2 research outputs found
DEVELOPMENT OF FLUORINE-FREE MOULD FLUX APPLIED IN LOW CARBON STEEL
ract
The mould flux is a mixture of non-metallic oxides that, in contact with liquid steel melts, becomes a liquid slag
which the mainly function is to lubricate and control heat transfer between mould and strand during the continuous
casting process. The mould flux without fluoride has the advantage of decreasing the wear of machine and the SEN in
comparison to common mould flux. The application in Continuous Casting of Slabs has been a great challenge in relation
to the operational viability together with internal and surface quality of slabs. Another differential is the decrease of
environmental issues on account of the contamination of secondary cooling water by the fluorides. It is considered that
properties of mould flux as chemical composition, viscosity, softening, melting flowing temperatures, fusion rate, etc,
should be suitable to the chemical composition and the mechanical properties at elevated temperatures of steel and
also the operational parameters such as casting temperature, casting speed, mould frequency, among others. This work
presents a preliminary analysis in relation to operational viability, analysis of surface quality of slabs, measurements of
fluorides content in the water of secondary cooling of machine. In addition to that, the analyses of operational features as
measurements of wear of SEN, mould flux consumption, slag pool and behavior of thermocouples of detection system
break outs (MSD) are considered