uhp 450 mm graphite electrodes

The consumption mechanism of uhp 450 mm graphite electrodes in Ulan Qab

The consumption of Ulan Chabu uhp 450 mm graphite electrodes in electric furnace steelmaking is mainly related to the quality of uhp 450 mm graphite electrodes itself, and also to the furnace conditions of steelmaking (such as new and old furnaces, whether there are mechanical failures, whether continuous production, etc.) It has a lot to do with steelmaking operations (such as steel type, oxygen blowing time, charge conditions, etc.).

Here we only discuss the consumption of uhp 450 mm graphite electrodes themselves. The consumption mechanism has the following aspects:

1. The end consumption includes the sublimation of graphite material caused by the high temperature of the arc and the loss of the chemical reaction between the end of the uhp 450 mm graphite electrodes and the molten steel and slag. The end high temperature sublimation rate mainly depends on the current density through uhp 450 mm graphite electrodes, and secondly, it is related to the diameter of the side of uhp 450 mm graphite electrodes after oxidation. The end consumption is also related to whether uhp 450 mm graphite electrodes are inserted into molten steel to increase carbon. Related.

2. The chemical composition of side oxidation uhp 450 mm graphite electrodes is carbon. Under certain conditions, carbon will oxidize with air, water vapor and carbon dioxide. The side oxidation amount of uhp 450 mm graphite electrodes is related to the unit oxidation rate and exposure area. . In general, the side oxidation of uhp 450 mm graphite electrodes accounts for about 50% of the total consumption of uhp 450 mm graphite electrodes. In recent years, in order to increase the smelting speed of electric furnaces, the frequency of oxygen blowing operations has been increased, resulting in an increase in the oxidation loss of uhp 450 mm graphite electrodes. In the steelmaking process, the redness of the trunk and the taper of the lower end of the uhp 450 mm graphite electrodes are often observed. This is an intuitive way to measure the oxidation resistance of the uhp 450 mm graphite electrodes.

3. Stump loss. When uhp 450 mm graphite electrodes are continuously used to the connection of the upper and lower uhp 450 mm graphite electrodes, a small section of uhp 450 mm graphite electrodes or connectors (ie residues) are thinned or cracks penetrated due to the oxidation of the body. Detached. The size of the stub loss is related to the shape of the connector, the internal structure of the uhp 450 mm graphite electrodes, and the vibration and impact of the uhp 450 mm graphite electrodes.

4. The surface peeling and falling off are caused by the rapid heat and cold during the smelting process, the result of the poor thermal vibration resistance of the uhp 450 mm graphite electrodes themselves.

5. The fracture of uhp 450 mm graphite electrodes includes the fracture of the trunk and the connector of uhp 450 mm graphite electrodes. The breaking of uhp 450 mm graphite electrodes is related to the quality and processing cooperation of uhp 450 mm graphite electrodes and connectors, as well as steelmaking operations. The cause is often the focus of disputes between steel mills and uhp 450 mm graphite electrodes manufacturers.