In Masteel,7.63 m coke oven adopts desulfurization and denitrification technology by active coke,in which the by-products can be used to produce ammonium sulfate.This solution can reduce investment and have no secondary pollution.And the 6 m coke oven adopts an integration of dry desulfurization plus dust removal technology,which is characterized with less land occupation,low investment,and no by-products generation such as solid waste.The actual production proved that using active coke has lower operating cost in running the desulfurization and denitrification system.