In recent years, spraying technology on sintering bed has become a hot research topic, the general effect of expectations by spraying medium is to achieve energy-saving, emission reduction and improvement of sintering indexes. Effects of spraying natural gas, coke oven gas, oxygen, sintering in flue gas and exhaust gas from sinter cooler were studied by former researchers. Influence of sintering surface spraying steam on sinter quality and emission were studied. The results showed that spraying steam can be beneficial for CO emission reduction during sintering process and there was a suitable spraying amount to improve the quality of the sinter.