Abstract The water-filled pores have an observable influence on the flotation of porous minerals such as low-rank coal, zeolite, sepiolite, etc. This paper was to perform the fundamental study of pores wetting of the porous minerals using different hydrophobic active carbons as the samples combined with 1H low-field nuclear magnetic resonance (1H LF-NMR) and micro flotation tests. The relationship between wetting percentage measured by the 1H LF-NMR (WPL) and weighting (WPW) for hydrophilic and hydrophobic samples at different wetting times fitted the first-order linear curve, indicating that the 1H LF-NMR characterizing the pore wetting was feasible. The pores of hydrophilic and hydrophobic samples were quickly wetted during 0–10 min wetting, after that their wetting rates were significantly decreased. The micropores and transition pores in the samples of different hydrophobic were mainly wetted. Interestingly, models of total wetting percentages of different hydrophobic samples fitting to wetting times were both the classical first-order model of flotation kinetics. The flotation recoveries of hydrophilic and hydrophobic powder active carbons were gradually decreased at wetting time of 0–10 min, then those stay almost constant, which reflected the effects of pore wetting on the floatability of samples. This paper provides some potential guidance for porous mineral flotation.

中文翻译：

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活性炭孔隙润湿性与可浮性关系模型：对多孔矿物浮选的潜在指导

摘要 充水孔隙对低阶煤、沸石、海泡石等多孔矿物的浮选具有明显的影响。本文利用不同疏水性活性炭对多孔矿物的孔隙润湿进行基础研究。样品结合1H低场核磁共振（1H LF-NMR）和微浮选试验。亲水性和疏水性样品在不同润湿时间的 1H LF-NMR (WPL) 测得的润湿百分比与加权 (WPW) 之间的关系符合一阶线性曲线，表明 1H LF-NMR 表征孔隙润湿性是可行的. 亲水和疏水样品的孔隙在润湿 0-10 分钟后迅速润湿，之后润湿速率显着降低。不同疏水性样品中的微孔和过渡孔主要是润湿的。有趣的是，适合润湿时间的不同疏水样品的总润湿百分比模型都是浮选动力学的经典一级模型。亲水性和疏水性粉末活性炭的浮选回收率在 0-10 分钟的润湿时间逐渐下降，然后几乎保持不变，这反映了孔隙润湿对样品可浮性的影响。本文为多孔矿物浮选提供了一些潜在的指导。亲水性和疏水性粉末活性炭的浮选回收率在 0-10 分钟的润湿时间逐渐下降，然后几乎保持不变，这反映了孔隙润湿对样品可浮性的影响。本文为多孔矿物浮选提供了一些潜在的指导。亲水性和疏水性粉末活性炭的浮选回收率在 0-10 分钟的润湿时间逐渐下降，然后几乎保持不变，这反映了孔隙润湿对样品可浮性的影响。本文为多孔矿物浮选提供了一些潜在的指导。