Modified fly ash support body, modification method of fly ash support body, fly ash ceramic membrane preparation method and application thereof
A technology of fly ash and support body is applied in the field of ceramic membrane to achieve the effect of high porosity
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[0023] Wherein, the preparation method of the fly ash support includes: mixing the composition for preparing the fly ash support with water, molding, and then roasting;
[0024] Wherein, the composition for preparing the fly ash support includes the first fly ash, the first organic molding agent and the first plasticizer, so that the total weight of the composition for preparing the fly ash support is Standard, the content of the first fly ash is 85-97% by weight, the content of the first organic molding agent is 0.9-7% by weight, and the content of the first plasticizer is 1.6-9% by weight;
[0025] Wherein, the first fly ash contains component M, and the component M is selected from TiO 2 , CaO and MgO, and based on the total weight of fly ash, the content of component M is 1-8% by weight.
[0026] In the present invention, based on the total weight of the solution containing the polysaccharide matrix and / or derivatives thereof, the content of the polysaccharide matrix and / ...
Embodiment approach
[0034] According to a preferred embodiment of the present invention, based on the total weight of the composition, the content of the first fly ash is 87-95% by weight, the content of the first organic molding agent is 2-6% by weight, the first plasticizer The content of the agent is 2-7% by weight.
[0035] According to a more preferred embodiment of the present invention, based on the total weight of the composition, the content of the first fly ash is 89-93% by weight, the content of the first organic molding agent is 3-5% by weight, and the first increase The content of the plasticizer is 3-6% by weight.
[0036] In the present invention, there is no need to add inorganic forming agents in the composition, such as kaolinite, illite, montmorillonite, vermiculite, sepiolite, etc., and in the present invention, there is no need to add pore-forming agents in the composition. Agents, such as commonly used carbon black, starch powder, calcium carbonate, polystyrene particles. ...
Embodiment 1
[0094] (1) The composition (wherein the composition of the first fly ash is as shown in S1 in Table 1, and the amount of each component in the composition is as shown in Table 2) for producing the fly ash support body is carried out with water Mixing, the weight ratio of the composition to water is 1:0.2 to obtain the mixed raw material;
[0095] Wherein, the spherical particle content in the fly ash in the composition is 70%, the organic molding agent is methyl cellulose, and the plasticizer is glycerol;
[0096] (2) After aging the mixed raw material obtained in step (1) at 25°C for 36 hours, perform mechanical vacuum slime refining to obtain a wet mud mud section, and then put the wet mud mud section into an extruder for extrusion molding to obtain Tubular body, the inner diameter is 4mm, the outer diameter is 30mm, the number of channels is 19, the same below;
[0097] (3) Dry the green body obtained in step (2) at 120°C for 4 hours, then raise the temperature to 1400°C a...
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Abstract
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