电化学处理对神木煤显微组分表面结构及可浮性的影响研究

赵伟; 杨志远; 李振; 周安宁

电化学处理对神木煤显微组分表面结构及可浮性的影响研究

赵伟^{1, 2},
杨志远^{1, 2},
李振^{1, 2},
周安宁^{1, 2, ,}

1.
西安科技大学化学与化工学院, 陕西西安 710054
2.
国土资源部煤炭资源勘查与综合利用重点实验室, 陕西西安 710021

基金项目:

国家自然科学基金 51404194

国土资源部煤炭资源勘查与综合利用重点实验室项目 KF2015-2

西安科技大学培育基金 201622

详细信息

通讯作者:
周安宁, Tel:029-85583182, E-mail:psu564@139.com

中图分类号: TQ536
计量
- 文章访问数: 88
- HTML全文浏览量: 42
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2016-12-09
- 修回日期: 2017-02-22
- 网络出版日期: 2021-01-23
- 刊出日期: 2017-04-10

Influence of electrochemical treatment on surface structure and flotability of Shenmu coal macerals

ZHAO Wei^{1, 2},
YANG Zhi-yuan^{1, 2},
LI Zhen^{1, 2},
ZHOU An-ning^{1, 2
, ,}

1.
College of Chemistry & Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
2.
Ministry of Land and Resources, Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Xi'an 710021, China

Funds:

the National Natural Science Foundation of China 51404194

Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources of China KF2015-2

Cultivation Fund of Xi'an University of Science and Technology 201622

摘要

摘要: 为建立煤岩显微组分的电化学浮选分离方法，以铝为电极，考察了阳极和阴极电化学处理对神木煤镜质组和惰质组表面结构及表面电位和润湿性的影响规律。结果表明，电化学处理对煤岩显微组分表面-OH、-COOH等含氧官能团影响显著；阳极处理使显微组分表面zeta电位向负电方向偏移，且润湿性增加，阴极处理则使其向正电方向偏移，润湿性减小；阳极处理后镜质组接触角的变化趋势更为显著，而阴极处理对于惰质组的影响更为明显。
- 电化学 /
- 煤岩显微组分 /
- 表面结构 /
- 表面电位 /
- 润湿性
Abstract: The effect of the electrochemical treatment on the surface structure and flotability of the macerals in Shenmu coal was studied, which aimed to provide a theoretical foundation for the separation by electrochemical flotation. The influence of anode and cathode on the surface structure, surface potential and wettability of Shenmu vitrinite and inertinite was investigated. The results show that the electrochemical treatment has a significant effect on the oxygen-containing functional groups of coal macerals such as-OH, -COOH, etc. The surface zeta potential of macerals moves towards the electronegativity and the wettability of macerals increases when the treatment is conducted with electrochemical anode. However, the surface zeta potential of macerals moves towards the electropositivity and the wettability decreases when the electrochemical cathode is used. The variation trend of contact angle for the vitrinite treated with electrochemical anode is more obvious, while the inertinite treated with electrochemical cathode is more conspicuous.
- electrochemical /
- coal maceral /
- surface structure /
- surface potential /
- wettability

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图 1 SMV和SMI的红外光谱谱图

Figure 1 FT-IR spectrograms of SMV and SMI

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图 2 SMV和SMI羟基红外光谱多峰拟合

Figure 2 Multi peak fitting of hydroxyl of SMV and SMI

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图 3 SMV和SMI脂肪烃红外光谱分峰拟合

Figure 3 Multi peak fitting of aliphatic hydrocarbon of SMV and SMI

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图 4 经电化学阳极处理的SMV和SMI的红外光谱谱图

Figure 4 FT-IR spectrograms of SMV and SMI treated with electrochemical anode

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图 5 经电化学阴极处理的SMV和SMI的红外光谱谱图

Figure 5 FT-IR spectrograms of SMV and SMI treated with electrochemical cathode

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图 6 电化学阳极处理对SMV和SMI表面zeta电位的影响

Figure 6 Effects of the treatment with electrochemical anode on zeta potential of SMV and SMI

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图 7 电化学阴极处理对SMV和SMI表面zeta电位的影响

Figure 7 Effects of the treatment with electrochemical cathode on zeta potential of vitrinite and inertinite

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图 8 电化学处理时间对显微组分接触角的影响

Figure 8 Influence of the electrochemical treatment time on contact angles of Shenmu macerals

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表 1 神木煤的工业分析及显微组分组成

Table 1 Proximate and maceral composition of Shenmu coal samples

Sample	Proximate w/%				Maceral composition /%
Sample	M_ad	A_d	V_daf	FC_ad	Vitrinite	Inertinite	Liptinite	Minerals
Raw coal	7.29	3.14	39.47	54.36	62.7	33.5	0.8	3.0
Vitrinite concentrate (SMV)	9.15	2.96	41.26	51.79	95.4	2.4	1.2	1.0
Inertinite concentrate (SMI)	7.64	4.37	33.53	58.71	3.1	93.4	0.6	2.9

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表 2 SMV和SMI红外光谱的主要吸收峰归属及峰面积

Table 2 Assignment and area of FT-IR peak for SMV and SMI

Wavenumber σ/ cm^-1	Assignment of spectral peak	Peak area
Wavenumber σ/ cm^-1	Assignment of spectral peak	SMV	SMI
3 600-3 100	-OH, -NH stretching vibration	31.26	19.86
3 100-3 000	-CH (Ar) stretching vibration	0.38	1.92
3 000-2 900	-CH₃, -CH₂, -CH symmetrical stretching vibration	7.84	4.63
2 880-2 800	-CH₃, -CH₂ asymmetrical stretching vibration	1.75	1.61
1 790-1 680	C=O, -COOH stretching vibration	15.09	18.62
1 680-1 520	aromatic C=C stretching vibration, C=O conjugate vibration	12.67	13.23
1 520-1 400	-CH₃, -CH₂ symmetric bending vibration	4.09	2.33
1 200-950	C-O stretching vibration	9.31	8.19
950-700	substituted aromatic C-H out of plane bending vibration	8.41	10.62

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表 3 SMV和SMI脂肪烃红外分峰官能团及参数

Table 3 Functional groups and absorption peak parameters of aliphatic hydrocarbon of SMV and SMI from FT-IR peak resolution and fitting

Wavenumber σ/cm^-1	Assignment of spectral peak	Peak area		Proportion of peak /%
Wavenumber σ/cm^-1	Assignment of spectral peak	SMV	SMI	SMV	SMI
2 850	symmetry R₂CH₂	0.715 2	0.424 1	20.4	25.2
2 880	symmetry RCH₃	0.301 8	0.112 8	8.6	6.7
2 900	R₃CH	0.576 2	0.446 3	16.4	26.5
2 920	asymmetry R₂CH₂	1.482 4	0.465 2	42.2	27.7
2 950	asymmetry RCH₃	0.438 6	0.232 9	12.5	13.9

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表 4 接触角拟合参数

Table 4 Fitting parameters of contact angles

Fitting formula：y=a(x-b)	Anode (+)		Cathode (-)
Fitting formula：y=a(x-b)	SMV	SMI	SMV	SMI
a	-0.541 94	-0.258 51	0.296 23	0.436 57
b	121.613 59	192.051 66	-219.719 35	-114.176 48
R²	0.987 71	0.974 13	0.982 86	0.990 41

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