| 有机酸溶浸深部杂卤石工艺及机理 |
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| 引用本文： | 葛英霞, 李珍, 黄焱球, 张红. 有机酸溶浸深部杂卤石工艺及机理[J]. 矿产保护与利用, 2016, (6): 47-51. doi: 10.13779/j.cnki.issn1001-0076.2016.06.010 |
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| 作者姓名： | 葛英霞 李珍 黄焱球 张红 |
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| 作者单位： | 纳米矿物材料及应用教育部工程研究中心，湖北 武汉430074; 中国地质大学 材料与化学学院，湖北武汉430074;; 纳米矿物材料及应用教育部工程研究中心，湖北 武汉430074; 中国地质大学 材料与化学学院，湖北武汉430074;; 纳米矿物材料及应用教育部工程研究中心，湖北 武汉430074; 中国地质大学 材料与化学学院，湖北武汉430074;; 四川佰瑞德矿业有限责任公司,四川成都,610091 |
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| 基金项目： | 四川省科技厅科技服务业示范项目(2016GFW0150) |
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| 摘 要： | 采用草酸、甲酸对四川块状杂卤石进行溶浸试验,研究杂卤石矿在有机酸中的溶出机理,指导深部杂卤石的溶采开发。考察了溶浸时间对K+、Mg2+、Ca2+浓度与溶出率的影响,并对比了溶浸前后杂卤石的物相及形貌变化。结果表明:有机酸溶浸剂有利于K+、Mg2+溶出,不利于Ca2+溶出;有机酸溶浸液经加热浓缩后用无水乙醇洗涤,得到的产物主要为钾、镁硫酸盐,产物成分简单,有利于后期硫酸钾产品的提纯。有机酸溶浸杂卤石矿主要通过酸解反应分解菱镁矿,生成的CO2对矿石有崩解作用,二者作用促进内部杂卤石的暴露与溶解。
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| 关 键 词： | 杂卤石 甲酸 草酸 溶浸 机理 |
Process and Mechanism of Leaching Deep-seated Polyhalite with Organic Acid |
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| GE Yingxia, LI Zhen, HANG Yanqiu, ZHANG Hong. Process and Mechanism of Leaching Deep-seated Polyhalite with Organic Acid[J]. Conservation and Utilization of Mineral Resources, 2016, (6): 47-51. doi: 10.13779/j.cnki.issn1001-0076.2016.06.010 |
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| Authors: | GE Yingxia LI Zhen HANG Yanqiu ZHANG Hong |
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| Abstract: | The leaching experiment of blocky polyhalite from Sichuan was conducted by using oxal-ic acid and formic acid .This paper mainly study the mechanism of dissolution of polyhalite in or-ganic acid, and to guide the industrialization of mining deep -seated polyhalite .The influence of dissolution time on the concentration and recovery of K +, Mg2+, Ca2+as well as the phase and morphology of polyhalite were investigated .The results indicated that organic acids were in favor of dissolution of K +, Mg2+, but adverse to dissolution of Ca 2+.Organic acid leaching solution was firstly concentrated by heating and then washed by ethanol .The product mainly included potassi-um, magnesium sulfate , which was simple and conducive to the purification of potassium sulfate . The dissolution occurred mainly through acid hydrolysis reaction of magnesite and the disintegration effect of CO 2 on the internal structure of polyhalite , both of which could promote internal exposure and dissolution of polyhalite . |
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| Keywords: | polyhalite formic acid oxalic acid leaching mechanism |
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