Electrode shell of large submerged arc furnace

Abstract

The invention relates to an electrode shell of a large submerged arc furnace. The electrode shell comprises cylindrical sections which are sequentially connected, wherein each cylindrical section comprises a cylindrical shell; a plurality of fins which are arranged at equal intervals are arranged in the longitudinal direction of the inner side of the shell, each fin is formed by superposing and fixing two steel plates, a plurality of circular holes the diameters of which are 20mm are arranged between the two steel plates, a branch is arranged at the upper end of each of the two steel plates, and the branch is connected with the lower end of the fin of the cylindrical section at the upper end of the cylindrical section on which the branch is positioned; and fixing rings are respectively fixed inside the upper end and lower end of the shell, and a connecting ring is fixed outside the fixing ring between two adjacent cylindrical sections. In the electrode shell of the large submerged arc furnace provided by the invention, because the upper electrode fins and the lower electrode fins can be connected mutually, the splicing verticality is good. In the electrode shell of the large submerged arc furnace provided by the invention, the internal connection strength, the contact area and the conductive effect which are between the electrode shell and an electrode paste are increased through the plurality of circular holes between the two steel plates of each fin, thus the quantity and width of the fins can be reduced, the consumption of ferrous materials can be reduced, and the pollution on products caused by impurities is lowered in the using process.

Description

technical field [0001] The invention relates to an electrode shell, in particular to a large-scale submerged arc furnace electrode shell. Background technique [0002] Electrodes are materials used as conductors in electric furnace smelting. They usually work under low voltage and high current conditions, so they must have good conductivity. The material used as an electrode must have a high melting point, otherwise it will melt quickly, affecting the smooth progress of normal production. Carbonaceous materials are the most ideal electrode materials. There are three types of electrodes used in electric furnaces, namely carbon electrodes, graphite electrodes and self-baking electrodes. The carbon electrode is made of low ash anthracite, metallurgical coke and other carbon materials according to a certain proportion and particle size at a certain temperature, adding binder and pitch, uniformly stirring, pressing and molding, and then roasting at 1300 ° C; graphite electrode ...

AI Technical Summary

Problems solved by technology

The main disadvantages of the electrode shell of this structure are: ①There are many ribs, and the upper and lower electrode ribs cannot be connected to each other, resulting in poor verticality of the connection, and a relatively high accident rate in operation; ②There are many ribs, and the electrode shell uses more iron materials, and the cost is relatively low. High; ③ There are many iron materials, and the electrode itself brings a lot of iron into the product, so it is not suitable for smelting products that strictly control the content of iron impurities

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