7TH EUROPEAN COKE AND IRONMAKING CONGRESS - ECIC 2016

The life of a coke oven is greatly influenced by its design and the quality of brickwork construction& uniformity of physical, chemical and thermo-mechanical properties. Earlier, while selecting the quality of silica bricks, importance were being given to conventional properties like Apparent Porosity, Bulk Density, Cold Crushing Strength, Permanent Linear Change, Refractoriness under Load and Specific Gravity only. Subsequently creep, Reversible Thermal Expansion and Residual Quartz were considered relevant. Different types of silica bricks are required to design various portions of coke oven battery to increase its effectiveness and environmental needs. The Silica refractories used for sole area are normally of dense quality with apparent porosity around 16%.Different methods are adopted during manufacturing of dense bricks, for example high forming pressure and special additives. In this paper studies are being made to correlate the physical & thermo-mechanical properties of dense silica bricks with its behavior towards creep & thermal expansion at different temperatures. RQ content of different bricks are studied for expansion behavior along with microscopic study to trace desired mineralogical phases present; for concluding the best suitable dense silica bricks.