Dear Manjunath,Experiments ...

Dear Manjunath,

Experiments confirm that ozone provides the optimal means for the minimization or elimination of cyanide releases from the water-supply cycle of blast furnaces. The cyanides are completely decomposed, with no wastes and without the need for other reagents.

Cynide formation in furnace is largely due to composition of the raw materials and the reactions occurring in the lower part of the furnace at 2000– 2500°C. Nitrogen and hydrogen from the blast, components of natural gas, and volatiles from the coke react with the hot coke to form cyanogen. The pres ence of alkalis in the raw materials and their accumulation in certain temperature zones of the furnace facilitate the formation of solid cyanides KCN and NaCN. These cyanides are captured by the ascending flux of blast furnace gas and entrained to the upper part of the furnace, where some of the cyanides break down at ≤1000°C, reducing iron oxides. Some cya nides are oxidized at 635°C, forming small solid crystals, and are deposited on the batch, with which they fall into the high temperature zone. A considerable quantity of cyanides is entrained with the blast furnace gas to the gas purification system. In the blast furnace gas, cyanides are present.

Please find attached herewith article.

Regards,

Prem Baboo