Supplement DF-M1 Page 3
† Matrix can be installed by either of the following methods: a) Lay up refractory brick to level of top of matrix open- ing. Pour castable around tile or ram plastic refractory from above (using form on inside of furnace wall). When castable or plastic hardens, lay up brick above it. b) Lay up brick several courses above matrix opening using a spanner tile, lintel, or arch to span the matrix opening and ram from inside furnace. Enough brick must be laid above span to permit ramming against it.
Furnace Shell
Figure 3. Tile shears off due to unequal expansion of re- fractory and shell or unequal expansion between layers of refractory. Expansion joints in refractory brickwork and matrix around tile prevent this.
Burner Tile
F.B. Wall
Mtg. Plate
Furnace Shell
Figure 4. Tile fails in tension as a result of bowing or buckling of the shell or brickwork. Pre- vent this by using more rigid shell, buckstay, and brac- ing construction. Install high temperature matrix as shown in Figure 2 to avoid passages that would permit "fluing" of gases through brickwork to the shell.
Burner Tile
F.B. Wall
Mtg. Plate
rammed, cast, or brick refractory
plastic sheet to prevent water absorption by sur- rounding refractory from tile/matrix
structural members suitable to prevent furnace shell plate from buckling
9 in. min. or ½ tile ID, whichever is greater*
independently rammed or cast tile/matrix section, not bonded to surrounding refractory; burner tunnel of shape dimensions speci- fied by burner manufacturer, formed by a mandrel
tile ID
* 6796 burner with 30° taper tile and thick wall may require a larger tile.
Install a minimum of four refractory anchors equally spaced around the burner opening with a maximum chord spacing of 18"
back-up insulation furnace shell plate
Figure 5. For large burners with which no refractory tile is supplied. Expansion joints must be provided in surrounding refractory to prevent pres- sure being exerted on cast or rammed burner tunnel section.
CONTACT fna.sales@fivesgroup.com T +1 800 626 3477 - F +1 216 373 4237
Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA www.fivesgroup.com
Made with FlippingBook flipbook maker