Gas isolation method used during drying of hot-blast stove in iron works

Abstract

The present invention relates to a gas isolation method used during the drying of a hot-blast stove in an iron works, and belongs to the construction method of a hot-blast stove. The method is characterized in that a left and a right high-alumina brick partition walls are arranged near a wind-mixing pipe by corresponding to the left part of a manhole in the inner cavity of a hot-blast main; high-alumina bricks are pre-placed before the left and the right partition walls are made; lines are drawn on arc bricks, and then the arc bricks are finish-machined and numbered; a stove builder makes thewalls layer by layer from the bottom and fills the joints layer by layer, near a right hot-blast branch pipe in the hot-blast main; when the left and the right partitions are made 700mm from the top,the stove builder moves across the left and the right partitions to one side of the wind-mixing pipe to finish making the rest of the walls; the mortar plumpness is up to 95%; the size of mortar joints is 2 mm plus or minus 1mm; the thicknesses of the left and the right partition walls range from 230 to 250mm on average; refractory layers are applied to the outer surfaces of the left and the right partition walls; and the thickness of the refractory layers can range from 2 to 3mm. The method can effectively isolate gas. The hot-blast pipe and a blast furnace are made simultaneously, which guarantees the schedule.

Description

technical field [0001] The invention belongs to a construction method of a hot blast stove, in particular to a gas isolation method of a hot blast stove. Background technique [0002] At present, during the construction of the ironworks, the hot blast stove is baked simultaneously with the hot blast pipeline and the blast furnace masonry. The method of isolating the gas to prevent leakage is to realize the gas isolation by setting a steel blind plate at the flange of the hot blast valve. The steel blind plate , Aluminum gaskets and connecting bolts are combined to form a gas isolation device for the oven. After the gas alarm test confirms that there is no gas leakage, the gas isolation device is effective. The disadvantages of this device are: when removing the steel blind plate, it is necessary to It will cause great damage to the refractory fiber blanket in the expansion joint at the hot blast valve, and it will take a long time to install and dismantle it. After the blast...

AI Technical Summary

Problems solved by technology

[0002] At present, during the construction of the ironworks, the hot blast stove is baked simultaneously with the hot blast pipeline and the blast furnace masonry. The method of isolating the gas to prevent leakage is to realize the gas isolation by setting a steel blind plate at the flange of the hot blast valve. The steel blind plate , Aluminum gaskets and connecting bolts are combined to form a gas isolation device for the oven. After the gas alarm test confirms that there is no gas leakage, the gas isolation device is effective. The disadvantages of this device are: when removing the steel blind plate, it is necessary to It will cause great damage to the refractory fiber blanket in the expansion joint at the hot blast valve, and it will take a long time to install and dismantle it. After the blast furnace is put into operation, the hot blast branch pipe shell at the hot blast valve will easily turn red, and even cause the hot blast branch pipe to burst, affecting normal operation production and safety hazards

Images