The difference between blast furnace gas and coke oven gas
The difference between blast furnace gas and coke oven gas
Coke oven gas refers to the combustible gas obtained by blending several types of bituminous coal into coking coal, which is then subjected to high-temperature dry distillation in the coking furnace, while producing coke and tar products. It is a byproduct of coking products. One ton of coal can produce 730-780 kilograms of coke, 300-340 cubic meters of coke oven gas, and 35-42 kilograms of tar during the coking process. Coke oven gas has high calorific value, fast combustion, short flame, and a small proportion of generated waste gas. The main components are methane, hydrogen, and carbon monoxide, which can be used as fuel and chemical raw materials.
Blast furnace gas is the gas that escapes from the top of the blast furnace and is a byproduct obtained during the ironmaking process of the blast furnace. About 60% of the heat from blast furnace fuel is transferred to blast furnace gas. According to statistics, blast furnaces can produce approximately 3800-4000 cubic meters of blast furnace gas for every ton of coke consumed. The theoretical combustion temperature of blast furnace gas is about 1400-1500 ℃. In many cases, it is necessary to increase its combustion temperature by preheating the air and gas to meet the user’s requirements. When blast furnace gas escapes from the blast furnace, it contains a large amount of dust, about 60-80 grams per cubic meter. Blast furnace gas and coke oven gas can generally be used as raw materials for steam gas combined cycle power generation.