Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln
A gas-based shaft furnace and combined production technology, applied in the field of metallurgy, can solve problems such as high cost, restrictions, and high pollution, and achieve the effect of eliminating high energy consumption and solving the insufficient circulation of oxygen blast furnace top gas
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Embodiment 1
[0093] refer to figure 1 and 2 , the details of the combined production system and method of an oxygen blast furnace and a gas-based shaft furnace are:
[0094] 1) After the blast furnace top gas of the oxygen blast furnace 10 is dedusted by the dedusting device 30, the gas is divided into two parts. The first part of the gas enters the water gas shift device 40 to generate H 2 , and then enter the CO 2 The removal device 50, the second part of the gas directly enters the CO 2 Removal device 50, two parts of gas are mixed with gas-based shaft furnace top gas to remove part of CO 2 , after being pressurized by the pressurizer 60, it enters the gasifier 70 to react with oxygen and pulverized coal to obtain H 2 The high temperature reducing gas with / CO=1~2:1, a part is blown into the oxygen blast furnace 10 from the upper air inlet and the lower air inlet of the oxygen blast furnace, and the other part enters the gas-based shaft furnace 20 to reduce and oxidize the pellets ...
Embodiment 2
[0113] It is basically the same as Example 1, the difference is:
[0114] According to theoretical calculation, 3000m 3 Oxygen blast furnace production technical indicators are as follows:
[0115] Oxygen consumption of oxygen blast furnace (90% purity): 245Nm 3 / tHM
[0116] Oxygen blast furnace coal ratio: 200kg / tHM
[0117] Oxygen blast furnace coke ratio: 178kg / tHM
[0118] Furnace top gas volume: 1357Nm 3 / tHM
[0119] Top gas composition: CO: 50.4%, CO 2 : 36.9%, H 2 : 6.3%, H 2 O: 2.6%, N 2 : 3.8%
[0120] Oxygen blast furnace output: 12600tHM / d
[0121] Gasifier oxygen consumption (90% purity): 162Nm 3 / tHM
[0122] Gasifier pulverized coal consumption: 225kg / tHM
[0123] Composition of circulating gas: CO: 45.8%, H 2 : 48.4%, N 2 : 5.8%
[0124] Circulating gas temperature: 1100°C
[0125] Circulating gas volume at the upper air outlet: 382Nm 3 / tHM
[0126] Circulating gas volume at the lower air outlet: 400Nm 3 / tHM
[0127] Gas-based shaft fur...
Embodiment 3
[0129] It is basically the same as Example 1, the difference is:
[0130] According to theoretical calculation, 5000m 3 Oxygen blast furnace production technical indicators are as follows:
[0131] Oxygen consumption of oxygen blast furnace (95% purity): 225Nm 3 / tHM
[0132] Oxygen blast furnace coal ratio: 200kg / tHM
[0133] Oxygen blast furnace coke ratio: 191kg / tHM
[0134] Furnace top gas volume: 1368Nm 3 / tHM
[0135] Top gas composition: CO: 51.8%, CO 2 : 37.5%, H 2 : 6.6%, H 2 O: 2.6%, N 2 : 1.5%
[0136] Oxygen blast furnace output: 21000tHM / d
[0137] Gasifier oxygen consumption (95% purity): 133Nm 3 / tHM
[0138] Gasifier pulverized coal consumption: 200kg / tHM
[0139] Composition of circulating gas: CO: 47.8%, H 2 : 49.0%, N 2 : 3.2%
[0140] Circulating gas temperature: 900°C
[0141] Circulating gas volume at the upper air outlet: 382Nm 3 / tHM
[0142] Circulating gas volume at the lower air outlet: 400Nm 3 / tHM
[0143] Gas-based shaft furn...
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