a clear edge Mechanical vacuum systems for steel degassing Vacuum science... product solution.

a clear edge energy efficiency through vacuum

Mechanical vacuum systems for steel degassing Edwards leads the way in vacuum for secondary metallurgy by a considerable margin. Our leading market position is built on our understanding of customers processes and our expertise in providing vacuum solutions for VD, VOD and RH processes. Edwards has by far the largest installed base of dry pumps in the global steel industry, including the world's largest mechanical vacuum pumping system, in China. Used for degassing 230-tonne batches of liquid steel, the system has a pumping capacity of 1,000,000 m3/hr at 0.67 mbar. Yet our systems require the...

Dry mechanical pumps or steam ejectors? It's a key decision. For VD, VOD and RH processes, the smart money is on dry technology. Increasingly mechanical dry pumps are replacing traditional steam ejectors as the vacuum technology of choice for new installations, and the trend is accelerating. It is not hard to see why. Lower running costs and improved productivity are just two of the reasons. Dry pumps have been proved to reduce energy costs by as much as 97% compared to steam ejectors. High reliability and dependable performance are also key factors, given the exceptional demands that secondary...

Processes in the growing secondary metallurgy sector depend on several vacuum-based treatments: Vacuum Degassing (VD) for alloy steels; Vacuum Oxygen Decarburising (VOD) for stainless steels; and combinations of both treatments, for example Vacuum Degassing Oxygen Blowing (VDOB) and Vacuum Carbon Decarburising (VCD), for low and ultra-low carbon steels. These processes operate at varying vacuum levels, with different process gas loads, and in differing types of vacuum vessels, including tank, lid, ladle to ladle, stream and RH designs. Edwards vacuum systems have been successfully applied to...

Note: this is an example of a typical steel degassing module system for VD applications. Edwards systems can be adapted for individual customer requirements

Operating costs Steam ejectors Dry running pumps including filter €/tonne €/tonne On a typical VD plant processing 300,000 tonnes of steel per year, the operating costs of a modular dry pump system can be less than 10% of the equivalent steam ejector system. Service and support Our expertise is in vacuum technology, we have been in the business since 1919 and our knowledge runs deep. We design, develop and manufacture vacuum equipment to the very highest standards. But it's not just the technology. With a global installed base of 750,000 pumps, we understand how vacuum pumps and systems...

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