Patent GB-708558-A (GB)
Title: Improvements in and relating to furnace walls
Inventor: HOSBEIN LOUIS HENRY
IPC: F27D1/00
Filed: 1951-10-31
Abstract: 708,558. Furnace walls. DETRICK CO., M. S. Oct. 31, 1951, No. 25473/51. Classes 51 (1) and (2) A furnace wall structure comprises an outer metallic framework spaced from an inner refractory wall including duplicate blocks mounted on and given vertical support by refractory spacing or bracket members supported by metal brackets on the aforementioned framework, the space between the outer framework and the inner wall being filled by insulating material. The outer framework comprises vertical girders 20 secured to which are spaced horizontal channel members 21 formed on the flanges with members 22, 23 having upwardly and downwardly disposed free edges, vertical retainer bars 24 having shoulders engaging members 22, 23 and held in position by hooks 27 engaging the lower flanges of the channel members 21, said bars 24 being formed with a plurality of channels 28, Fig. 7, each having a pair of lugs 30 supporting retaining brackets 31 formed with inwardly extending hook-like arms 33. Further brackets 35 hooked onto the members 22 and brackets 35' engaging extra lugs 30' in the lowermost channel 28 are both formed with platforms 44 and support brackets 41 formed with inwardly extending hooklike arms 33'. In order to economize on expensive metal brackets and to provide a more efficient refractory wall, the inner bricks 64, 64' are connected to the outer metallic framework by refractory brackets or spacing members 45, Fig. 6, of the type disclosed in Specification 563,593. Each spacing member 45 is a block formed with vertically extending grooves 52 and 53 in each side wall near the outer face 47 and recesses 56 and 60 in each side wall towards the outer face 46, said recesses having sloping walls 57, 58 and walls perpendicular to the block faces at the outer end. In assembling the refractory spacing members, the lowest member 45, Fig. 2, is seated on the platform 44 of the lowest bracket 35' and the hook-like arms 33' of the bracket 41 engage the slots 52. The upper members 45' are alternately inverted from the position of the member 45 so that slots 52 in adjoining members 45' engage the arms 33 of the retaining brackets which thus retain a vertically adjacent pair of refractory spacing members, The height of the bracket members 45, 45<SP>1</SP> relative to the length of the bars 24 is such that the central bracket member 45' in any vertical row thereof will have a bracket member 31 for retaining the same. The T-shaped sections formed at the inner ends of the spacing members by the recesses 56 and 60 engage projections 66 and 67 of adjacent wall blocks 64, 64'. The projections 66 extend nearer to the side faces of the blocks 64 than the projections 67 so that by reversing the blocks the vertically adjacent rows can be staggered. Two vertically adjacent rows of blocks 64 are connected to each bracket 45 and two vertically adjacent rows of blocks 64' to each bracket 45<SP>1</SP>. A layer of insulating cement 70 fills in the spaces between the metallic framework and the wall blocks faced by insulating blocks 71 and the cement also fills in spaces formed between projections 66, 67 of adjacent bricks where these do not receive refractory brackets 45 due to the spacing of the bars 24, Fig. 5 (not shown). Expansion joints filled with refractory cement 72 are provided between the pairs of blocks 64 mounted on the brackets 45, i.e. between each wall section.