Nodular cast iron type finery shielding cover

Abstract

The invention relates to a nodular cast iron type finery shielding cover which comprises a shielding cap body and a plurality of rib reinforcements, wherein the shielding cover body is made of heat resistant nodular cast iron materials, the center of which is protruded; and the horizontal section of the shielding cover body is a circular; the rib reinforcements are arranged on the shielding cover body and are distributed along the diameter direction of the shielding cover body; and the center of the shielding cover body is provided with more than one observation hole and at least one vent hole. By using the appropriate heat resistant nodular cast iron materials and reasonably-designed casting structure, the nodular cast iron type VD furnace shielding cover meets requirements of the VD furnace shielding cover for the work environment under the condition of not using refractory materials, thereby basically solving the problem that refractory materials fall into molten steel and becoming difficult to deform. The use of the nodular cast iron type VD furnace shielding cover lowers the labor intensity of workers, omits the procedures of masonry and maintenance of refractory materials and the like, and improves the production efficiency.

Description

technical field [0001] The invention belongs to a refining furnace shielding cover, in particular to a nodular cast iron type VD furnace shielding cover. Background technique [0002] The working conditions of the VD furnace shield cover in the refining furnace are harsh, and the heat radiation temperature can reach 1000°C. The traditional VD furnace shield cover adopts a steel structure, and the inner wall is built with refractory materials. A prominent problem in the use process is working at high temperature. Under the environment, the steel structure is easily deformed and the effect of high temperature radiation causes the refractory material to fall off and fall into the ladle, which will affect the quality of molten steel in the slightest, and lead to the scrapping of the entire ladle of molten steel in severe cases. [0003] According to the definition of nodular cast iron: carbon exists in the form of spherical graphite, and its mechanical properties are far better ...

AI Technical Summary

Problems solved by technology

[0002] The working conditions of the VD furnace shield cover in the refining furnace are harsh, and the heat radiation temperature can reach 1000°C. The traditional VD furnace shield cover adopts a steel structure, and the inner wall is built of refractory materials. A prominent problem in the use process is working at high temperature. Under the environment, the steel structure is easily deformed and the effect of high temperature radiation causes the refractory material to fall off and fall into the ladle, which will affect the quality of molten steel in the slightest and cause the entire ladle of molten steel to be scrapped

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