VD vacuum furnace shielding furnace lid

Abstract

The invention discloses a VD vacuum furnace shielding furnace lid. The furnace lid is provided with a furnace lid housing (1) made of steel and a shielding lid steel ring (5), and also comprises a refractory material shielding layer, wherein the inner surface of the furnace lid housing (1) is provided with material hanging nails (3); the furnace lid housing (1) is provided with an observation hole (4); and the observation hole (4) is positioned on the conical surface of the furnace lid housing (1). By adopting the above technical scheme, the structure of the VD shielding furnace lid is changed, so the vacuum furnace lid can be effectively protected, the points of the inner wall of the shielding furnace lid washed by molten steel can be reduced, and the steel heat frequency of the furnace lid is prolonged; and the a partial refractory material falling phenomenon caused by oversize force application is avoided. The furnace lid maintenance and replacement time is reduced, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industry production, and relates to steel vacuum refining process equipment, more specifically, the invention relates to a VD vacuum furnace shielded furnace cover. Background technique [0002] The VD vacuum furnace cover needs to rely on the shielded furnace cover to reduce the direct impact of molten steel on the vacuum furnace cover, thereby prolonging the service life of the vacuum furnace cover. [0003] The VD shielding furnace cover in the prior art has played a certain protective effect on the vacuum furnace cover, such as figure 1 As shown (that is, the VD shielded furnace cover provided by general manufacturers). After a period of production use, many disadvantages were found: [0004] 1. Every time the shielded furnace cover is replaced, it is necessary to make a steel plate shell first, and weld the hanging nails inside it, turn it upside down when knotting, then fill it with ...

AI Technical Summary

Problems solved by technology

[0004] 1. Every time the shielded furnace cover is replaced, it is necessary to make a steel plate shell first, and weld the hanging nails inside it, turn it upside down when knotting, then fill it with resistant materials, and carry out vibration compaction, dry naturally, and then bake. Long and unsatisfactory

[0005] 2. The steel plate shell of the shielded furnace cover is easy to deform, the welding joint is easy to desolder, and the nails and knotting materials in the furnace cover are easy to fall off, and the finished product is not firm

[0006] 3. After the shielded furnace cover is baked by high-temperature molten steel, the knotting material falls off quickly, causing the shielded steel shell to be easily deformed, affecting production and reducing the use time of the vacuum furnace cover

[0007] 4. The replacement cycle is long, the steel shell must be baked with the knotting material at the same time, and it must be made before replacement, which seriously affects normal use

[0008] 5. Due to the falling off of the knotting material and the deformation and damage of the steel shell, the use of the shielded furnace cover is short, which increases the cost and affects the production rhythm

Images