18 Our Commitment in Action CMC STEEL ARIZONA CMC’s commitment to more environmentally friendly steelmaking is embodied in our facility in Mesa, Arizona. CMC Steel Arizona, which was commissioned in 2009, is the first operational Electric Arc Furnace (EAF) mini mill of its kind in the world, utilizing a unique continuous rolling process technology that greatly enhances energy efficiency. Why is CMC Steel Arizona more efficient than conventional rolling mills? •  The EAF at our Mesa facility utilizes scrap preheating and continuous scrap feeding, reducing electricity consumption by 10 percent when compared to conventional EAFs. •  The caster feeds directly into the rolling mill without a natural gas fired billet reheating furnace as in conventional rolling mills; eliminating the reheat furnace saves about 1,200 standard cubic feet of natural gas per ton of bar product. •  The footprint is more compact than the conventional mini mill; this reduces the distance and energy required for operations such as pumping water, vehicle travel and other plant functions. •  The rolling mill receives a continuous and uncut billet which improves yield; in a conventional rolling mill the crops are collected and sent to the EAF for melting so they are not wasted, but the continuous process mini mill eliminates this “recycle” stream altogether. •  CMC Steel Arizona mini mill uses up to 39 percent less total energy per ton of bar product compared to CMC’s traditional mini mills. •  The advanced automation in this mini mill also contributes to safer working conditions for operators; with increased utilization, the system is always running which means operators are rarely in maintenance mode. CMC’s second continuous process mini mill, CMC Steel Oklahoma, is set to begin production in late 2017. CMC Steel Arizona CMC Steel Arizona reduces electrical energy consumption by 30-35 kWh (10%) and saves 1,200 standard cubic feet of natural gas per ton per year vs. a conventional mini mill. CMC Steel Arizona saves 2,500 pounds of iron ore, 1,400 pounds of coal, and 120 pounds of limestone per ton compared to traditional blast furnace steelmaking. 18