EUROPEAN STEEL TECHNOLOGY AND APPLICATION DAYS 2017 - ESTAD 2017

Technological solutions, to utilize process gases from the iron and steel industry, to allow other production facilities , e.g. chemical industry, to use such energy sources, is becoming more and more attractive. One possible way, to convert the available energy from carbon and hydrogen-rich off-gases, such as coke oven gas, blast furnace top gas, direct reduction gas and also converter BOF gas into liquid based energy sources, is the use of a microbiological based process. Primetals and LanzaTech offer a special process gas microbial fermentation system, to produce preferably ethanol or other chemicals. To produce ethanol, an integrated fermentation system with additional downstream installations is required, with the main target to treat the fermentation product and waste streams. The treatment of the fermentation waste streams results in a number of by-products, usable for internal or external applications. By returning the by-products to an integrated steel plant, the fermentation system can be operated as a zero waste application and compensates portions from external added input materials e.g. natural gas or carbon based materials.