This product is often used for the deep treatment of coking wastewater, easily dissolved in water, and has no corrosive effect on pipeline equipment, and has a high removal rate ofchroma, SS, COD and BOD ofcoking wastewater. At present, coking wastewater is treated by biological method after discharge, such technology is one ofthe common processes in the coking industry at present, but because ofthe complex composition of coking wastewater, poor biodegradability, external drainage is dark brown, it needs todecolorize, the common decolonizing agent in the industry is activated carbon, but because of the slowabsorption of activated carbon, large consumption, the regeneration of activated carbon after use isdifficult. Not particularly respected, coking wastewater cyanogen is a relatively simple and practical watertreatment agent.