The calcium carbide slag is first washed with water to remove the ferrosilicon lump, and the coal, loess, and iron slag are sent to the mud mill at a weight ratio of 16:16:5, and water is continuously added during the grinding. Then, the calcium oxide-containing slurry is evenly prepared from the calcium carbide slag and the mud, dehydrated, dried, and crushed, and then shaped into a ball of a certain size, sent to the shaft kiln, calcined, crushed, and ground into cement.
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