石蜡乳液表面包覆改性低阶煤及其对水煤浆性能的影响

doi:10.16085/j.issn.1000-6613.2017-1202

化工进展 ›› 2018, Vol. 37 ›› Issue (04): 1421-1425.DOI: 10.16085/j.issn.1000-6613.2017-1202

石蜡乳液表面包覆改性低阶煤及其对水煤浆性能的影响

胡仕宁, 张光华, 杜伦, 李俊国

陕西科技大学教育部轻化工助剂化学与技术重点实验室, 陕西西安 710021

收稿日期:2017-06-10 修回日期:2017-08-09 出版日期:2018-04-05 发布日期:2018-04-05
通讯作者: 张光华,教授,博士生导师。
作者简介:胡仕宁(1993-),男,硕士研究生。E-mail:892996428@qq.com。
基金资助:
国家自然科学基金（21176148）、陕西省科技攻关计划（2014K10-01）、陕西省科技厅自然科学基础研究计划（2016JM2017）及陕西省教育厅重点实验室科研计划（16JS012）项目。

Surface modification of a low rank coal with paraffin emulsion and its effect on performances of coal water slurry

HU Shining, ZHANG Guanghua, DU Lun, LI Junguo

Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, China

Received:2017-06-10 Revised:2017-08-09 Online:2018-04-05 Published:2018-04-05

摘要/Abstract

摘要： 以微波法脱除内蒙古霍林河褐煤煤粒内水并分别以非离子石蜡乳液和阴离子石蜡乳液对煤粒进行包覆改性。考察了原煤粒（YM）、微波干燥煤粒（WB）、非离子石蜡乳液改性煤粒（NPE）和阴离子石蜡乳液改性煤粒（APE）的比表面积、孔容积和孔径，结果表明，阴离子石蜡乳液较非离子石蜡乳液的封孔效果更佳。考察了水在4种煤粒上的接触角及4种煤粒的吸水率，结果表明APE具有最好的疏水性。考察了萘磺酸盐分散剂（NSF）在4种煤粒上的吸附膜厚度，结果表明，NSF在YM、WB、NPE和APE上的吸附膜厚度分别为0.61nm、1.13nm、2.19nm和2.89nm。以4种煤粒制备水煤浆并测试其成浆性能，结果表明，APE水煤浆具有最高的成浆浓度和最优的稳定性。

关键词: 褐煤, 表面疏水改性, 水煤浆, 成浆性

Abstract: The lignite coal particles from the Inner Mongolia Huolinhe were heated by microwave to remove inner water and were coated with anionic paraffin emulsion and cationic paraffin emulsion. The specific surface areas, pore volumes and average pore sizes of raw coal particles(YM),coal particles treated by microwave(WB),coal particles coated with anionic paraffin emulsion(NPE) and coal particles coated with cationic paraffin emulsion(APE) were examined. The results showed that the cationic paraffin emulsion sealed the holes better than the anionic paraffin emulsion did. The contact angles and water suction rates of the fore coal particles were tested, and the results illustrated that APE had the best hydrophobicity. The adsorption film thicknesses of a naphthalenesulfonate dispersant(NSF) on the three coal particles were determined. It was found that the adsorption film thicknesses of NSF on YM,WB,NPE and APE were 0.61nm,1.13nm,2.19nm and 2.89nm, respectvely. The coal water slurries(CWSs) were prepared from the fore tested coal particles and their pulp properties were investigated. The results suggested that the CWS from APE had the highest pulp concentration and the best stability.

Key words: lignite, surface hydrophobicity modification, coal-water slurry, slurry ability

中图分类号:

TQ536.1

胡仕宁, 张光华, 杜伦, 李俊国. 石蜡乳液表面包覆改性低阶煤及其对水煤浆性能的影响[J]. 化工进展, 2018, 37(04): 1421-1425.

HU Shining, ZHANG Guanghua, DU Lun, LI Junguo. Surface modification of a low rank coal with paraffin emulsion and its effect on performances of coal water slurry[J]. Chemical Industry and Engineering Progress, 2018, 37(04): 1421-1425.

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石蜡乳液表面包覆改性低阶煤及其对水煤浆性能的影响

Surface modification of a low rank coal with paraffin emulsion and its effect on performances of coal water slurry

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