Hollow plate ceramic filter membrane and preparation method thereof

A technology for a ceramic filter membrane and a ceramic membrane support body is applied in the field of porous ceramic materials, which can solve the problems of low strength and easy breakage, and achieve the effects of reducing the cost of raw materials, reducing the amount of water added, and improving the flexural strength

Active Publication Date: 2022-03-04
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of the hollow flat ceramic filter membrane, due to its low strength, it is easy to break during the application process.

Method used

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  • Hollow plate ceramic filter membrane and preparation method thereof
  • Hollow plate ceramic filter membrane and preparation method thereof
  • Hollow plate ceramic filter membrane and preparation method thereof

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preparation example Construction

[0035] The present invention at first provides the preparation method of hollow flat ceramic filter membrane, comprises the following steps:

[0036] a. Preparation of hollow flat ceramic support body:

[0037] (1) Raw materials: the main raw material is thermal conductivity Al 2 o 3 Ball defective products, alumina content ≥ 99%, particle size < 0.044mm;

[0038] The flux is a mixture composed of limestone powder, magnesite powder, and ferrosilicon ash powder: among them, the calcium carbonate content in limestone powder is ≥99%, the particle size is <0.088mm, and the magnesium carbonate content in magnesite is ≥99%, Particle size < 0.088mm, silicon dioxide content in ferrosilicon ash powder ≥ 98%, particle size < 0.044mm;

[0039] The phase change enhancer is zircon sand powder, in which ZrO 2 Content ≥ 55%, particle size < 0.088mm;

[0040] The sintering agent is a composite of titanium dioxide powder and copper oxide powder, in which TiO 2 Content ≥ 99%, particle siz...

Embodiment 1

[0074] (1) Preparation of ceramic membrane support

[0075] Accurately weigh each raw material according to the ratio in Table 1. First pour the powdered raw materials into the forced mixer, dry mix for 10 minutes, add water and wet mix for 8 minutes, pour the mud into the mud for 30 minutes, and finally put the mud into a sealed tank Stale for 24 hours. It is prepared by extrusion molding method, processed according to the designed hollow plate size and installed with an extrusion mold, extruded at room temperature, the molding pressure is 40MPa, and cut into the required size according to the user's requirements. The cut body is first dried naturally at room temperature for 24 hours, and then sent to the tunnel drying kiln for drying. The maximum drying temperature of the tunnel drying kiln is controlled at 300 ° C, and the drying time is controlled at 8 hours. The dried semi-finished hollow flat ceramic membrane support is fired in a shuttle kiln, the firing temperature i...

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Abstract

The invention belongs to the field of porous ceramic materials, and particularly relates to a hollow plate ceramic filter membrane and a preparation method thereof. The technical problem to be solved by the invention is to provide the hollow plate ceramic filter membrane and the preparation method thereof. The filtering membrane is prepared by the following steps: taking heat-conducting Al2O3 ball defective products as main raw materials, and then supplementing specific fluxing agents, phase change reinforcing agents, sintering agents, pore forming agents, binding agents, plasticizers and expanding agents, performing extrusion molding, drying and sintering to obtain a hollow flat plate ceramic membrane support body; and then dipping into dipping slurry consisting of alpha-alumina powder, limestone powder, magnesite powder, ferrosilicon ash powder, zircon sand powder, titanium dioxide powder, copper oxide powder, cellulose, Guangxi white mud, paper pulp waste liquid and an expanding agent, taking out and firing, thereby obtaining the product. Waste resources are fully utilized, the raw material cost is greatly reduced, and the prepared hollow plate ceramic filter membrane can be widely applied to liquid-solid separation in the industries of industrial and domestic wastewater treatment, brewing, chemical engineering, medicine and the like.

Description

technical field [0001] The invention belongs to the field of porous ceramic materials, and in particular relates to a hollow flat ceramic filter membrane and a preparation method thereof. Background technique [0002] The separation performance of porous ceramic membranes is closely related to the pore size and distribution, porosity, pore shape and other microstructures of the material. The pore size of the porous ceramic membrane can be adjusted from a few nanometers to tens of microns. Compared with porous ceramics, porous ceramic membranes have an asymmetric structure and have higher separation performance. The thickness of the membrane generally ranges from tens of nanometers to hundreds of microns, which can be used for nanometer-scale sieving (such as the high rejection rate of multivalent ions by nanofiltration membranes) to the separation of visible large particles (such as high-temperature gas dust removal), It has a wide range of application fields. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B38/02C04B38/00C04B35/10C04B35/622C04B35/64B01D67/00B01D69/10B01D71/02
CPCC04B38/02C04B38/068C04B38/0645C04B38/0054C04B35/10C04B35/62218C04B35/64C04B35/622B01D69/105B01D71/025B01D67/0039C04B2235/96C04B2235/442C04B2235/3427C04B2235/3232C04B2235/3281Y02P40/60
Inventor 李亮
Owner PANZHIHUA UNIV
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