1. How to choose the electrode correctly in the electric arc furnace steelmaking?

According to the design characteristics of the electric arc furnace, the electrode that meets the production of the electric arc furnace is selected reasonably, and the product with the best cost performance is selected. It is very necessary to carefully select the electrode suitable for each furnace. The special performance of the steel furnace, the feeding method, the maximum current intensity, the length of the electrode column under the holder, the distance between the side wall of the furnace and the electrode circumference, etc. It is a factor that must be considered when choosing an electrode for an electric arc furnace.

2. What effect does the resistivity performance have on the use of electrodes in steelmaking?

The resistivity of a graphite electrode is a physical index that reflects the electrical conductivity of the electrode. It is related to the manufacturing process of the electrode. The country has qualitatively specified values for the resistivity of graphite electrodes of different specifications. Generally speaking, steel plants are choosing certain specifications. When the electrode is used, the resistivity must be within the range of the national metallurgical standards. Too high resistivity will cause the electrode to become red and hot when it is energized, and increase the electrode's oxidation consumption.

3. What effect does the volume density performance have on the use of electrodes in steelmaking?

The volume density of the graphite electrode reflects the compact state of the electrode, which is closely related to the manufacturing process of the electrode. The country has specified values for the volume density of graphite electrodes of different specifications and varieties. Products with low bulk density indicate that the overall structure of the product has a higher porosity, and the oxidation rate of the product is faster when the product is high temperature, which will easily cause the electrode consumption to increase. Generally speaking, when the steel plant chooses the electrode, it is better for the electrode bulk density to be within the specified value. However, the higher the bulk density is not the better, because some electrodes with too high bulk density are sometimes prone to surface peeling, chipping and cracking during steelmaking due to poor thermal shock resistance, which will affect steelmaking.

4. When steel mills use graphite electrodes, why should they prevent multiple products from being mixed?

Graphite electrodes used in steel mills are often supplied by multiple manufacturing companies. When multiple products are used in steelmaking, it will not only make it difficult for the steel mills to calculate the consumption of a single product, but also due to the different raw materials and manufacturing processes used by each manufacturer. , The physical and chemical properties and machining tolerances of electrodes and joints of various manufacturers have certain differences. Therefore, the matching tolerances generated during the mixed use can easily cause the electrodes to fall off and break off. The correct way to use is to use the products of one manufacturer alone, and then connect to the products of another manufacturer after the end. It is necessary to reduce the number of electrode replacements using different manufacturers. Electrodes from the same manufacturer should use the connectors provided by the same manufacturer to prevent mixing.