Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 25    No. 3    March 2015

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Numerical simulation of fluid dynamics in rare earth chloride solution in jet-flow pyrolysis reactor
Chao Lü1,2, Qiu-yue ZHAO, Zi-mu ZHANG1, Zhi-he DOU1, Ting-an ZHANG1, Hong-liang ZHAO1

1. Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores, Ministry of Education,
School of Materials and Metallurgy, Northeastern University, Shenyang 100819, China;
2. Northeast Petroleum University at Qinhuangdao, Qinhuandao 066004, China

Abstract:Rare earth oxide was prepared via direct pyrolysis of rare earth chloride solution. Based on this technique, a new-type jet-flow pyrolysis reactor was designed, and then the fluid dynamics (pressure and velocity) inside the reactor was numerically simulated using a computational fluid dynamics method. The self-produced pressure (p) and the fuel inlet velocity (v) satisfied a quadratic function, p=0.06v2+0.23v-4.49. To fully utilize the combustion-generated heat in pyrolysis of rare earth chloride, an appropriate external pressure p=v2+3v-4.27 should be imposed at the feed inlet. The 1.25- and 1.5-fold increase of feed inlet diameter resulted in decline of adsorption dynamic pressure, but the intake of rare earth chloride increased by more than 30% and 60%, respectively. The fluid flow in the reactor was affected by the feeding rate; the fluid flow peaked near the throat of venturi and gradually smoothed down at the jet-flow reactor’s terminal along with the sharp decline of feeding rate.

 

Key words: numerical simulation; rare earth chloride; jet-flow; pyrolysis reactor

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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