表面活性剂在煤泥浮选领域中应用广泛，且表面活性剂常被用于煤泥浮选促进剂，本文从另一个方面探究了表面活性剂在过量的情况下对煤泥浮选的抑制效应及其机理。以低灰煤粒和表面活性剂曲拉通X-100为研究对象，采用X射线光电子能谱(XPS)表征曲拉通X-100在煤表面的吸附状态，静态接触角测定仪测定曲拉通X-100对煤表面疏水性的影响，并探究了不同质量浓度曲拉通X-100液滴在煤粒表面的润湿与铺展情况，采用诱导时间测量仪分析不同质量浓度曲拉通X-100水溶液中的气泡与煤粒的黏附情况，最后通过紫外分光光度计定量表征浮选槽中残留曲拉通X-100质量浓度与不同浮选时间下浮选结果的对应关系。结果表明:高质量浓度曲拉通X-100会抑制煤粒上浮，随着浮选试验的进行，曲拉通X-100质量浓度逐渐降低，低质量浓度曲拉通X-100会促进煤粒被上浮气泡黏附而浮出;高质量浓度曲拉通X-100能够在煤粒表面发生有效吸附，该吸附属于物理吸附，且在一定程度上提高了煤表面的疏水性;高质量浓度曲拉通X-100水溶液更容易润湿煤表面，从而减缓了气泡-煤粒黏附过程中的液膜薄化与破裂速率;在高质量浓度曲拉通X-100水溶液中，气泡表面因罩盖有曲拉通X-100分子，导致气泡表面发生改性，难以与煤粒发生有效黏附。高质量浓度曲拉通X-100主要通过对气泡改性，以及减缓气泡与煤粒碰撞-黏附过程中的液膜薄化-破裂速率来抑制煤粒的浮选。

In view of the extensive application of surfactants in coal flotation,and the surfactants are usually used as promotors in coal flotation. This paper,from another aspect,explores the inhibition effect and mechanism of surfactant on coal flotation under the condition of its excess usage. Using low-ash coal grains and surfactant traverton X-100 as the research object,the adsorption state of travertine X-100 on the coal surface was characterized by X-ray photoelec- tron spectroscopy (XPS),and the static contact angle meter was used to measure the effect of traverton X-100 on the hydrophobicity of coal surface as well as the wetting and spread of different concentrations of travertine X-100 droplets on the surface of coal particles. Induction time measuring instrument was used to analyze the adhesion of bubbles and coal particles in the X-100 aqueous solution of travertine at different con-centrations. Finally,the ultraviolet spectro- photometer was used to quantify the relationship between residual trav-ersing X-100 concentration and the flotation re- sults under various flotation times in flotation cell. The results showed that the high concentration of Triton X-100 will inhibit the coal particles collected and floated by the rising bubble. As the flotation test proceeds,the concentration of Triton X-100 in the flotation cell will gradually decrease,and the low concentration of Triton X-100 will cause the coal particles to be easily floated with the rising bubbles. The high concentration of traverton X-100 could be effective- ly adsorbed on the surface of coal,and the adsorption belongs to physical adsorption. The hydrophobicity of coal sur- face was improved to a certain extent. The high concentration of the travertine X-100 aqueous solution is more condu- cive to wet the coal surface,which slows down the film thinning and cracking rate during the bubble-coal particle ad- hesion process. In a high-concentration travertine X -100 aqueous solution,the surface of the bubble is covered by travertine X-100 molecules,resulting in the modification of the bubble and making it more difficult to effectively ad- here to the coal particles. High con-centration Triton X-100 inhibiting the flotation of coal particles is mainly caused by modifying the bubbles and weakening the film thinning and cracking rate during the bubble-coal particle adhesion process.