尾矿及其浸出液中重金属形态分析与评价
发布时间：2018-08-21 09:58
【摘要】：以人工添加重金属的钼尾矿为研究对象,采用BCR连续浸提法和TCLP浸出试验相结合的方法,研究尾矿中重金属的形态分布和浸出能力。结果表明,尾矿中重金属存在形式弱酸态和还原态总和均在90%以上,在合适的条件下很容易浸出;在pH 2.88的醋酸中浸提45 h,液固比大于80∶1 L/g时,重金属浸出率较大,而浸提温度、滤膜直径、振荡方式对重金属浸出率的影响因重金属的不同而有所不同,静置时间对重金属的浸出率影响可以忽略不计。
[Abstract]:Taking molybdenum tailings with artificial heavy metals as the research object, the form distribution and leaching ability of heavy metals in tailings were studied by combining BCR continuous extraction method with TCLP leaching test. The results show that the sum of weak acid state and reduction state of heavy metals in tailings is more than 90%, which is easy to be leached under suitable conditions, and the leaching rate of heavy metals is higher when the ratio of liquid to solid is more than 80:1 L / g for 45 h in acetic acid at pH 2.88. However, the influence of extraction temperature, filter membrane diameter and oscillation mode on the leaching rate of heavy metals varies with different heavy metals, and the influence of static time on the leaching rate of heavy metals can be neglected.
【作者单位】： 北京建筑材料科学研究总院固废资源化利用与节能建材国家重点实验室;内蒙古科技大学能源与环境学院;河北建筑工程学院能源与环境工程学院;
【基金】：北京市科委计划项目(Z151100004915008) 内蒙古自治区自然科学基金项目(2016MS0222)
【分类号】：X751;X82
，
本文编号：2195352
[Abstract]:Taking molybdenum tailings with artificial heavy metals as the research object, the form distribution and leaching ability of heavy metals in tailings were studied by combining BCR continuous extraction method with TCLP leaching test. The results show that the sum of weak acid state and reduction state of heavy metals in tailings is more than 90%, which is easy to be leached under suitable conditions, and the leaching rate of heavy metals is higher when the ratio of liquid to solid is more than 80:1 L / g for 45 h in acetic acid at pH 2.88. However, the influence of extraction temperature, filter membrane diameter and oscillation mode on the leaching rate of heavy metals varies with different heavy metals, and the influence of static time on the leaching rate of heavy metals can be neglected.
【作者单位】： 北京建筑材料科学研究总院固废资源化利用与节能建材国家重点实验室;内蒙古科技大学能源与环境学院;河北建筑工程学院能源与环境工程学院;
【基金】：北京市科委计划项目(Z151100004915008) 内蒙古自治区自然科学基金项目(2016MS0222)
【分类号】：X751;X82
，
本文编号：2195352
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