Metal-casters have long been recognized as some of the world’s first recyclers. For centuries, foundries have been making new metal objects by re-melting old ones that were once unwanted scrap. While this is a good foundation for a claim that a well-run iron components supplier is an environmentally sustainable business, other opportunities exist to improve a manufacturer’s environmental performance.
Waupaca Foundry, Inc. (WFI) has developed primary business goals to achieve sustainable growth between now and 2020. WFI will continue to implement the following actions through 2018:
WFI is proud to announce that as a result of ongoing successes achieved in 2017 related to the above described efforts, our organization was named Modern Casting magazine’s 2018 Metal-caster of the Year and WFI’s President, COO and CEO Mike Nikolai was recognized by the Wisconsin Sustainable Business Council for the Sustainable Leadership Award.
Since 2004, significant energy use reduction activities have included heat recovery for building /hot water heating, energy efficient lighting retrofits, and the widespread use of premium high efficiency motors. WFI was recognized as an energy use reduction leader as a recipient of Wisconsin’s 2009 Governor's Award for Environmental Excellence at its Plant One facility in Waupaca, Wisconsin. The recognition honored a groundbreaking heat recovery system that recovers waste heat from the cupola melting of iron scrap and uses it for heating the facility through the cold Wisconsin winters.
WFI continued to pursue this primary sustainability goal through 2018 via implementation of energy use reduction projects and the formal energy management program (ISO 50001) at WFI Plant 1 in Waupaca, Wisconsin. To WFI’s knowledge, this certification represents only the second facility in Wisconsin and the first in the U.S. for a metal-caster.
These efforts led to a 19.5% reduction in company-wide energy intensity, as compared to a 2009 baseline.
The air pollution control systems we install at our facilities are considered as “best available” by the U.S. Environmental Protection Agency and the State of Wisconsin for all processes regardless of the original installation date. Nearly a decade before the implementation of the Federal “maximum achievable” control requirements for the iron and steel industry, WFI was proactively retrofitting process air pollution control equipment in advance of the newly defined state of the art. Of equal importance, filter leak detection instrumentation has been broadly utilized by WFI facilities as an elective technology to achieve superior air pollution control results.
This leadership philosophy does not hold a numerical annual metric but represents a continuation of the ongoing effort by WFI to promote alternative processes and maintain state-of-the-art pollution control technologies as recognized by U.S. EPA and the State of Wisconsin.
WFI has recognized a tremendous opportunity in the potential to reuse spent foundry sands (and slag) for beneficial purposes. Our casting processes require large volumes of sand, which are continually used, reconditioned and reused in the foundry. Sand that can no longer be used in the foundry process can be beneficially reused in lieu of disposal via landfilling. With systems in place to screen metal chunks and debris out of the sand, foundry sand represents a clean, non-toxic product that can be used in a variety of applications and industries. Examples of such uses include geotechnical fill, road construction, agricultural use, cement manufacturing, concrete products and asphalt.
WFI has been recycling foundry sands for over two decades and has worked in partnerships with state and local agencies (such as the Wisconsin Department of Transportation) to complete projects that would have required substantial quantities of native sand and gravel materials. Using foundry sands and slag for these projects is not just a better use for WFI’s byproducts but has the added benefit of preventing the need to mine native materials elsewhere for the same project. The benefits of foundry sands as a non-toxic resource has become increasingly promoted by state and federal government, along with new research that demonstrates foundry sand’s benefits as soil amendments, manufactured topsoil, and highway subbase fill (among many other uses).
WFI’s past efforts have resulted in over 70% of the byproducts generated from the foundry process now being incorporated into a multitude of local beneficial reuse projects. For 2016, this significant achievement was expanded by the segregation and development of additional reuse materials. Companywide, WFI now provides for offsite reuse over 80% of all available foundry sand and 69% of all available byproducts including foundry slag.
Historically, operating a successful foundry required water….a lot of water. Water had been consumed in several ways, including process water requiring treatment as a result of air pollution control activities, and non-contact cooling water used to cool running machinery. As a result of plant improvements implemented by WFI over the last decade, process water requiring wastewater treatment and discharge has been completely eliminated from WFI facilities.
Following that accomplishment, WFI initiated the investment and installation of closed loop cooling water systems to eliminate the remaining significant contributor to plant water usage in the form of “once through” non-contact cooling water. Completed systems have demonstrated overwhelming success, with individual plant cooling water demands being cut by 80% or more, and non-contact cooling water discharges reduced to near zero. Due to these improvements, in 2017 WFI saw a 64.3% cumulative reduction in companywide water use.