煤体表面粗糙度对非阳离子表面活性剂润湿性影响的实验研究
Experimental study on the influence of coal surface roughness on wettability of non-cationic surfactants
-
摘要: 在水中加入非阳离子表面活性剂可有效增强水对煤体表面的润湿性，煤体表面的润湿性受溶液种类和煤体表面物理化学性质影响。为研究煤体粗糙度对表面润湿性的影响，采用5种不同表面粗糙度的型煤和5种非阳离子表面活性剂，使用SJ-210表面粗糙度测量仪、JC2000D型动态接触角测量仪等设备进行实验，分别计算了各溶液润湿型煤的表面能。结果表明：型煤表面粗糙度介于0.5～5 μm之间，非阳离子表面活性剂溶液在型煤表面形成的接触角与型煤表面粗糙度呈负相关，型煤表面能与表面粗糙度呈正相关；非阳离子表面活性剂质量分数0.01%时，型煤表面粗糙度对脂肪醇聚氧乙烯醚润湿性的影响程度最大，质量分数0.05%时，对癸基葡萄糖苷影响最大，质量分数0.10%时，对十二烷基硫酸钠影响最大，质量分数0.20%时，对脂肪醇聚氧乙烯醚羧酸钠影响最大，质量分数0.40%时，对癸基葡萄糖苷影响最大；质量分数越低的表面活性剂润湿性受型煤表面粗糙度影响越大，在实验室使用低质量分数表面活性剂溶液对型煤进行润湿实验时，控制型煤的表面粗糙度具有重要意义。Abstract: Adding non-cationic surfactant in water can effectively enhance the wettability of water on coal surface, and the wettability of coal surface is affected by the type of solution and the physical and chemical properties of coal surface. In order to study the influence of the roughness of the surface wettability of coal, five types of coal with different surface roughness and 5 non-cationic surfactants, SJ-210 surface roughness measuring instrument, JC2000D dynamic contact angle measuring instrument and other equipment were used for experiments, the surface energy of briquette wetted by each solution was calculated. The results show that the briquette surface roughness is in the range of 0.5 μm to 5 μm. The contact angle formed by non-cationic surfactant solution on briquette surface is negatively correlated with the briquette surface roughness, and the briquette surface energy is positively correlated with the briquette surface roughness; when the mass fraction of non-cationic surfactant is 0.01%, the surfaceroughness of briquette has the greatest influence on the wettability of fatty alcohol polyoxyethylene ether; when the mass fraction is 0.05%, it has the greatest influence on decyl glucoside; when the mass fraction is 0.10%, it has the greatest influence on sodium dodecyl sulfate; when the mass fraction is 0.20%, the surface roughness of briquette has the greatest influence on the wettability of fatty alcohol polyoxyethylene ether. When the mass fraction was 0.40%, it had the greatest influence on decyl glucoside; the wettability of surfactant with lower mass fraction is more affected by briquette surface roughness. It is of great significance to control briquette surface roughness by using low-concentration surfactant solution to conduct briquette wettability experiment in laboratory.
-
Keywords:
- coal surface roughness /
- non-cationic surfactant /
- contact angle /
- wettability /
- surface energy /
- dust control
-
-
[1] 解兴智，傅贵．煤润湿性测量方法的探讨[J]．煤炭科学技术，2004，32（2）：65－68. XIE Xingzhi, FU Gui. Discussion on coal wetability measuring method[J]. Coal Science and Technology, 2004, 32（2）: 65-68.
[2] 彭亚，蒋仲安，付恩琦，等.综采工作面煤层注水防尘优化及效果研究[J].煤炭科学技术，2018，46（1）：224-230. PENG Ya, JIANG Zhong’an, FU Enqi, et al. Study on seam water injection and dust control optimization and effect of fully-mechanized coal mining face[J]. Coal Science and Technology, 2018, 46（1）: 224-230.
[3] SUN Jian, ZHOU Gang, WANG Cunmin, et al. Experimental synthesis and performance comparison analysis of high-efficiency wetting enhancers for coal seam water injection[J]. Process Safety and Environmental Protection, 2021, 147: 320-333. [4] YAO Qingguo, XU Cuicui, ZHANG Yansong, et al. Micromechanism of coal dust wettability and its effect on the selection and development of dust suppressants[J]. Process Safety and Environmental Protection, 2017, 111: 726-732.
[5] 程卫民，周刚，陈连军，等.我国煤矿粉尘防治理论与技术20年研究进展及展望[J].煤炭科学技术，2020（2）：1-20. CHENG Weimin, ZHOU Gan, CHEN Lianjun, et al. Research progress and prospect of dust control theory and technology in China’s coal mines in the past 20 years[J]. Coal Science and Technology, 2020（2）: 1-20.
[6] LIU Zongqi, ZHOU Gang, LI Shuailong, et al. Molecular dynamics simulation and experimental characterization of anionic surfactant: influence on wettability of low-rank coal[J]. Fuel, 2020, 279（1-2）: 118323. [7] 苟尚旭，刘荣华，王鹏飞，等.表面活性剂对煤的润湿性影响[J].矿业工程研究，2016，31（4）：24-27. GOU Shangxu, LIU Ronghua, WANG Pengfei, et al. Infiltration experiment of surfactant on coal[J]. Mineral Engineering Research, 2016, 31 （4）: 24-27.
[8] 李娇阳，陆银平，赵一星.表面活性剂对煤润湿性的改性实验[J].煤炭技术，2016，35（8）：189-191. LI Jiaoyang, LU Yinping, ZHAO Yixing. Modification experiment of surfactant on coal wettability[J]. Coal Technology, 2016, 35（8）: 189-191.
[9] 安文博，王来贵.表面活性剂作用下煤体力学特性及改性规律[J].煤炭学报，2020，45（12）：4074-4086. AN Wenbo, WANG Laigui. Study on the mechanical properties and modification of coal under the action of surfactan[J]. Journal of China Coal Society, 2020, 45（12）: 4074-4086.
[10] 李皓伟，王兆丰，岳基伟，等.不同类型表面活性剂对煤体的润湿性研究[J].煤矿安全，2019，50（3）：22. LI Haowei, WANG Zhaofeng, YUE Jiwei, et al. Study on wettability of coal by different surfactants[J]. Safety in Coal Mines, 2019, 50（3）: 22.
[11] XIE Hongchao, NI Guanhua, XIE Jingna, et al. The effect of SDS synergistic composite acidification on thechemical structure and wetting characteristics of coal[J]. Powder Technology, 2020, 367: 253-265. [12] JIANG Yidan, WANG Pengfei, LIU Ronghua, et al. An experimental study on wetting of coal dust by surfactant solution[J]. Advances in Materials Science and Engineering, 2020（8）: 1-13. [13] 陈跃，马东民，夏玉成，等.低阶煤不同宏观煤岩组分润湿性及影响因素研究[J].煤炭科学技术，2019，47（9）：97-104. CHEN Yue, MA Dongmin, XIA Yucheng, et al. Study on wettability and influencing factors of different macroscopiccomponents in low rank coal[J]. Coal Science and Technology, 2019, 47（9）: 97-104.
[14] 王亮，廖晓雪，查梦霞，等.基于主成分分析法的松软煤体煤尘润湿特性研究[J].煤炭科学技术，2020，48（2）：104-109. WANG Liang, LIAO Xiaoxue, CHA Mengxia, et al. Study on wetting characteristics of coal dust in soft coal basedon principal component analysis[J]. Coal Science and Technology, 2020, 48（2）: 104-109.
[15] 蒋华义，刘梅，齐红媛，等.三种钢基疏水表面微观形貌的分形特征及其对润湿性的影响[J].高等学校化学学报，2020，41（6）：1313-1319. JIANG Huayi, LIU Mei, JI Hongyuan, et al. Ractal characteristics of the microstructures of three hydrophobicsurfaces with steel substrate and their effects on wettability[J]. Chemistry Journal of Chinese Universities, 2020, 41（6）: 1313-1319.
[16] 韩文梅，杨文博，李建军，等.煤系地层砂岩抛光面粗糙度和粒度分析[J].太原理工大学学报，2019，50（3）：286-290. HAN Wenmei, YANG Wenbo, LI Jianjun, et al. Analysis of roughness and granularity of sandstone polished surface in coal measure strata[J]. Journal of Taiyuan University of Technology, 2019, 50（3）: 286-290.
[17] 苏星.基于接触线理论的润湿性影响因素探究[D].厦门：厦门大学，2018. [18] EXTRAND C W. A thermodynamic model for wetting free energies from contact angles[J]. Langmuir, 2003, 19（3）: 646-649. [19] Robert N Wenzel. Resistance of solid surfaces to wetting by water[J]. Industrial ＆ Engineering Chemistry, 1936, 8（28）: 988-994. [20] 刘敏，张友飞，郭芳余，等.表面粗糙度对煤泥可浮性的影响[J].煤炭科学技术，2019，47（10）：253. LIU Min, ZHANG Youfei, GUO Fangyu, et al. Effect of surface roughness on floatability of coal slime[J]. Coal Science and Technology, 2019, 47（10）: 253.
计量
- 文章访问数: 115
- HTML全文浏览量: 2
- PDF下载量: 68
下载:
