Manufacturing Of Portland Cement – Process And Materials
Stage of Cement Manufacture. There are six main stages of cement manufacturing process. Stage 1 Raw Material Extraction Quarry. The raw cement ingredients needed for cement production are limestone (calcium), sand and clay (silicon, aluminum, iron), shale, fly ash, mill scale and bauxite. The ore rocks are quarried and crushed to smaller pieces of about 6 inches.Cement plants are generally located adjacent to raw material quarries to minimize transportation costs (BGS, 2014 van Oss Padovani, 2002). Water and crushed rock, sand, and gravel, which are used as aggregates, are the main raw materials used in PC concrete manufacturing. Approximately 6 of CMs cycle emissions arise from extraction. 3.2.