竖冷炉内烧结矿分布的DEM模拟

doi:10.13228/j.boyuan.issn1006-9356.20220044

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (3087 KB) HTML (0 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to study the permeability of sinter in vertical cooling furnace and improve the distribution of cooling gas, the slot model of single bin for vertical cooling furnace in Meigang was established. The charge and discharge process were simulated by discrete element method. Sinter and its porosity distribution in the vertical cooling furnace under steady-state conditions were obtained. The results show that during charging, the segregation distribution of sinter will occur due to the change of landing point. When the sinter flow is stable, there are three flow regions in the furnace cavity, quasi stationary region, mass flow region and convergent flow region. In terms of sinter distribution, the central area of furnace cavity contains more particles of 10-25 mm and 25-40 mm. More particles of 40-80 mm and 80-150 mm are distributed in the middle area. In the middle and upper part of the sidewall area, the mass fraction of 25-40 mm and 40-80 mm particles are higher, while the mass fraction of 80-150 mm particles in the lower part is higher. Such sinter distribution causes large particle segregation in the sidewall area and middle area of the furnace cavity, and small particle segregation in the center area. The porosity is distributed as "U" with larger in sidewall as well as central area, and smaller in middle area. Sinter in the sidewall area has the best air permeability, resulting in the easy escape of cooling gas from the sidewall area. In order to improve the distribution of cooling gas in the furnace, further research could be carried out from reducing the sinter size range and developing a new charge device.

Key words： sinter vertical cooling furnace discrete element method (DEM) size distribution porosity

Received: 17 January 2022

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	QI Teng-fei
	HUANG Jun
	SUN Jun-jie
	ZAHNG Yong-jie

Cite this article:

QI Teng-fei,HUANG Jun,SUN Jun-jie等. DEM simulation of sinter distribution in vertical cooling furnace[J]. China Metallurgy, 2022, 32(7): 20-26.

URL:

http://www.zgyj.ac.cn/EN/10.13228/j.boyuan.issn1006-9356.20220044 OR http://www.zgyj.ac.cn/EN/Y2022/V32/I7/20

[1]	GUO Z,FU Z. Current situation of energy consumption and measures taken for energy saving in the iron and steel industry in China[J]. Energy,2010,35(11):4356.
[2]	ZHANG X,CHEN Z,ZHANG J,et al. Simulation and optimization of waste heat recovery in sinter cooling process[J]. Applied Thermal Engineering,2013,54:7.
[3]	董辉,李磊,刘文军,等. 烧结矿余热竖罐式回收利用工艺流程[J]. 中国冶金,2012,22(1):6.
[4]	李含竹,高建业,冯军胜,等. 烧结矿余热回收竖罐内料层阻力特性实验研究[J]. 钢铁研究学报,2018,30(1):8.
[5]	FENG J S,ZHANG S,DONG H,et al. Frictional pressure drop characteristics of air flow through sinter bed layer in vertical tank[J]. Powder Technology,2019,344:177.
[6]	TIAN F Y,HUANG L F,FAN L W,et al. Wall effects on the pressure drop in packed beds of irregularly shaped sintered ore particles[J]. Powder Technology,2016,301:1284.
[7]	黄柱成,杨越,钟荣海,等. 热烧结矿竖式冷却过程传热特性[J]. 钢铁,2019,54(11):9.
[8]	黄连锋,田付有,厉青,等. 烧结矿立式冷却装置气固传热性能分析[J]. 浙江大学学报(工学版),2015,49(5):916.
[9]	ZHENG Y,DONG H,CAI J J,et al. Experimental investigation of volumetric heat transfer coefficient in vertical moving-bed for sinter waste heat recovery[J]. Applied Thermal Engineering,2019,151:335.
[10]	ZHANG S,ZHAO L,FENG J S,et al. Thermal analysis of sinter vertical cooler based on waste heat recovery[J]. Applied Thermal Engineering,2019,157:113.
[11]	高建业,刘一伟,冯军胜,等. 烧结矿余热回收中试竖罐结构和操作参数解析[J]. 钢铁研究学报,2017,29(1):13.
[12]	徐天骄,张晟,高建业,等. 烧结矿余热回收竖罐热工参数确定方法及其应用[J]. 钢铁,2018,53(11):107.
[13]	XU C,LIU Z,WANG S,et al. Numerical simulation and optimization of waste heat recovery in a sinter vertical tank[J]. Energies,2019,12(3):385.
[14]	XU W X,CHENG S C,NIU Q,et al. Investigation on the uneven distribution of different types of ores in the hopper and stock surface during the charging process of blast furnace based on discrete element method[J]. Metallurgical Research and Technology,2019,116(3):314.
[15]	WEI H,DING W T,LI Y,et al. Porosity distribution of moving burden layers in the blast furnace throat[J]. Granular Matter,2021,23:10.
[16]	ZHOU H,TIAN X,KOU M Y,et al. Numerical simulation of the effect of burden profile on gas flow in a COREX shaft furnace[J]. Powder Technology,2020,376:537.
[17]	KOU M Y,XU J,ZHOU H,et al. Effects of bottom base shapes on burden profiles and burden size distributions in the upper part of a COREX shaft furnace based on DEM[J]. Advanced Powder Technology,2018,29:1014.
[18]	杜斌斌,吴胜利,周恒,等. COREX竖炉结瘤对物料运动行为影响的DEM模拟[J]. 钢铁,2020,55(1):12.
[19]	ZHOU H,LUO Z G,ZOU Z S,et al. Experimental study on burden descending behavior in COREX shaft furnace with AGD beams[J]. Steel Research International,2015,86(9):1073.
[20]	张雪宽,徐骥,孙俊杰,等. 竖冷设备中烧结矿石偏析行为的GPU高性能模拟[J]. 力学学报,2019,51(1):64.