Reverse flotation of non-coking coal fines using non-ionic surfactant triton X-100 as depressant
Reverse flotation of non-coking coal fines using non-ionic surfactant triton X-100 as depressant
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DOI：
10.1016/j.colsurfa.2020.125794
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
Kang Zheng;W. Xia;Wenjun Zhang
中科院分区：
文献类型：
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作者：
Kang Zheng;W. Xia;Wenjun Zhang
研究了Triton X-100（TX-100）表面活性剂在非炼焦煤粉反浮选中的应用。采用傅里叶变换红外光谱仪、接触角仪和诱导时间仪分析了高浓度TX-100抑制煤粒上浮的机理。FTIR结果表明，TX-100在煤表面发生了物理吸附。接触角结果表明，较高浓度的TX-100水溶液更容易润湿TX-100处理过的煤表面，减缓了气泡-煤粘附过程中膜的减薄和破裂速率。在高浓度TX-100水溶液中，气泡表面被TX-100分子覆盖，使气泡难以粘附在煤颗粒上。诱导时间结果表明，随着TX-100浓度的增加，煤粒与气泡的粘附概率逐渐减小。
A novel approach to apply Triton X-100 (TX-100) surfactant as depressant in reverse flotation of non-coking coal fines, which is different from the conventional use of dextrin as an depressant. Fourier transformed infrared spectroscopy (FTIR), contact angle and induction time instruments were used to analyze the mechanism of high-concentration TX-100 depressing the floating of coal particle. FTIR results revealed that TX-100 could physically adsorb on the surface of coal. Contact angle results showed the higher concentration of TX-100 aqueous solution was more likely to wet the surface of TX-100-treated coal, slowing down the film thinning and rupture rate during bubble-coal adhesion. In high-concentration TX-100 aqueous solution, the bubble surface was modified by the coverage of TX-100 molecules, which makes bubble difficult to adhere to coal particle. Induction time results showed the adhesion probability of coal particle and bubble gradually decreases with the increase of TX-100 concentration.