ZHENGSHAN TECHNOLOGY

In the process of steelmaking in electric arc furnaces, the electrical conductivity of the electrode paste is essential.The following is the analysis of the electrical conductivity of the electrode paste：

1. Overview of the electrical conductivity of electrode paste

Electrode paste is a conductive material used in electric furnace equipment such as ferroalloy furnaces and calcium carbide furnaces. It is made of a mixture of petroleum coke, asphalt coke, coal asphalt and other raw materials. It is sintered at high temperature to form an electrode with good electrical conductivity.In the process of steelmaking in an electric arc furnace, the electrode paste needs to withstand high temperature and maintain stable electrical conductivity to ensure that the current can be smoothly input into the furnace to generate an arc for smelting.

2. Factors affecting the electrical conductivity of the electrode paste

Fixed carbon content: Fixed carbon is the main component of electrode paste, which directly affects the conductivity and high temperature resistance of the electrode.The higher the fixed carbon content, the better the electrical conductivity of the electrode paste.
Ash: Ash is a non-carbon residue in the electrode paste. The lower the content, the higher the purity and conductivity of the material.
Volatile components: Volatile components in electrode paste refer to components that will evaporate at high temperatures, including moisture, light organic matter, etc.Moderate volatiles contribute to the bonding and forming of the electrode, but too high volatiles may lead to pores and electrode cracks, thereby affecting the electrical conductivity.
Sulfur content: Sulfur is a harmful impurity that may cause the electrode to become brittle at high temperatures. Its content needs to be strictly controlled to ensure electrical conductivity.
Resistivity: Resistivity is the main index of the electrical conductivity of the electrode paste. A lower resistivity indicates that the electrode paste has good electrical conductivity.The resistivity is closely related to the chemical composition, microstructure and preparation process of the electrode paste.

3. Measures to improve the electrical conductivity of electrode paste

Optimize the ratio of raw materials: By adjusting the ratio of petroleum coke, asphalt coke, coal asphalt and other raw materials, the fixed carbon content is increased, and the ash and volatile components are reduced, thereby improving the electrical conductivity of the electrode paste.
Strictly control the preparation process: In the preparation process of the electrode paste, strictly control the temperature, pressure and other process parameters to ensure that the microstructure of the electrode paste is uniform and dense, reduce the generation of pores and cracks, and improve the electrical conductivity.
Strengthen quality inspection: conduct regular quality inspections of electrode pastes, including fixed carbon, ash, volatile content, sulfur content, resistivity and other items, to ensure that the quality of electrode pastes meets the requirements of the standards.

4. The application of electrode paste conductivity in electric arc furnace steelmaking

In the process of steelmaking in electric arc furnaces, the electrical conductivity of the electrode paste directly affects the smelting efficiency and the quality of steel.Good electrical conductivity can ensure that the current is smoothly input into the furnace, produce a stable arc, and improve the smelting efficiency.At the same time, the high temperature resistance and chemical stability of the electrode paste also help to reduce the consumption of electrodes and extend the service life, thereby reducing production costs.

In summary, the electrical conductivity of electrode paste plays a vital role in the steelmaking process of electric arc furnace.Through measures such as optimizing the ratio of raw materials, strictly controlling the preparation process, and strengthening quality inspection, the electrical conductivity of the electrode paste can be effectively improved to ensure the smooth progress of steelmaking in electric arc furnaces.