Direct reduction process for producing sponge iron by using CH4 non-catalytic oxygen-enriched transformation
A non-catalytic, sponge iron technology, applied in the field of iron or steel smelting, can solve the problems of long process flow, easy bonding of sponge iron, short service life of burners, etc., achieving strong controllability of process parameters, obvious investment and emissions , the effect of prolonging the service life
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[0046] Example 1:
[0047] Sponge iron made from titanium vanadium magnetite
[0048] Coke oven gas is purified and pressurized as rich CH 4 The raw material gas and oxygen-enriched air are respectively preheated by the tubular heating furnace, rich in CH 4 The raw material gas is preheated to 400°C, and the oxygen-enriched air is preheated to 250°C; after the preheating, the two gases enter the non-catalytic oxygen-enriched reformer to undergo combustion reaction and heat up, and the CH 4 Converted into CO and H 2 , Forming a high-temperature conversion gas with a temperature of 1340℃.
[0049] At the same time as the above, the top gas from the shaft furnace that produces sponge iron is cooled to 210°C by the heat exchanger, enters the scrubbing tower, is washed to remove dust and cooled to 40°C, then pressurized to 0.45MPa by the press, and then enters the vacuum The pressure swing adsorption hydrogen purification device (VPSA) produces purified hydrogen with a purity of more than...
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[0054] Example 2
[0055] Reduce ordinary iron ore to make sponge iron
[0056] Natural gas is purified and pressure-regulated as rich CH 4 The raw material gas and oxygen-enriched air are respectively preheated by the tubular heating furnace, rich in CH 4 The raw material gas is preheated to 350°C, and the oxygen-enriched air is preheated to 260°C; after the preheating, the two gases enter the non-catalytic oxygen-enriched reformer to undergo combustion reaction and heat up, and the CH 4 Converted into CO and H 2 , The formation temperature is 1350℃ high temperature conversion gas.
[0057] At the same time as the above, the top gas from the shaft furnace that produces sponge iron is cooled to 210°C by the heat exchanger, enters the scrubbing tower, is washed with water, and the temperature is reduced to 40°C, and then pressurized to 0.8MPa by the press before entering the vacuum The pressure swing adsorption hydrogen purification device (VPSA) produces purified hydrogen with a puri...
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