Novel burning and circulating system for aluminum smelting furnace

Abstract

The invention discloses a novel burning and circulating system for an aluminum smelting furnace. The novel burning and circulating system comprises a mother furnace body, a melting chamber, a feeding chamber, a heat storage system and an aluminum water circulating pump. The mother furnace body is internally provided with the melting chamber and the feeding chamber, the melting chamber and the feeding chamber are separated, the bottom of the melting chamber communicates with the bottom of the feeding chamber, and the upper portions of the melting chamber and the feeding chamber are partitioned by liquid. The heat storage system comprises three heat storage chambers arranged on the mother furnace body and corresponding heat storage burning torches and burners. The novel burning and circulating system further comprises a combustion air pipeline, a combustion fan, a flue gas emission pipeline, an exhaust gas fan and a PLC system. The combustion air pipeline and the flue gas emission pipeline are each internally provided with a plurality of two-way valves which are connected in parallel. The combustion fan communicates with the corresponding heat storage type burning torches and burners through the combustion air pipeline, and the exhaust gas fan communicates with the corresponding heat storage type burning torches and burners through the smoke emission pipeline. By means of the novel burning and circulating system, the burning efficiency is greatly improved, the heat is recycled completely, the gas consumption per unit is reduced, the number of times of ash beating is increased, the melting efficiency is improved, and the burning loss is reduced.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of aluminum smelting, in particular to a novel combustion and circulation system of an aluminum smelting furnace. [0003] 【Background technique】 [0004] For a long time, the aluminum industry has been a high energy-consuming industry, which has caused environmental pollution while increasing the cost burden. The previous melting method of aluminum was direct combustion with high-temperature oxygen-enriched flame, and the aluminum raw material was burned too much. The melting efficiency needs to be further improved. [0005] Before the transformation, the original combustion-supporting fan sends the combustion-supporting air to the burner, mixes it with fuel, and sprays it into the furnace for combustion. The aluminum ingots and aluminum waste in the furnace are heated to 660°C and melted, and the molten aluminum is heated to 750°C, and then put into ingots The machine is poured and cooled into a ...

AI Technical Summary

Problems solved by technology

The previous melting method of aluminum was direct combustion with high-temperature oxygen-enriched flame, and the aluminum raw material was burned too much. Melting efficiency needs to be further improved

[0005] Before the transformation, the original combustion-supporting fan sends the combustion-supporting air to the burner, mixes it with fuel, and sprays it into the furnace for combustion. The aluminum ingots and aluminum waste in the furnace are heated to 660°C and melted, and the molten aluminum is heated to 750°C, and then put into ingots The machine is poured and cooled into a round rod, and the high-temperature flue gas of the fuel combustion product still has a lot of heat energy, the temperature is above 950 ° C, and it is directly discharged from the workshop through the smoke exhaust port of the furnace door, resulting in low thermal efficiency of the fuel, and the thermal efficiency is only 25%.

[0006] The original smelting and casting furnace is a flue gas direct exhaust type aluminum smelting furnace. When this old-fashioned aluminum smelting and casting furnace is burned, the exhaust gas is directly discharged from the smoke exhaust hole of the furnace door and the smoke exhaust port of the flue. The unit consumption of natural gas per ton of aluminum melting is about 92 cubic meters, which is neither economical nor environmentally friendly

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