Natural wollastonite is an energy-saving mineral raw material that can reduce the firing temperature and accelerate the firing cycle. However, because of the shortage of natural wollastonite resources, the number of applications in glazed tile production is very limited.
In June 2003, a Russian research institute used artificial limestone waste, silica sand, and other raw materials to synthesize artificial wollastonite at 1,200°C, which was used successfully for the second quick burn glazed tile. According to the mineral identification analysis, the main zirconium phase crystals of the fired glazed bricks are α-wollastonite, feldspar and cassiterite. In the experiment, 30% to 50% of synthetic wollastonite, 35% to 45% of clay, and 15% to 25% of other raw material ingredients were fired at 1050° C. and 960 to 970° C. to make a glazed tile. The stroke is 0.9 to 1.4, the water absorption is 13.5 to 15.5, and the flexural strength is 13 to 15 MPa.
In June 2003, a Russian research institute used artificial limestone waste, silica sand, and other raw materials to synthesize artificial wollastonite at 1,200°C, which was used successfully for the second quick burn glazed tile. According to the mineral identification analysis, the main zirconium phase crystals of the fired glazed bricks are α-wollastonite, feldspar and cassiterite. In the experiment, 30% to 50% of synthetic wollastonite, 35% to 45% of clay, and 15% to 25% of other raw material ingredients were fired at 1050° C. and 960 to 970° C. to make a glazed tile. The stroke is 0.9 to 1.4, the water absorption is 13.5 to 15.5, and the flexural strength is 13 to 15 MPa.
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