2 research outputs found
Effect of spinel content on slag attack resistance of high alumina refractory castables
High alumina refractory castables based on the Al2O3-MgO-CaO diagram ternary system were prepared using tabular alumina, white electrofused
corundum, calcined alumina, synthetic spinel, dead-burned magnesia, dolomite, and calcium aluminate cement as starting raw materials. Two kinds
of slags with 9.02 and 4.14 CaO/SiO2 ratios were studied for slag resistance by means of crucible tests. The corrosion thickness increases with
increase in magnesia content in all the designed compositions. The slag penetration decreases with increases in spinel content. Taking into account
these results a refractory castable composition for its positioning into a steelmaking ladle was chosen.
Microstructural studies by SEM of samples taken from the slag line and wall in a steelmaking ladle were carried out. The correct amount of
spinel required for practical applications was determined by the Al2O3-MgO-CaO-SiO2 diagram quaternary system. A detailed model of the attack
mechanisms is proposed.Peer reviewe
Effect of spinel content on slag attack resistance of high alumina refractory castables
High alumina refractory castables based on the Al2O3-MgO-CaO diagram ternary system were prepared using tabular alumina, white electrofused
corundum, calcined alumina, synthetic spinel, dead-burned magnesia, dolomite, and calcium aluminate cement as starting raw materials. Two kinds
of slags with 9.02 and 4.14 CaO/SiO2 ratios were studied for slag resistance by means of crucible tests. The corrosion thickness increases with
increase in magnesia content in all the designed compositions. The slag penetration decreases with increases in spinel content. Taking into account
these results a refractory castable composition for its positioning into a steelmaking ladle was chosen.
Microstructural studies by SEM of samples taken from the slag line and wall in a steelmaking ladle were carried out. The correct amount of
spinel required for practical applications was determined by the Al2O3-MgO-CaO-SiO2 diagram quaternary system. A detailed model of the attack
mechanisms is proposed.Peer reviewe