Opening structure of a scrap steel preheating type electric arc furnace

Abstract

The invention discloses a cover opening structure of a waste steel preheating arc furnace, and belongs to the technical field of steel refining. The cover opening structure comprises a furnace body, a furnace cover, a waste steel preheating device and a ring body; the ring body is arranged above the furnace body, and is fixedly connected with the furnace body to form a waste steel charging joint; the waste steel charging joint is connected with the waste steel preheating device; the waste steel charging joint has a vertical plane perpendicular to the tilting axis of the furnace body for adapting to any tilting operation of the furnace body; a sealing surface matched with the furnace cover is arranged on one side, deviated from the waste steel preheating device, of the ring body for adapting to the rotary swing operation of the furnace cover; and when the furnace cover is closed, the furnace cover and the ring body form tight combination through the sealing surface. The cover opening structure can keep closed arc surface when the sealing surface closes the furnace cover, is convenient to open and close the furnace cover, is tight in matching between the furnace cover and the furnace body, and is excellent in tightness of the whole arc furnace.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a cover opening structure for a steel scrap preheating type electric arc furnace. Background technique [0002] In the field of electric arc furnace steelmaking, energy saving and environmental protection are one of the biggest driving forces to promote technological progress, such as patent CN105202907A, which achieves the purpose of energy saving by using high-temperature flue gas to preheat scrap steel. In the above technical solution, when the furnace cover is to be opened, the scrap steel preheating device needs to be moved a certain distance away from the electric arc furnace, so as to allow the space for the furnace cover to rotate and swing. The equipment structure of this design method is complex, the operation is cumbersome, and the cantilever of the furnace cover is long, which increases the load of the lifting mechanism, so this technology is not suita...

AI Technical Summary

Problems solved by technology

This design method has complex equipment structure, cumbersome operation, and the furnace cover cantilever is long, which increases the load of the lifting mechanism, so this technology is not suitable for unscrewing the furnace cover to feed materials.

However, in actual production, some scrap steel, such as heavy scrap steel, cannot be fed into the furnace through the scrap steel preheating device, and needs to be directly added into the furnace by opening the furnace cover.

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