Masonry method of RH refining furnace capable of reducing consumption of refractory materials

Abstract

The invention relates to a masonry method of an RH refining furnace capable of reducing consumption of refractory materials, belonging to the technical field of metallurgy external refining refractory material masonry. The technical scheme comprises the following steps: carrying out fire-proof brick masonry by in a break joint mode in the masonry process of a vacuum groove; digging only a part ofcirculation tubular bricks and working lining magnesite chrome bricks right above without removing all the working lining magnesite chrome bricks right above the circulation tubular bricks in replacing a dip pipe, wherein the size of the dug part is just the size which ensures that the dip pipe can be taken out; and repairing and recovering the tubular bricks and the dug working lining magnesite chrome bricks right above after the dip pipe is replaced. The method provided by the invention has the beneficial effects that because a trigonum digging and repairing method is adopted, namely a break joint masonry mode is adopted by utilizing the upper layer bricks and the lower layer bricks, a digging and repairing mode similar to a pyramid type is adopted, thus the number of bricks dug in the upper layer working lining is reduced, the improper offline amount of magnesite chrome bricks is reduced effectively, the using amount of the magnesite chrome bricks is saved, the masonry cost is lowered, the labor intensity of workers is relieved, and the aims of rapid repairing and replacing the dip pipe are achieved.

Description

Technical field [0001] The invention relates to a RH refining furnace masonry method capable of reducing the consumption of refractory materials, and belongs to the technical field of refining refractory materials masonry outside the metallurgical furnace. Background technique [0002] In steelmaking production, the refractory material used in the vacuum tank for RH (vacuum degassing) is magnesia-chromium refractory. Because chrome ore is relatively rare, magnesia-chromium refractories are expensive. At the bottom of the vacuum tank, there is a pair of immersion pipes, namely the ascending pipe and the descending pipe. The service life is about 70 furnaces, so frequent replacement is required. The connection between the dip tube and the bottom of the tank requires high precision. The steel body is connected by welding, and the gap between the internal bricks is less than 0.5mm. The offline dip tube needs to be cut every time the dip tube is repaired. Remove the top two loops of ...

AI Technical Summary

Problems solved by technology

Therefore, the magnesia-chrome bricks of the working layer that should not have been replaced were offline ahead of time, and the normal life of the lining bricks in the lower tank was 2 to 3 times that of the dipping pipe, which caused additional loss, and caused time and labor for repairing masonry. increased labor intensity

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