Iron & Steel Technology
Project & Plant Management, Energy & Utilities and Environmental Technologies
Special Features Include:
Table of Contents
This paper details ArcelorMittal Indiana Harbor’s project to convert waste blast furnace gas into electricity, thus lowering energy costs and emissions. A new, 88%-efficient boiler produces 350,000 lbs. of steam per hour, generating enough electricity to power 30,000 homes. The project saves an estimated 4.6 trillion Btu and reduces CO2 emissions by 340,000 tons annually.
A new fume treatment plant at Ovako’s Smedjebacken plant is equipped with environmentally friendly features, including a heat exchanger for conveying hot water to the nearby community and a quenching tower and carbon injection that maintain dioxin emissions below best available technology limits. Started up in 2013, it has an improved canopy as well as lower electricity consumption.
In 2012, Elbe-Stahlwerke Feralpi (ESF) installed the world’s first EAF waste heat recovery plant with cogeneration based on organic Rankine cycle (ORC) technology. The background for the investment and the technological choices are explained, along with project milestones, commissioning and first operational results.