Simulation on particle movement and pulverized coal jet combustion of titano-magnetite pellets during the reduction with coal in rotary kiln

Liu Peng; Yu Wenchao; Gong Siyu; Liu Bingguo; Zhang Libo; Peng Jinhui

doi:10.7513/j.issn.1004-7638.2021.04.017

Volume 42 Issue 4

Aug. 2021

Turn off MathJax

Article Contents

Article Navigation > IRON STEEL VANADIUM TITANIUM > 2021 > 42(4): 97-104

Liu Peng, Yu Wenchao, Gong Siyu, Liu Bingguo, Zhang Libo, Peng Jinhui. Simulation on particle movement and pulverized coal jet combustion of titano-magnetite pellets during the reduction with coal in rotary kiln[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 97-104. doi: 10.7513/j.issn.1004-7638.2021.04.017

Citation:

Liu Peng, Yu Wenchao, Gong Siyu, Liu Bingguo, Zhang Libo, Peng Jinhui. Simulation on particle movement and pulverized coal jet combustion of titano-magnetite pellets during the reduction with coal in rotary kiln[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 97-104. doi: 10.7513/j.issn.1004-7638.2021.04.017

Citation:

Liu Peng, Yu Wenchao, Gong Siyu, Liu Bingguo, Zhang Libo, Peng Jinhui. Simulation on particle movement and pulverized coal jet combustion of titano-magnetite pellets during the reduction with coal in rotary kiln[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 97-104. doi: 10.7513/j.issn.1004-7638.2021.04.017

PDF( 1247 KB)

Simulation on particle movement and pulverized coal jet combustion of titano-magnetite pellets during the reduction with coal in rotary kiln

doi: 10.7513/j.issn.1004-7638.2021.04.017

Liu Peng^{1, 2
,},
Yu Wenchao^{1, 2},
Gong Siyu^{1, 2},
Liu Bingguo^{1, 2
,
,},
Zhang Libo^{1, 2},
Peng Jinhui^{1, 2}

1.
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
2.
Yunnan Provincial Key Laboratory of Intensification Metallurgy, Kunming 650093,Yunnan, China

Received Date: 2021-05-14
Publish Date: 2021-08-10

Abstract

Abstract

In this paper, the numerical simulation of on particle movement and pulverized coal injection combustion duringin the coal coal-based reduction of titano-magnetite pellets in rotary kiln was carried out. The results show that there were delamination phenomenon and discrete pile phenomenon in the movement process of three kinds of particles in rotary kiln. The discrete particle piles led to the axial periodic fluctuation distribution of particle number. Combined with the change of reaction enthalpy, the average fluctuation energy in a single period was deduced as $\tilde {{E}}$ = 25.58 MJ; in the process of pulverized coal injection combustion, the fuel jet would form a rebound effect under the action of gravity, and the length of the action zone was about 2 m. The mass and heat transfer process in this zone was strengthened, and the local overheating phenomenon was readily to occur. The energy fluctuation and local overheating could be reduced by the way of attaching carbon with coal powder on the surface of ore pellets and mixing carbon with external coal pellets. The amount of carbon distribution by adhering to ore particles is about 18.9 g/kg.
- titanomagnetite,
- rotary kiln,
- reduction,
- simulation,
- particle movement,
- pulverized coal jet combustion

FullText(HTML)

References(28)

References

[1]	Guo X, Dai S, Wang Q. Influence of different comminution flowsheets on the separation of vanadium titano-magnetite[J]. Minerals Engineering, 2020,149:106−177.
[2]	Chen J, Chen W, Mi L, et al. Kinetic studies on gas-based reduction of V anadium titano-magnetite pellet[J]. Metals, 2019,9:145−158. doi: 10.3390/met9020145
[3]	Hu T, Lv X, Bai C, et al. Reduction behavior of Panzhihua titanomagnetite concentrates with coal[J]. Metallurgical and Materials Transactions B, 2013,44B:252−260.
[4]	Jiang T, Yu Z, Peng Z, et al. Preparation of BF burden from titanomagnetite concentrate by composite agglomeration process (CAP)[J]. ISIJ International, 2015,55:1599−1607. doi: 10.2355/isijinternational.ISIJINT-2015-094
[5]	Jiang T, Wang S, Guo Y, et al. Effects of basicity and MgO in slag on the behaviors of smelting vanadium titanomagnetite in the direct reduction-electric furnace process[J]. Metals, 2016,6:1−10.
[6]	Fu W, Wen Y, Xie H. Development of intensified technologies of vanadium-bearing titanomagnetite smelting[J]. Journal of Iron and Steel Research, International, 2011,18:7−10.
[7]	Wang S, Guo Y, Jiang T, et al. Behavior of titanium during the smelting of vanadium titanomagnetite metallized pellets in an electric furnace[J]. JOM, 2019,71:323−328. doi: 10.1007/s11837-018-2932-y
[8]	Gan M, Sun Y, Fan X, et al. Preparing high-quality vanadium titano-magnetite pellets for large-scale blast furnaces as ironmaking burden[J]. Ironmaking & Steelmaking, 2018,139:149−158.
[9]	Zeng R, Li W, Wang N, et al. Influence and mechanism of CaO on the oxidation induration of Hongge vanadium titanomagnetite pellets[J]. ISIJ International, 2020,142:1−10.
[10]	Hu T, Lv X, Bai C, et al. Carbothermic reduction of titanomagnetite concentrates with ferrosilicon addition[J]. ISIJ International, 2013,53:557−563. doi: 10.2355/isijinternational.53.557
[11]	Liu P, Zhang L, Liu B, et al. Determination of dielectric properties of titanium carbide fabricated by microwave synthesis with Ti-bearing blast furnace slag[J]. International Journal of Minerals, Metallurgy and Materials, 2021,28:88−91. doi: 10.1007/s12613-020-1985-4
[12]	Yang J, Tang Y, Yang K, et al. Leaching characteristics of vanadium in mine tailings and soils near a vanadium titanomagnetite mining site[J]. Journal of Hazardous Materials, 2014,264:498−504. doi: 10.1016/j.jhazmat.2013.09.063
[13]	Zeng R, Li W, Wang N, et al. Effect of Al₂O₃ on the gas-based direct reduction behavior of Hongge vanadium titanomagnetite pellet under simulated shaft furnace atmosphere[J]. Powder Technology, 2020,376:342−350. doi: 10.1016/j.powtec.2020.08.043
[14]	Chen D, Zhao L, Liu Y, et al. A novel process for recovery of iron, titanium, and vanadium from titanomagnetite concentrates: NaOH molten salt roasting and water leaching processes[J]. Journal of Hazardous Materials, 2013,(244−245):588−595.
[15]	Adetoro A, Sun H, He S, et al. Effects of low-temperature pre-oxidation on the titanomagnetite ore structure and reduction behaviors in a fluidized bed[J]. Metallurgical and Materials Transactions B, 2018,49B:846−857.
[16]	Dang J, Zhang G, Hu X, et al. Non-isothermal reduction kinetics of titanomagnetite by hydrogen[J]. International Journal of Minerals, Metallurgy and Materials, 2013,20:1134−1139. doi: 10.1007/s12613-013-0846-9
[17]	Geng C, Sun T, Yang H, et al. Effect of Na₂SO₄ on the embedding direct reduction of beach titanomagnetite and the separation of titanium and iron by magnetic separation[J]. ISIJ International, 2015,55:2543−2549. doi: 10.2355/isijinternational.ISIJINT-2015-420
[18]	Du Q, Mo H, Tian L, et al. A preliminary control system on a barium sulphide rotary kiln process[J]. IEEE Computer Society, 2010,142:286−290.
[19]	Atmaca A, Yumrutas R. Analysis of the parameters affecting energy consumption of a rotary kiln in cement industry[J]. Applied Thermal Engineering, 2014,66:435−444. doi: 10.1016/j.applthermaleng.2014.02.038
[20]	Mu J, Leder F, Park W C, et al. Reduction of phosphate ores by carbon: Part I. process variables for design of rotary kiln system[J]. Metall. Mater. Trans. B, 1986,17B:861−868.
[21]	Boateng A A. Rotary kilns-transport phenomena and transport processes[M]. 2nd Edition. Elsevier, 2016.
[22]	Zhao S, Zhou X, Liu W. Discrete element simulations of direct shear tests with particle angularity effect[J]. Granular Matter, 2015,17:793−806. doi: 10.1007/s10035-015-0593-x
[23]	Yakhot V, Orszag S A. Renormalization group analysis of turbulence[J]. Journal of Scientific Computing, 1986,1:3−49. doi: 10.1007/BF01061452
[24]	Wang S, Lu J, Li W, et al. Modeling of pulverized coal combustion in cement rotary kiln[J]. Energy & Fuels, 2006,20:2350−2356.
[25]	Escotet-Espinoza M, Foster C, Ierapetritou M. Discrete element modeling (DEM) for mixing of cohesive solids in rotating cylinders[J]. Powder Technology, 2018,335:124−136. doi: 10.1016/j.powtec.2018.05.024
[26]	Ndiaye L, Caillat S, Chinnayya A, et al. Application of the dynamic model of saeman to an industrial rotary kiln incinerator: Numerical and experimental results[J]. Waste Management, 2010,30:1188−1195. doi: 10.1016/j.wasman.2009.09.023
[27]	Ding Y, Wang J, She X, et al. Reduction characteristics and kinetics of bayanobo complex iron ore carbon bearing pellets[J]. Journal of Iron and Steel Research, International, 2012,20:28−33.
[28]	Zhou L, Zeng F. Reduction mechanisms of vanadium-titanomagnetite-non-coking coal mixed pellet[J]. Ironmaking and Steelmaking, 2011,38:59−64. doi: 10.1179/030192310X12816231892549