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how to make portland cement

how to make portland cement

The Process for Making Portland Cement. Materials that contain appropriate amounts ofcalcium compounds, silica, alumina andiron oxideare 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. Thekilnresembles a large horizontal pipe with a diameter of 10 to 15 feet (3 to 4.1 …

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