Preparation method of large-size thin-wall hollow flat-plate ceramic film
A large-size, ceramic membrane technology, applied in the field of ceramic membranes, can solve the problems of poor acid and alkali corrosion resistance, no effective control measures, high raw material costs, etc., to achieve good acid and alkali corrosion resistance, smooth pores, filter resistance, chemical The effect of high composition purity
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Embodiment 1
[0052] The proportioning composition of the flat film of the present invention is as follows: the particle size is 2 μm α-Al 2 o 3 Powder, starch, carboxymethyl cellulose with the ratio of 80wt%: 10wt%: 10wt%, the total mass of solid raw materials is 100kg; Ratio, the total mass of liquid raw materials is 25kg.
[0053]The above two raw materials, solid and liquid, are mixed in a weight ratio of 4:1.
[0054] Preparation method: mix the pre-mixed powder and liquid raw materials, knead in a kneader, refine the mud in a mud mill to make porous ceramic molding mud, and age for 24 hours. Put the stale mud into a hydraulic extruder and extrude it. The extrusion pressure is 6MPa, the extrusion speed is 3m / min, and the extrusion temperature is 25°C. The outgoing direction is at an included angle of 45°. The extruded plastic green body was placed on a perforated flat plate covered with fiber felt, and dried in a microwave oven for 1 hour. The dried semi-finished products are stac...
Embodiment 2
[0058] The dosing composition of the flat film of the present invention is as follows: solid raw material: a particle size of 20 μm α-Al 2 o 3 The ratio of powder, charcoal, and dextrin is 90wt%: 5wt%: 5wt%, the total mass of solid raw materials is 120kg; the ratio of liquid raw materials: water, oleic acid, and nano-silica dispersion is 80wt%: 15wt%: 5wt %, the total mass of liquid raw materials is 20kg.
[0059] The above two raw materials, solid and liquid, are mixed in a weight ratio of 6:1.
[0060] Preparation method: mix the pre-mixed powder and liquid raw materials, knead them in a kneader, refine the mud in a mud mill to make porous ceramic plastic mud, and age for 30 hours. Put the stale mud into the hydraulic extruder and extrude it. The extrusion pressure is 5MPa, the extrusion speed is 2m / min, and the extrusion temperature is 25°C. The outgoing direction is at an included angle of 30°. The extruded plastic green body was placed on a porous flat plate covered w...
Embodiment 3
[0064] The dosing composition of the flat film of the present invention is as follows: a particle size of 100 μm α-Al 2 o 3 Powder, activated carbon, and hydroxypropyl cellulose have a weight ratio of 85wt%: 7wt%: 8wt%, and the total mass of solid raw materials is 100kg; Weight ratio, the total mass of liquid raw materials is 20kg.
[0065] The above two raw materials, solid and liquid, are mixed in a weight ratio of 5:1.
[0066] Preparation method: mix the pre-mixed powder and liquid raw materials, knead them in a kneader, refine the mud in a mud mill to make porous ceramic plastic mud, and age for 48 hours. Put the stale mud into a hydraulic extruder and extrude it. The extrusion pressure is 4MPa, the extrusion speed is 1.5m / min, and the extrusion temperature is 25°C. The direction of extrusion is at an angle of 10°. The extruded plastic green body was placed on a perforated flat plate covered with fiber felt, and dried in a microwave oven for 1 hour. The dried semi-fi...
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