Gas base and coal base combined shaft furnace direct reduction process
A combined, shaft furnace technology, applied in shaft furnaces, furnaces, furnace types, etc., can solve problems such as restricting wide application, production cost and engineering investment are difficult to be competitive, and achieve lower production costs, strong resource adaptability, The effect of process simplification
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Embodiment 1
[0027] Such as figure 1 As shown, lignite is used as the main raw material for the production of reducing gas, and pellets, lignite and limestone of suitable particle size are mixed with 1000kg of pellets to add 500-2500kg of lignite and 30-250kg of limestone to form a mixture 101, from The top of the shaft furnace reactor 100 is loaded into the furnace, and a part of lignite powder 102 is sprayed into the upper area 104 of the shaft furnace reactor from the lignite lance 103. Position; the temperature in the upper area 104 and the middle area 106 of the shaft furnace reactor is maintained at a suitable temperature between 800-1350 °C, the reducing gas and material flow in the furnace are all running downward, and the temperature in the lower area 107 of the shaft furnace reactor is 500~750℃. The pyrolysis of lignite in the furnace, the gasification reaction of carbon, and the reduction reaction of pellets are completed in the middle area 106 of the shaft furnace reactor.
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Embodiment 2
[0031] Such as figure 2 As shown, lignite is used as the main raw material for the production of reducing gas, and pellets, lignite and limestone of suitable particle size are mixed with 1000kg of pellets to add 500-2500kg of lignite and 30-250kg of limestone to form a mixture 101, from The top of the shaft furnace reactor 100 is loaded into the furnace; the temperature of the upper area 104 and the middle area 106 of the shaft furnace reactor is maintained at a suitable temperature between 800 and 1350 ° C, and the reducing gas and material flow in the furnace are all running downwards. The temperature in the lower zone 107 of the shaft furnace reactor is 500-750°C. The pyrolysis of lignite in the furnace, the gasification reaction of carbon, and the reduction reaction of pellets are completed in the middle area 106 of the shaft furnace reactor.
[0032] The reducing gas 201 is discharged from the exhaust port at the lower part of the shaft furnace reactor, and the exhaust ...
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