Evaluation of the performance of mold powder for continuous casting of plate slabs
Evaluation of the performance of mold powder for continuous casting of plate slabs作者机构：Steelmaking Plant Baoshan Iron ＆ Steel Co.Ltd. Shanghai 201900 China College of Materials Science and Engineering Chongqing University Chongqing 400044 China
出 版 物：《Baosteel Technical Research》 (宝钢技术研究（英文版）)
年 卷 期：2009年第3卷第4期
页 面：36-40页
学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 0802[工学-机械工程] 080201[工学-机械制造及其自动化]
主 题：continuous casting slab mold powder longitudinal cracks
摘 要：The No. 3 slab caster,which mainly provides slabs to the 5000 mm plate mill at Baosteel, was put into production in December,2004. The size of the biggest slab produced by this caster is 2300 mm in width and 300 mm in thickness. The designed output of the caster is 2.3 Mt/a. Slab surface longitudinal crack defects,which were related to the heat flux of the mold, frequently occurred in the early stage of the startup of the caster. As mild cooling powder is beneficial to the uniformity of the shell of initial slabs ,the concentration of stress is reduced, and the longitudinal cracking on the surface is avoided. This study evaluates the performance of several kinds of powder, and the results show that mold powder of high basicity, high crystallization proportion and low heat flux is to the benefit of the reduction of the longitudinal cracks on the surface and the defects of slabs.
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