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[August 2004]
CERIC WISTRA Kiln for High Alumina Bricks Exceeds Expectations
RATH, the manufacturer of high quality refractories, is now benefitting from the installation of a new CERIC WISTRA shuttle kiln, purchased in order to increase production.
The new kiln was required to work with existing kiln cars and loading/unloading stations. It was decided that the best solution was to design a kiln with a four-car configuration and downdraft operation, to be accommodated into the existing building.
High quality alumina lightweight bricks have been used for the hot face lining of the sidewalls and arched roof with a back-up consisting of insulation bricks and insulation slabs. In order to optimise the life of the lining, the hot face refractories of the walls are interlocked with a special tongue-and-groove system. Special high alumina retainers and heat resistant anchors connect the refractories to the steel.
The combustion system has been developed for maximum temperature uniformity inside the kiln and takes into account the load and weight differences between the kiln cars. The temperature of each burner is measured by a separate thermocouple and an additional gas valve for each burner is actuated according to possible temperature deviations. This controls the increase or reduction of the fuel flow to each burner. The standard level of temperature deviation in the firing channels is 1°C. The design concept for kiln control is 10 burners in five firing channels. Temperature uniformity in the kiln has exceeded original customer expectations.
CERIC WISTRA said that the combination of excellent temperature uniformity, precise ratio regulation and heat recovery provide the lowest possible energy consumption.
www.ceric-wistra.com
ENDS