Blast furnace slag gasification system and method

[0047] Example one

[0048] (1) The coal with a carbon mass fraction of 81.51% is broken into pieces, and the blast furnace slag particles at 1380°C are granulated;

[0049] (2) Add the blast furnace slag particles and coal lumps to the blast furnace slag gasification unit at a mass ratio of 3.5:1;

[0050] (3) The moist air is introduced into the blast furnace slag gasification device through the air inlet. The coal block undergoes a gasification reaction with the moist air under the heat exchange of the blast furnace slag particles, and the gas products in the blast furnace slag gasification device exit through the coal gas. The gas port is discharged to the gas gathering device, and at the same time, the iron oxide in the blast furnace slag is reduced by the carbon in the coal;

[0051] (4) Coal ash and blast furnace slag particles produced after gasification are mixed into mixed slag and discharged through the slag outlet of the slag tray;

[0052] (5) The discharged mixed slag is cru

[0053] Example two

[0054] (1) The coal with a carbon mass fraction of 83.25% is crushed into 40mm coal lump, and 1310℃ blast furnace slag particles are granulated;

[0055] (2) Add blast furnace slag particles to coal lumps into the blast furnace slag gasification unit at a mass ratio of 5.5:1;

[0056] (3) The moist air is introduced into the blast furnace slag gasification device through the air inlet. The coal block undergoes a gasification reaction with the moist air under the heat exchange of the blast furnace slag particles, and the gas products in the blast furnace slag gasification device exit through the coal gas. The gas port is discharged to the gas gathering device, and at the same time, the iron oxide in the blast furnace slag is reduced by the carbon in the coal;

[0057] (4) Coal ash and blast furnace slag particles produced after gasification are mixed into mixed slag and discharged through the slag outlet of the slag tray;

[0058] (5) The discharged mixed slag is crush

[0059] Example three

[0060] (1) The coal with a carbon mass fraction of 84.57% is crushed into 30mm coal blocks, and the 1350℃ blast furnace slag particles are granulated;

[0061] (2) Add blast furnace slag particles and coal lumps into the blast furnace slag gasification unit at a mass ratio of 4.5:1;

[0062] (3) The moist air is introduced into the blast furnace slag gasification device through the air inlet. The coal block undergoes a gasification reaction with the moist air under the heat exchange of the blast furnace slag particles, and the gas products in the blast furnace slag gasification device exit through the coal gas. The gas port is discharged to the gas gathering device, and at the same time, the iron oxide in the blast furnace slag is reduced by the carbon in the coal;

[0063] (4) Coal ash and blast furnace slag particles produced after gasification are mixed into mixed slag and discharged through the slag outlet of the slag tray;

[0064] (5) The discharged mixed slag