧条件为:升温速率10℃/min,煅烧温度650℃,煅烧时间2h。在此条件下得到了碘吸附值为165.1mgI2/gMgO、柠檬酸活性值为3.05s、比表面积为78.03m2/g的高纯活性氧化镁。 |
| 关 键 词： | 蛇纹石 活性氧化镁 高纯度 碱式碳酸镁 |
Studies on production of high-purity activated magnesium oxide from serpentine |
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| DONG Sheng-xiong,CUI Jing-lei,CHEN Feng. Studies on production of high-purity activated magnesium oxide from serpentine[J]. Industrial Minerals and Processing, 2011, 40(11): 5-8 | |
| Authors: | DONG Sheng-xiong CUI Jing-lei CHEN Feng |
| Affiliation: | DONG Sheng-xiong1,2,CUI Jing-lei1,CHEN Feng1(1.Department of Chemistry,Ningde Normal University,Ningde Fujian 352100,China,2.College of Chemical & Chemical Engineering,Fuzhou University,Fuzhou Fujian 350108,China) |
| Abstract: | Production of high-purity activated magnesium oxide from serpentine was investigated in this paper.First,magnesium sulfate was obtained through sulfuric acid leaching of serpentine.Then,the refined magnesium sulfate solution was mixed with ammonia and ammonium bicarbonate as precipitating reagent to produce basic magnesium carbonate precursor,which went through calcinations to generate high-purity activated magnesium oxide.The results showed that under the optimal operating conditions(aminated pH value at r... |
| Keywords: | serpentine activated magnesium oxide high purity basic magnesium carbonate |
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