how to make portland cement

how to make portland cement

The Process for Making Portland Cement. Materials thatcontain appropriate amounts of calcium compounds,silica,alumina and iron oxide are crushed and screened and placed in a rotating cement kiln. Ingredients used in this process are typically materials such as limestone, sandstone, marl, shale, iron, clay, and fly ash. The kiln resembles a large horizontal pipe with a diameter of 10 to 15 feet (3 to …

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