Abstract: Coke oven gas and steam were used as the hydrogen-based injection media to analyze the effects of injection media， injection mode and the amount of gas injection on the release of typical pollutants in the sintering process. The results show that the temperature distribution of the sintering layer has obviously improved， with the high temperature range of 1200-1300℃ widened evidently， after the hydrogen-containing gas is injected. After the coke oven gas(0.6%Vol.) was injected on the sintering material surface， the peak concentration of NO_○x in flue gas is reduced by about 100mg/m³， and the average concentration is reduced by 21.1%. This is mainly because the gas injection broadens the high temperature range of the material layer and the injection of steam on the sintering material surface has a significant effect on the reduction of CO emissions. After the steam is sprayed， the CO in the sintering flue gas is reduced from 11690mg/m³ to 9918mg/m³， a decrease of 29.4%. This is mainly because water vapor reacts with the carbon in the sintering raw material to produce water gas. The simultaneous injection of coke oven gas and water vapor on the sintering material surface can achieve a comprehensive reduction of NO_○x and CO emissions.

Key words: sintering process; fuel gas injection; steam injection; carbon monoxide emission reduction; nitric oxide emission reduction