-
摘要:
这是一篇矿业工程领域的论文。蒙脱石是对煤泥水沉降影响显著的黏土矿物，其表面带电和易发生水化作用等特性阻碍颗粒间的聚团，使悬浮液保持分散性，恶化煤泥水沉降。基于沉降实验，考查了煤泥水中常见金属离子Na+、K+、Mg2+、Ca2+及Al3+对蒙脱石沉降特性的影响，并采用微量热仪、Zeta电位分析仪及红外光谱仪等表征手段揭示金属离子对蒙脱石水化作用及沉降行为的影响机理。结果表明，与Na+、K+、Mg2+相比，蒙脱石悬浮液或含蒙脱石煤泥水在加入Al3+、Ca2+后，可获得较小的沉降压缩层体积和上清液浊度，沉降效果较好。机理分析表明，加入金属离子可压缩蒙脱石表面双电层厚度，抑制蒙脱石水化作用，有利于蒙脱石聚团沉降。研究结果对处理含蒙脱石煤泥水具有一定指导意义。
Abstract:This is an article in the field of mining engineering. Montmorillonite is a kind of clay mineral which has significant impact on the sedimentation of coal slime water. Its charged surface and easy hydration hinder the mutual contact between particles, keeping the suspension stable dispersion and worsen the sedimentation of slime water. Based on sedimentationexperiments, we studied the effects of common metal cations Na+, K+, Mg2+, Ca2+and Al3+ on the sedimental characteristics of montmorillonite. Meanwhile, the mechanism of various metal cations in the hydration and sedimentation behavior of montmorillonite was investigated by using microcalorimeter, Zeta potential analyzer and infrared spectrometer. The experiment results show that, adding Al3+ and Ca2+ to montmorillonite suspension or montmorillonite-containing slime water can result into smaller sedimentation compressed layer and lower turbidity of the supernatant. So, Al3+ and Ca2+ show better performance in thesedimentation when compared with Na+, K+, Mg2+. The mechanism analysis shows that metal cations compress the electric double layer on the surface of montmorillonite, thus inhibit the hydration of montmorillonite, and are conducive to the agglomeration and sedimentation of montmorillonite. The research results have scientific significance for the treatment of montmorillonite-containing coal slime water.
-
-
表 1 蒙脱石试样的主要化学成分/%
Table 1. Chemical composition of the montmorillonite sample
Al2O3 BaO CaO Cr2O3 TFe2O3 K2O MgO MnO Na2O P2O5 SiO2 SO3 SrO TiO2 LOI 16.01 0.01 2.94 <0.01 4.89 0.21 5.00 0.03 3.24 0.03 59.41 0.01 0.02 0.32 7.73 
下载: 导出CSV
表 2 蒙脱石与不同金属离子溶液的反应热/（J/g）
Table 2. Reaction heat of montmorillonite with different metal cations
离子种类 去离子水 Na+ K+ Mg2+ Ca2+ Al3+ 反应热/（J/g） -7.396 -10.915 -15.475 -16.404 -17.237 -16.546
下载: 导出CSV
-
[1] 王云飞, 李宏亮, 董宪姝, 等. 伊利石对煤泥水过滤机制的影响研究[J]. 矿产综合利用, 2020(4):202-208.WANG Y F, Li H L, DONG X S, et al. Study on effect of illite on the filtration mechanism of coal slime water[J]. Multipurpose Utilization of Mineral Resources, 2020(4):202-208. doi: 10.3969/j.issn.1000-6532.2020.04.035
WANG Y F, Li H L, DONG X S, et al. Study on effect of illite on the filtration mechanism of coal slime water[J]. Multipurpose Utilization of Mineral Resources, 2020(4):202-208. doi: 10.3969/j.issn.1000-6532.2020.04.035
[2] 张绍强. 统筹推进煤炭行业节能减碳, 积极应对碳达峰、碳中和挑战[J]. 煤炭加工与综合利用, 2021(5):1-6.ZHANG S Q. Coordinate and push industry energy-saving and carbon reduction, actively deal with carbon peak, and carbon neutrality challenge[J]. Coal Processing & Comprehensive Utilization, 2021(5):1-6.
ZHANG S Q. Coordinate and push industry energy-saving and carbon reduction, actively deal with carbon peak, and carbon neutrality challenge[J]. Coal Processing & Comprehensive Utilization, 2021(5):1-6.
[3] 刘峰, 曹文君, 张建明, 等. 我国煤炭工业科技创新进展及“十四五”发展方向[J]. 煤炭学报, 2021, 46(1):1-15.LIU F, CAO W J, ZHANG J M, et al. Current technological innovation, and development direction of the 14th Five-Year Plan period in China coal industry[J]. Journal of China Coal Society, 2021, 46(1):1-15.
LIU F, CAO W J, ZHANG J M, et al. Current technological innovation, and development direction of the 14th Five-Year Plan period in China coal industry[J]. Journal of China Coal Society, 2021, 46(1):1-15.
[4] 陈嘉明. 四种粘土矿物在碱与硫酸盐复合激发下的矿物学变化研究[D]. 北京: 中国地质大学(北京), 2020.CHEN J M. Mineralogical changes of four clay minerals under the excitation of alkali and sulfate [D]. Beijing: China University of Geosciences (Beijing) 2020.
CHEN J M. Mineralogical changes of four clay minerals under the excitation of alkali and sulfate [D]. Beijing: China University of Geosciences (Beijing) 2020.
[5] 刘国强, 刘文礼, 王东辉, 等. 蒙脱石水化膨胀抑制对煤泥水过滤的影响[J]. 煤炭学报, 2018, 43(S2):553-559.LIU G Q, LIU W L, WANG D H, et al. Effect of hydration expansion inhibition of montmorillonite on sludgy water filtration[J]. Journal of China Coal Society, 2018, 43(S2):553-559.
LIU G Q, LIU W L, WANG D H, et al. Effect of hydration expansion inhibition of montmorillonite on sludgy water filtration[J]. Journal of China Coal Society, 2018, 43(S2):553-559.
[6] 陶源清, 颜克凤, 李小森, 等. 盐离子对蒙脱石水化膨胀特性的影响[J]. 过程工程学报, 2020, 20(10):1182-1189.TAO Y Q, YAN K F, LI X S, et al. Effects of salt ions on the hydration and expansion characteristics of montmorillonite[J]. The Chinese Journal of Process Engineering, 2020, 20(10):1182-1189. doi: 10.12034/j.issn.1009-606X.219364
TAO Y Q, YAN K F, LI X S, et al. Effects of salt ions on the hydration and expansion characteristics of montmorillonite[J]. The Chinese Journal of Process Engineering, 2020, 20(10):1182-1189. doi: 10.12034/j.issn.1009-606X.219364
[7] 徐东方, 武昊, 朱志波, 等. 蒙脱石与煤的异相凝聚机理[J]. 煤炭学报, 2017, 42(5):1284-1289.XU D F, WU H, ZHU Z B, et al. Mechanism of hetero-aggregation of montmorillonite and coal[J]. Journal of China Coal Society, 2017, 42(5):1284-1289.
XU D F, WU H, ZHU Z B, et al. Mechanism of hetero-aggregation of montmorillonite and coal[J]. Journal of China Coal Society, 2017, 42(5):1284-1289.
[8] 白英生. 典型物相转变过程的微量热研究初探[D]. 南京: 南京大学, 2020.BAI Y S. Primary microcalorimetry study of typicle phase transition process [D]. Nanjing: Nanjing University, 2020.
BAI Y S. Primary microcalorimetry study of typicle phase transition process [D]. Nanjing: Nanjing University, 2020.
[9] 吴伦. 基于原子力显微镜的煤粒表面水化膜和颗粒间相互作用力研究[D]. 徐州: 中国矿业大学, 2015.WU L. Study on hydration film on coal surface and interaction force between particles based on AFM [D]. Xuzhou: China University of Mining and Technology, 2015.
WU L. Study on hydration film on coal surface and interaction force between particles based on AFM [D]. Xuzhou: China University of Mining and Technology, 2015.
[10] 孙迎林, 闵凡飞, 陈晨, 等. 金属阳离子在煤泥颗粒表面上吸附机理研究现状[J]. 矿产综合利用, 2015(1):14-17.SUN Y L, MIN F F, CHEN C, et al. Research status about the adsorption characteristics of the metal cations of the coagulant in the coal slurry[J]. Multipurpose Utilization of Mineral Resources, 2015(1):14-17 doi: 10.3969/j.issn.1000-6532.2015.01.003
SUN Y L, MIN F F, CHEN C, et al. Research status about the adsorption characteristics of the metal cations of the coagulant in the coal slurry[J]. Multipurpose Utilization of Mineral Resources, 2015(1):14-17 doi: 10.3969/j.issn.1000-6532.2015.01.003
[11] Eric Ferrage, Bruno Lanson, Boris A Sakharov, et al. Investigation of dioctahedral smectite hydration properties by modeling of X-ray diffraction profiles: Influence of layer charge and charge location[J]. American Mineralogist, 2015, 92(10).
[12] 刘敏, 曹亦俊, 罗佳倩, 等. 金属阳离子对亲水颗粒间静电作用的影响[J]. 中国矿业大学学报, 2021, 50(3):442-448.LIU M, CAO Y J, LUO J Q, et al. Effect of metal cations on the electrostatic interaction between hydrophilic particles[J]. Journal of China University of Mining & Technology, 2021, 50(3):442-448.
LIU M, CAO Y J, LUO J Q, et al. Effect of metal cations on the electrostatic interaction between hydrophilic particles[J]. Journal of China University of Mining & Technology, 2021, 50(3):442-448.
[13] 彭陈亮. 煤泥水中微细蒙脱石颗粒表面水化作用机理研究[D]. 合肥: 安徽理工大学, 2013.PENG C L. Mechanism study on hydration of fine montmorillonite particles in coal slime water [D]. Hefei: Anhui University of Science & Technology(aust), 2013.
PENG C L. Mechanism study on hydration of fine montmorillonite particles in coal slime water [D]. Hefei: Anhui University of Science & Technology(aust), 2013.
[14] 郭旭颖, 邢经纬, 付赛欧, 等. Cr-Al、Fe-Al、La-Al柱撑蒙脱石的制备及其吸附特性[J]. 中国粉体技术, 2020, 26(5):22-27.GUO X Y, XING J W, FU S O, et al. Preparation and adsorption properties of Cr-Al, Fe-Al and La-Al pillared montmorillonite[J]. China Powder Science and Technology, 2020, 26(5):22-27.
GUO X Y, XING J W, FU S O, et al. Preparation and adsorption properties of Cr-Al, Fe-Al and La-Al pillared montmorillonite[J]. China Powder Science and Technology, 2020, 26(5):22-27.
-
图(12)
表(2)
计量
- 文章访问数: 650
- PDF下载数: 299
- 施引文献: 0