Steel Scrap Melting Induction Furnace

Steel scrap melting induction furnace charging: Iron scrap can generally be divided into machined shredded material, construction shredded material, and baled scrap. When obtaining these materials, it is best to know their composition and to obtain written assurance regarding the material composition. Machined iron scrap is usually waste produced by punching, sawing, and similar processes. Since it has already been sorted at the point of generation, its chemical composition is clear and constant; the disadvantage is that it often contains residual lubricant.

Construction scrap iron also generally has a relatively clear and stable composition. A suitable particle size distribution should be guaranteed. From a metallurgical point of view, a relatively high nitrogen content may be a problem, often as high as 150 ppm (e.g., in rails). Particular attention should be paid to the increasingly common microalloyed steels, since their trace elements can lead to carbide inclusions and thereby hinder the formation of the graphite structure.

The quality of packaged scrap iron for Steel scrap melting induction furnace must be guaranteed by a quality agreement with the scrap recycler, because the internal condition of incoming material cannot be determined visually. In particular, the appearance of galvanized deep-drawn boxes represents a typical challenge. This is even more common against the background of today's rapid development of the automotive industry. Technically, solutions exist for melting such surface-coated scrap.

Steel scrap melting induction furnace charging: Unlike the situation with non-ferrous metals, under special metallurgical conditions pig iron only needs to serve as the primary iron carrier for the first melting. The proportion of pig iron used in electric furnace charging is usually relatively low, and has been declining continuously since the 1980s. Exceptions can be found when producing ferritic ductile iron or thick-walled NCI castings. Compared with scrap steel, the main advantage of pig iron lies in its low and known trace element content. Problems arise if suppliers are not careful enough with storage, because open-air storage leads to considerable moisture and rust. These ingots can only be charged using appropriate technology if slag formation is prevented to a certain extent (shortening the service life of the furnace lining of Steel scrap melting induction furnace).

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