Paper Title:
Mold Thermocouple Locations and their Impact on Prevention of Caster Breakouts
  Abstract

With advances in mold instrumentation, high performance mold fluxes, better reliability maintenance procedures, and improved operating practices, there has been a significant decline in the number of unplanned caster breakouts experienced at various production facilities. The typical breakouts of stickers and flux entrapments that were frequently observed in the past is often detected using embedded thermocouples in the mold and automatic slowdowns are initiated which inhibit excessive tearing of the partially solidified shell and prevent subsequent breakouts. However, in-mold events still occur resulting in caster downtime. Many of these occasional events have been linked to bleeders along the corners of the slabs, slab joint defects during tundish changes, and longitudinal face cracking. Considering the potential costs associated with unplanned caster breakouts, improvements have been made in the existing breakout prevention system. Major modifications of this existing breakout prevention system included, in particular, the addition of bleeder thermocouples or edge thermocouples which made possible the detection of shell containment loss near the corners of the slab. These bleeder thermocouples can also be utilized in detecting bad tundish joints related to excessive cooling and corner contraction that lead to tundish change joint defect type breakouts. In addition, changes in the location of the existing embedded thermocouples to a staggered-design extended the detection range of the breakout prevention system without increasing the total number of thermocouples.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
394-397
DOI
10.4028/www.scientific.net/MSF.654-656.394
Citation
I. Sohn, A. Sinha, "Mold Thermocouple Locations and their Impact on Prevention of Caster Breakouts", Materials Science Forum, Vols. 654-656, pp. 394-397, 2010
Online since
June 2010
Authors
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hui Rong Li, Li Gen Sun, Li Qun Ai
Chapter 17: Materials Processing Technologies and Joint
Abstract:Breakout is the most detrimental event associated with the continuous casting process, with the overview of the breakout prevention system, a...
1292
Authors: Md Obaidullah Ansari, Rajashree Samantray, Joyjeet Ghose
Chapter 2: Technologies of Materials Processing in Manufacturing Engineering
Abstract:— Continuous casting of steel is a process in which liquid steel is continuously solidified into semi-finished or finished product (slabs,...
550