Ladle covering and uncovering device of LF and using method thereof

Abstract

The invention discloses a ladle covering and uncovering device of an LF and a using method thereof. The ladle covering and uncovering device comprises a fixed beam supporting mechanism, a movable beamtelescopic mechanism and a driving mechanism, wherein the movable beam telescopic mechanism reciprocates on the fixed beam supporting mechanism, a fixed beam rack is arranged on the fixed beam supporting mechanism, a movable beam rack is arranged on the movable beam telescopic mechanism, and the driving mechanism is arranged between the movable beam telescopic mechanism and the fixed beam supporting mechanism. A synchronous gear set in the driving mechanism simultaneously meshes with the fixed beam rack and the movable beam rack. The problem that due to the fact that the installation space ofthe station of the LF is limited, a rail of a ladle car of the LF is arranged perpendicular to a rail of a converter, and the situation that the covering and uncovering device cannot be arranged on line is solved; heat exchange between molten steel and air is effectively blocked by covering the steel ladle, heat radiation loss of the steel ladle is reduced, tapping temperature of the converter isreduced, inclusions in molten steel are reduced, casting blank quality is improved, and the service life of a steel ladle refractory is prolonged.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to an LF furnace ladle capping device and a use method thereof, which are mainly used in capping a ladle in metal smelting. Background technique [0002] In recent years, how to improve the level of smelting, reduce energy consumption, and reduce production costs has become an important research topic for iron and steel enterprises. In the steelmaking process, the molten steel temperature is an important technical index and process parameter in the steelmaking and continuous casting process, which has an important impact on the production level of steelmaking and the quality of the slab. Studies have shown that there are two main ways for molten steel heat loss: one is heat conduction between molten steel and refractory materials; the other is heat radiation from molten steel to the air due to the opening at the top of the ladle. Under normal conditions, the temperature of t...

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Problems solved by technology

The tapping temperature of molten steel in the converter is closely related to the quality of the slab. The higher the tapping temperature, the higher the oxygen content in the steel, which leads to a decrease in the yield of the alloy during the deoxidation alloying process of the tapping, and also leads to On the other hand, taking a 150-ton ladle as an example, the thermal radiation of the ladle lining to the air is the most serious 5 minutes before the empty ladle is filled with molten steel after baking, accounting for about 40% of the heat radiation loss. Heat loss will result in a temperature loss of 10-15°C for the next batch of molten steel

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