A roller kiln for producing foamed ceramic products

Abstract

The invention discloses a roller kiln for producing foamed ceramic products, which comprises a kiln chamber, and the kiln chamber includes a preheating and heating zone, an oxidation decomposition zone, a foaming firing zone and a rapid cooling and slow cooling zone; the rapid cooling The slow cooling zone includes at least two groups of cooling chambers arranged in parallel, and the foamed ceramic products to be processed are transported by a shuttle between the foaming firing zone and the cooling chamber; the preheating heating zone, oxidation decomposition zone and foaming The transmission rate in the firing zone is higher than that in the rapid cooling and slow cooling zone. On the premise of improving the production efficiency, the roller kiln of the present invention can still ensure sufficient cooling time for the foamed ceramics in the rapid cooling and slow cooling section, completely release the thermal stress, and improve the excellent rate of the foamed ceramics.

Description

technical field [0001] The invention relates to the technical field of foamed ceramics, in particular to a roller kiln for producing foamed ceramic products. Background technique [0002] As a new type of thermal insulation building material, foamed ceramics have the advantages of high strength, thermal insulation, sound absorption and noise reduction, and are applied in more and more fields. At present, most of the foamed ceramics are fired in tunnel kiln or traditional roller kiln. Specifically, the tunnel kiln is used for firing, and the foamed ceramic raw materials are mostly distributed in the box body, and the box body is placed on the kiln car in layers. Multiple kiln cars are close to each other and pass through the preheating section in the tunnel kiln along the track, oxidation After the decomposition section, the foaming firing section and the cooling section, it leaves the kiln. With this firing method, the degree of automation is low, and many links need to be...

AI Technical Summary

Problems solved by technology

[0004] However, this cooling mechanism is likely to cause inconsistencies in the internal and external temperatures of the foamed ceramics, resulting in thermal stress and affecting product quality

Moreover, after rapid cooling and then slow cooling, the cooling time is long and the production efficiency is low

If the cooling time is shortened, it is easy to cause problems such as incomplete thermal stress release of foamed ceramics and high defective rate.

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