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Severstal is mastering the technology of working with a high proportion of pig iron on a new electric arc furnace

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The Cherepovets Iron and Steel Works (CherMK, part of the Severstal Russianstal division) is launching a new electric arc furnace with a high iron consumption of 75-85%. This is one of the most important technological features of the unit, which ensures the efficiency of its operation.

“We are faced with the task of quickly mastering the technology of operation using a high proportion of liquid iron in order to make the most of the key advantage of the new equipment. However, in addition to operating in the mode of a small converter, the unit can function as a traditional steel-arc furnace, where the melting process proceeds due to the thermal effect of the electric arc. The flexible technology of the furnace allows us to optimize the consumption of electricity and graphite electrodes, due to which we can reduce the production cost, minimize the company's dependence on the volatile market and increase energy efficiency, ”commented Evgeny Vinogradov, General Director of the Severstal Russian Steel Division and the company's resource assets.

To reach the specified modes, a series of experimental melting was carried out. The production process during the operation of the furnace with a high proportion of cast iron is provided by powerful injectors and a supersonic lance. In addition, DSP-1 is equipped with a special tilting device, thanks to which the cast iron is poured in automatic mode.

The technological process at DSP-1 is carried out in accordance with the requirements of environmental legislation. The gas cleaning and aspiration equipment of the unit complies with which allows to achieve the purification of waste gases and other process emissions to the level of compliance with modern environmental standards (10 mg /m3) and to achieve the standard values ​​of maximum permissible concentrations at workplaces.

For reference:

Electric arc furnace No. 1 is a unit unique for the Russian metallurgy with a capacity of 1.3 million tons per year. It combines the capabilities of an electric arc furnace and a small volume converter. The cost of the investment project is 3.3 billion rubles.

Daieli (Italy) was the supplier of basic engineering and basic technological equipment.

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