ZHENGSHAN TECHNOLOGY

In the process of steelmaking in electric arc furnaces, the electrical conductivity of the electrode paste is one of the key indicators to evaluate its quality and use effect.The following is the analysis of the electrical conductivity of the electrode paste：

1. The importance of the electrical conductivity of the electrode paste

In the process of steelmaking in electric arc furnaces, electrode paste is used as a conductive material, and its conductive properties directly affect the transmission efficiency of electrical energy and the service life of the electrode.The excellent electrical conductivity can reduce the electrical energy loss when the current passes through the electrode and improve the smelting efficiency.At the same time, good electrical conductivity also helps to reduce the oxidation and consumption of the electrode and extend the service life of the electrode.

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.High ash content may cause the electrical conductivity of the electrode to decrease.
Sulfur content: Sulfur is a harmful impurity that may cause the electrode to become brittle at high temperatures, thereby affecting its electrical conductivity.Therefore, the sulfur content in the electrode paste needs to be strictly controlled.
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 size of the resistivity is related to factors such as the chemical composition, microstructure, and preparation process of the electrode paste.
Particle size: The uniformity of the particle size distribution of the electrode paste will also affect its electrical conductivity.Particles that are too large or too small may cause defects in the electrode during molding and sintering, thereby affecting its electrical conductivity.

3. Measures to improve the electrical conductivity of electrode paste

Optimize the electrode paste formula: By adjusting the proportion of fixed carbon, ash, sulfur content and other chemical components in the electrode paste, and selecting the appropriate particle size distribution, the electrical conductivity of the electrode paste can be optimized.
Improve the preparation process: The use of advanced preparation technology and equipment, such as high temperature kneading, homogenization treatment, etc., can improve the uniformity and density of the electrode paste, thereby improving its electrical conductivity.
Strengthen quality inspection: conduct strict quality inspection of the electrode paste, including the determination of fixed carbon, ash, volatile content, sulfur content, particle size, softening point, adhesion, moisture content, compressive strength, flexural strength, coefficient of thermal expansion, thermal conductivity, resistivity and conductivity indicators to ensure that the quality of the electrode paste meets the requirements of use.

4, The detection method of the electrical conductivity of the electrode paste

Resistivity measurement: The resistivity of the electrode paste is measured by the four-probe method or the bridge method to evaluate its electrical conductivity.
Conductivity measurement: Use a conductivity meter to measure the conductivity of the electrode paste and verify its conductivity.Conductivity is the reciprocal of resistivity, which directly reflects the current conduction ability of the electrode.

In summary, the electrical conductivity of the electrode paste plays a vital role in the steelmaking process of electric arc furnaces.By optimizing the electrode paste formula, improving the preparation process, strengthening quality testing, and adopting scientific testing methods, the electrical conductivity of the electrode paste can be significantly improved, thereby improving smelting efficiency, reducing production costs, and extending the service life of the electrode.