Arch of arch foot brick and top are not identical. Customarily of our worker master worker calls cup one hand in the other before the chest small Xuan, call the top big Xuan, but arch and top are size not only is different. With open-hearth furnace for, the lid above fusion room, furnace head, sedimentary room, regenerator and flue is called a top; And the lintel of the hole inside the wall is called arch, if steel mouth push without using one's hands is reached all sorts of repairing door arch. Of course arch and very appearance substantially are same, the cent like — is segment of a circle and hemicycle. Be built in build by laying bricks or stones or arch foot brick is used with respect to need when maintenance. Brick of any arch foot includes a right-angled triangle in fact, namely the banking angle that arch foot brick has two each other to be complement. For example, the another banking angle of the arch foot brick of =520 of banking angle Φ is 380, the 380 arch base that so the vault place of 1040 uses central part can use the another banking angle of brick of 520 arch foot. The two complement of the 380 roof arch feet that reach 440mm use ply so sometimes. Such, the standard banking angle of arch foot includes 300. 380, 450, 520 reach 600. The L of oblique plane length of arch foot brick should be equal to place to deserve to be apart from B with cuneate differ in roll end diameter, use commonly 114, 230, 300, 380 reach 440mm. The ply C of arch foot brick should be equal to place to deserve to use the significant measure C of wedge brick, use at the ply C=230mm of the arch foot brick of side wedge brick; Use at 230mm, the ply C of the arch foot brick of perpendicular wedge brick takes 114mm. To reduce weight, inclined and long 300, the ply halve of the 380 arch foot bricks that reach 400mm, namely 75mm. But when inclined top of shape of a flight of stairs of build by laying bricks or stones, often discover two arch | Move brick side by side build by laying bricks or stones is together, ply exceeds the width 150mm of vault brick annulus, because many brick is seamed, of dimension of brick of foot of together with arch the twist of deviation and area, its ply has amount to 160mm unexpectedly. This brings quite great difficulty to inclined top of build by laying bricks or stones. To eliminate this one defect, editing when firebrick size standard already the ply instead 73mm arch foot brick. The dimension side the two right angle of arch foot brick, can come out according to banking angle computation. But make firebrick to facilitate, reach surely assure fine be convenient to use to use. Kiln is the main component of kiln body very, it has conclusive effect to the life of kiln. Select material of kiln top place can bear for a long time high temperature action, weight is light, heat preservation performance is good, its structure should rigor is not flat, what be helpful for the air current inside kiln is reasonable distributing. Vault. Kiln top structure is one vaulted, go up for kiln wall through erect of arch foot brick, how does the kiln of both sides of arch foot brick set arch foot bridge on the wall, with bearing arch arises judge thrust, kiln wall peripheral has pillar, make through fluctuation pull rod kiln carries a whole that forms with kiln wall on the head closely. When undertaking vault is designed, the option of arch horn is very important, arch part is too small, the muscularity that arch brick place suffers, and because approve the systole that turns to be seamed with ash, in use produces the phenomenon that sink easily. Conversely, if arch part is large, arch radius is small, it is semicircle arch when arch heart horn is 180 degrees, after arch brick be heated expands, arch can be squeezed to rise and produce craze. Offer at the same time tall increase, the space between arch and goods is increased, cause fluctuation difference in temperature easily. Cause fluctuation difference in temperature so. So channel kiln uses 60-90 to spend arch heart part commonly. Chosen arch foot brick should agree with the angle of arch. Arch foot brick can be made the same score with build by laying bricks or stones of the wall inside kiln furnace, arch does not apply the stuff with low intensity to fill up between crural brick and arch foot bridge. Fireproof material occurrence craze, fall off, easy how to wear away to do? Want to solve a problem thoroughly, need to be dug from germ, the analysis gives real reason, flourish Cheng Naicai is engaged in be able to bear or endure service of timber production, research and development is old, can solve all sorts of difficulty problems of liner of furnace of high temperature kiln, welcome broad new old friend to seek advice reach technical communication.
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