Study on Combustion Characteristics of the Blast Furnace Gas in the Constant Volume Combustion Bomb

Blast furnace gas is the byproduct of smelting steel production process, and is the important secondary energy source. It is can be used as fuel for engines to generate electricity for most middle and small steel enterprises. In order to understand the combustion mechanism and provide the basis for the design of blast furnace gas engine,premixed laminar combustion experiments of the blast furnace gas-air mixture were performed in the constant volume combustion bomb. The effects of the equivalence ratio, the initial pressure, the initial temperature and the diverse components of blast furnace gas on laminar combustion velocity and flame transition velocity were investigated. The results indicate that the combustion velocity increases when the equivalence ratio is close to the academic air-fuel-ratio ( 0 . 1 = Φ ), and the maximum appears at the equivalence ratio of 1.15. Premixed laminar burning velocity of the blast furnace gas-air mixture decreases with increase in the initial pressure, and it increases with rising of initial temperature. An increase of the amount of combustible gas in various components blast furnace gas can augment the numerical value of the laminar burning velocity and help to combustion. Key-Words: Constant volume combustion bomb; Blast furnace gas; Combustion characteristic; Laminar burning; Burning velocity; Premixed burning