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通过对水相中细粒煤电动电位的研究，认为水相中表面荷负电的煤颗粒，其电性受ｐＨ值和某些化学药剂的影响比较大，且呈现出规律性变化。利用化学平衡和有关的吸附理论对此进行了理论探讨，并作出了合理的解释。
By studying the electromotive potential of fine coal in water phase, it is considered that the coal particles charged negatively on the surface of water phase are influenced by pH value and some chemical agents, and exhibit regular changes. The chemical equilibrium and the related adsorption theory are used to discuss this theory and make a reasonable explanation.