cement kiln bricks Failure

1. Cement Kilns Design features of rotary kilns
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Early rotary kilns
Wet and semi­wet
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Precalciner kilns
case during the experimental first decade of the twentieth century, when the service life of
refractories was often very short. For this reason, from the first patents onward, the kiln hood
was mounted on wheels or rollers so that it could be rolled back from the kiln nose. The need
to do this later became a reason for restricting the size and cross­section of kiln hoods.
Hood of Wilmington Kiln 4 from the south in 1921. Typical FLS design of the time with
a concentric cooler below the kiln.
A significant step­change in hood design came with the Fuller grate cooler patent, which put
heavy emphasis on the speed of cooling of the clinker and the aerodynamics of the
secondary air. This led to the installation of deeper hoods, and the escalation of both hood
depth and kiln diameter led to the abandonment of moveable hoods in the early 1960s.
Modern large hoods have doors in the front large enough for small vehicles to enter the kiln.
© Dylan Moore 2013: last edit 26/08/14.