Porcelain tile preparation method

Abstract

The invention discloses a porcelain tile preparation method. The porcelain tile preparation method comprises steps as follows: step one, sludge is pretreated to obtain a finished sludge product with the Fe content smaller than 0.5%, the Ti content smaller than 0.3% and Mn content smaller than 0.1%; step two, 15%-35% of the sludge treated in the step one, 60%-80% of feldspar and 0.1%-10% of an additive are mixed to obtain a mixed material; step three, the mixed material is subjected to compression molding and sintering to obtain a finished product. With the adoption of the porcelain tile preparation method, resources are saved, sludge waste is recycled, and further, the prepared porcelain tile has the advantages of high whiteness, high breaking strength, low water absorption and the like.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a preparation method of porcelain tiles. Background technique [0002] my country's construction industry has a huge demand for porcelain tiles. Most conventional porcelain tiles require clay-like plastic raw materials. The formula is: clay 15-25%, feldspar 60-70%, and additives 3-10%. Porcelain brick mud plastic materials (clay) are obtained from fertile fields and river and river alluvial planes. It is necessary to remove the surface silt of the farmland and take away the middle layer of black mud. After the black mud is mined, the farmland can no longer be cultivated. Resource destruction is enormous. [0003] On the other hand, the output of sludge from urban sewage treatment plants is very large. Although there are ways of reuse, such as: agricultural composting, processing fertilizers, etc., due to the high content of heavy metals in it, it is easy to be absorbe...

AI Technical Summary

Problems solved by technology

Porcelain brick mud plastic materials (clay) are obtained from fertile fields and river and river alluvial planes. It is necessary to remove the surface silt of the farmland and take away the middle layer of black mud. After the black mud is mined, the farmland can no longer be cultivated. resource destruction

[0003] On the other hand, the output of sludge from urban sewage treatment plants is very large. Although there are ways of reuse, such as: agricultural composting, processing fertilizers, etc., due to the high content of heavy metals in it, it is easy to be absorbed by plants and re-enter the human body, which is harmful to health. Therefore, landfilling is still adopted in most areas at present, but landfilling requires a large amount of land, and the land after landfilling cannot be cultivated due to the high content of heavy metals in the sludge.

[0004] At present, sludge is also used as a raw material for porcelain tiles, but the quality of the products is low. The routine quality inspection items of porcelain tile products: whiteness, flexural strength, water absorption, etc., are not up to the existing products. index requirements

Specifically, the existing technology is to add sludge and other mud and sand raw materials to the ball mill, and then remove iron after ball milling into a slurry, so the iron removal is not complete, and other heavy metals such as titanium manganese cannot be added for recycling, resulting in the whitening of the finished product. very low

In addition, due to the presence of mud, ball milling is inefficient and consumes more electricity

Furthermore, the existing sludge generally has a high calcium content and is difficult to sinter. After firing, the porosity of the finished brick is high, which leads to a relatively high water absorption rate of the fired product (the water absorption rate is about 0.5%). The strength is relatively low (the flexural strength is only about 1400N)

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