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随着锰产业的迅锰发展,国内高品位锰矿逐渐枯竭,有必要探索锰矿尾矿资源化利用技术。实验采用电场强化锰矿尾矿的湿法浸出过程,并探索其强化机理。通过X射线衍射(XRD)、X射线荧光分析(XRF)、扫描电镜(SEM)以及紫外可见漫反射光谱(UV-vis DRS)等检测方法,分析了碳酸锰矿尾矿的结构和成分,以及浸出反应前后的物相变化行为,研究了强化浸出工艺条件。结果表明,电场可改变矿浆颗粒表面电荷分布,强化锰矿尾矿浸出过程。在电流密度为5 000 A/m2、液固比6∶1 m L/g、矿酸比为1∶0.7、温度为60℃、时间为1 h时,锰浸出率可达94.23%,与同等条件不加电场时相比提高18%,尾矿锰含量由4.33%降到0.14%。
With the rapid development of manganese in the manganese industry, the domestic high-grade manganese ore is gradually depleted. It is necessary to explore the resource utilization of manganese ore tailings. In the experiment, the wet leaching process of manganese ore tailing was strengthened by electric field and its strengthening mechanism was explored. The structure and composition of manganese carbonate tailings were analyzed by XRD, XRF, SEM and UV-vis DRS. The effects of leaching The phase behavior before and after the reaction was studied. The conditions of the leaching process were studied. The results show that electric field can change the charge distribution on the surface of pulp particles and strengthen the leaching process of manganese ore tailing. At the current density of 5 000 A / m2, the liquid-solid ratio of 6:1 m L / g, the ratio of mineral to acid of 1: 0.7, the temperature of 60 ℃ and the time of 1 h, the leaching rate of manganese reaches 94.23% The conditions increased by 18% compared with no electric field, tailings manganese content decreased from 4.33% to 0.14%.