Refractories have a crucial impact on the cost and quality of steel products. The diversification of steel products and their purity requirements in recent years have increased the demand for high quality refractories. Steel-making requires high temperatures of 1600℃. In addition, steel-making involves chemically reactive high temper phases like molten steel, slag and hot gases, which necessitates the use of refractories. Since the cost of refractory adds into the cost of the product, high quality refractory at a cheaper cost is the main requirement.