Furnace cover device used for semi-closed submerged arc furnace

Abstract

The invention discloses a furnace cover device used for a semi-closed submerged arc furnace, which comprises a furnace cover, a large-scale water-cooling ring beam, a furnace cover feed opening, three electrode center circle diameter adjustable mechanisms, an electrode water cooled seal device, a furnace cover water-cooling door, a furnace cover pushing door, a furnace cover hanging device and a furnace cover fume collect opening; and the furnace cover is constituted by 18 water cooled cover flaps and the whole furnace cover is fixed on the hanging devices of 10 furnace covers by flanges and bolts. The three electrode center circle diameter mechanisms are arranged and respectively installed on three water cooled cover flaps over against an electrode. As for the furnace cover device provided by the invention, a large-scale water-cooling ring beam structure and the design that the whole furnace cover is zoned reasonably according to different function regions are adopted, and a design mode of 10 hangers according to the computed stress condition is adopted, the deformation problem of the large diameter furnace cover is solved, and the diameter of the large diameter furnace cover canreach 15-18 meters. The furnace cover device used for a semi-closed submerged arc furnace provided by the invention is provided with electrode center circle diameter adjustable mechanisms, thereby realizing that the diameter range of the electrode center circle can be adjusted according to working condition requirements.

Description

technical field [0001] The invention relates to a semi-closed furnace cover for a submerged arc furnace in the ferroalloy industry or other smelting industries, in particular to a semi-closed submerged arc furnace cover device. Background technique [0002] Submerged thermal electric furnaces are widely used in the smelting industry. They can smelt calcium carbide, ferroalloy products, and non-ferrous metals. From the furnace type, they are divided into semi-closed furnaces and closed furnaces. From the perspective of smelting technology, the market requires a large number of large furnaces with a diameter of 15 to 18 meters. cover. The furnace cover of existing semi-hermetic furnace has the following problems: [0003] 1. At present, the maximum diameter of the smelting furnace cover of the semi-closed submerged arc furnace is about 8.8 meters, which is small in diameter. Its structural form makes it difficult to increase the diameter. [0004] 2. The position of the elec...

AI Technical Summary

Problems solved by technology

[0003] 1. At present, the maximum diameter of the smelting furnace cover of the semi-closed submerged arc furnace is about 8.8 meters.

[0004] 2. The position of the electrode column of the furnace cover of the traditional electric furnace cannot be changed. The diameter of the pole center circle is a fixed value, and the diameter of the pole center circle is an important factor affecting the production capacity of the electric furnace, which cannot meet the production of different working conditions. If necessary, if you want to adjust the diameter of the polar circle, you can only remake the furnace cover through the second technical transformation in the workshop, which is time-consuming, costly and labor-intensive

[0005] 3. The side wall of the traditional furnace cover is a water-cooled structure, which requires a large amount of water supply and consumes a lot of power; there are many water-cooling points and production and maintenance points; in addition, the production cost of the furnace cover itself is also high

For small-scale manufacturers, the price / performance ratio is not high enough, no matter in terms of saving funds in the early stage or using it in the later stage

[0006] Chinese patent ZL 200820221711.1 discloses a detachable tubular water-cooled furnace cover for submerged arc furnaces, which is characterized in that seamless steel pipes are used as the water passage cavity, and the water-cooled cover plate of the furnace cover is surrounded by steel pipes. The disadvantage is that the water-cooled steel pipes The surrounding method makes the steel plate between the cooling water channels two-layer pipe wall thickness. After the diameter of the furnace cover is greatly enlarged, the steel structure weight of the overall furnace cover is also increased a lot. First, the equipment cost has increased significantly; second, the civil engineering hanging layer The bearing force of the floor has also increased significantly, and the cost of civil construction has increased; third, the special form of the bent joints of the steel pipes and the requirements for the bending radius of the steel pipes need to be customized by manufacturers specializing in the production of water-cooled pipe fittings, the manufacturing process is complicated, and the cost of raw materials and production costs are high; The diameter of the pole center circle cannot be adjusted; the fifth is that the side wall of the furnace cover is also a water-cooled cavity, and the water-cooled power consumption of the entire furnace cover is large

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