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主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
极性-非极性复合捕收剂对氧化煤泥浮选效果试验研究
  • Title

    Experimental study on effect of flotation of oxidized coal with the use of polar-nonpolar compound collector

  • 作者

    于得水王鑫李大虎曾鹏郜美如

  • Author

    YU Deshui;WANG Xin;LI Dahu;ZENG Peng;GAO Meiru

  • 单位

    国家能源集团乌海能源有限公司内蒙古科技大学 矿业与煤炭学院宁夏百川科技有限公司国家能源集团宁夏煤业有限责任公司 煤制油分公司

  • Organization
    CHN Energy Wuhai Energy Co. Ltd.
    College of Mining and Coal, Inner Mongolia University of Science and Technology
    Ningxia Baichuan Technology Co. Ltd.
    Coal-To-Oil Branch, CHN Energy Ningxia Coal Industry Co. Ltd.
  • 摘要

    针对氧化煤泥浮选效果差、浮选精煤产率低且精煤灰分高,同时药剂消耗量大等难题,采用柴油与极性新型药剂KD混合作为复合捕收剂进行难浮氧化煤泥的浮选,并对复合捕收剂浮选过程中的入浮浓度、捕收剂用量、起泡剂用量以及复合捕收剂配比等参数进行了优化。同时,通过调控复合捕收剂及适量起泡剂的使用条件,对氧化煤泥的最优浮选效果进行试验探索。研究结果表明:极性-非极性复合捕收剂在氧化煤泥表面的吸附量显著高于柴油在氧化煤泥表面的吸附量,且氧化煤泥和复合捕收剂作用后,煤表面接触角增加、疏水性提高,极性-非极性复合捕收剂可大幅提升氧化煤泥浮选效果;精煤产率达75.06%,同时保持了较低的精煤灰分8.33%,浮选完善指标为50.89%,可燃体回收率提升至84.52%,显著提升了浮选效果。

  • Abstract

    The knotty problems in flotation of oxidized coal include low flotation efficiency, low yield and high ash of concentrate, and high consumption of agents, among others. To address this issue, a novel collector KD, a compound collector composed of mixed diesel and polar agent, is used and the feed concentration as well as the agent usage regime, such as dosages of collector and frother, and ratio of polar agent and diesel are optimized in the flotation process of the difficult-to-float coal. Besides, experimental study is conducted on the efficiency that can be expected in flotation of the coal with the use of KD at a ration of polar agent, and a proper dosage of frother. As revealed by study results, the adsorptive capacity of the polar-nonpolar compound collector on coal surface is far higher than diesel, and its adsorption can lead to increase of contact angle and hence increase of hydrophobicity of coal surface; and with the use of the compound collector, the flotation efficiency of oxidized coal is significantly improved as evidenced by a high yield of concentrate of 75.05%, a concentrate ash as low as 8.33%, a flotation perfect index of 50.89% and a recovery of combustible matter reaching 84.52% — a result attesting to significantly improved efficiency in flotation of such coal with the use of the compound collector.

  • 关键词

    浮选氧化煤泥复合捕收剂药剂制度浮选完善指标可燃体回收率

  • KeyWords

    flotation;oxidized coal slurry;compound collector;regime of agents;flotation perfect index;combustible recovery rate

  • 基金项目(Foundation)
    内蒙古自然科学基金项目(2023MS05007);内蒙古自治区直属高校基本科研业务费项目(2023QNJS100)
  • DOI
  • 引用格式
    于得水,王 鑫,李大虎,等. 极性-非极性复合捕收剂对氧化煤泥浮选效果试验研究[J]. 选煤技术,2024,52(6):15−21.
  • Citation
    YU Deshui, WANG Xin, LI Dahu, et al. Experimental study on effect of flotation of oxidized coal with the use of polar-nonpolar compound collector[J]. Coal Preparation Technology,2024,52(6):15−21.
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  • 图表
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    • 煤样FTIR检测结果

    图(7) / 表(3)

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