摘要:
基于8个洗煤厂实采煤样的测试分析以及2个煤样的模拟洗选实验，对煤炭洗选过程中灰分、硫分及20种有害微量元素的脱除率进行了研究，并系统地探讨了这些有害元素的洁净潜势。结果表明：物理洗选不但能降低煤中的灰分与硫分，还能不同程度地脱除煤中有害微量元素；预测在物理洗选过程中，多数煤中灰分以及有害微量元素As、Co、Cu、Cr、Hg与Mn的脱除率大于50％，硫分的脱除率大于30％，其它有害微量元素Ba、Be、Cd、Cl、Mo、Ni、P、Pb、Sb、Se、Th、U、V与Zn的脱除率相对较低或表现出一个宽的变化范围。
关键词:
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煤 /
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有害元素 /
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洁净潜势 /
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洗选
Abstract:
Based on the analysis of 8 samples of raw and cleaned coal collected from 4 coal-washing plants and the results of simulated coal cleaning experiments for 2 raw coals, removability of ash, sulfur and 20 hazardous trace elements in these samples during coal cleaning were studied. Combined with the previous works, cleaning potential of the hazardous elements were systematically discussed. The results suggested that physical coal cleaning was not only a mature technology as applied to the removal of ash and sulfur, but also effective in reducing the concentration of hazardous trace elements in varying degrees. It was anticipated that more than 50% of ash and the hazardous elements As, Co, Cr, Cu, Hg, Mn and more than 30% of sulfur in most coal would be routinely removed by physical coal cleaning procedures, however, the removability of other hazardous elements Ba, Be, Cd, Cl, Mo, Ni, P, Pb, Sb, Se, Th, U, V and Zn displayed relatively lower or a wide range of variation.
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