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| 1. |
What are the raw materials needed for the cement industry? (Geography) |
| Answer» Cement\xa0is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients. Common\xa0materials\xa0used to manufacture\xa0cement\xa0include limestone, shells, and chalk or marl combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore.\xa0Limestone is the\xa0primary raw material for the cement industry\xa0and important for smelting iron\xa0ore\xa0in the blast furnace. | |