气流床煤气化细渣分级浮选及EDLVO理论分析

doi:10.16085/j.issn.1000-6613.2023-1780

化工进展 ›› 2024, Vol. 43 ›› Issue (11): 6475-6482.DOI: 10.16085/j.issn.1000-6613.2023-1780

• 资源与环境化工 • 上一篇

气流床煤气化细渣分级浮选及EDLVO理论分析

樊盼盼¹^,²^,³(), 樊晓婷¹^,²^,³, 杨进进¹^,²^,³, 樊民强⁴, 董连平⁴, 鲍卫仁¹^,²^,³, 王建成³()

^1.太原理工大学化学与化工学院, 山西太原 030024
^2.太原理工大学省部共建煤基能源清洁高效利用国家重点实验室, 山西太原 030024
^3.太原理工大学煤科学与技术教育部重点实验室, 山西太原 030024
^4.太原理工大学矿业工程学院, 山西太原 030024

收稿日期:2023-10-11 修回日期:2023-12-12 出版日期:2024-11-15 发布日期:2024-12-07
通讯作者: 王建成
作者简介:樊盼盼（1986—），男，讲师，研究方向为固废资源化利用。E-mail：fpp0313@126.com。
基金资助:
国家自然科学基金区域创新发展联合基金重点项目(U23A20131);科技部重点研发计划(2023YFB4103501)

Graded flotation of entrained-flow coal gasification fine slag and EDLVO analysis

FAN Panpan¹^,²^,³(), FAN Xiaoting¹^,²^,³, YANG Jinjin¹^,²^,³, FAN Minqiang⁴, DONG Lianping⁴, BAO Weiren¹^,²^,³, WANG Jiancheng³()

^1.College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
^2.State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
^3.Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
^4.College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

Received:2023-10-11 Revised:2023-12-12 Online:2024-11-15 Published:2024-12-07
Contact: WANG Jiancheng

摘要/Abstract

摘要：

煤气化渣是煤气化过程中产生的固体废弃物，其资源化利用制约着现代煤化工产业绿色、低碳发展。煤气化细渣粒度细、质量小、动量低的特点造成浮选过程中高灰分微细矿物在浮选泡沫产品中的夹带，严重影响了浮选精炭产品质量。本文采用分级浮选的工艺对煤气化细渣进行了浮选条件优化。+0.045mm粒度级煤气化细渣采用载体浮选，研究了载体添加比例对浮选效果的影响。结果表明，提高载体添加量可显著增强浮选效果，在设计实验条件下，浮选完善度达到71.53%，浮选精炭产品可燃体回收率为87.57%，相较于未添加载体的常规浮选方法提高了20.57%。通过EDLVO理论计算了载体颗粒与煤气化细渣颗粒间的相互作用力，载体浮选过程中，载体颗粒与煤气化渣残炭颗粒之间的静电作用力表现为吸引力，容易发生黏附行为，促进了微细颗粒的团聚，提高了浮选效果。-0.045mm粒度级采用絮凝浮选的方法，随絮凝剂用量的增加，颗粒絮团体积增大，-0.045mm粒度级浮选完善度呈先增大后减小的趋势，最高为39.61%，浮选精炭产品灰分降低不明显。絮团图像分析表明，絮凝剂的加入促进了颗粒之间的团聚，增大了颗粒的表观粒度。但非选择性团聚导致浮选精炭产品灰分偏高，后续应进一步提高絮凝选择性。本研究提出的煤气化渣分级浮选工艺对于降低微细粒高灰颗粒对浮选精炭的夹带作用，进一步提高精炭产品质量具有一定的理论指导意义。

关键词: 煤气化渣, 浮选, 分级浮选, 载体浮选, 絮凝浮选, EDLVO理论

Abstract:

Coal gasification fine slag (CGFS) is a solid waste produced in the process of coal gasification, and its resource utilization problems restrict the green and low-carbon development of coal chemical industry. The characteristics of CGFS, such as fine particle size, small mass and low momentum, cause serious entrainment of high ash content fine particles in foam products during flotation, which affects the quality of flotation concentrate. In this paper, the graded flotation process was used to optimize the flotation conditions of CGFS. The carrier flotation process was used to study the effect of carrier ratio on the flotation efficiency of CGFS with a particle size of +0.045mm. The research results indicated that increasing the carrier ratio could significantly enhance the flotation effect. Under the designed experimental conditions, the flotation perfection index reached to 71.53%, and the combustible recovery was 87.57%, which was 20.57% higher than the conventional flotation without carrier. The interaction force between carrier and CGFS was calculated using EDLVO theory. During the carrier flotation process, the electrostatic force between carrier and CGFS showed attraction, which was prone to adhesion behavior, promoting the aggregation of fine particles and improving the flotation effect. The flocculation flotation method was adopt for -0.045mm particle size. With the increasing of flocculant dosage, the flotation perfection index of -0.045mm size CGFS showed a trend of increasing first and then decreasing, the highest flotation perfection was 39.61%, and the ash content of flotation concentrate was not significantly reduced. The flocculation analysis showed that the addition of flocculant promoted the non-selective agglomeration between particles, which led to the high ash content of the flotation concentrate, and the selective flocculation effect should be further improved subsequently. The CGFS classification flotation process proposed in this study has certain theoretical guidance for reducing the entrainment of fine and high ash content particles on flotation, and further improving the quality of refined carbon products.

Key words: coal gasification fine slag, flotation, classified flotation, carrier flotation, flocculation flotation, EDLVO theory

中图分类号:

TQ536

樊盼盼, 樊晓婷, 杨进进, 樊民强, 董连平, 鲍卫仁, 王建成. 气流床煤气化细渣分级浮选及EDLVO理论分析[J]. 化工进展, 2024, 43(11): 6475-6482.

FAN Panpan, FAN Xiaoting, YANG Jinjin, FAN Minqiang, DONG Lianping, BAO Weiren, WANG Jiancheng. Graded flotation of entrained-flow coal gasification fine slag and EDLVO analysis[J]. Chemical Industry and Engineering Progress, 2024, 43(11): 6475-6482.

图/表 10

表1 样品粒度组成

粒度级/mm	产率/%	灰分/%	筛上累积
粒度级/mm	产率/%	灰分/%	产率/%	灰分/%
+0.500	1.24	85.74	1.24	85.74
0.500~0.250	4.86	86.28	6.10	86.17
<0.250~0.125	8.25	54.57	14.35	68.01
<0.125~0.074	13.64	49.09	27.99	58.79
<0.074~0.045	10.03	73.79	38.02	62.75
-0.045	61.98	84.71	100.00	76.36

图1 不同粒度级煤气化细渣的XRD谱图

图2 不同粒度级煤气化细渣FTIR图谱

图3 不同粒度级煤气化细渣N2吸-脱附等温曲线和孔径分布

表2 样品孔隙结构参数

粒度级	BET比表面积/m²·g^-1	总孔容/cm³·g^-1	微孔孔容/cm³·g^-1	平均孔径/nm
-0.045mm	150	0.19	0.02	4.99
+0.045mm	358	0.33	0.08	3.65

图4 不同粒度煤气化灰渣SEM图

图5 载体添加量对浮选效果的影响

图6 载体浮选的范德华作用能

图7 NPAM用量对煤气化渣浮选效果的影响

图8 煤气化细渣颗粒聚团图像分析

参考文献 17

18	李方会, 何屈, 安龙, 等. 煤泥分级浮选脱硫降灰试验研究[J]. 煤炭加工与综合利用, 2022(11): 58-62.
	LI Fanghui, HE Qu, AN Long, et al. Experimental study on desulphurization and ash reduction of coal slime by graded flotation[J]. Coal Processing & Comprehensive Utilization, 2022(11): 58-62.
1	吴树畅, 于群生. “双碳”目标下煤炭企业绿色低碳转型探讨[J]. 中国集体经济, 2023(4): 42-45.
	WU Shuchang, YU Qunsheng. Discussion on green and low-carbon transformation of coal enterprises under the goal of “double carbon”[J]. China Collective Economy, 2023(4): 42-45.
2	ZHANG Yixin, WU Jianjun, WANG Yong, et al. Effect of hydrothermal dewatering on the physico-chemical structure and surface properties of Shengli lignite[J]. Fuel, 2016, 164: 128-133.
3	范宁, 张逸群, 樊盼盼, 等. 煤气化渣特性分析及资源化利用研究进展[J]. 洁净煤技术, 2022, 28(8): 145-154.
	FAN Ning, ZHANG Yiqun, FAN Panpan, et al. Research progress on characteristic analysis and resource utilization of coal gasification slag[J]. Clean Coal Technology, 2022, 28(8): 145-154.
4	李耀武, 刘侃. 现代煤气化技术发展综述[J]. 河南科技, 2017(7): 150-151.
	LI Yaowu, LIU Kan. Summary of the development of modern coal gasification technologies[J]. Henan Science and Technology, 2017(7): 150-151.
5	王冀, 孔令学, 白进, 等. 煤气化灰渣中残炭对灰渣流动性影响的研究进展[J]. 洁净煤技术, 2021, 27(1): 181-192.
	WANG Ji, KONG Lingxue, BAI Jin, et al. Research progress on the effect of residual carbon in coal gasification slag on ash and slag flow property[J]. Clean Coal Technology, 2021, 27(1): 181-192.
6	冯向港, 王海燕, 葛奋飞, 等. 煤气化渣高值化利用的研究进展及应用展望[J]. 洁净煤技术, 2023, 29(11): 122-132.
	FENG Xianggang, WANG Haiyan, GE Fenfei, et al. Research progress and application prospect of high-value utilization of coal gasification slag[J]. Clean Coal Technology, 2023, 29(11): 122-132.
7	任振玚, 井云环, 樊盼盼, 等. 气化渣水介重选及其分离炭制备脱硫脱硝活性焦试验研究[J]. 煤炭学报, 2021, 46(4): 1164-1172.
	REN Zhenyang, JING Yunhuan, FAN Panpan, et al. Experimental study on the water-medium gravity separation of gasification slag and the preparation of desulfurization and denitrification activated coke using separated carbon[J]. Journal of China Coal Society, 2021, 46(4): 1164-1172.
8	李慧泽, 董连平, 鲍卫仁, 等. 基于视密度的煤气化渣水介质旋流炭-灰分离[J]. 化工进展, 2021, 40(3): 1344-1353.
	LI Huize, DONG Lianping, BAO Weiren, et al. Carbon-ash separation of coal gasification slag in swirling water based on apparent density[J]. Chemical Industry and Engineering Progress, 2021, 40(3): 1344-1353.
9	中国化工报.太原理工大学煤气化渣资源化利用技术国际领先[EB/OL]. 2023-09-06. .
10	吴思萍, 赵凯, 董永胜, 等. 气化细渣浮选脱碳研究进展[J]. 华电技术, 2020, 42(7): 81-86.
	WU Siping, ZHAO Kai, DONG Yongsheng, et al. Research progress on flotation decarburization of gasified fine slag[J]. Huadian Technology, 2020, 42(7): 81-86.
11	GUO Fanhui, MIAO Zekai, GUO Zhenkun, et al. Properties of flotation residual carbon from gasification fine slag[J]. Fuel, 2020, 267: 117043.
12	于伟, 王学斌, 白永辉, 等. 煤气化细渣浮选脱碳试验研究[J]. 洁净煤技术, 2021, 27(3): 81-87.
	YU Wei, WANG Xuebin, BAI Yonghui, et al. Experimental study on decarbonization of coal gasification fine slag by flotation[J]. Clean Coal Technology, 2021, 27(3): 81-87.
13	SHI Da, ZHANG Jianbo, HOU Xinjuan, et al. Adsorption mechanism of a new combined collector (PS-1) on unburned carbon in gasification slag[J]. Science of the Total Environment, 2022, 818: 151856.
14	程延化. 月桂酸对煤气化细渣浮选的促进作用研究[J]. 现代矿业, 2022, 38(7): 162-167.
	CHENG Yanhua. Study on the promotion effect of lauric acid on flotation of coal gasification fine slag[J]. Modern Mining, 2022, 38(7): 162-167.
15	张海军, 王海楠, 李文峰, 等. 一种气化渣浮选捕收剂及其制备方法: CN113351376B[P]. 2023-03-31.
	ZHANG Haijun, WANG Hainan, LI Wenfeng, et al. Gasified slag flotation collecting agent and preparation method thereof: CN113351376B[P]. 2023-03-31.
16	卢天燊, 邓政斌, 刘志红, 等. 高灰难选煤泥分级浮选降灰实验研究[J]. 矿产综合利用, 2022(2): 142-149.
	LU Tianshen, DENG Zhengbin, LIU Zhihong, et al. Experimental study on deashing of high ash and refractory coal slime by classification flotation[J]. Multipurpose Utilization of Mineral Resources, 2022(2): 142-149.
17	HUANG Gen, XU Hongxiang, MA Liqiang, et al. Improving coal flotation by classified conditioning[J]. International Journal of Coal Preparation and Utilization, 2018, 38(7): 361-373.

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气流床煤气化细渣分级浮选及EDLVO理论分析

Graded flotation of entrained-flow coal gasification fine slag and EDLVO analysis

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