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Ceramic foam filter, composition for preparing ceramic foam filter and preparation method for ceramic foam filter

A technology of foam ceramics and compositions, applied in chemical instruments and methods, ceramic products, filtration and separation, etc., can solve the problems of high cost of foam ceramic filters for cast iron, inability to filter copper liquid, waste of resources, etc., and achieve good filtration and adsorption, small heat capacity and large filtration capacity

Inactive Publication Date: 2012-07-11
JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a ceramic foam filter and its composition and preparation method to solve the problem that the ceramic foam filter for cast aluminum in the prior art cannot filter copper liquid, and the ceramic foam filter for cast iron is too expensive to manufacture and cause waste of resources

Method used

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  • Ceramic foam filter, composition for preparing ceramic foam filter and preparation method for ceramic foam filter

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preparation example Construction

[0030] The present invention also provides a method for preparing a ceramic foam filter, comprising the following steps: preparation of slurry: weighing the above-mentioned composition and mixing to obtain slurry; preparation of green body: adding the slurry to a carrier of predetermined size, Forming the body; drying and sintering: drying the body, sintering, and cooling to obtain the ceramic foam filter. Among them, the carrier usually chooses polyurethane foam with a predetermined pore size.

[0031] Preferably, in the drying and sintering steps of the above preparation method, the drying temperature is 100-200°C, and the drying time is 0.5-1 hour. ℃, and kept at this temperature for 0.5 to 1.5 hours, and cooled to obtain the ceramic foam filter.

[0032] In this method, by using suitable temperature and suitable materials, not only the energy consumption is reduced, but also more energy-saving; and the prepared ceramic foam filter has good high-temperature impact and ther...

Embodiment 1

[0038] Composition: 25% alumina, 60% silicon carbide, 14.5% silica sol.

[0039] Surfactant: 0.5% polyvinyl alcohol and 0.05% defoamer by total weight of the composition.

[0040] crafting process:

[0041] Slurry preparation: according to the composition of Example 1 in Table 1, the raw materials were added into the mixer, and mixed at high speed for 0.5-1 hour to make a uniform slurry, and a surfactant was added to the slurry at the same time.

[0042] Green body preparation: Cut the soft polyurethane foam with a pore size of 10PPI into a size of 100cm*100cm*22cm, as the carrier of the ceramic slurry, add the slurry to the foam sponge by rolling and dipping the slurry, and then input the carrier into automatic molding In the machine, extrude excess slurry to complete the preparation of green body.

[0043] Drying: Put the obtained body into a drying oven at 100°C for 0.5 hours to harden.

[0044] Sintering: Put the dried green body into a high-temperature sintering furnac...

Embodiment 2

[0047] Composition: Burnt Gemstone and Kyanite 85%, Silicon Carbide 10%, Aluminum Dihydrogen Phosphate and Aluminum Sulphate 5%.

[0048] Surfactant: 0.1% methylcellulose by total weight of the composition

[0049] crafting process:

[0050] Slurry preparation: according to the composition of Example 2 in Table 1, add the raw materials into the mixer and mix at high speed for 0.5 to 1 hour to make a uniform slurry. In order to ensure the thixotropy of the slurry, add the slurry 0.1% methylcellulose by weight.

[0051] Green body preparation: Cut the soft polyurethane foam with a pore size of 10PPI into a size of 50cm*50cm*22cm, as the carrier of the ceramic slurry, add the slurry to the foam sponge by rolling and dipping the slurry, and then input the carrier into automatic molding In the machine, extrude excess slurry to complete the production of green body.

[0052] Drying: Put the obtained body into a drying oven at 150°C for 1 hour to harden.

[0053] Sintering: Put t...

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Abstract

The invention provides a ceramic foam filter, a composition for preparing the ceramic foam filter and a preparation method for the ceramic foam filter. The composition consists of the following components in percentage by weight: 25 to 85 percent of salic material, 10 to 60 percent of silicon carbide and 5 to 15 percent of inorganic binder or organic binder. The preparation method comprises the following steps of: preparing slurry by using the composition, preparing a green body, and drying and sintering to obtain the ceramic foam filter. The composition for preparing the ceramic foam filter does not contain metal chromium, cannot pollute the environment and jeopardize human health, and is safer and more environment-friendly.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a foam ceramic filter, a composition and a preparation method thereof. Background technique [0002] At present, in the smelting and pouring process of various metals, the casting reject rate can be as high as 60-80% due to the defects of non-metallic inclusions and pores. Casting defects not only seriously affect the casting performance and mechanical properties of castings, but also affect the Subsequent processing and appearance also have detrimental effects. In this regard, generally through the filtration and purification of molten metal, various non-metallic inclusions and gases can be effectively reduced, and high-quality castings can be obtained. At present, fiber filter screens, straight hole filter screens, and foam ceramic filter screens are generally used to filter and purify molten metal. [0003] With the development of technology, ceramic foam filters have excell...

Claims

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Application Information

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IPC IPC(8): C04B38/00B01D39/20
Inventor 唐一林祝建勋刘敬浩
Owner JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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