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 anchors Max. spec. temp.Actual max. temp –304 (Cr/Ni 18/8) o C o C –309 (Cr/Ni o C –253MA (Cr/Ni ) o C o C –310/314 (Cr/Ni 25/20) o C o C –310S (Cr/Ni 25/20) o C o C Other factors : Stable/fluctuating temperatures, Sigma phase development, Chemical attack, Ceramic anchors o C – 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 –Size6 – 12mm depending on load and risk of chemical attack –SpacingLining thickness 200 – 350mm : spacing 200 – 250mm Lining thickness under 100mm : spacing 50 – 100mm –WeldingElectrode must match the highest grade of steel used –ExpansionAlways use plastic caps

Ceramic Anchors Pressed brick anchors

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

Ceramic Anchors

Precast LCC Anchors Round shape Smaller diameter Stronger Same expansion as the castable

Ceramic Anchors Pressed brick anchors Precast LCC