Abstract
This work considers a method to increase the mechanical strength and corrosion resistance to glass and slag melts of aluminosilicate refractories. For this purpose, artificial ceramic binders (ACB) of mullite-carborundum composition were synthesized using the technology of highly concentrated ceramic binder suspensions (HCCBS). The morphological characteristics and grain size of ACB were analyzed, and the structure and physico-mechanical properties of the sintered products were investigated. It was found that nanodispersed particles are formed as a result of mechanochemical processes occurring during joint grinding. The average particle size was about 30 – 40 nm. Thermally treated samples based on high-alumina chamotte consist of crystalline phases of corundum, mullite, and SiC, which are uniformly distributed in the material. It is shown that with an increase in the annealing temperature, the physico-mechanical properties improve. The introduction of mullite-carborundum binder into the composition of high-alumina chamotte refractories has led to improved physico-mechanical properties and corrosion resistance to glass and slag melts. The results showed that refractories containing 50 % high-alumina chamotte possess the most favorable physico-mechanical properties. Compared to the factory sample, experimental samples demonstrated a significant improvement in corrosion resistance to glass and slag melts by 90 % and 94 %, respectively.
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