1.1 The quality of steel scrap is poor or the ratio is not proper

Poor steel scrap quality or improper ratio leads to poor slagging effect and prolonged smelting time; with the increase of feed times and drilling data, the probability of electrode bottom damage and fracture increases. The extension of smelting time is the direct factor leading to the increase in electric energy consumption and electrode consumption and loss.

1.2 The electric furnace power supply equipment does not match the electrode specification

Electric arc furnaces operate at high currents and low voltage. If the capacity of the power supply equipment is too large and exceeds the limit load of the electrode, the electrode will turn red from bottom to top within 5~10 minutes of arcing, the connection boundary is very obvious, and most of the fracture accidents will occur; if the current is too large or the fluctuation is too large, the preposition connection The fracture frequency increases, and the bottom consumption is tapered. If the power supply capacity is low, the furnace temperature cannot meet the process requirements within the effective heating time of the medium, and the operation will be delayed. The wear and consumption of graphite electrodes are greatest during overload and overtime operation.

1.3During the oxidation period, the chemical energy and smelting strength are forcibly increased

 Smelting is forced to increase oxygen blowing (generally less than 45M3/T) to achieve rapid melting and increase furnace temperature, which will easily lead to poor furnace conditions and a rich fire state in the furnace so that the electrodes of each phase are in high-temperature flames. In this furnace condition, The electrodes will be many serious plating and surface oxidation.

 1.4 Technical configuration and operational for electric furnace

There are fundamental differences between traditional electric furnaces and modern electric arc furnaces.

The emergence of ultra-high power, large-scale electric arc furnaces, and hot charging steelmaking process has improved the smelting intensity and production capacity, thus putting forward higher technical requirements for the quality of graphite electrodes. Selection of power transmission curve and gear position during operation, control of arc starting and stable arc voltage and current, use of long, medium, and short arc, and matching of water cooling system.

1.5 Graphite electrode quality

At present, electric furnace smelting and technology have more and more requirements on the oxygen resistance and thermal shock resistance of graphite electrodes, and the high consumption caused by quality fluctuations has attracted the attention of direct users. Therefore, in determining consumption the balance and stability of graphite electrode quality play the most important factors.