| Heating and melting mechanism of stainless steelmaking dust pellet in liquid slag |
| |
| 作者姓名： | 彭及 唐谟堂 彭兵 余笛 J. A. KOZINSKI 唐朝波 |
| |
| 作者单位： | School of Metallurgical Science and Engineering Central South University，School of Metallurgical Science and Engineering，Central South University，School of Metallurgical Science and Engineering，Central South University，School of Information Science and Engineering，Central South University，Department of Metallurgical Engineering，McGill University，3610 University Street，Montreal，H3A 2B2，Canada，School of Metallurgical Science and Engineering，Central South University，Changsha 410083，China，Changsha 410083，China，Changsha 410083，China，Changsha 410083，China，Changsha 410083，China |
| |
| 摘 要： | The heating and melting mechanisms of the pellets immersed in liquid slag were investigated, and the effect of the pellet heating and the melting conditions were studied. The results show that the dust component in the pellet is melted from the surface and no metallic elements are melted before the dust component, the time for the pellet completely melted is reduced as the iron powder content increases since the metallic iron has high thermal conductivity. These are four stages of heating and melting of pellet in liquid slag, they are the growth and melt of solid slag shell, penetration of liquid slag, dissolving of dust component and melting of reduced metals. The lifetime of the solid slag shell is in the range of 7-16 s and increasing the pre-heating temperature of the pellet and the slag temperature can shorten the slag shell lifetime. The time for the dust component in the pellet to be melted completely is in the range of 20-45 s and increasing the pre-heating temperature, especially in the range of 600-800 ℃, can obviously reduce the melting time. A higher slag temperature can also improve the pellet melting and the melting time is reduced by 10-15 s when the slag temperature is increased from 1 450 to 1 550 ℃. The pellet with higher content of iron powder is beneficial to the melting by improving the heat conductivity.
|
| 关 键 词： | 加热机制 融化机制 不锈钢粉末 再循环 |
| 收稿时间： | 25 May 2006 |
| 修稿时间： | 2006-05-25 |
Heating and melting mechanism of stainless steelmaking dust pellet in liquid slag |
| |
| Peng Ji , Tang Mo-tang , Peng Bing , Yu Di , J. A. Kozinski and Tang Chao-bo.Heating and melting mechanism of stainless steelmaking dust pellet in liquid slag[J].Journal of Central South University of Technology,2007,14(1):32-36. |
| |
| Authors: | Peng Ji Tang Mo-tang Peng Bing Yu Di J A Kozinski and Tang Chao-bo |
| |
| Affiliation: | 1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China; 2. School of Information Science and Engineering, Central South University, Changsha 410083, China; 3. Department of Metallurgical Engineering, McGill University, 3610 University Street, Montreal, H3A 2B2, Canada |
| |
| Abstract: | The heating and melting mechanisms of the pellets immersed in liquid slag were investigated, and the effect of the pellet
heating and the melting conditions were studied. The results show that the dust component in the pellet is melted from the
surface and no metallic elements are melted before the dust component, the time for the pellet completely melted is reduced
as the iron powder content increases since the metallic iron has high thermal conductivity. These are four stages of heating
and melting of pellet in liquid slag, they are the growth and melt of solid slag shell, penetration of liquid slag, dissolving
of dust component and melting of reduced metals. The lifetime of the solid slag shell is in the range of 7–16 s and increasing
the pre-heating temperature of the pellet and the slag temperature can shorten the slag shell lifetime. The time for the dust
component in the pellet to be melted completely is in the range of 20–45 s and increasing the pre-heating temperature, especially
in the range of 600–800 °C, can obviously reduce the melting time. A higher slag temperature can also improve the pellet melting
and the melting time is reduced by 10–15 s when the slag temperature is increased from 1 450 to 1 550 °C. The pellet with
higher content of iron powder is beneficial to the melting by improving the heat conductivity.
Foundation item: Project(50274073) supported by the National Natural Science Foundation of China; project(Metallurgy 2003, CRDPJ 210038) supported
by Natural Sciences and Engineering Research Council of Canada |
| |
| Keywords: | heating melting mechanism stainless steelmaking dust recycling |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
|
