Abstract
This paper provides an evaluation of commercial castable refractories by the crucible corrosion test for possible use in secondary lead smelting short rotary furnace; one mullite-zirconia fused grain and two alumina-chrome based on white and brown fused alumina were compared to five commercial burned magnesia-chromite bricks. All products were supplied by refractory Brazilian manufacturers. After the corrosion tests, the slag penetration area of the samples was measured and the refractory-slag castables interface was analyzed by Scanning Electron Microscopy (SEM), Energy Dispersive Analysis (EDS) and X-Ray diffractometry. The performance of the castables was not higher than the standards burned magnesia-chromite bricks normally used in this application. Nevertheless the good slag attack resistance of alumina-chrome castable based on white fused alumina shows the use castable refractory to be very promising.
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