Ladle lidding device

Abstract

The invention provides a ladle lidding device, and belongs to heat preservation technologies of a ladle. The ladle lidding device comprises an inner hood, an outer hood and a suspending hook; the internal shape of the inner hood coincides with the shape of a ladle opening, and the inner hood is used for covering the ladle opening; the internal shape of the outer hood coincides with the external shape of the inner hood, the edge of the outer hood is connected with that of the inner hood, and a sealed sandwich layer space is formed between the inner hood and the outer hood; the suspending hook is arranged on the outer hood and is used for suspending the ladle lidding device. The ladle lidding device has the advantages that through the principle that the air heat conducting coefficient is small, the ladle lidding device is manufactured, loss of molten iron heat energy is effectively lowered, the steel output temperature is increased, and the steel quality is improved; a desulfurization reaction is easily conducted, the consumption of active lime is reduced, and the cost is lowered; cracking caused by the stress of a refractory material is reduced, the service life of the refractory material is prolonged, and the service life of the ladle is prolonged.

Description

technical field [0001] The invention provides a ladle capping device, which belongs to the heat preservation technology of the ladle, which can prevent the molten iron from cooling down too quickly during the storage and transportation process, and is also suitable for the storage and transportation heat preservation of other high-temperature liquid metals. Background technique [0002] When the molten iron flows out of the blast furnace, the temperature is generally 1480°C to 1510°C. However, when the molten iron reaches steelmaking, the temperature is 1360°C to 1400°C, and the temperature drops by about 100°C. Raising the temperature of molten iron is very important for steelmaking: first, it can increase the tapping temperature; second, it can increase the proportion of scrap steel in the steelmaking ingredients; third, it is beneficial to desulfurization in the steelmaking process. Therefore, when the molten iron ladle is filled with molten iron, a molten iron capping de...

AI Technical Summary

Problems solved by technology

The lid needs to be lifted when receiving molten iron and mixing molten iron. Although it increases some operational burdens, this disadvantage is negligible compared to the advantages.

[0005] At present, most domestic ladles do not have a capping device. Although a few have a capping device, they are usually single-layer steel plates, which are opened and closed by hydraulic machinery. However, due to the single-layer steel plate, the heat dissipation is still relatively large, resulting in a relatively low temperature drop of molten iron. Big, especially serious is the rainy day, the downpour pours directly into the molten iron ladle, which not only causes the heat loss of the molten iron, but also breaks the rhythm of steelmaking in severe cases

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