How to classify the raw materials of iron strapping by the method of obtaining

According to different smelting methods and equipment, steel can be divided into three types: () Open-hearth steel Steel smelted from an open-hearth furnace (Siemens-Martin furnace). It is generally alkaline, and only in special circumstances can it be refined in an acid open-hearth furnace. Open hearth steel has been eliminated at present. () Converter steel Steel smelted from a converter. In addition to being divided into basic and acid converter steels, it can also be divided into bottom-blown, side-blown and top-blown converter steels. These two categories are often mixed and used. For example, Bessemer converter steel is bottom-blown acid converter steel, and Thomas furnace steel is bottom-blown alkaline converter steel. At present, the largest production volume in my country is basic side-blown converter steel and top-blown oxygen converter steel. () Electric furnace steel Steel smelted by electric heating in an electric furnace. The molten steel does not come into contact with the fuel flame, it is easy to remove impurities, and the temperature is easy to accurately control. Therefore, its quality is very high, and superior quality steel can be smelted. Electric furnace steel can be divided into electric arc furnace steel, induction electric furnace steel (also called high-frequency electric furnace steel), vacuum induction electric furnace steel and electroslag furnace steel, and so on. Usually, mass production is based on alkaline electric arc furnace steel. According to the degree of deoxidation and the different pouring system, carbon steel can be divided into three types: boiling steel, killed steel and semi-killed steel. Alloy steel is generally killed steel.