Sludge microcrystalline glass and its preparation method
A technology for glass-ceramic and sludge, which is applied to the field of sludge glass-ceramic and its preparation, can solve the problems of increasing the total production cost of glass-ceramic products and the high cost of raw materials, thereby simplifying the batching operation process, reducing the cost of raw materials, and reducing the batching cost. The effect of simple operation process
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Embodiment 1
[0020] Raw material ratio: calcined sludge 60.0 parts; limestone 16.3 parts; dolomite 18.0 parts; gypsum 5.0 parts; antimony trioxide 0.7 parts.
[0021] Weigh the raw materials according to the ratio of raw materials, mix them evenly, put them into the crucible, melt them at 1500°C for 2 hours, then lower them to 1400°C for 0.5 hours to obtain molten glass; pour them into molds, form them into glass plates, and Anneal at 600°C for 2 hours; then transfer to the trolley furnace, hold at 770°C for 1 hour for nucleation, then raise the temperature to 1000°C, hold for 2 hours for crystallization, then lower the temperature to 600°C, hold for 2 hours for heat preservation and annealing, and then make The original plate of the sludge glass-ceramic is obtained; the original plate of the sludge glass-ceramic is cut, polished, and polished to obtain a finished product of the sludge glass-ceramic.
Embodiment 2
[0023] The pretreatment and chemical composition of the sludge are the same as in Example 1.
[0024] Raw material ratio: calcined sludge 65.0 parts; limestone 18.0 parts; dolomite 16.0 parts; antimony trioxide 1.0 parts.
[0025] Concrete process and process parameter are with embodiment 1.
Embodiment 3
[0027] The pretreatment and chemical composition of the sludge are the same as in Example 1.
[0028] Raw material ratio: calcined sludge 70.0 parts; limestone 20.0 parts; dolomite 9.0 parts; antimony trioxide 1.0 parts.
[0029] Weigh the raw materials according to the ratio of raw materials, mix them evenly, put them into the crucible, melt them at 1550°C for 2 hours, and then lower them to 1420°C for 0.5 hours to obtain molten glass; pour them into molds and form them into glass plates. Anneal at 650°C for 2 hours; then transfer to the trolley furnace, heat-preserve and nucleate at 780°C for 1 hour, then raise the temperature to 1020°C, heat-preserve and crystallize for 3 hours, then lower the temperature to 650°C, heat-preserve and anneal for 2 hours, and make it after cooling Obtain the original plate of sludge glass-ceramic; cut, grind and polish the original plate to obtain the finished product of sludge glass-ceramic.
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