强化剂对低变质粉煤制备型焦过程的影响研究

摘要为解决低变质粉煤制备的型焦产品存在强度较低的问题,以低变质粉煤(HL)为原料,煤沥青(LQ)黏结剂,并配入以苯类同系物为主的强化剂(AC)进行强化,采用冷压成型热解技术制备型焦,确定了最适宜工艺条件。通过FT-IR、四组分萃取等对型焦进行分析表征,深入探讨了AC对型焦抗压强度的强化作用机制。研究表明,在LQ添加比例为35%、炭化温度900 ℃、保留时间120 min的条件下,当AC添加比例为3%时,型焦的抗压强度可提升至26.22 MPa。AC能降低原料之间的排斥力使其能结合得更加紧密,并且与—CH₃、—OH等官能团发生取代反应,使脂肪族—CH、芳烃C＝C和C—O相对含量分别提高了429.52%、186.56%和119.00%,同时增强了脂肪烃和芳烃的活性,炭化时会生成更多的芳香族化合物,使得沥青烯和前沥青烯的质量分数分别增大了3.5%和2.0%,进而导致胶质体含量增加,增强了结焦性能,提高了型焦的抗压强度。

	Service

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	Email Alert
	RSS
	作者相关文章
	王超凡
	宋永辉
	尹宁
	沈小瑞
	李亮
	兰新哲

关键词：低变质粉煤沥青强化剂型焦抗压强度

Abstract： In order to solve the problem of low strength of formed coke products prepared from low-rank pulverized coal, this paper takes low low-rank pulverized coal (HL) as raw material, coal pitch (LQ) binder, and addition of benzene homologues as the main fortifying agent (AC). The formed coke was prepared using cold pressing molding pyrolysis technology, and the optimum process conditions for formed coke preparation were determined. The formed coke was analyzed and characterized by FT-IR and four component extraction, and the strengthening mechanism of AC addition on the formed coke compressive strength was discussed. The results showed that under the conditions of LQ addition ratio of 35%, pyrolysis temperature of 900 ℃ and retention time of 120 min, when AC addition ratio of 3%, the formed coke compressive strength could be increased from 20.00 MPa to 26.22 MPa. AC can reduce the repulsive force between raw materials to make them more closely combined, and undergo substitution reactions with functional groups such as —CH₃ and —OH, resulting in an increase in the relative contents of aliphatic —CH, aromatics C＝C and C—O by 429.52%, 186.56% and 119.00%, respectively. Meanwhile, the activities of aliphatic hydrocarbon and aromatic hydrocarbons were enhanced and more aromatic compounds were generated during pyrolysis process. The asphaltene and pre-asphaltene contents increased by 3.5% and 2.0% respectively, which led to an increase in the colloidal body content, enhanced coking performance, and improved the formed coke compressive strength.

Keywords： low rank pulverized coal coal pitch activator formed coke compressive strength

Received 2023-04-13;

Fund:陕西省自然科学基金联合项目(2019JOM-44)。

Corresponding Authors: 宋永辉,教授,syh1231@126.com。 Email: syh1231@126.com

About author: 王超凡(1997—),男,硕士研究生,研究方向为煤清洁转化及增值利用。

引用本文:

王超凡, 宋永辉, 尹宁, 沈小瑞, 李亮, 兰新哲.强化剂对低变质粉煤制备型焦过程的影响研究[J]. 化学工业与工程, 2025,42(2): 89-96

WANG Chaofan, SONG Yonghui, YIN Ning, SHEN Xiaorui, LI Liang, LAN Xinzhe.Impact of enhancer of low rank pulverized coal in the process of preparation of formed coke[J]. Chemcial Industry and Engineering, 2025,42(2): 89-96

[1] 中华人民共和国国家统计局. 2021中国统计年鉴[M]. 北京: 中国统计出版社, 2021 National Bureau of Statistics of the People's Republic of China. 2021 China statistical yearbook [M]. Beijing: China Statistics Press, 2021
[2] 吉登高, 王祖讷, 张丽娟, 等. 粉煤成型原料粒度组成的试验研究[J]. 煤炭学报, 2005, 30(1): 100-103 JI Denggao, WANG Zune, ZHANG Lijuan, et al. The examination study of the size-composition of the fine-coal briquetting[J]. Journal of China Coal Society, 2005, 30(1): 100-103(in Chinese)
[3] MORI A, YUNIATI M D, MURSITO A T, et al. Preparation of coke from Indonesian lignites by a sequence of hydrothermal treatment, hot briquetting, and carbonization[J]. Energy & Fuels, 2013, 27(11): 6607-6616
[4] 孟佳文, 曾泽泉, 刘勇进, 等. 制备工艺对民用型焦抗压强度及燃烧性能与污染物排放特性的影响[J]. 煤炭转化, 2019, 42(1): 48-56 MENG Jiawen, ZENG Zequan, LIU Yongjin, et al. Effects of preparation conditions on mechanical strength, combustion performance and pollutant emission characteristics of civilian formed coke[J]. Coal Conversion, 2019, 42(1): 48-56(in Chinese)
[5] 尹宁, 宋永辉, 陈瑶, 等. 低变质粉煤与沥青成型热解制备型焦的研究[J]. 煤炭转化, 2019, 42(2): 25-31 YIN Ning, SONG Yonghui, CHEN Yao, et al. Study on preparation of formed coke from co-pyrolysis of low rank pulverized coal and pitch[J]. Coal Conversion, 2019, 42(2): 25-31(in Chinese)
[6] SONG Y, HE W, MA Q, et al. Effect of binder composition on the preparation of formed coke with low-rank coal[J]. International Journal of Coal Preparation and Utilization, 2020, 40(6): 376-388
[7] SEIJI N, KENJI K, TOMOYUKI N, et al. The effect of plastic addition on coal caking properties during carbonization[J]. Fuel, 2003, 82(14): 1775-1782
[8] CHANG C, WHANG T, HUANG D, et al. Thermoplasticity and strength improvement of coking coal by addition of coal extracts[J]. Fuel, 2014, 117: 364-371
[9] ZHONG Q, YANG Y, LI Q, et al. Coal tar pitch and molasses blended binder for production of formed coal briquettes from high volatile coal[J]. Fuel Processing Technology, 2017, 157: 12-19
[10] GUO Y, XU W, ZHU J, et al. The burden structure and its consumption in the melter gasifier of the corex process[J]. Metallurgical and Materials Transactions B, 2013, 44(5): 1078-1085
[11] 白永建, 许德平, 王永刚. 煤沥青对不同变质程度煤成焦性能的影响[J]. 煤炭转化, 2013, 36(2): 59-62, 78 BAI Yongjian, XU Deping, WANG Yonggang. Effect of coal tar pitch on the coking performances from different rank of coals[J]. Coal Conversion, 2013, 36(2): 59-62, 78(in Chinese)
[12] BENK A. Utilization of the binders prepared from coal tar pitch and phenolic resins for the production metallurgical quality briquettes from coke breeze and the study of their high temperature carbonization behaviour[J]. Fuel Processing Technology, 2010, 91(9): 1152-1161
[13] 艾沙江·斯拉木, 王永刚, 林雄超, 等. 三道岭兰炭粉制备冶炼用型焦的工艺研究[J]. 煤炭转化, 2016, 39(2): 51-58 Aishajiang·Silamu, WANG Yonggang, LIN Xiongchao, et al. Study on process of molding metallurgical coke formed by sandaoling blue-coke powder[J]. Coal Conversion, 2016, 39(2): 51-58 (in Chinese)
[14] 邓建, 武建军, 郜强, 等. 无烟煤制铸造型焦工艺条件的优化[J]. 能源技术与管理, 2008, 33(3): 102-104 DENG Jian, WU Jianjun, GAO Qiang, et al. Optimization of technological conditions for making cast coke from anthracite[J]. Energy Technology and Management, 2008, 33(3): 102-104(in Chinese)
[15] 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 macroscopic components in low rank coal[J]. Coal Science and Technology, 2019, 47(9): 97-104(in Chinese)
[16] 陈茺, 许学敏, 高晋生. 煤中前沥青烯与沥青烯性质的研究[J]. 华东理工大学学报, 1998(1): 31-34 CHEN Chong, XU Xuemin, GAO Jinsheng. Study on properties of preasphaltene and asphaltene in coal[J]. Journal of East China University of Science and Technology, 1998(1): 31-34 (in Chinese)
[17] CUI X, LI X, LI Y, et al. Evolution mechanism of oxygen functional groups during pyrolysis of Datong coal[J]. Journal of Thermal Analysis and Calorimetry, 2017, 129(2): 1169-1180
[18] WANG S, TANG Y, SCHOBERT H H, et al. FTIR and ¹³C NMR investigation of coal component of Late Permian coals from southern China[J]. Energy & Fuels, 2011, 25(12): 5672-5677
[19] MENG D, YUE C, WANG T, et al. Evolution of carbon structure and functional group during Shenmu lump coal pyrolysis[J]. Fuel, 2021, 287: 119538
[20] 盛清涛, 凌开成, 申峻, 等. 煤中矿物质对神府煤快速液化的影响[J]. 洁净煤技术, 2008, 14(4): 25-27, 24 SHENG Qingtao, LING Kaicheng, SHEN Jun, et al. Study the effect of mineral matter on Shenfu coal rapid liqufaction[J]. Clean Coal Technology, 2008, 14(4): 25-27, 24(in Chinese)