Research of grain composition batch influence on alumina-zirconium silicate and alumina-chromia-zirconium silicate refractories properties

Comparative researches of grain composition batch influence with electrofusion corundum aggregate with a maximum grain size 2.0 mm or 1.0 mm on properties of alumina-zirconium silicate KTSS brand and alumina-chromia-zirconium silicate KCHTSS-30 and KCHTSS-15 brands refractories were carried out. It was established that, from batches with maximum grain size 2.0 mm and fraction content < 0.5 mm 20 % it is possible to obtain refractories with properties that approximate to the properties of refractories from batches with maximum grain size 1.0 mm and fraction content < 0.5 mm 10 %. It was shown that, for the manufacture of alumina-chromia-zirconium silicate refractories from optimal grain composition batches it is advisable to use metallurgical and pigment chromic oxide in the ratio of 2 : 1 or complete replacement of chromic oxide with mud, forming during mechanical treatment of chrome oxide refractory products. The developed compositions of batches make possible to increase efficiency of using electrofusion corundum in the manufacture of alumina-zirconium silicate and alumina-chromia-zirconium silicate refractories. Obtained results are used at making of products for glass melting furnace of industrial lining for fiberglass production from E glass.