Scrap steel preheating system for electric arc furnace

Abstract

The invention relates to a scrap steel preheating system for an electric arc furnace, which realizes the preheating for steelmaking raw materials for the electric arc furnace by fully utilizing the physical and chemical waste heat of high-temperature flue gas of the electric arc furnace and enables a dust removal system to filter and cool the high-temperature flue gas to achieve the purposes of energy saving, reduction of consumption, emission reduction and environment protection as well as improve the steelmaking production ratio of the electric arc furnace and to realize the investment and alteration of preheating scrap steel by high-temperature flue gas in a current old factory workshop. The scrap steel preheating system for an electric arc furnace comprises scrap steel preheating basket mechanisms and a basket rotation swing mechanism; the basket rotation swing mechanism is respectively connected with the scrap steel preheating basket mechanisms positioned at a scrap steel receiving position and a scrap steel preheating position through swing supporting frames; and a high-temperature flue gag water-cooling flue and a scrap steel preheating cap are arranged between the basket rotation swing mechanism and the upper end of the scrap steel preheating basket mechanism at the scrap steel preheating position.

Description

1. Technical field: [0001] The invention relates to a metallurgical equipment, in particular to an electric arc furnace scrap steel preheating system, which is suitable for newly built electric arc furnaces with various capacities, and is also suitable for technical transformation of existing electric arc furnaces. 2. Background technology: [0002] In the background technology, at present, there are mainly the following methods for high-temperature flue gas emission or scrap steel preheating in steelmaking electric arc furnaces at home and abroad: [0003] 1) The fourth hole of electric arc furnace → Settling chamber + water-cooled flue → Dust collector + chimney 2) Electric arc furnace → Spoiler + roof cover → Dust collector + chimney 3) Electric arc furnace → movable hood (dog house) → Dust collector + chimney 4) Electric arc furnace → Consteel h...

AI Technical Summary

Problems solved by technology

[0004] Among them, in the first, second and third forms, the high-temperature flue gas of the electric arc furnace is directly discharged, and its physical and chemical heat is directly discharged into the atmosphere without being used

[0005] In the fourth form, the equipment investment and plant investment are very large, the equipment occupies a large area, the equipment maintenance workload is large, the heat exchange efficiency is low, the preheating effect is not ideal, and the equipment operation cost is also high.

[0006] In the fifth form, the equipment investment and plant investment are very large, the rail surface elevation of the main plant building is higher than normal, the equipment accident rate is high, the maintenance workload is large, and the heat exchange efficiency and scrap steel preheating effect are relatively good.

[0007] At present, various types of scrap steel preheating devices are common, or the investment in equipment and its workshop is relatively large, the effect of the preheating equipment is not ideal, and the operating cost is high; high

In short, none of these scrap steel preheating equipment can realize the investment transformation of high temperature flue gas preheating scrap steel in the existing old workshop

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