Utilization of Cement Kiln Dust with Local Ores to Prepare Ceramic Building Materials

Abstract

Kiln dust material is collected during the manufacturing process of cement industry. It is considered as a waste material and poses environmental pollution. The properties of Kiln dust material depend on the kind of raw materials and fuel used. It is considered as a waste material This study focuses on the utilization the waste materials for ceramic products (bricks and tiles). The efficiency parameters (percentage of raw materials, additives, and firing temperature) during manufacture of the samples. Different amount of Kiln dust materials (20, 30 and 40) % were mixed with red kaolin clay and 10% (Na₂CO₃) is added to reduce firing temperature as a catalyst to prepare glassy phase. The samples were prepared by semi-dry press at a pressure 250 Kg/cm2 in two molds, cylinder (3.5 × 10 cm²) and square (5 × 5 cm²) for brick and tile respectively. Theses samples were dried at room temperature for 48 h. and at 110 °C for 24 hr. then, fired in muffle furnace at different firing temperatures (1050, 1100 and 1150 °C). The properties of ceramic materials after firing are produced a new material modifying in properties, and it is desirable stability of the product during the manufacture, as well as, firing temperature of the samples are very influential parameter on the physical and mechanical properties. Using kiln dust material with red kaolin clay, needs to high firing temperature up to 1150 °C, but the presence Na2CaCO3 in sample aid to decrease firing temperature to 1100 °C, with maintain requirement [1, 2, 3], fixing the addition of kiln dust material should not exceed 30%.