The Role of SiC and Different Binders on Mechanical Strength and Compaction of Silica Based Refractories Materials

Silica refractory bricks are used especially in the metallurgical industries, due to desirable properties suchas high melting point, rigidity, and high temperatures strength. In this research, different amount of SiCwere added to Silica refractory containing different binders such as Borax, Boric acid, Calcium nitride,Sodium tri poly phosphate, Sodium hexa meta phosphate (SHMP) and lime. Physical properties (densityand porosity), mechanical properties (cold crush strength, CCS) and microstructure were studied. Thisstudy indicated that SiC improves the physical and mechanical properties. In general, increasing SiCwith different binders improve the mechanical and compaction in the sles. Silica refractory slecontaining 20 %wt. SiC and 5 % wt. borax as a binder had the best results of mechanical strength andcompaction. In this sle, glassy phases fill the voids and increase temperature between particles. Infact, glass phase formation increases compaction, density, and strength.