A V-, Y- or U-shaped stainless steel rod, or a ceramic anchor brick hung from steel, attached to the furnace shell to key a castable or plastic lining to it. Metal anchors typically reach about two-thirds to three-quarters of the lining thickness, are spaced on a set grid and get tip caps or a coating so they can expand without cracking the refractory. The alloy, from 304 up to 310 or nickel alloys, is picked for the temperature at the tip.
Half the anchors on that wall aren't welded all the way round, fix them before the castable goes in.
Hit every anchor with a hammer before the pour. A ringing anchor is welded; a dull one is coming off with the first heat.
Also heard as
- V-anchor
- Y-anchor
- refractory anchor
- ceramic anchor
Related terms
Hex mesh
Hexagonal steel grid welded to a shell to hold thin erosion-resistant linings, mainly in refinery cyclones.
Castable
Dry refractory mix of aggregate, fines and binder that is mixed with water and poured or pumped like concrete.
Plastic refractory
Moist, workable refractory delivered ready to use and pounded into place with a pneumatic rammer.
Spalling
Cracking off of pieces or layers from the hot face of a refractory lining.