Ceramic water purification filter element and preparation method thereof
A technology of water purification filter element and ceramics, which is applied in the field of water purification filter element, can solve the problems of low mechanical strength of filter element, unusable filter element, poor combination of raw materials, etc., and achieve the effect of fast filtration speed, developed porosity and high mechanical strength
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[0037] The preparation method of modified diatomite is as follows:
[0038] (1) Get 50g of diatomaceous earth and add it to 500mL with a concentration of 15% H 2 SO 4 immersion at 80°C for 3 hours;
[0039] (2) After the precipitate was collected by filtration, it was dried and calcined at 500°C for 3 hours;
[0040] (3) Add the calcined diatomaceous earth to the aluminum sulfate solution and soak for 24 hours;
[0041] (4) Dry at 110°C to obtain modified diatomite.
[0042] The preparation method of modified attapulgite is as follows:
[0043] (1) After pulverizing the attapulgite, add it to water, stir for 30 minutes, and soak for 8 hours;
[0044] (2) After filtering and drying, add attapulgite into sulfuric acid with a concentration of 9.8%, and soak for 2 hours;
[0045] (3) Add saturated sodium hydroxide to the pH of 5.8 in step (2), and stir for 2h;
[0046] (4) After filtering, dry at 110°C for 2 hours to obtain modified attapulgite.
[0047] The preparation meth...
Embodiment 1
[0053] (1) Pour the following raw materials into the ball mill according to the mass ratio: 50 parts of modified diatomite, 40 parts of modified attapulgite, 10 parts of modified clay, 10 parts of molecular sieve powder, 10 parts of aluminum oxide, nano-zinc oxide 10 parts, 5 parts of pore-forming agent, 5 parts of PEG, total 500Kg, add 1000kg of water, ball mill for 2 hours;
[0054] (2) Add 7 parts of bentonite, CaCO 3 3 parts, 1 part of polyvinyl alcohol, and 3 parts of defoaming agent were added into the ball mill barrel, and ball milling was continued for 10 hours to obtain ceramic puree;
[0055] (3) Sieve the ceramic raw slurry obtained in step (2), and after the fineness reaches 250 mesh sieve ≤ 1%, press grouting to the gypsum mold to obtain a molded green body; if the fineness is less than 250 mesh sieve ≤ 1%, continue ball milling for 1 hour, and re-test the fineness until the 250-mesh sieve remains ≤ 1%, then press grouting to the gypsum mold to obtain a molded gr...
Embodiment 2
[0059] (1) Pour the following raw materials into the ball mill according to the mass ratio: 65 parts of modified diatomite, 50 parts of modified attapulgite, 20 parts of modified clay, 20 parts of molecular sieve powder, 15 parts of aluminum oxide, nano-zinc oxide 15 parts, 5 parts of pore-forming agent, 5 parts of PEG, total 500Kg, add 1000kg of water, ball mill for 2 hours;
[0060] (2) Add 5 parts of polyquaternium salt, Na 2 CO 3 4 parts, 2 parts of polyvinyl alcohol, and 3 parts of defoamer were added into the barrel of the ball mill, and ball milling was continued for 10 hours to obtain the ceramic puree;
[0061] (3) Sieve the ceramic raw slurry obtained in step (2), and after the fineness reaches 250 mesh sieve ≤ 1%, press grouting to the gypsum mold to obtain a molded green body; if the fineness is less than 250 mesh sieve ≤ 1%, continue ball milling for 1 hour, and re-test the fineness until the 250-mesh sieve remains ≤ 1%, then press grouting to the gypsum mold t...
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