Method for manufacturing microcrystalline glass by cyanite tailing
A technology for kyanite tailings and glass-ceramics, which is applied in the field of building material synthesis to achieve the effects of low cost and energy consumption, high utilization rate of tailings, and pollution reduction.
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[0027] Example 1:
[0028] Within the composition range of various chemical substances that can form glass-ceramics designed by the present invention, it is selected according to the mass fraction of ingredients: the tailings after pretreatment are 64.6%, Al 2 O 3 10.0﹪,CaO 16.2﹪,Na 2 CO 3 3.0﹪,TiO 2 1.2﹪, BaO 2.4%, ZnO 2.6%. After mixing uniformly, melt at a high temperature of 1200℃, quench the molten slurry in water, collect the quenched small particle frit, after drying, pulverize with a ball mill to 200 mesh, add 2% of polyvinyl alcohol, proceed Granulation. Then use the corresponding mold to press into the desired shape under a pressure of 20 MPa, and perform heat treatment at a heating rate of 4° C. / min. Select the heat treatment system of nucleating at 800°C for 2 hours, heating to 920°C for crystallization for 2 hours, and natural annealing to obtain glass-ceramics. figure 2 It is an SEM image corresponding to 5500 times magnification.
Example Embodiment
[0029] Example 2:
[0030] Selected according to the mass fraction of the ingredients: the tailings after pretreatment is 70.3%, Al 2 O 3 6.3﹪,CaO 15.2﹪,Na 2 CO 3 2.0﹪,TiO 2 1.0﹪,P 2 O 5 0.3%, BaO 2.3%, ZnO 2.6%. After mixing uniformly, melt it at a high temperature of 1300℃, quench the molten slurry in water, collect the quenched small particle frit, after drying, pulverize with a ball mill to 200 mesh, add 1% of polyvinyl alcohol, and proceed Granulation. Then use the corresponding mold to press it into the desired shape under a pressure of 40 MPa, and perform heat treatment at a heating rate of 3° C. / min. Select a heat treatment system of 810°C for nucleation for 2 hours, heating to 940°C for 2 hours of crystallization, and natural annealing to obtain glass-ceramics.
Example Embodiment
[0031] Example 3:
[0032] Selected according to the mass fraction of ingredients: tailings after pretreatment 55.5%, Al 2 O 3 8.7﹪,CaO 22.0﹪,Na 2 CO 3 5.2﹪,Cr 2 O 3 1.6%, BaO 3.3%, ZnO 3.7%. After mixing uniformly, melt it at a high temperature of 1400℃, quench the molten slurry in water, collect the quenched small particle frit, after drying, pulverize it to 200 mesh with a ball mill, add 2.2% polyvinyl alcohol, proceed Granulation. Then use the corresponding mold to press into the desired shape under a pressure of 80 MPa, and perform heat treatment at a heating rate of 3° C. / min. Select a heat treatment system of nucleating at 800°C for 3 hours, heating to 915°C for crystallization for 3 hours, and natural annealing to obtain glass-ceramics.
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