Spray lance for side-blown submerged combustion bath metallurgical furnace and metallurgical furnace having it

Abstract

The invention discloses a spray gun used for side blowing of an immersion combustion molten pool metallurgical furnace and a metallurgical furnace with the spray gun. The spray gun comprises an outer spray pipe, an inserting and connecting automatically-locking part, an inner spray pipe and a blocking part. The outer spray pipe is provided with an oxidant gas inlet, an oxidant gas outlet and an inserting opening. The inserting and connecting automatically-locking part has an automatic locking and closing function and is installed at the position of the inserting opening of the outer spray pipe. The inner spray pipe is provided with a medium inlet, a medium spray opening and a medium cleaning opening. The inner spray pipe is detachably inserted in and connected to the inserting and connecting automatically-locking part. The end, provided with the medium spray opening, of the inner spray pipe stretches into the outer spray pipe through the inserting opening, and when the inner spray pipe is disengaged from the inserting and connecting automatically-locking part, the inserting and connecting automatically-locking part is locked automatically and closed so as to block the inserting opening. The blocking part is installed on the inner spray pipe so as to open or close the medium cleaning opening. The spray gun can be used for conveniently removing coal dust blocked in the inner spray pipe so that the inner spray pipe can be dredged in time, the liquid level of a molten pool does not need to be lowered when the inner spray pipe is demounted and maintained, it is effectively ensured that the metallurgical furnace normally runs, and the productivity is increased.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a spray gun for a metallurgical furnace of a side-blown submerged combustion bath and a metallurgical furnace equipped with the same. Background technique [0002] In related technologies, the submerged side-blown molten pool smelting method is widely used in the fields of lead smelting, reduction of high-lead slag, secondary lead smelting, slag fuming and copper smelting. The submerged side-blowing molten pool smelting method is to inject air, oxygen-enriched air, and fuel into the molten pool through the tuyeres on both sides of the furnace body or spray guns, and the injected gas stirs the molten pool to accelerate heat transfer and chemical reactions in the molten pool. For molten pool smelting of heat-generating materials, only air or oxygen-enriched air needs to be fed in from the side tuyere; Oxygen, air and fuel are used for submerged combustion, and the heat released...

AI Technical Summary

Problems solved by technology

[0004] 1. When replacing the spray gun used for the side-blown submerged combustion bath metallurgical furnace, it is necessary to interrupt the operation and lower the liquid level in the molten pool below the spray gun. After the replacement is completed, the liquid level in the molten pool must be raised to the preset height, which reduces the production efficiency

[0005] 2. The fuels delivered by the existing high-pressure spray guns used for side-blown submerged combustion pool metallurgical furnaces are natural gas, producer gas, coke oven gas and other gases. When used to transport coal powder, the coal powder channel in the spray gun is prone to be In case of clogging, it is necessary to pull out the spray gun used for the side-blown submerged combustion bath metallurgical furnace to dredge the pulverized coal channel, which is inconvenient for maintenance

[0006] 3. At present, the pressure of the spray gun used for conveying pulverized coal in the side-blown submerged combustion pool metallurgical furnace is relatively low, resulting in poor cooling effect of the spray gun itself, which not only reduces the service life of the spray gun used in the side-blown submerged combustion pool metallurgical furnace , and the erosion of the side wall of the furnace body is more severe, which in turn causes the side wall of the furnace body to be severely burned

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