中文摘要：

以沁水盆地中南部霍尔辛赫井田的不同煤体结构煤为研究对象,用盐酸（HCl）、醋酸（HAc）和氢氟酸（HF）对煤样进行酸化处理,并运用低温灰化和X射线衍射等方法,对酸改造前后煤样的质量变化率、煤-水接触角和表面张力进行测试计算分析.研究表明：盐酸和醋酸作用后煤样的质量变化率在0.1%左右,而氢氟酸作用后煤样的质量变化率却高达7%;不同酸的作用对象不同,氢氟酸可与煤中大部分无机矿物质发生反应,效果最为显著;盐酸酸化后,煤-水接触角由59.75°减小为33.25°,表面张力由54.42mJ/m^2增至66.45mJ/m^2,含水性增强;而醋酸和氢氟酸酸化后,煤-水接触角由59.75°分别增至85.00°和84.50°,表面张力由54.42 mJ/m^2分别减至39.34mJ/m^2和39.65mJ/m^2,疏水性增强;煤样经酸化处理后,煤-水接触角和表面张力变化明显.

英文摘要：

The coal samples with different deformed degrees, collected from Huoerxinhe coalmine in Qinshui coal basin were treated by the different acids, including hydrochloric acid （HCl）, acetic acid （HAc） and hydrofluoric acid （HF）. Mass change rate and coal-water contact angel were measured, and the surface tension was calculated by low temperature ashing and X-ray diffraction methods. The results show that the mass change rate of the coal is about 0. 1% by HCl or HAc treatment, while the mass change rate of the coal is 7% by HF treatment; the reaction objects are different for each acid, most of the minerals in the coal can react with HF, which is the most effective treatment method; after HCl treatment, the coal-water contact angel shows a obviously decreasing trend from 59.75°to 88.25°, but the surface tension increases from 54. 42 mJ/m^2 to 66.45 mJ/m^2 to cause a stronger wettability. After HAc and HF treatment, the coal-water contact angel shows a correspondingly increasing phenomenon from 59.75° to 85.00° and 84.50°, the surface tension decreases from 54.42 mJ/m^2 to ag. 34 mJ/m^2 and 39.65 mJ/m^2 respectively. In general, the water-coal contact cantly after the acid treatment. angel and surface tension of coal change signifi- KEYWORDS tectonic coal, acid treatment, contact angel, surface tension, wettability