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Combined arc furnace cover

An electric arc furnace and combined technology, which is applied in the field of combined electric arc furnace cover, can solve problems such as brick loosening, falling off, poor integrity of the furnace cover, and failure to work normally, and achieves fast building speed, reduced on-site workload, and build simple effects

Inactive Publication Date: 2011-10-12
张小旭
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The easily damaged part of the furnace cover is the electrode hole area, which is mainly affected by the high temperature melting loss of the electrode, the erosion and erosion of the flue gas in the furnace, and the erosion of the slag. When used to a certain extent, the bricks around the electrode hole will gradually loosen , falls off, and then the entire furnace cover is scrapped, and all furnace cover bricks are also discarded
Because the integrity of the furnace cover made of bricks is poor, once a local failure occurs, there will be abnormalities around it, and it will not work normally, so the entire furnace cover will be used to the end

Method used

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  • Combined arc furnace cover
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  • Combined arc furnace cover

Examples

Experimental program
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Effect test

Embodiment Construction

[0027] Take the thickness of the original furnace cover as 230mm as an example to illustrate:

[0028] 1, press image 3 and Figure 4 As shown, carry out drawing conversion: K=150mm, α=75°, H=300mm, Q=50mm, arch height 1 takes 35mm, arch height 2 takes 25mm.

[0029] 2, press Figure 5 , Figure 6 , Figure 7 , Figure 8 Make the prefabricated parts of the furnace top small furnace cover ② and the surrounding furnace cover ③ respectively, and the selection of prefabricated materials is as follows:

[0030] Castable for furnace top small furnace cover ②

[0031]

[0032] Castables for surrounding furnace cover ③

[0033]

[0034]

[0035] The manufacturing process and process of the prefabricated part of the furnace cover are the same as those of the general prefabricated part, and the small furnace cover on the furnace top needs to pre-embed the hook ④.

[0036] 3. Press the prefabricated parts of the surrounding furnace cover ③ Figure 9 Assemble on the fur...

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Abstract

The invention discloses a combined arc furnace cover, which is assembled by two parts, namely a small furnace cover and a peripheral prefabricated part. Therefore, the small furnace cover on the top of the furnace, which is rapidly damaged, is convenient to replace directly on line. The traditional furnace cover is built by combining phosphate and high-alumina bricks. Compared with the traditional furnace cover, the arc furnace cover has the advantages of long comprehensive service life, convenience in building, simple replacement, simple production process and low production energy consumption.

Description

technical field [0001] The invention relates to the improvement of the cover of an electric arc furnace for short-flow steelmaking equipment. The cover is assembled from refractory prefabricated parts and has the advantages of high comprehensive life, convenient masonry, easy replacement, simple production process and low production energy consumption. Background technique [0002] At present, the electric arc furnace cover for steelmaking adopts two structures: first, the water-cooled ring structure, which uses steel fiber reinforced corundum-mullite or other types of refractory prefabricated parts in the triangular area of ​​the furnace roof; second, the whole furnace The cover is made of phosphate-bonded high-alumina brick masonry and has a spherical shape. Large-scale electric furnaces or ultra-high-power electric furnaces generally adopt the first type of structure. However, furnace covers made of phosphate combined with high-alumina bricks are also common in China. Thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B3/16
Inventor 张小旭
Owner 张小旭
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