Heavy Scrap cutting
Heavy scrap consists of large ingots of iron castings with a thickness of up to 2000 mm, solidified metal from intermediate and steel-making pads of continuous casting machines, solidified slag with an iron content of 60 to 80%, complex bulk prefabricated metal structures such as pipe heat exchangers, bundles of pipes and sheets, pressed packets of scrap metal with large voids inside, reinforced concrete structures.
In addition to the fact that this is simply a large thickness and a special technology for cutting large thickness is required, characterized in that for uniform heating of metal of large thickness, two-flame metallurgical nozzles are used, which provide a minimum temperature difference between the upper and lower edges of the metal being cut, and cutting at low cutting pressure oxygen, so as not to overcool the cutting zone, it is also necessary to add special fluxes to the cutting zone to improve the oxidative reaction of iron.
The use of conventional oxy-fuel cutting technology for cast iron, stainless steels, non-ferrous metals and slags is impossible due to the insufficient amount of iron in their composition. Therefore, the so-called oxygen-flux cutting is used. Fine iron powder is fed into the cutting zone, which, by reacting with oxygen, raises the temperature of the melt zone to almost 4000 K, as a result of which the base metal begins to melt and the kinetic energy of oxygen and flux blows it out of the cutting zone.
With the help of this technology, it is possible to cut not only complex scrap with a thickness of one meter or more, but even reinforced concrete.
For cutting super-thick scrap (from 1000 to 2500 mm) with a high content of non-metallic inclusions, the so-called bark cutting is used, where an iron tube is used as a spear, into which iron powder is fed.
Plazmamax provides oxy-fuel and plasma-cutting equipment used to produce trusses, bridges, cranes, railways, power lines, fencing lights, and wagons. Our equipment can also be used to construct oil and metallurgical plants, with the added benefit of applying high-quality protective, anti-corrosion coatings.