首钢高炉喷吹煤种的灰熔融特性

doi:10.13228/j.boyuan.issn1006-9356.20190213

摘要
图/表
参考文献
相关文章 (9)

全文: PDF (1056 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为了研究首钢高炉喷吹煤粉在风口前灰渣的熔点和高温黏度特性,采用灰熔点仪和FactSage软件对首钢几种常用喷吹煤种及混煤的灰熔融特性进行了对比分析,发现两种方法得到的结果具有相同的趋势。利用FactSage热力学计算软件,分析了1 600 ℃下京唐、迁钢两地喷吹煤灰在SiO₂-CaO-Al₂O₃-MgO(w(MgO)＝2%)四元相图中的位置,并对灰组分中SiO₂、Al₂O₃、CaO、MgO、Fe₂O₃对液相线温度和对高温下煤灰黏度的影响进行了分析。研究发现,不同灰组分改变对煤灰液相线温度和黏度的影响是不同的,灰组分对液相线温度的影响相对复杂。高温状态下,首钢高炉煤灰下灰组分中Al₂O₃、Fe₂O₃、MgO质量分数增加有降低煤灰黏度的作用,而SiO₂质量分数增加会增加煤灰黏度。混煤时应考虑不同组分对煤灰液相线温度和黏度的影响,通过合理控制灰组分达到控制风口前结渣的目的。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	作者相关文章
	王冬青
	徐萌
	竺维春

关键词 ：喷吹煤, 灰熔融性, FactSage, 灰渣黏度

Abstract：In order to study the melting point and high-temperature viscosity of the ash produced by the pulverized coal injection into blast furnace before the tuyere in Shougang, the ash fusion properties of several common coal types and coal blends in Shougang were compared by the ash fusion melting point meter and FactSage software. The result showed that the values obtained by the two methods had the same trend. The position of the blasting coal ash in SiO₂-CaO-Al₂O₃-MgO(w(MgO)＝2%)phase diagram at 1 600 ℃ in Jingtang and Qiangang was analyzed using FactSage thermodynamic calculation software. The influence of coal ash composition of SiO₂, Al₂O₃, CaO, MgO, Fe₂O₃ on liquidus temperature and viscosity of coal ash at high temperature were studied. It was found that the influence of different ash components on the liquidus temperature and viscosity of coal ash was different. The effect of ash composition on liquidus temperature was more complex. At high temperature, the coal ash viscosity decreased with increasing the concentration of Al₂O₃, Fe₂O₃ and MgO in the ash composition of Shougang blast furnace. While the ash viscosity increased with increasing SiO₂ concentration in the coal. Therefore, the influence of different components on the liquidus temperature and viscosity of coal ash should be considered when mixing coal. It was possible to avoid slag-bonding before tuyere by controlling of ash composition.

Key words： pulverized coal ash fusion property FactSage software ash viscosity

收稿日期: 2019-05-05

基金资助:国家重点研发计划专项资助项目(2017YFB0304300,2017YFB0304302)

作者简介: 王冬青(1980—), 女, 硕士, 高级工程师; E-mail: wangdongqing@shougang.com.cn

引用本文:

王冬青, 徐萌, 竺维春. 首钢高炉喷吹煤种的灰熔融特性[J]. 中国冶金, 2019, 29(12): 7-13. WANG Dong-qing, XU Meng, ZHU Wei-chun. Ash fusion property of pulverized coal injection into blast furnace in Shougang[J]. China Metallurgy, 2019, 29(12): 7-13.

链接本文:

http://www.zgyj.ac.cn/CN/10.13228/j.boyuan.issn1006-9356.20190213 或 http://www.zgyj.ac.cn/CN/Y2019/V29/I12/7

[1]	竺维春,王冬青,马丽,等.喷吹煤结构与铁水成本寻优模型的应用[J].中国冶金,2018,28(5):12.
[2]	任燕,徐万仁,李军.高炉风口结渣机理的研究[J].炼铁,2004(3):23.
[3]	祁成林,张建良,贺鑫杰,等.太钢4 350 m3高炉喷吹清徐煤特性[J].北京科技大学学报,2011,33(1):80.
[4]	高鹏,赵丹宁,王平,等.马钢4 000 m3高炉喷吹煤粉燃烧性能研究与应用[J].钢铁,2018,53(12):10.
[5]	李寒旭,陈方林.配煤降低高灰熔融性淮南煤灰熔点的研究[J].煤炭学报,2002(5):529.
[6]	Li H X,Yoshihiko N,Dong Z,et al.Application of the FactSage to predict of ash melting behavior in reducing conditions[J].Chinese Journal of Chemical Engineering,2006,14(6):784.
[7]	任山,张建良,刘伟剑,等.高炉喷吹煤粉的灰熔融特性[J].钢铁研究学报,2012,24(10):11.
[8]	梁旺,王广伟,张建良,等.CaO对高钙烟煤熔融特性的影响[J].钢铁,2019,54(7):25.
[9]	王其,张建良,王广伟,等.配煤对煤灰熔融过程的矿物演变的影响[J].中国冶金,2018,28(5):7.
[10]	台培杰,袁海平,梁钦锋,等.煤灰和熔渣的熔融特性和黏温特性比较[J].华东理工大学学报:自然科学版,2010,36(6):765.
[11]	Jak E.Predication of coal ash fusion temperatures with the FACT thermodynamic computer package[J].Fuel,2002,81(13):1655.
[12]	芦涛,张雷,张晔,等.煤灰中矿物质组成对煤灰熔融温度的影响[J].燃料化学学报,2010,38(1):23.
[13]	Dyk J C V,Waanders F B,Benson S A,et al.Viscosity predictions of the slag composition of gasified coal,utilizing FactSage equilibrium modelling[J].Fuel,2009,88(1):67.
[14]	SONG W J,TANG L H,ZHU X D,et al.Prediction of Chinese coal ash fusion temperatures in Ar and H2 atmospheres[J].Energy and Fuels,2009,23(4):1990.