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硫铁矿尾矿活化焙烧-二次碱浸脱硅制备铝精矿

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冯雪茹, 刘述平, 李超. 硫铁矿尾矿活化焙烧-二次碱浸脱硅制备铝精矿[J]. 矿产综合利用, 2023, 44(4): 133-137, 143. doi: 10.3969/j.issn.1000-6532.2023.04.020
引用本文: 冯雪茹, 刘述平, 李超. 硫铁矿尾矿活化焙烧-二次碱浸脱硅制备铝精矿[J]. 矿产综合利用, 2023, 44(4): 133-137, 143. doi: 10.3969/j.issn.1000-6532.2023.04.020
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Feng Xueru, Liu Shuping, Li Chao. Aluminum Concentrate Prepared by Activated Roasting-Secondary Alkaline Leaching Desilication of Pyrite Tailings[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(4): 133-137, 143. doi: 10.3969/j.issn.1000-6532.2023.04.020
Citation: Feng Xueru, Liu Shuping, Li Chao. Aluminum Concentrate Prepared by Activated Roasting-Secondary Alkaline Leaching Desilication of Pyrite Tailings[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(4): 133-137, 143. doi: 10.3969/j.issn.1000-6532.2023.04.020
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硫铁矿尾矿活化焙烧-二次碱浸脱硅制备铝精矿

  • 中国地质科学院矿产综合利用研究所，四川　成都　610041

  • 基金项目: 中国地质调查局地质大调查项目（12120113086800）
详细信息
    作者简介: 冯雪茹（1990-），女，工程师，硕士研究生，研究方向为有色金属冶金

  • 中图分类号: TD951;TF821

Aluminum Concentrate Prepared by Activated Roasting-Secondary Alkaline Leaching Desilication of Pyrite Tailings

  • Institute of Multipurpose Utilization of Mineral Resources, CAGS, Chengdu, Sichuan, China

    摘要

  • 这是一篇冶金工程领域的论文。西南某地区硫铁矿选硫尾矿中的氧化铝含量高于46%，具有较高回收利用价值，但尾矿中的铝硅酸盐矿物中存在含量较高且晶体结构稳定的SiO2，导致尾矿的铝硅比（A/S）较低，仅为1.72。为了实现铝硅分离，制得铝精矿以回收利用该尾矿，通过活化焙烧使其中结构稳定的SiO2转变为非晶态SiO2，再使用NaOH溶液二次浸出焙砂脱硅制备得到铝精矿。结果表明：在焙烧时间35 min，焙烧温度1140 ℃，一次碱浸NaOH浓度140 g/L，浸出温度110 ℃，浸出时间30 min，浸出液固比16的适宜条件下，铝硅比（A/S）提高到4.11；在二次碱浸NaOH浓度140 g/L、浸出温度110 ℃、浸出时间30 min、浸出液固比10的较佳条件下，得到铝硅比（A/S）为5.11的铝精矿，为该尾矿的综合利用打下了良好的基础。

    This is an essay in the field of metallurgical engineering. Content of alumina in pyrite tailings in the southwest China is higher than 46%, and the alumina is of high recycling value. However, SiO2 with high content and stable crystal structure exists in aluminosilicate minerals in tailings, resulting in a low aluminosilicate ratio of Al2O3/SiO2 (A/S) of tailings, which is only 1.72. To realize the separation of aluminum and silicon, and obtain aluminum concentrate for recycling of the tailings, the SiO2 with stable structure is transformed into amorphous SiO2 by activated roasting. And then the calcine is leached twice with NaOH solution for desilicating to obtain the aluminum concentrate. The results show that under the optimum conditions of roasting time of 35 min, roasting temperature of 1140 ℃, the concentration of NaOH 140 g/L in primary alkaline leaching, leaching temperature of 110 ℃, leaching time of 30 min, the ratio of liquid to solid 16, the aluminum-silicon ratio (A/S) increases to 4.11. Under the optimum conditions of NaOH concentration 140 g/L in secondary alkaline leaching, leaching temperature 105 ℃, leaching time 30 min, and leaching liquid to solid ratio 10, the aluminum-silicon ratio (A/S) of 5.11 is obtained, which lays a good foundation for comprehensive utilization of the tailings.

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  • 图 1  焙烧时间对焙砂一次碱浸脱硅的影响

    Figure 1. 

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    图 2  焙烧温度对焙砂一次碱浸脱硅的影响

    Figure 2. 

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    图 3  浸出时间对焙砂一次碱浸脱硅的影响

    Figure 3. 

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    图 4  浸出温度对焙砂一次碱浸脱硅的影响

    Figure 4. 

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    图 5  浸出剂NaOH浓度对焙砂一次碱浸脱硅的影响

    Figure 5. 

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    图 6  浸出液固比对脱硅的影响

    Figure 6. 

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    表 1  硫铁矿尾矿化学多项分析结果/%

    Table 1.  Chemical multinomial analysis results of pyrite tailings

    Al2O3SiO2TiO2TFeSMgOCaOSc2O3*TREO*Ga*Nb*
    46.4026.945.171.110.750.400.7341.4963607171
    *单位为g/t。
    下载: 导出CSV

    表 2  硫铁矿尾矿的重要物相组成及含量/%

    Table 2.  Important phase composition and content of pyrite tailings

    叶腊石
    		绿泥石高岭石一水硬铝石三水铝石锐钛矿黄铁矿海泡石云母石英石墨文石石膏板铁矿
    41.90.611.220.84.54.61.50.67.91.70.40.4-1.1
    下载: 导出CSV

    表 3  焙砂一次碱浸脱硅产物成分/%

    Table 3.  Composition of desilication products from primary alkaline leaching of calcine

    Al2O3SiO2TiO2CaOFeSTREO*Sc2O3*Ga*Nb*
    63.6115.477.401.081.660.1014206187.9251
    *单位为 g/t。
    下载: 导出CSV

    表 4  二次碱浸脱硅产物主要化学成分/%

    Table 4.  Main chemical composition of secondary alkaline leaching desilication products

    Al2O3SiO2TiO2CaOFeSTREO*Sc2O3*Ga*Nb*
    68.3713.398.211.221.850.0515726696279
    *单位为 g/t。
    下载: 导出CSV

    表 5  二次碱浸脱硅溶液及洗液的主要化学成分/（g/L）

    Table 5.  Main chemical components of secondary alkaline leaching desilication solution and lotion

    Al2O3SiO2NaOHGa*Sc*Nb*TREO*
    浸出液1.303.40141.60.120.01<0.010.01
    洗液0.511.4551.200.0650.01<0.010.01
    *单位为 mg/L。
    下载: 导出CSV
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收稿日期:  2022-06-15
刊出日期:  2023-08-25

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