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不同碱浸工艺处理氧化锌矿的对比研究

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袁杰, 陈媛媛, 周明芹, 龚光倩. 不同碱浸工艺处理氧化锌矿的对比研究[J]. 矿产综合利用, 2022, 43(4): 65-70. doi: 10.3969/j.issn.1000-6532.2022.04.012
引用本文: 袁杰, 陈媛媛, 周明芹, 龚光倩. 不同碱浸工艺处理氧化锌矿的对比研究[J]. 矿产综合利用, 2022, 43(4): 65-70. doi: 10.3969/j.issn.1000-6532.2022.04.012
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Yuan Jie, Chen Yuanyuan, Zhou Mingqin, Gong Guangqian. Different Treatments of Zinc Oxide Ore in Caustic Leaching Process[J]. Multipurpose Utilization of Mineral Resources, 2022, 43(4): 65-70. doi: 10.3969/j.issn.1000-6532.2022.04.012
Citation: Yuan Jie, Chen Yuanyuan, Zhou Mingqin, Gong Guangqian. Different Treatments of Zinc Oxide Ore in Caustic Leaching Process[J]. Multipurpose Utilization of Mineral Resources, 2022, 43(4): 65-70. doi: 10.3969/j.issn.1000-6532.2022.04.012
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不同碱浸工艺处理氧化锌矿的对比研究

  • 六盘水师范学院化学与材料工程学院，贵州　六盘水　553004

  • 基金项目: 国家自然科学基金青年基金(51904150)；贵州省科技计划项目(黔科合基础[2020]1Y225)；贵州省普通高等学校科技拔尖人才项目(黔教合KY字[2019]056)；六盘水市科技计划项目(52020-2018-0304、52020-2019-05-09)；六盘水师范学院科技创新团队(LPSSYKJTD201801、LPSSYKJTD201905)；六盘水师范学院重点学科建设项目(LPSSYZDPYXK201708)；卓越工程师培养计划项目(LPSSYzyjypyjh201801)
详细信息
    作者简介: 袁杰（1985-），男，博士，副教授，从事冶金固废资源化利用研究

  • 中图分类号: TD989;TF813

Different Treatments of Zinc Oxide Ore in Caustic Leaching Process

  • Liupanshui Normal University, Liupanshui, Guizhou, China

    摘要

  • 氧化锌矿资源化利用是当前锌冶炼行业重要关注点。通过超声波辅助和常规机械搅拌碱浸处理氧化锌矿对比实验，考查实验因素温度、时间、初始碱浓度、超声波功率/搅拌速率等对锌浸出率的影响。结果表明，超声波辅助浸出效果优于常规浸出，在较优实验参数超声波功率400 W、温度65℃、时间40 min、初始碱浓度4 mol/L、液固比10∶1下重复实验，Zn平均浸出率为91.62%。超声波辅助浸出可大幅缩短反应时间。超声波在浸出提取锌的过程中发挥重要作用。

    Resource recycling of Zinc oxide ore is an important concern in zinc smelting industry at present. In this study, comparison of ultrasonic-assisted and traditional treatment of zinc oxide ore with caustic leaching process was investigated. Effects of experimental factors temperature, time, initial alkali concentration, ultrasonic power, and agitation rate, on zinc leaching rate, were examined. Results showed that zinc leaching rate of ultrasonic assisted process was better than that of traditional process. The optimal parameters were ultrasonic power of 400 W, temperature of 65℃, time of 40 min, initial alkali concentration of 4 mol/L, and liquid to solid ratio of 10∶1, and the average leaching rate of zinc under optimal conditions was 91.62%. Ultrasonic-assisted leaching can shorten the reaction time greatly. Ultrasonic played a notable effect in zinc oxide ore leaching process.

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  • 图 1  Zn(II)-H2O系E-pH (298K，锌离子活度=1)

    Figure 1. 

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    图 2  反应时间对锌浸出率的影响

    Figure 2. 

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    图 3  温度对锌浸出率的影响

    Figure 3. 

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    图 4  初始碱浓度对锌浸出率的影响

    Figure 4. 

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    图 5  超声波功率和搅拌速率对锌浸出率的影响

    Figure 5. 

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    图 6  综合实验结果

    Figure 6. 

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    表 1  氧化锌矿元素分析/%

    Table 1.  Ultimate analysis of zinc oxide ore

    ZnFeCaAlCdMnSiOS
    9.721.034.511.171.8410.283.0226.445.21
    下载: 导出CSV

    表 2  原料中锌物相分析/%

    Table 2.  Zinc phase distributions of sample

    物相ZnOZnCO3Zn2SiO4其他总量
    锌含量2.523.413.430.369.72
    下载: 导出CSV

    表 3  Zn(II)-H2O系主要反应E-pH计算结果(298 K)

    Table 3.  E-pH of main reactions in Zn(II)-H2O system (298 K)

    序号反应方程电势E/pH方程
    ①Zn2+ + 2e = ZnE = −0.7658 + 0.02958 lg aZn2+
    ②Zn2+ + 2H2O = Zn(OH)2(s) + 2H+pH = 6.1703 + 0.5 lg aZn2+
    ③Zn(OH)2(s) + 2H+ + 2e = Zn + 2H2OE = −0.4007 − 0.0591pH
    ④ZnO22− + 2H+ = Zn(OH)2(s)pH = 14.258 + 0.5lg aZnO2-2
    ⑤ZnO22− + 4H+ + 2e = Zn + 2H2OE = 0.4429 + 0.02958lgaZn2+ − 0.1183pH
    ⑥2H+ + 2e = H2OE = −0.0591pH
    ⑦O2 + 4H+ + 4e = 2O2−E = 1.229 − 0.0591pH
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    • 参考文献(8)
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收稿日期:  2020-08-06
刊出日期:  2022-08-25

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