Slab heating furnace without water-cooled furnace door

Abstract

The invention belongs to the field of thick slab rolling and hot working, and particularly relates to a non-water-cooling furnace door of a slab heating furnace. The furnace door comprises side plates, and further comprises a plurality of sets of transverse rib plates and a plurality of sets of longitudinal rib plates, wherein the transverse rib plates and the longitudinal rib plates are located between the side plates. Each transverse rib plate comprises an inner transverse rib plate body and an outer transverse rib plate body, wherein the inner transverse rib plate body is perpendicular to the side plates and inclines upwards, an angle of inclination is formed between the inner transverse rib plate body and the horizontal plane, the lower end of the inner transverse rib plate body is connected with one side of a front face plate, the other side of the front face plate is fixedly connected with the outer transverse rib plate body, the outer transverse rib plate body is respectively perpendicular to the front face plate and the side plates, and the inner transverse rib plate body is provided with a plurality of inner transverse rib plate body holes. The longitudinal rib plates are provided with a plurality of longitudinal rib plate holes. According to the non-water-cooling furnace door, thermal insulation materials cannot fall off when the furnace door is frequently opened and closed at the high temperature, the high-temperature resisting performance is good, the service life is long, the production and operation cost is low, the furnace door does not need water cooling through the transverse rib plates, the longitudinal rib plates and the rib plate body holes, and the overall deformation is very small when the furnace door is used at the high temperature for a long time.

Description

Technical field [0001] The invention belongs to the field of thick slab rolling and thermal processing, and in particular relates to a water-free cooling furnace door of a slab heating furnace. Background technique [0002] The working state of the steel rolling heating furnace is high-temperature flame combustion, and the furnace is under positive pressure. The gas escape and radiant heat loss at the discharge port of the heating furnace are quite large. The main function of the furnace door is to seal the discharge port and reduce heat loss. , To reduce the temperature fluctuation of the furnace, the furnace door with good performance is very important to reduce the heat loss of the furnace and improve the heating quality. [0003] The working environment of the furnace door is very harsh. The inner wall bears a high temperature of more than 1200 degrees Celsius. The outer wall is at room temperature and has a large temperature difference. It opens when discharging and closes aft...

AI Technical Summary

Problems solved by technology

[0003] The working environment of the furnace door is very harsh. The inner wall bears a high temperature of more than 1200 degrees Celsius, and the outer wall is at room temperature. The temperature difference is large. Plate frame deformation, etc., making the furnace door sealing and prolonging the working life a very difficult problem

[0004] In the prior art, the water-cooled furnace door is used. The characteristic of the water-cooled furnace door is that the sealing surface of the furnace door and the internal load-bearing frame structure are cooled by water. Forced cooling with water can make the sealing surface and the furnace door as a whole difficult to deform. The disadvantages are: ① The heat taken away by the cooling water is large, and the heat loss is large, which will easily cause the furnace temperature to fluctuate or even drop, and affect the uniformity of the temperature of the steel billet to be discharged; ②When the production water is stopped suddenly, the furnace door will be burned due to lack of water

The water-cooled furnace door cannot be short of water. However, power outages occur during equipment maintenance. This situation is very frequent after 2005. The furnace door is often burned due to power outages and water shortages.

After the furnace door is burnt out, it cannot be replaced because it is in a high-temperature zone. The water leakage of the burnt out furnace door will often cause the slide block of the heating furnace slideway to crack and fall off, which will affect production.

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