Steelmaking equipment and smelting method for steelmaking by steel scrap

Abstract

The invention discloses steelmaking equipment and a smelting method for steelmaking by steel scrap. The steelmaking equipment for steelmaking by steel scrap comprises an induction warming shaft (2), an electric arc furnace (1) and a steel scrap preheating chamber (5), wherein open cylindrical structures are arranged at the upper and lower ends of the induction warming shaft (2), and the inductionwarming shaft (2) can carry out electromagnetic induction heating on furnace charge in the induction warming shaft (2); the lower part of the induction warming shaft (2) is hermetically connected to the electric arc furnace (1); and the outlet of the steel scrap preheating chamber (5) is correspondingly connected to the inlet of the induction warming shaft (2). The steelmaking equipment and a smelting method for steelmaking by steel scrap disclosed by the invention combine efficient steel scrap preheating, induction warming, electric arc smelting, primary energy source smelting and secondary combustion and change the single energy supply mode of a conventional electric arc furnace which is only supplied by an electrode, so that the problem that conventional steel scrap steelmaking processand device are low in heat efficiency, high in steel consumption, great in soot amount and large in impact to a power grid.

Description

Technical field [0001] The invention relates to the field of smelting, in particular to a steelmaking equipment that uses scrap steel to make steel, or a smelting method that uses scrap steel to make steel. Background technique [0002] At present, the technology and equipment for steelmaking with scrap steel mainly include two kinds of intermediate frequency induction furnace and electric arc furnace. Among them, the intermediate frequency induction furnace cannot be used for large-scale steelmaking because it cannot be used for oxygen blowing and slagging to adjust the composition of molten steel. It is only allowed to be used in special metallurgical enterprises with small batches and multiple varieties of raw materials from internal circulation. On the other hand, the traditional electric arc furnace mainly relies on high-temperature electric arc to melt scrap and heat molten steel. The electric arc damages the scrap and makes the melting noise. It requires a large amount of ...

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Problems solved by technology

[0003] In order to solve the problem of low thermal efficiency of traditional steel scrap steelmaking process

The invention provides a steelmaking equipment and smelting method for steelmaking with scrap steel. The steelmaking equipment and smelting method for steelmaking with scrap steel combine high-efficiency scrap steel preheating, induction heating, arc melting, primary energy smelting and secondary combustion phases. Combined, it changes the single energy supply mode of the traditional electric arc furnace that only relies on electrodes for power supply, thus effectively solving the problems of low thermal efficiency of the traditional scrap steelmaking process and equipment, high consumption of steel materials, large amount of smoke and dust, and large impact on the power grid

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