Anchors

 

 

Function

Roof , Wall or Floor

– Temperature?

– Chemical attack on the anchors?

– Do they need to support the weight of the lining?

– Or are the anchors only required to hold the lining in place?

– Type and thickness of the insulation?

– Expansion/movement of the lining?

 

 

Materials

• Steel alloy anchorsMax. spec. temp. Actual max. temp

–304 (Cr/Ni 18/8) 1.4301 800oC 900 - 1000oC–309 (Cr/Ni 1.4828 1000oC–253MA (Cr/Ni ) 1.4893 1050oC 1100 - 1200oC–310/314 (Cr/Ni 25/20) 1.4841 1150oC 1100 - 1200oC–310S (Cr/Ni 25/20) 1.4845 1150oC 1100 - 1200oC

Other factors : Stable/fluctuating temperatures, Sigma phase development, Chemical attack,

• Ceramic anchors 1400 - 1800oC

– Pressed brick– Precast LCC

 

 

Steel Alloy Anchors

• Flat anchors–Simple to produce–Low cost

•Round anchors–Corrugated

 Cast steel anchors

Steel Alloy Anchors

• Guidelines

– Length of anchor 2/3 of total lining thickness

Never closer to the hot face than 20mm

– Size 6 – 12mm depending on load and risk of chemical attack

– Spacing Lining thickness 200 – 350mm : spacing 200 – 250mm

Lining thickness under 100mm : spacing 50 – 100mm

– Welding Electrode must match the highest grade of steel used

– Expansion Always use plastic caps

Ceramic AnchorsPressed brick anchors

Ceramic Anchors

Traditionally - plastic or wooden wedges are used to hold the anchors horizontal

Ceramic Anchors

Ceramic Anchors

Precast LCC Anchors

• Round shape

• Smaller diameter

• Stronger

• Same expansion as

the castable

Ceramic Anchors

Pressed brick anchors

Precast LCC