Production method of alumina multichannel ceramic membrane support
A ceramic membrane support, multi-channel technology, used in ceramic products, chemical instruments and methods, ceramic molding machines, etc., can solve the problem of poor flexural strength and acid and alkali corrosion resistance, unsatisfactory ceramic membrane filtration effect, and low production yield. and other problems, to achieve the effect of maintaining particle morphology, reducing uneven drying, and increasing content
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preparation example Construction
[0045] The preparation method of a kind of alumina multi-channel ceramic membrane support described in the invention comprises the following steps:
[0046] (1) Prepare raw materials for alumina multi-channel support;
[0047] (2) Making the alumina multi-channel support material into mud, including the following steps:
[0048] Add the solid powder into the high-speed mixer, and mix the materials evenly at high speed;
[0049] Mix the liquid raw materials into an emulsion for later use;
[0050] Evenly add the mixed emulsion into the high-speed mixer and mix with the solid powder, and perform high-speed kneading until it becomes a high-plastic mud;
[0051] Put the mixed mud into a closed container, store it in a space with constant temperature and humidity for 48-72 hours, and fully homogenize the mud to ensure uniformity;
[0052] (3) The aluminum oxide multi-channel ceramic membrane support is extruded to form a green body, and the following process steps are adopted...
Embodiment 1
[0085] The preparation method of Example 1: Knead the pre-mixed powder and the prepared liquid raw materials in a kneader, refine the mud in a mud mill to make regular mud, and then put it into an aging room to age for 48 hours. Finally, use an extruder to extrude the stale mud into shape, the extrusion pressure is 8-10MPa, the extrusion speed is 1-2m / min, and the extrusion temperature is 25°C. The extruded plastic green body was placed on a porous wedge-shaped wooden tray to dry naturally, and then dried in a microwave oven for 10 minutes. The dried product enters the kiln for sintering, the sintering temperature is 1550°C, and it is kept for 4 hours to make an alumina multi-channel ceramic membrane.
[0086] The porosity of the product obtained according to Example 1 is 38.5%, the average pore diameter is 3 μm, the strength is 69.4MPa, and the water flux is 3m 3 / h·m 2 .
Embodiment 2
[0088] The preparation method of Example 2: Knead the pre-mixed powder and the prepared liquid raw materials in a kneader, refine the mud in a mud mill to make regular mud, and then put it into an aging room for 52 hours. Finally, use an extruder to extrude the stale mud into shape, the extrusion pressure is 5-6MPa, the extrusion speed is 1.5-2m / min, and the extrusion temperature is 25°C. The extruded plastic green body was placed on a porous wedge-shaped wooden tray to dry naturally, and then dried in a microwave oven for 20 minutes. The dried product enters the kiln for sintering, the sintering temperature is 1650°C, and the temperature is kept for 8 hours to make an alumina multi-channel ceramic membrane.
[0089] The porosity of the product obtained according to Example 2 is 39.5%, the average pore diameter is 5 μm, the strength is 61.4MPa, and the water flux is 3.6m 3 / h·m 2 .
[0090] (3) In Example 3, the amount of liquid raw material added is 12% by weight of the ...
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