Sefa adds to fly ash capacity

A coal ash beneficiation plant at the Santee Cooper Winyah Generation Station in Georgetown, SC, has entered commercial operation, joining two other Sefa Group sites equipped with the proprietary Staged Turbulent Air Reactor (STAR) processing technology.

The stand-alone Winyah facility adapts to various fuels and raw feeds exhibiting a range of LOI (loss on ignition) carbon content, and will process material from inactive storage ponds plus dry ash from the station’s active coal-fired units. It is capable of 500,000 tons’ annual output, about 70 percent of which will meet ASTM C618 Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete guidelines.

Due to prolonged water exposure, Sefa notes, ponded coal ash undergoes chemical weathering, which reduces its strength-developing characteristics in concrete. Hence, simply drying and grading such material does not yield specification-level, finished ash. STAR processing restores concrete strength-imparting properties in pond ash, a strong value proposition for utilities aiming to lower or eliminate long-term storage or disposal liabilities.

Santee Cooper officials chose the Sefa process as part of their ash pond closure strategy. “[We] aggressively pursued innovative opportunities to empty ponds at Winyah, Jefferies and Grainger stations through recycling, or beneficially reusing, the ash,” says Lonnie Carter, the state-owned utility’s chief executive officer.

With 15-plus years in thermal beneficiation, yielding more than 5 million tons of processed ash, SEFA Group is promoting the STAR technology as a unique, proven solution for pond ash management and new source of ASTM C618-grade fly ash.

Source

(Visited 157 times, 1 visits today)

Get involved

Register

As a member of this site you will be able to receive aggregates news relating only to those categories that are most relevant to you, submit job listings for FREE, post questions in the Q&A, and more.

Register Now

Feature your company

The Feature Your Company listing is your custom-made (by us) profile page that allows you to add any of the following content: text, videos, links, images. The page will also be listed on the Featured Company landing page. Over 560 unique aggregates users visit the site per day! Complete the enquiry form now to contact us.

Contact us

Jobs

Are you looking for an aggregate related job? Click here to see our jobs listing supplied by industry experts United Employment.

See Jobs

Advertise

Reach thousands of budget holders and decision makers by promoting your company on the longest established aggregate website in the US & Canada. Or advertise in our emails which are sent to opted-in subscribers according to their chosen categories. All advertising will display correctly on tablets and mobiles as this site is responsive.