Super white polished bricks

Abstract

This invention discloses a method for preparing super-white polished bricks. The method comprises: (1) pulverizing super-white sand powder (containing 28-31% of MgO) 55-75 wt.%, feldspar 10-20 wt.%, and clay 10-30 wt.% into powder; (2) molding; (3) sintering; (4) polishing. The obtained super-white polished bricks contain no environmental-pollutive brightener, and have such advantages as high whiteness (higher than 75 degrees), good quality and no pollution.

Description

Technical field: [0001] The invention relates to a polished tile. Background technique: [0002] The ultra-white bricks on the existing market are generally made by using the traditional K2O-AL2O3-SiO2 binary system structure, and then adding a certain amount of zirconium silicate. The whiteness is generally around 60 degrees, and the texture is not enough. To the texture effect of natural stone. Invention content: [0003] The object of the present invention is to provide an environmentally friendly ultra-white polished brick without adding brightener, high whiteness (more than 75 degrees whiteness), good texture like natural stone. [0004] The present invention is achieved in this way. It is mainly made of ultra-white stone powder, feldspar, and clay with an MgO content of 28-31% through powder manufacturing, green body molding, high-temperature firing, and polishing. The weight content of ultra-white stone powder is more than 55%-75%, the weight content ratio of feld...

AI Technical Summary

Problems solved by technology

Since the firing range of the formula with high MgO content is relatively narrow, deformation and pinhole defects are prone to occur during the firing process. Therefore, an appropriate amount of feldspar is introduced into the formula to make the formula sintered in advance at a temperature much lower than the eutectic temperature. , to help expand the sintering range, thereby effectively controlling deformation and pinholes, and can be fired according to the output of ordinary bricks