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水泥是混凝土的最重要的组成部分。此处所讲的是它的生产过程。粘土与白垩是水泥工业的主要原料,它们在破碎机内被轧碎之后,和以一定数量的清水在特设的搅拌机内搅拌,使之成为浓密的泥浆。为了把泥浆磨细,使之进入磨机,由磨机经过贮泥池而入回转窑。这种回转窑长达一百公尺,窑里的温度达摄氏1500度左右,它所用的燃料(煤粉、重油)是以特型的喷雾器喷进去的。泥浆顺着倾斜的回转窑而下,去掉了潮气,变成坚硬的粒状物——鎔滓。
Cement is the most important component of concrete. What is said here is its production process. Clay and chalk are the main raw materials for the cement industry. After they are crushed in the crusher, they are stirred in a special blender with a certain amount of fresh water to make it a dense slurry. In order to grind the slurry into the mill, the mill passes through the storage tank into the rotary kiln. This rotary kiln is up to 100 meters in length. The temperature in the kiln is about 1500 degrees Celsius. The fuel (pulverized coal, heavy oil) used in the kiln is sprayed with a special sprayer. The mud went down the inclined rotary kiln, removing the moisture and turning into a hard granular material - squatting.