| 硫酸浸取法提取一水硬铝石中氧化铝工艺研究 |
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| 引用本文： | 宋凯,陈廷益,马垒.硫酸浸取法提取一水硬铝石中氧化铝工艺研究[J].矿冶工程,2017,37(2):91-93. |
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| 作者姓名： | 宋凯 陈廷益 马垒 |
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| 作者单位： | 1.贵州师范大学 材料与建筑工程学院,贵州 贵阳 550001;
2.桂林电子科技大学 广西信息材料重点实验室,广西 桂林 541004 |
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| 基金项目： | 贵阳市白云区科技计划项目(白科合同[2013]号);
广西信息材料重点实验室开放研究基金(161005-K);
贵州师范大学博士启动金项目 |
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| 摘 要： | 以低品位的一水硬铝石型铝土矿为原料,对硫酸浸取法提取铝土矿中氧化铝的工艺进行了研究。通过单因素实验和正交实验研究了硫酸浸取法提取铝土矿中氧化铝过程中硫酸浓度、反应时间、反应温度和液固比对氧化铝溶出率的影响。结果表明,在硫酸浓度90%、反应温度180 ℃、液固比8∶1、加热时间120 min的条件下,氧化铝相对溶出率达到90.23%以上。该工艺在常压下进行,对铝土矿的开发利用具有重要意义。
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| 关 键 词： | 铝土矿 一水硬铝石 低铝硅比 硫酸浸出 氧化铝 |
| 收稿时间： | 2016-10-13 |
Extraction of Alumina from Diasporic Bauxite by Sulfuric Acid Leaching |
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| SONG Kai,CHEN Ting-yi,MA Lei.Extraction of Alumina from Diasporic Bauxite by Sulfuric Acid Leaching[J].Mining and Metallurgical Engineering,2017,37(2):91-93. |
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| Authors: | SONG Kai CHEN Ting-yi MA Lei |
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| Affiliation: | 1.School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550001, Guizhou, China;
2.Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, Guangxi, China |
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| Abstract: | With low-grade diasporic bauxite as raw material, experiments were conducted for extraction of alumina by sulfuric acid leaching. Based on the single-factor test and orthogonal test, effects of sulfuric acid concentration, reaction time and temperature, as well as liquid/solid ratio on the leaching rate of alumina were investigated. It is found that with the sulfuric acid concentration at 90%, reaction temperature at 180 ℃, liquid/solid ratio at 8∶1, heating time of 120 min, the extraction rate of alumina reached 90.23%. This process can be operated at atmospheric pressure, which will be of great significance for the exploitation and utilization of bauxite. |
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| Keywords: | bauxite diasporic bauxite low alumina-silica ratio sulfuric acid leaching alumina |
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