Industrial tests of composite plates with baddeleyite inserts and bushes for sliding gates

Abstract

The use of sliding gates in steel--teeming ladles ensures reliable pouring of metal ~ad improves the working conditions [1,2]. Mullite-corundum, corundum, and zircon plates, magnesian plates with a periclase working layer [2][3][4][5][6][7][8][9][10], and magnesite plates with a periclase insert are used in sliding gates.The muIlite-corundum plates in use at the Donetsk Metallurgical Works (DMW) for pouring steel into molds from 170-140 ton ladles, and the magnesite plates with a periclase working layer on MNLZ, permit pouring of only one melt [5]. Although steel pouring through a sliding gate is definitely advantagenous from the aspect of organization and improvement of working conditions, it is only economically advantageous when not less than 60% of the refractories of the sliding gate are used twice [4].

Fusing baddeleyite in an electric arc furnace

“…The use of refractories made of zirconia show its advantages over those based on AI~O3 and MgO, namely the low erodibility and the absence of the fault of being overgrown by contaminants [2,[7][8][9][10][11][12][13]. Thus, according to [2,13], on continuous steel casting plant MNLZ we can ensure the accident-free casting of steel through one feeder made of zirconia for up to 5-6 heats (200-800 tons of steel).…”