Smelting furnace

Abstract

The invention discloses a smelting furnace. The smelting furnace comprises a furnace body and three combustors. The cross section of the inner circumference of the furnace body is circular. The three combustors are arranged at intervals in the circumferential direction of the furnace body, and the center axes of the three combustors on the furnace body are located in the same plane. Each combustor is provided with an air inlet, at least one fuel gas inlet and a smoke exhaust opening. The three combustors are configured in the manner that when air enters any combustor from the corresponding air inlet and fuel gas enters the combustor from the corresponding fuel gas inlet for combustion, the rest two of the three combustors exhaust smoke through the corresponding smoke outlet openings. According to the smelting furnace, the three combustors which are arranged at intervals in the circumferential direction of the furnace body are arranged, when one combustor conducts combustion, the rest two of the combustors exhaust smoke, and therefore fluctuation of pressure in the furnace can be reduced, evenness of the atmosphere and the temperature in the furnace is improved, and the thermal efficiency of the smelting furnace is improved.

Description

technical field [0001] The invention relates to the technical field of combustion, in particular to a melting furnace. Background technique [0002] In the related technology, during the smelting process, the aluminum melting furnace burns to produce high-temperature flue gas up to about 1000°C. These high-temperature flue gases contain fluoride and various salts generated when refining aluminum melts, and are also mixed with a large amount of raw materials. Dust makes the flue gas extremely corrosive, and the thermal efficiency of most aluminum melting furnaces is only about 30%. The low thermal efficiency also provides great possibilities for the transformation of the combustion method of aluminum melting furnaces. [0003] The application of regenerative combustion in aluminum melting furnace can increase the thermal efficiency of aluminum melting furnace by more than 50%. Not only that, due to the periodic reversing of regenerative combustion technology and the regular r...

AI Technical Summary

Problems solved by technology

However, this kind of regenerative aluminum melting furnace has the following disadvantages: 1) the pressure in the aluminum melting furnace equipped with this kind of burner fluctuates greatly during the reversing; 2) the atmosphere and temperature in the furnace are uneven and fluctuate greatly; 3) The amount of flue gas in the aluminum melting furnace is large, and an auxiliary flue is needed for exhausting; 4) A large amount of flue gas is discharged through the auxiliary flue, which cannot recover the heat of all the flue gas, and the heat recovery efficiency is not high

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