Production process of low power graphite electrode

The design and production of low-power graphite electrodes mainly focus on optimizing their conductivity, heat resistance, mechanical strength, and reducing energy consumption to meet the demand for low energy consumption and high efficiency in specific industrial applications such as electric arc furnace steelmaking and resistance furnace heating.

1. Raw material selection and proportioning

Selecting high-purity and well crystallized graphite ore as raw material is the basis for ensuring the performance of low-power graphite electrodes. High purity graphite can reduce the influence of impurities on conductivity and heat resistance. By adding appropriate binders (such as coal tar pitch), antioxidants (such as boric acid, calcium silicate, etc.), and reinforcing agents (such as carbon fiber, graphite fiber), the density, strength, and antioxidant performance of graphite electrodes can be improved. The types and proportions of additives need to be finely adjusted according to specific needs.

2. Molding process

By using isostatic pressing technology, the internal structure of the electrode is ensured to be uniform and dense, reducing pores and cracks, thereby improving the mechanical strength and conductivity of low-power graphite electrodes. For certain specific shapes or sizes of electrodes, compression molding can be used, but strict control of mold design and compression parameters is required to ensure molding quality.

3. Baking and Graphitization

Bake the formed electrode at an appropriate temperature to remove volatile components from the binder and initially form a graphitized structure. At this stage, it is necessary to control the heating rate and insulation time to avoid cracking or deformation of low-power graphite electrodes. Graphitization treatment is performed on the calcined electrode at high temperatures (usually exceeding 2000 ° C) to rearrange carbon atoms and form a more ordered graphite structure, further improving the conductivity and heat resistance of the electrode. Strict control of temperature, atmosphere, and time is required during the graphitization process to achieve the desired degree of graphitization.

4. Processing and surface treatment

Cut and grind low-power graphite electrodes according to usage requirements to ensure their dimensional accuracy and surface smoothness. To improve the oxidation resistance and wear resistance of the electrode, a protective coating such as anti-oxidation coating or wear-resistant coating can be applied on its surface.

5. Performance testing and optimization

Evaluate the conductivity of electrodes through resistivity testing. Including tests for flexural strength, compressive strength, etc., to ensure that the electrode is not easily broken during use. Test the oxidation resistance and thermal stability of electrodes in high temperature environments. Monitor and evaluate the energy consumption of low-power graphite electrodes in practical applications, and continuously optimize electrode design and production processes based on feedback results.

In summary, the design and production of low-power graphite electrodes is a complex process involving multiple steps such as raw material selection, forming process, calcination and graphitization, processing and surface treatment, as well as performance testing and optimization. By continuously optimizing these processes, graphite electrodes with excellent performance and low energy consumption can be produced to meet market demand.