The main raw materials for cement production are limestone, clay and iron ore powder. Am I right?
The main raw materials for cement production are limestone, clay and iron ore, gypsum and slag.The main raw materials for cement clinker production are limestone, clay and iron ore powder.
So the raw materials generally used limestone, sandstone, shale, sulfuric acid residue (iron) ingredients, limestone, clay, iron ore powder ingredients can be used in shaft kiln production, but now it belongs to the type of kiln kiln eliminated, the mainstream method is not now used for cement production.
Now the new dry production requires high silica, clay, difficult to meet the requirements, so they need to add sandstone ingredients, clay as raw materials use silicon aluminum, but also a lot of clay water is high, the use of clay is unfavorable to ecological protection, so it is generally not used, instead of using shale or fly ash residue.
