气淬作用下熔渣粒化机理及破碎效果分析

doi:10.12068/j.issn.1005-3026.2023.10.008

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (10): 1424-1430.DOI: 10.12068/j.issn.1005-3026.2023.10.008

气淬作用下熔渣粒化机理及破碎效果分析

刘晓宏¹，温治¹，肖永力²，楼国锋¹

(1. 北京科技大学能源与环境工程学院，北京100083; 2. 宝山集团中央研究院能源与环境研究所，上海201999)

发布日期:2023-10-27
通讯作者: 刘晓宏
作者简介:刘晓宏(1998-)，男，山西忻州人，北京科技大学博士研究生；温治(1962-)，男，河北张家口人，北京科技大学教授，博士生导师.
基金资助:
国家重点研发计划项目(2017YFB0304303).

Analysis of Slag Granulation Mechanism and Crushing Efficiency Under Gas Quenching

LIU Xiao-hong¹， WEN Zhi¹， XIAO Yong-li²， LOU Guo-feng¹

1. School of Energy and Environmental Engineering， University of Science and Technology Beijing， Beijing 100083， China； 2. Institute of Energy and Environment， Baosteel Central Research Institute， Shanghai 201999， China.

Published:2023-10-27
Contact: LOU Guo-feng
About author:-
Supported by:
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摘要/Abstract

摘要： 针对熔渣气淬粒化工艺，在实验的基础上开展了气淬作用下的熔渣粒化过程数值模拟.利用VOF模型追踪自由界面、Realizable κ-ε模型处理湍流流动.模拟得到了气淬熔渣粒化过程，并分析了熔渣破碎机理.进一步建立了无量纲数局部动量比，对熔渣的黏度及气渣局部动量比进行了影响因素分析.结果表明:熔渣存在两种破碎形式，一种为R-T不稳定性所产生的柱状破碎，主要由渣流迎风面和背风面存在的局部高压区所导致；另一种为K-H不稳定性主导的表面液膜破碎，其主要由气渣界面间的速度梯度所引起.熔渣黏度的增加会使熔渣的颗粒粒径增大，破碎效果降低；气渣局部动量比的增大增强了熔渣的表面液膜波动，使剥离的颗粒数量增多，破碎长度减小，熔渣破碎效果加强.

关键词: 气淬粒化；表面波；局部动量比；数值模拟；高炉熔渣

Abstract: Aiming at the granulation of slag under gas quenching， the numerical simulations of the slag granulation process under gas quenching is carried out on the basis of experiments. The VOF model is used to track the free interface and the Realizable κ-ε model is used to deal with the turbulent flow. The granulation process of gas-quenched slag is simulated and the mechanism of slag fragmentation is analyzed. The dimensionless local momentum ratio is then further established and the influence factors of slag viscosity and gas-slag local momentum ratio are analyzed. The results showed that there are two forms of slag fragmentation under gas quenching. One is the columnar fragmentation caused by R-T instability， mainly caused by local high pressure zones on the windward and leeward sides of the slag flow. The other is surface liquid film breakage dominated by K-H instability， which is mainly caused by the velocity gradient at the gas-slag interface. The increase of slag viscosity will increase the particle size of the slag and decrease the crushing efficiency. The increase of the local momentum ratio enhances the liquid film fluctuations on the surface of the molten slag， and thereby increase the number of stripped particles， reduce the fragmentation length， and enhance the fragmentation efficiency of the molten slag.

Key words: gas quenching granulation; surface wave; local momentum ratio; numerical simulation; blast furnace slag

中图分类号:

TF534.3

刘晓宏，温治，肖永力，楼国锋. 气淬作用下熔渣粒化机理及破碎效果分析[J]. 东北大学学报（自然科学版）, 2023, 44(10): 1424-1430.

LIU Xiao-hong， WEN Zhi， XIAO Yong-li， LOU Guo-feng. Analysis of Slag Granulation Mechanism and Crushing Efficiency Under Gas Quenching[J]. Journal of Northeastern University(Natural Science), 2023, 44(10): 1424-1430.

参考文献

[1]Du C M，Gao X，Kitamura S Y.Measures to decrease and utilize steelmaking slag［J］.Journal of Sustainable Metallurgy，2019，5(1):141-153.
[2]Gao J，Feng Y H，Feng D L，et al.Solidification with crystallization behavior of molten blast furnace slag particle during the cooling process［J］.International Journal of Heat and Mass Transfer，2020，146:118888
[3]Zhang H，Wang H，Zhu X，et al.A review of waste heat recovery technologies towards molten slag in steel industry［J］.Applied Energy，2013，112:956-966.
[4]Wang D X，Ling X，Peng H.Theoretical analysis of free-surface film flow on the rotary granulating disk in waste heat recovery process of molten slag［J］.Applied Thermal Engineering，2014，63(1):387-395.
[5]孔德文，张建良，郭伟行，等.高炉渣处理技术的现状及发展方向［J］.冶金能源，2011，30(5):55-60.(Kong De-wen，Zhang Jian-liang，Guo Wei-xing，et al.The present situation and development direction of blast furnace slag treatment technology［J］.Energy for Metallurgical Industry，2011，30(5):55-60.)
[6]Rodd L，Koehler T，Walker C，et al.Economics of slag heat recovery from ferronickel slags［C］ // Sustainability for Profit.Vancouver:Conference of Metallurgists(COM2010)，2010:3-17.
[7]康月，刘超，张玉柱，等.气淬法粒化高炉渣实验研究［J］.东北大学学报(自然科学版)，2020，41(2):212-216.(Kang Yue，Liu Chao，Zhang Yu-zhu，et al.Experimental study on granulation of blast furnace slag by gas quenching［J］.Journal of Northeastern University(Natural Science)，2020，41(2):212-216.)
[8]高洁，冯妍卉，冯黛丽，等.风淬作用下液态熔渣的离心粒化［J］.工程热物理学报，2021，42(5):1288-1292.(Gao Jie，Feng Yan-hui，Feng Dai-li，et al.Centrifugal granulation of liquid slag under air quenching［J］.Journal of Engineering Thermophysics，2021，42(5):1288-1292.)
[9]Wang L L，Zhang Y Z，Long Y，et al.Experimental investigation on granulation characteristics and waste heat recovery of molten slag in gas quenching dry granulation technique ［J］.Applied Thermal Engineering，2020，184:116295.
[10]常浩.高炉熔渣喷射粒化模拟实验及凝固放热分析［D］.济南:山东建筑大学，2014:23-30.(Chang Hao.Simulation experiment and solidification heat release analysis of blast furnace slag granulation ［D］.Jinan:Shandong Jianzhu University，2014:23-30.)
[11]Liu N，Wang Z G，Sun M B，et al.Simulation of liquid jet primary breakup in a supersonic crossflow under adaptive mesh refinement framework［J］.Aerospace Science and Technology，2019，91:456-473.
[12]Menard T，Tanguy S，Berlemont A.Coupling level set/VOF/ghost fluid methods:validation and application to 3D simulation of the primary breakup of a liquid jet ［J］.Multiphase Flow，2007，33:510-524.
[13]Pan Y，Witt P J，Kuan B，et al.CFD modelling of effects of operating parameters on the spreading of liquids on a spinning disc ［J］.The Journal of Computational Multiphase Flows，2014，6(1):49-64.
[14]张彬，成鹏，李清廉，等.液体横向射流在气膜作用下的破碎过程［J］.物理学报，2021，70(5):230-241.(Zhang Bin，Cheng Peng，Li Qing-lian，et al.Breaking process of liquid transverse jet under the action of gas film［J］.Acta Physica Sinica，2021，70(5):230-241.)
[15]Wang L L，Zhang Y Z，Long Y，et al.Simulation of primary breakup of molten slag in the gas quenching dry granulation process［J］.Applied Thermal Engineering，2020，181:115850.
[16]刘晓宏，温治，杜宇航，等.气淬粒化熔渣液膜破碎过程研究［J］.中南大学学报(自然科学版)，2022，53(8):2851-2860.(Liu Xiao-hong，Wen Zhi，Du Yu-hang，et al.Study on liquid film breaking process of gas quenched granulated slag［J］.Journal of Central South University(Science and Technology)，2022，53(8):2851-2860.)
[17]李春，沈赤兵，李清廉，等.超声速气流中液体横向射流一次破碎过程［J］.国防科技大学学报，2019，41(4):73-78.(Li Chun，Shen Chi-bing，Li Qing-lian，et al.Primary breakup process of liquid jet in supersonic crossflow［J］.Journal of National University of Defense Technology，2019，41(4):73-78.)

气淬作用下熔渣粒化机理及破碎效果分析

Analysis of Slag Granulation Mechanism and Crushing Efficiency Under Gas Quenching

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