Working layer refractory brick piling structure restraining splashing and nodulation of RH vacuum tank

Abstract

The invention belongs to the technical field of ferrous metallurgy refining and particularly relates to a working layer refractory brick piling structure restraining splashing and nodulation of an RHvacuum tank. Through the working layer refractory brick piling structure, splashing and nodulation of the RH vacuum tank are lowered. The working layer refractory brick piling structure comprises a convex part and a vertical part. The vertical part extends to the two ends from the convex part. The convex part and the vertical part are obtained by piling refractory bricks. Compared with an existingpiling structure, the working layer refractory brick piling structure can achieve the effect that nodulation is not liable to occur to the RH vacuum tank. The piling mode is changed, gaps produced inthe piling process are used for installing thermal insulation materials, and heat transferred to a flange outside the furnace wall from the RH inner wall can be reduced. In addition, thermocouples are installed in the thermal insulation materials and are used for detecting the temperature of the RH furnace wall, if the temperature is lower than the temperature of easy-cold steel, furnace wall baking can be selected so as to reduce cold steel, and the purpose of temperature control of the RH tank is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical refining of iron and steel, and in particular relates to a stacking structure of refractory bricks in a working layer for suppressing splashing and nodulation of an RH vacuum tank body. Background technique [0002] RH external refining plays an important role in connecting the past and the future and adjusting the production rhythm in the whole steelmaking system. The connection between the upper tank and the lower tank of the RH needs to be connected by flanges. Since the flanges are steel products, long-term exposure to high temperatures will cause deformation of the flanges, making the sealing of the vacuum tank not strong. It is necessary to add a water cooling device around it. To avoid the deformation of the flange, but in actual production, the temperature of the joint position is low due to water cooling, and the splashed molten steel adheres to the upper and lower positions of the ...

AI Technical Summary

Problems solved by technology

The connection between the upper tank and the lower tank of the RH needs to be connected by flanges. Since the flanges are steel products, long-term exposure to high temperatures will cause deformation of the flanges, making the sealing of the vacuum tank not strong. It is necessary to add a water cooling device around it. To avoid the deformation of the flange, but in actual production, the temperature of the joint position is low due to water cooling, and the splashed molten steel adheres to the upper and lower positions of the joint due to chilling. With the increase of the service life of RH, the joint position The cold steel becomes thicker and thicker, and there is a risk of falling off at any time. In actual on-site production, the cold steel at the joints has fallen off as a whole, resulting in abnormal composition of the molten steel, so that returning to the LF furnace to readjust the composition of the molten steel will seriously affect the refining process. Production rhythm matching in the steel process, RH efficient production

The content of carbon, oxygen and hydrogen in cold steel nodules is high and unstable, and the shedding and reaction of nodules can easily cause abnormal composition of molten steel, affecting the cleanliness of molten steel, and the temperature of cold steel nodules is low, falling Into the steel may make the molten steel temperature abnormal, affecting the actual production

Images