A mullite compound for combined lining of steel teeming ladles

Results of the discussion

“…2 Converter Shop of Novolipetsk Metallurgical Combine in the use of type MMK-88 compound from Semiluki Plant in 350-ton steel teeming ladles [4]. investigations [5] established that addition of 10% of crushed grinding wheels for the purpose of economy in alumina does not have a detremental effect on the service properties of the compound.Tests of mullite-corundum parts in 150-ton steel teeming ladles of the Electric Malt Shop of Oskol' Electrometallurgical Combine showed [6] that the life of unfired and fired refractories is practically the same and increases by 20-30% with the addition of chrome ore.in [7] the advantages of Kazakh Refractory Plant type MK-90 corundum compound in the service of the wells and bottoms of Cherepovets Metallurgical Combine steel teeming ladles were shown. In the opinion of the authors this is the result of the fact that the compound does not contain clay and the presence of finely dispersed corundum provides higher density and strength in comparison with mullite compounds.…”

“…This is preceded by a study of the service conditions and an evaluation of the resistance of specimens of refractories to slags and metal, which is done by the crucible method at 1650~ with a hold of 2 h. Investigations conducted using this method [2] showed the desirability of use under the conditions of treatment and teeming of metal in the Converter Shop of Azov Steel Combine of periclase-chromite parts for lining the slag belt and bottom of ladles. Type MMK-65 mullite compound developed by the authors of [3], the production of which has been introduced at Velikoanadol Combine similarly to the compound produced by Semiluki Plant, was used in their walls.…”