Preparation method for andesite porous filter ceramic for filtration
A technology for filtering ceramics and andesite, applied in the field of porous ceramic materials
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Embodiment 1
[0013] Embodiment 1: First, take andesite and ball-mill it into a powder body of 100 mesh to 500 mesh; secondly, add andesite powder quality 5% binder polyvinyl alcohol and 10% pore-forming agent starch to the andesite powder, Use the mold to press the billet on the hot press, the pressing pressure is 8MPa, the pressing temperature is 130°C, and the hot pressing time is 30min; finally, put the hot-pressed billet into the sintering furnace from room temperature with a temperature increase of 4°C / min Raise the temperature to the decomposition temperature of the pore-forming agent, and keep it at the decomposition temperature of the pore-forming agent for 60 minutes, then raise the temperature to 1000°C at a heating rate of 10°C / min, keep it at this temperature for 180 minutes, and then cool it to room temperature with the furnace to obtain the filter material. Andesite porous filter ceramics.
[0014] Andesite of the present invention contains 58-65% SiO by mass percentage 2 , ...
Embodiment 2
[0015] Example 2: First, take andesite and ball-mill it into a powder of 100 mesh to 500 mesh; secondly, add 8% of the mass of the andesite powder to the andesite powder as a binder bioglass and 15% of the pore-forming agent dextrin , use the mold to press the billet on the hot press, the pressing pressure is 12MPa, the pressing temperature is 100°C, and the hot pressing time is 25min; finally, put the hot-pressed billet into the sintering furnace from room temperature at 5°C / min The heating rate is raised to the decomposition temperature of the pore-forming agent, and kept at the decomposition temperature of the pore-forming agent for 80 minutes, and then the temperature is raised to 1000°C at a heating rate of 8°C / min, and kept at this temperature for 160 minutes, then cooled to room temperature with the furnace to be filtered Porous filter ceramics with andesite.
Embodiment 3
[0016] Example 3: First, take andesite and ball mill it into a powder of 100 mesh to 500 mesh; secondly, add 10% of the mass of the andesite powder to the andesite powder and 5% of the pore-forming agent carbon acid salt, using a mold to press and form a billet on a hot press, the pressing pressure is 15MPa, the pressing temperature is 80°C, and the hot pressing time is 20min; finally, the hot-pressed billet is put into a sintering furnace from room temperature to 6°C / The heating rate of min is raised to the decomposition temperature of the pore-forming agent, and the temperature is kept at the decomposition temperature of the pore-forming agent for 90 minutes, and then the temperature is raised to 1200°C at a heating rate of 9°C / min, and the temperature is kept at this temperature for 150 minutes, and then cooled to room temperature with the furnace Obtain andesite porous filter ceramics for filtration.
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