manu - Portland Cement Manufacture Dr. Kimberly Kurtis...

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Dr. Kimberly Kurtis School of Civil Engineering Georgia Institute of Technology Atlanta, Georgia Portland Cement Manufacture Key Steps 1. Selection and proportioning of raw materials 2. Grinding and blending of raw materials 3. Clinkering 4. Grinding of clinker 5. Addition of gypsum
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Raw Materials Portland cement is: 45-60% C 3 S 15-30% C 2 S 6-12% C 3 A 6-8% C 4 AF Anhydrite Calcium sulfate Gypsum Aluminum-ore refuse Bauxite Cement rock Clay Copper slag Fly ash Fuller’s earth Granodiorite Limestone Loess Ore washings Shale Slag Staurolite Calcium silicate Cement rock Clay Fly ash Fuller’s earth Loess Marl Ore washings Quartzite Rice-hull ash Sand Sandstone Shale Slag Traprock Blast-furnace flue dust Clay Iron ore Mill scale Ore washings Pyrite cinders Shale Alkali waste Aragonite Calcite Cement-kiln dust Cement rock Chalk Clay Fuller’s earth Limestone Marble Marl Seashells Shale Slag Sulfate Alumina Silica Iron Calcium Raw Materials
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Raw Materials Raw Materials
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CaO-SiO 2 Binary Phase Diagram CaO-Al 2 O 3 Binary Phase Diagram
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Raw Materials Grinding and Blending Because the objective is to fuse the raw materials at high temperature, but with energy conservation, the size of the raw materials is critical.
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manu - Portland Cement Manufacture Dr. Kimberly Kurtis...

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