Customer

Mittal Steel

Location

East Chicago, Indiana

Capacity

94 MW electric
930 kpph steam

Project Description

Mittal Steel (formerly Ispat Inland Inc.) teamed with Primary Energy to address escalating energy costs and environmental concerns by taking advantage of waste heat generated by a proposed onsite coke-making facility. Primary Energy collaborated with Mittal Steel's management and operations team along with Sun Coke (owner/operator of the coke battery) to develop a 95 MW waste heat recovery, combined heat and power (CHP) facility that provides electricity and process steam to Mittal Steel's steel-making operations.

Commercial Operation

1998

Benefits

The combined coke-making and energy facility includes an integrated, first-of-its-kind CHP project using waste heat recovered from non-recovery coke batteries. The facility supplies one-fourth of Mittal Steel's total electrical requirements and 85% of its process steam needs, replacing onsite, coal-fired generation that was shut down soon after the facility came on-line. The Cokenergy project serves as the pollution control device for the coke battery, substantially reducing SO₂ and particulate emissions associated with coke production. The United States Environmental Protection Agency has determined the technical approach to represent Maximum Achievable Control Technology, setting a new industry standard for environmental performance. In addition, the use of waste heat to produce electricity instead of purchasing the power form regional electric utilities, diplaces on average 13,000 tons of NOx, 15,500 tons of SO₂, and 5 million tons of CO₂ emissions per year.