A hollow flat all-ceramic filter membrane element and its preparation method
A ceramic filter membrane and ceramic membrane technology, applied in the field of ceramic components, can solve problems such as shortening the service life, and achieve the effects of strong organic solvent resistance, high strength, and convenience for high-pressure backwashing
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Embodiment 1
[0046] The hollow flat ceramic filter element is a flat ceramic membrane made by coating a ceramic membrane liquid on a hollow flat ceramic membrane support body, using inorganic glue and ceramic plugs, and preparing and combining according to the following method steps:
[0047] Step 1, first make a hollow flat ceramic membrane support body according to the following sub-steps:
[0048] a. Weigh raw materials according to the following ratio: average particle size of 0.1-50μm, 94wt% alumina, 3wt% binder (such as tung oil) and 3wt% plasticizer (such as phthalate) Premix, then add 5wt% of premixed pore-forming agent (such as carbon powder) and 20wt% deionized water and mix evenly, then add 4wt% of premixed lubricant (such as metal soap calcium stearate ) mixed again, poured into a vacuum mud refining machine for mud refining, and then stale for 1-2 days to make mud segments,
[0049] b. Extrude the mud section into a green body with an extrusion molding machine,
[0050] c. D...
Embodiment 2
[0067] The hollow flat ceramic filter element is a flat ceramic membrane made by coating a ceramic membrane liquid on a hollow flat ceramic membrane support body, using inorganic glue and ceramic plugs, and preparing and combining according to the following method steps:
[0068] Step 1, first make a hollow flat ceramic membrane support body according to the following sub-steps:
[0069] a. Weigh raw materials according to the following ratio: average particle size of 0.1-50 μm, 97wt% alumina and silicon carbide mixture (50% each), 2wt% binder (such as methyl cellulose) and 1wt% Plasticizer (such as dioctyl adipate) is premixed, then add 4wt% pore forming agent (ammonium bicarbonate) and 15wt% deionized water to the premix and mix evenly, then add 6 wt% to the premix The lubricant (fatty acid soap) is mixed again, poured into the vacuum mud refining machine for mud refining, and then stale for 1-2 days to make mud segments.
[0070] b. Extrude the mud section into a green bod...
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