FAILURE ANALYSIS OF ROLLERS OF BLOOM WITHDRAWAL STAND IN CONTINUOUS CASTING MACHINES AT VISAKHAPATNAM STEEL PLANT
Journal Title: International Journal of Management, IT and Engineering - Year 2012, Vol 2, Issue 8
Abstract
In Visakhapatnam Steel Plant, 6 Nos. continuous casting machines (CCM) are installed in Continuous Casting Complex. Each CCM is 12m radius and mould size is 320mmx250mm cross-section. Bloom withdrawal stands are used in continuous casting machines to withdraw and to support the bloom, as the bloom gets solidified from liquid state. Each stand consists of one bottom and one top roller. These bloom withdrawal stands work in a very high temperature zone and corrosion environment. The major problem in these stands is cracks formation on the surface of rollers and subsequent worn-out. Ever year about 70 to 80 rollers needs replacement or reclamation. This premature replacement/reclamation of casting rollers causes machine stoppages and reduces machine availability and incurs production loss and high maintenance cost. Therefore the failure analysis of these rollers carried out in this project, so that by controlling existing parameters to further increase of roller life.Based on the study it is found that roller surface temperature should be maintained below 3500c so that low thermal stresses are induced which leads to better life of casting roller. To reduce the scales formation inside the rollers, the water hardness has to be controlled by adding softeners Na2 Co3, and poly electrolytes solutions. At the time of reclamation of rollers, all rollers inside should be cleaned with acid solutions.
Authors and Affiliations
Prof N. V. Rachchh and Dr. R. K. Misra
Keywords
Related Articles
- EP ID EP18504
- DOI -
- Views 403
- Downloads 19
Design of Distributed System application on SOA, WPF, WF and WCF like new technologies: a Survey
In this paper, a Survey of Latest Technologies used in the Software companies based on the latest Service Oriented Architecture (SOA) ,Windows Presentation Foundation (WPF), Windows communication foundation (WCF), Wind...
Relationship between Portfolio management and Project management
The purpose of this research is to understand and quantify the impact of Portfolio Management on Project management and strength of interaction among them. A theoretical framework is proposed regarding the constructs o...
PONTIC MORPHOLOGY AS LOCAL RISK FACTOR IN ROOT DECAY AND PERIODONTAL DISEASE
Infections with various microorganisms are main cause of dental caries and periodontal disease [1].The types of fixed partial dentures includes all-metal, metal ceramic, and resin veneered metal prostheses.Some of the...
slugAN OPTIMAL DETECTION TECHNIQUE FOR MOBILE RADIO FREQENCIES
Cellular phone technology is rapidly changing. Features like Bluetooth, USB, high resolution cameras, microphones, Internet, 802.11 wireless, and memory cards are added every year. Also, the communication technology a...
A Relative Study of factors and approaches for Hindi Anaphora Resolution
A literature survey on theoretical approaches of anaphora resolution system and various factors among which these approaches are based is presented in this paper. From last two decades, the significant amount of work...