2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 1: D'Abreu Intl. Symp. / Iron and Steel Making
| Editors: | Kongoli F, Noldin JH, Takano C, Lins F, Gomez Marroquin MC, Contrucci M |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 320 pages |
| ISBN: | 978-1-987820-37-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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The Performance Comparison Of Oxidation Resistance Between Powdery And Blocky Carbon Brick Used In Blast Furnace Hearth
Liu Fujun1; Ning Xiaojun1; Jian-liang Zhang2; Kexin Jiao1; Liu Yanxiang1; Zhao Yongan3;1UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, Beijing, China; 2SCHOOL OF METALLURGICAL AND ECOLOGICAL ENGINEERING, UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, Beiijing, China; 3HENAN WINNA INDUSTRIAL GROUP CO.,LTD., Gongyi, China;
Type of Paper: Regular
Id Paper: 39
Topic: 2
Abstract:
Within the thermodynamically possible experiment condition, the oxidation performance experiments of the powdery and blocky carbon brick were conducted in air at the temperature of 800¡æ, 1000¡æ and 1200¡æ to study their oxidation behavior and oxidation kinetics in both non-isothermal and isothermal condition. The results showed that, in terms of the non-isothermal experiment, the weight loss of carbon brick and the rate of oxidation reaction were small below 500¡æ. However, the rate of oxidation reaction increased after temperature over 500¡æ. The relationship between weight loss and temperature was approximate linearity with the fitting equation of y=121.78+0.92(T-500), and the correlation coefficient of R2=0.9978. In terms of the isothermal experiments, the weight loss rate of both powdery and powdery cylindrical carbon brick increased with increasing temperature, indicating that the rate-controlling step was an interfacial reaction, while the weight loss rate of blocky carbon brick was unaffected by temperature, indicating that rate-controlling step was diffusion. At the same temperature, the rate data comparison of oxidation reaction between three samples was Vpowder>Vcylindrical>Vblock. Relatively speaking, due to the fastest rate of powder, once the carbon brick in the blast furnace is pulverized, the erosion will speed up significantly, thus declining its original strength.