Mould Powder Benchmarking for Peritectic Grade of Steel at Tata Steel
The product surface quality of a peritectic slab casting is heavily dependent on the performance of mould powder used for casting. A good mould powder ensures proper lubrication and thermal insulation during continuous casting; therefore the choice of a correct mould powder for the peritectic range is one of the crucial parameters for Peritectic slab casting. At present several plant trials are needed to obtain an understanding on the behaviour of mould powder, however, these plant trials not only incur significant operational costs but also associated with a great risk of caster damages (break out, mould wear and stoppages). Moreover it has been noticed that a chosen mould powder behaves differently even within its known working composition range. Several online and offline plant monitoring were undertaken at various Tata Steel Europe and India plants, and several samples of steel lollypops, raw mould fluxes, slag films and slag rims were collected. Data on casting powder, slag pool depth, oscillation marks and surface quality of different monitored casts have been analysed. Mould powder characterisation techniques such as viscosity measurement, Simultaneous Thermal Analysis, Metallography, chemical analysis have also been used for this benchmarking exercise. A high alumina pickup on the top slag layer along with pick-up and losses of different compounds were observed. Online pickup and loss of compounds such as alumina, calcium oxide, silica, zirconia found to have influenced the mould powder properties.
mould powder benchmarking differential scanning calorimetry viscosity
P P Sahoo A Dey
Research and Development, Tata Steel Ltd, Jamshedpur, 831001, India Teesside Technology Centre, Tata Steel Europe, Middlesbrough, UK, TS6 6US
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-6
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）