Riedhammer: the new HWS shuttle kiln for sanitaryware

Riedhammer, a Sacmi Group member company specialising in thermal plant for sanitaryware and tableware, offers a wide range of kilns with innovative technological solutions. In particular, these solutions provide a homogeneous temperature distribution at every stage of the firing cycle regardless of the properties and characteristics of the load. These excellent results owe much to the synergy with Sacmi Forni, whose experience has helped to further improve already rugged, simple and reliable products.
The various kiln models can satisfy all production requirements. For example, the new HWS shuttle kiln for sanitaryware has a modular design in terms of both length and height (depending on the type of production), making it suitable for firing loads with widely differing weights and geometries (up to three layers per car). Irrespective of the load arrangement, uniform heat treatment is guaranteed by a constant homogeneous heat distribution in every kiln section throughout the set heating curve. This characteristic is essential for good firing and is the result of a number of design elements:

- high-velocity burners, flanking the kiln cars alternately on both sides of each module, generate a special convection exchange geometry;
- the offset arrangement of 2 high-velocity bottom burners per kiln car ensures homogeneous circulation of the flue gases underneath the kiln car load;
- the oscillating diffusion air (known as “sweep”) used for these burners intensifies the circulation effect, permits optimal adaptation of the heating curve to the product requirements and guarantees a stable kiln atmosphere;
- separate regulation groups for optimal control of flue gas temperatures in different firing heights;
- a special pneumatic system installed in the flue, which uses transmitter signals to control the internal pressure by increasing or reducing flue gas release (the natural draught keeps the kiln room in a partial vacuum);
- an automatic temperature measurement and regulation system distributed with precision on the basis of methodical test-run results.