| 拜尔法处理广西不同地区铝土矿适用性研究 |
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| 引用本文： | 陈燕清,蒋奇亮. 拜尔法处理广西不同地区铝土矿适用性研究[J]. 矿产保护与利用, 2018, 0(2): 95-100. DOI: 10.13779/j.cnki.issn1001-0076.2018.02.018 |
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| 作者姓名： | 陈燕清 蒋奇亮 |
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| 作者单位： | 广西地质矿产测试研究中心，广西 南宁 530023 |
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| 基金项目： | 国土资源部项目《全国矿产资源利用现状调查（广西部分）》资助1212011220875 |
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| 摘 要： | 拜尔法生产氧化铝是一水硬铝石型铝土矿提取铝行之有效的方法，通过对广西4个不同地区的铝矿石进行拜尔法的溶出处理试验研究判断其可行性。试验结果表明:拜尔法处理这4个不同性质特征铝矿石生产氧化铝的适用性较强，溶出温度为260~280℃、溶出时间为45~60 min、配料分子比为1.40~1.45、石灰加入量为4%~9%、循环苛性碱浓度为240~280 g/L，在此条件范围内这4个铝土矿石的相对溶出率都达到95%以上，添加聚丙烯酰胺絮凝剂有助于提高溶出赤泥的沉降性能。
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| 关 键 词： | 铝矿石 拜尔法 聚丙烯酰胺 絮凝沉降 浮选 |
| 收稿时间： | 2018-01-20 |
Research on the Applicability of Bayer Method for Bauxite in Different Areas of Guangxi Province |
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| Affiliation: | Guangxi geological mineral Test Research Center, Nanning 530023, China |
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| Abstract: | The production of alumina by Bayer process is an effective method to extract aluminum from diaspore. The feasibility of using Bayer process to dissolve aluminum ore in four different areas of Guangxi was studied. The results showed that the Bayer process was suitable for the production of alumina from four different kinds of aluminum ore. The optimal dissolution temperature was 260~280℃, the leaching time was 45~60 min, the molecular weight ratio was 1.40~1.45, the dosage of lime was 4%~9%, and the circulating caustic concentration was 240~280 g/L. Under these conditions, the relative leaching rates of these four bauxite ores reached more than 95%. Moreover, the addition of polyacrylamide as the flocculent was helpful to improve the sedimentation performance of the dissolved red mud. |
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