文章摘要
Simulation Study on Material Movement and Heat Transfer in Waste Rubber Cracking Process
Received:December 26, 2019  Revised:December 26, 2019
DOI：10.12136/j.issn.1000-890X.2020.11.0854
Key Words: waste rubber；cracking；material movement；heat transfer；rolling motion mode；recycling medium；EDEM software
Author NameAffiliationE-mail
YIN Fengfu Qingdao University of Science and Technology zqx_112@163.com 
ZHUANG Qianxiao* Qingdao University of Science and Technology zqx_112@163.com 
XU Yanhui Qingdao University of Science and Technology  
ZHANG Chao Qingdao University of Science and Technology  
TIAN Xiaolong Qingdao University of Science and Technology  
WANG Chuansheng Qingdao University of Science and Technology  
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Abstract:
      The structure of pyrolysis rotary kiln was analyzed，and a mathematical model of movement of waste rubber cracking material particle（rubber material） was established. The formula for the influence of helix angle，length and rotation speed of the rotary kiln body on the residence time of the rubber materials was obtained，and the theoretical rotational speed range of the kiln body was obtained when the rubber material was in the rolling motion mode under full retention in the rotary kiln. The particle mechanics simulation software （EDEM software） was used to simulate the rubber material rotation in the kiln，the kiln body rotational speed with the best mixing degree of the rubber material was obtained. The influence of the zirconia ball as the recycling medium on the rubber material movement and heat transfer was analyzed by comparing the rubber material movement state. It could be inferred that the heat transferring effect of butadiene rubber in the rotary kiln at 300 ℃ was the best，followed by bromobutyl rubber，and the natural rubber and styrene-butadiene rubber were poor，during the waste rubber cracking process in the rotary kiln.
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