使用较早叙述过的作了改进的气体色谱法,对重晶石/十四烷基氯化铵和重晶石/油酸体系的表面自由能的变化作了研究。重晶石的表面由于溶剂的蒸发而被捕收剂所复盖。用气体色谱法测定 n-辛烷和 n-丙醇在重晶石表面的等温吸附线。推断 p/p_s=1为膜压值π_(max)可根据吸附等温线对纯净和(被捕收剂)复盖的重晶石表面进行测定。固体色散表面自由能可根据 n-辛烷的π_(max)值来计算,当然,先根据求得的色散分量计算。计算是以 Fowkes 的理论为依据.根据假设和讨论不同的润湿过程模型,测定表面自由能色散和极性分量的变化。可以观察到纯净的和复盖的重晶石表面的润湿机理的变化。然后,气相色谱法数据(主要是极性能量变化)与复盖着被试验捕收剂的重晶石的可浮性相比较。在实验室充气式浮选槽中进行浮选试验。极性自由能值的变化与所研究的体系的可浮性变化相一致。 Changes in free energy of the surface of barite / tetradecyl ammonium chloride and barite / oleic acid systems were investigated using improved gas chromatography as described earlier. The barite surface is covered by the collector due to the evaporation of the solvent. Determination of isobaric adsorption of n-octane and n-propanol on barite by gas chromatography. It is inferred that p / p_s = 1 is the membrane pressure value π_ (max) The barite surface covered by pure and (collector) can be determined by the adsorption isotherm. The free surface energy of the solid dispersion can be calculated based on the π_ (max) value of n-octane, of course, based on the calculated dispersion. The calculation is based on Fowkes’ theory, and based on the assumption and discussion of different wetting process models, the variation of the surface free energy dispersion and polar components is determined. Changes in the wetting mechanism of pure and covered barite surfaces can be observed. Gas chromatographic data (mainly changes in polar energy) were then compared with the floatability of barite covered with the tested collector. Flotation experiments were conducted in a laboratory inflatable flotation cell. The change in polar free energy values ​​is consistent with the change in floatability of the system under study.