發(fā)布時間：2018-12-14 03:32

【摘要】：針對礦粉接觸角測定試驗中條件非標準化導致的試驗結(jié)果重復(fù)性差、復(fù)現(xiàn)性差,及部分礦粉接觸角無法測得的問題,根據(jù)試驗原理并結(jié)合試驗現(xiàn)象,對粉體柱密實度、濾紙層數(shù)及其包裹高度、浸漬液體選擇等外因?qū)ΦV粉接觸角試驗的影響進行了試驗研究.研究表明:粉體柱的密實程度對礦粉接觸角的離散性影響顯著,密實度越穩(wěn)定接觸角離散性越小;玻璃管底部濾紙包裹層數(shù)及包裹高度、以及浸漬液體的選擇等外因,對能否測得礦粉接觸角有直接影響,并且對粒徑較大的礦粉影響尤為顯著;礦粉粒徑越大,玻璃管底部需要包裹濾紙層數(shù)越多;玻璃管底部包裹濾紙的頂面需高出液面,選擇表面能參數(shù)分量中色散分量非零的極性液體,以確保順利測出粉體的接觸角.
[Abstract]:Aiming at the problems of poor repeatability and poor reproducibility of the test results caused by the condition non-standardization in the measurement of contact angle of mineral powder, and the problems that some contact angles of mineral powder cannot be measured, the compactness of powder column is studied according to the principle of test and combined with the experimental phenomenon. The influence of external factors such as the number of filter paper layer and its wrapping height and the selection of impregnated liquid on the contact angle test of mineral powder was studied. The results show that the density degree of powder column has a significant effect on the dispersion of contact angle, and the more stable the density, the smaller the dispersion of contact angle. The outer factors such as the number and height of the filter paper at the bottom of the glass tube and the choice of the impregnated liquid have a direct effect on the measurement of contact angle of ore powder, especially on the ore powder with larger particle size. The larger the particle size of mineral powder, the more the number of filter paper layers need to be wrapped at the bottom of glass tube, and the top surface of the filter paper should be higher than liquid level, and the polar liquid with non-zero dispersion component in the component of surface energy parameters should be selected to ensure the smooth measurement of contact angle of powder.
【作者單位】： 交通土建工程材料國家地方聯(lián)合實驗室(重慶交通大學);重慶交通大學土木工程學院;中國石油大學(華東)化學工程學院;
【基金】：國家自然科學基金(51508062)
【分類號】：U416.2
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本文編號：2377835