Electrode paste is a carbon-based material that is used to produce continuous self-baking electrodes for the industrial production a number important metals. This product, known as Soderberg electrode paste, is comprised of a carefully formulated blend of calcined petroleum coke (CPC) or electrically calcined anthracite coal, coal tar pitch and other additives, all of which are used to generate the conductivity required for electric arc furnaces.
Production of electrode paste carbon is an important step in manufacturing for many industries that depend on this type of product. It is crucial that the end product meets high standards of quality in order to maximize both the performance and the longevity of the produced electrodes. In order to do so, the various ingredients must be blended and mixed to achieve a uniform mixture that will result in electrodes with optimal conductivity and mechanical strength.
The temperature and the time at which the paste is kneaded are the two most important variables in the process. This is because the kneading stage determines how the final product will turn out in terms of its physical and chemical properties. The kneading temperatures influence the viscosity, flowability, and mechanical strength of the electrodes.
Orient Carbon Industry manufactures waterproof graphite impregnated with phenolic to create a durable and long-lasting product. The waterproof graphite material is produced in a two-step process. First, synthetic carbon is made using petroleum coke. This material is then molded and sinterized into electrode paste. The sintering of waterproof graphite makes it extremely resistant to thermal stress and corrosion and oxidation.
The final electrode carbon is then fed in the smelting columns of an electric arc kiln as cylinders, eggs or briquettes. These electrodes then conduct electric currents in an arc into the molten steel in the smelting crucible to conduct a continuously electric smelting. The smelting processes can produce pig iron (such as ferrochrome), ferroalloys and silicon carbide. The smelting process requires a large amount of electricity. The electrodes must also be able endure high temperatures. The electrodes should also have excellent mechanical properties and be resistant to corrosion and oxide. Due to its durability and high quality, the Soderberg electrode paste carbon paste is ideal for these applications. This is because the carbon in electrodes is bonded onto the substrate using coal tar, which provides the tensile and tear strength required for these types of applications. In order to meet these requirements, the kneading procedure in conjunction with sintering in the melting furnace is crucial.
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