English to German Tech/Engineering Construction / Civil Engineering Aufbereitung von Gießereisand

Now we discuss supplementary matters. Assume that used core sand is used to produce foamed mulled sand. If a lot of water-shedding foreign substances or binders adhere to the particles of the core sand, more of a blowing agent, water, or inorganic liquid-crystal binders are required compared to green sand. Thus the time required to take a product out of a mold after casting becomes long. Further, an odor may be generated. These are disadvantages. Thus by a method in which a lot of incrustations remain on the surfaces of the particles of core sand, it is difficult to repeatedly reuse core sand.