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The developer has proved through experiments that the casting water slag is in a glass state after quenching at a high temperature, and when reheating the heating reaction, it is easy to recrystallize. Since it has such a characteristic, it is used as a ceramic composition to generate a heating phenomenon when it is sintered, and rapidly and uniformly promotes the sintering. In particular, the water-containing slag having a lower CaO/SiO2 value is uniform in glass quality and has a better heat generation effect. At the same time, it proves that alkali metal is used. The aqueous hydroxide solution is modified to make the surface of the water slag active, and the uniform crystallization of the water slag and the good crystallization reaction with the clay complex are more effectively promoted, and the wollastonite-silicon-rich kaolinite solid crystal is formed by sintering.
In the product test, the water slag treated with alkali hydroxide is used as the main raw material, and the clay is mixed with other auxiliary agents to prepare the blank, form, dry and glaze, and the flexural strength is rapidly burned at 1130-1200°C. The enamel wall tiles are 2 to 4 times taller, and the brittleness resistance has been greatly improved. The wall tiles are flexible. A set of tests showed that 50% of water slag, 40% of clay, and 10% of dolomite powder treated with 4% aqueous sodium hydroxide solution were molded into 5×30×60 cm samples, dried, glazing, and fed into a gas-fired roller kiln. , Sintered at 1150°C at a heating rate of 3 to 5°C/min. The flexural strength of the fired test brick was 540 kg/cm2, the elastic modulus was 5 kg/cm2 x 105, and the water absorption was 3%.
Using casting slag to produce high-strength wall and floor tiles
In August 2003, Japan used metallurgical slag to produce super-high-strength wall tiles. In Japan, the metallurgical industry discharges a large amount of casting water slag each year, and the utilization rate is far inferior to blast furnace slag. In order to make full use of casting slag, Japan has conducted in-depth research on its production of wall tiles.