Why is the electricity consumption of electric arc furnace steelmaking high? What are the reasons that caused it? Let's analyze them together below.

① In terms of raw material conditions.

The scrap steel used in electric furnace steelmaking often requires the use of lightweight materials, pressed blocks, and other raw materials, which can easily lead to high feed rates and thermal shutdown, resulting in significant heat loss. In the case of insufficient loading, a second feeding is required, and in some cases, there have been instances of three feeding, which has also increased heat loss. Each additional charge (with an average charge time of 5 minutes) increases power consumption by approximately 7-12kW-h/t. In addition, after raw material cleaning, it was found that C and P were relatively high. When entering the oxidation period, the removal of C and P will require a longer time and higher energy consumption.

② In terms of operator skills.

The power consumption during the melting period accounts for 60% -70% of the total power consumption, and the electricity is mainly wasted after the cleaning process. Among them The common phenomenon is blind slag flow during the dephosphorization process during the oxidation period, which wastes a large amount of lime and energy.

③ The limitations of objective conditions.

During the process of refining in Taiwan, there was a sudden occurrence of power outages and restrictions due to a shortage of electricity. Over time, the molten steel cooled and solidified, requiring further melting, which wasted a significant amount of electricity.

④ Other unexpected accidents.

If the operator operates improperly and breaks the electrode, a large amount of heat will be lost during the electrode processing. When entering the reduction period to take the reduction sample, if the composition is found to be unqualified, secondary oxidation must be carried out, which will also consume a lot of heat energy. In the smelting process, the middling coal oxygen burner leaks water, which interrupts the melting aid; When hanging materials on the furnace wall, it is necessary to open the furnace cover for processing, which to varying degrees delays the smelting time and increases heat loss.

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