Optimization of collector and its action mechanism in lignite flotation
Optimization of collector and its action mechanism in lignite flotation
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褐煤浮选捕收剂及其作用机理优化
DOI：
10.1016/j.powtec.2019.01.011
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发表时间：
2019-03-01
影响因子：
5.2
通讯作者：
Jiang, Zhendong
中科院分区：
文献类型：
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作者：
Cheng, Gan;Li, Ziyou;Jiang, Zhendong
即使使用高剂量的捕收剂，褐煤的浮选性能也很差。本文以内蒙古霍林河煤田褐煤为研究对象，采用近似分析、粒度分析和傅里叶变换红外光谱对其理化性质进行了测定。研究了6种捕收剂对褐煤的浮选性能。并比较了两种乳化捕收剂对褐煤浮选效果的影响。发现捕收剂结构中的极性基团有助于改善褐煤的浮选，将诱导时间缩短至15 ms，仅为传统捕收剂（柴油190 ms）的1/12。诱导时间顺序为柴油>煤油>乳化煤油>乳化柴油> C1（其中一种无名捕收剂），与浮选性能一致。C1和乳化捕收剂通过促进粗煤（-500 + 250 μ m）的浮选，显著改善了褐煤的浮选性能。(C) 2019 Elsevier B.V.版权所有。
The flotation performance of lignite is poor even if a high dosage of the collector is used. In this work, the lignite in the Huolinhe Coalfield of Inner Mongolia was used, and its physicochemical properties were determined by proximate analysis, particle size analysis and Fourier transform infrared spectroscopy. The flotation performances of lignite using six collectors were investigated. Moreover, the flotation responses of lignite with combined collector and two emulsified collectors were compared. It was found that the polar groups in the collector structure were helpful to improve the flotation of lignite through reducing the induction time to 15 ms, only 1/12 of that of the traditional collector (190 ms for diesel). The induction time was in the order of diesel> kerosene> emulsified kerosene> emulsified diesel> C1 (one of the nameless collectors), consistent with the flotation performance. C1 and emulsified collectors significantly improved the flotation performance of lignite by promoting the floating of coarse coal (-500 + 250 mu m). (C) 2019 Elsevier B.V. All rights reserved.