Method for preparing flash glazed wall tile

Abstract

The invention discloses a method for preparing a flash glazed wall tile. The flash glazed wall tile is prepared from the following roller kiln; the roller kiln is composed of a kiln chamber, combustion equipment, a ventilating device, and conveying equipment; the kiln chamber enters a brick outlet from a brick inlet, and orderly comprises a heating section and a cooling section; the heating section orderly comprises a preheating section, an oxidization section and a firing section; a vibrating cold air pipe is arranged above a tile conveying surface of the preheating section; a blow hole is formed on the cold air pipe; and the air outlet direction of the blow hole tipsily blows downwards at 30-60 degrees. Crystals of glisten glaze are obtained by furnace transmutation of kiln waste gas; the waste is changed into a valuable resource; the problem that the kiln waste gas pollutes the environment is solved; the cost of treatment of the kiln waste gas is reduced; the method is simple to operate and easy to control; and the prepared flash glazed wall tile is stable in performance and unique in effect.

Description

technical field [0001] The invention relates to a method for preparing flashing glazed tiles, in particular to a tunnel kiln with a cold air duct in a preheating section, and a method for preparing flashing glazed tiles by using the tunnel kiln, belonging to the field of building materials. Background technique [0002] Ceramic tiles are plate-shaped or block-shaped ceramic products produced by clay and other inorganic non-metallic raw materials through molding and sintering processes. They are used to decorate and protect buildings, walls and floors of buildings. [0003] The method of firing ordinary clay ceramic products in a tunnel kiln can be divided into several processes: (1) remove residual moisture in the preheating section at 20-200°C; Water; (3) In the preheating section at 500-600°C, the quartz crystal form transforms; (4) At the stage of 600-1050°C, it belongs to the oxidation stage; (5) At 1050-1200°C, it is the reduction stage of the product entering the firin...

AI Technical Summary

Problems solved by technology

[0009] However, at present, the flash decoration of tiles needs to use lithographic flash powder, which is very rigid and uniform, and the labor intensity of workers is also high, and the material consumption is also high.

When ceramic tiles decorated with flash powder are calcined at high temperature in a kiln, the flash powder is very unstable and sensitive to the atmosphere of the kiln, causing some flash powder to be bright and some not bright, making production control difficult

As for the flash powder itself, because it contains rare metal elements (such as Ce) to flash, its price is relatively high, its manufacture is difficult, and its use and manufacture consumes a lot of resources.

And the existing flash powder is generally embossed flash, can not melt flash

[0010] In the process of kiln production, a lot of energy needs to be consumed, because most of the ceramic raw materials contain sulfur elements, such as pyrite (FeS 2 ), iron sulfate, calcium sulfate, sodium sulfate, etc., in the firing process, easily lead to the generation of sulfur dioxide and sulfur trioxide, SO 2 Gas not only pollutes the environment and destroys ecology, but also directly affects the production quality of products and corrodes production equipment

The treatment of kiln exhaust gas leads to an increase in production costs. If it is not handled properly, it will easily cause serious environmental pollution

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