15 / 20
I n t e r n a t i o n a l C o n f e r e n c e o n
Metal, Mining and
Magnetic Materials
Journal of Material Sciences
ISSN: 2321-6212
N o v e m b e r 0 1 - 0 2 , 2 0 1 8
P a r i s , F r a n c e
Metal and Magnetism 2018
Page 39
Meijie Zhang et al., J Mat. Sci. 2018, Volume:6
DOI: 10.4172/2321-6212-C7-032
T
he properties of refractories have great effect on the quality of steel,
energy consumption and cost of steelmaking. In this paper, the influence of
micropore alumina aggregates on the properties of Al2O3-MgO castable used
in lade working lining was studied, and the energy saving ladle lining materials
were designed. The results showed that the bulk density of Al
2
O
3
-MgO castable
prepared by micropore alumina aggregates was reduced by 7.5%, the strength
was increased by more than 40%, the thermal conductivity at 1000 ∏ was
reduced by 19%, and the thermal shock stability was increased by one time.
When reacting with the Basic Oxygen Furnace (BOF) end slag, the CaO-Al
2
O
3
phases were formed and interlaced distributed in the micropores, and a dense
layer at the interface of slag and castable was formed which prevented further
infiltration and erosion of the molten slag. The Al
2
O
3
-MgO castable prepared
by micropore alumina aggregates was designed as the working lining in the
ladle, the light castable as the permanent lining and the nanoporous material
as heat insulation lining, the out shell temperature can be reduced to 200 ℃
below. The Al
2
O
3
-MgO castable prepared by micropore alumina aggregates
was used in the 300t ladle in Wisco steel, and showed less damaged than the
common used castable under the same conditions. Moreover, the microporous
corundum aggregates showed good potential to improve the thermal shock
stability using in the slab, nozzle and other refractories
Biography
Meijie Zhang has completed her PhD specialized in material
science and metallurgy engineering in 2006 from Wuhan
University of Science andTechnology and senior visiting scholar
researches specialized in the new concept of heat transfer
from Tsinghua University school of aerospace engineering
in 2007. She is a professor of Wuhan University of Science
and Technology. She has published more than 50 papers in
reputed journals and more than 20 China patents. Her research
interests cover mathematical and physical simulation of the
application and wear of refractories, preparation of energy
saving refractories.
zhangmeijie@wust.edu.cnEnergy saving and service life improvement of ladle linings
using micro pore alumina aggregate
Meijie Zhang, Huazhi Gu and Lvping Fu
Wuhan University of Science and Technology, China