Filtration and Degassing

Degassing and filtration are paramount to the quality of the aluminium and yield of the casting process. And refractory lining and parts used in those types of equipment define their performance and reliability to major extent.

At its production site in Graham (NC, US), ex-Permatech facility, Vesuvius has unique production capabilities to manufacture 1-piece pre-cast crack-free deep bed filter and degassing liners as large as 10 tons with dimensions accurate to 0.1 inch and pre-fired typically to 649°C (1200°F). In special cases, pre-firing up to 815°C (1500°F) is possible at customer request.

Precast liners allow for tailor-made, repeatable configurations, and longer service life compared to cast-in-situ solutions, due to controlled dry-out.

Vesuvius also supplies consumable refractory shapes for deep bed filters (grid bars, sink plates, baffles). Those can be either produced based on customer drawings, or designed for optimal fit of the deep bed filter box itself and safe handling (piece weight) from EHS perspective. These products are available in Beta 2 GB - similar material to that of DBF liners - from our facilities in Graham (NC, US) and Ras Al Khaimah (UAE), or made of Alugard 70 at our facility in Rio de Janeiro (Brazil). 

For installation, assembly, maintenance and patching of DBFs, CFF bowls, and other cast house refractories, several types of Moldable (patching mastic) with excellent adhesion and non-wetting properties are available. 

And to ensure the best performance and life-time of aluminium-exposed refractories, Boron Nitride coating should be applied regularly to the refractory surface.