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Filter plate of porous ceramic covered by Nano ceramic membrane filter, and fabricating method

A technology of nano ceramics and porous ceramics, which is applied in the field of porous ceramic filter plates, the manufacture of porous ceramic filter plates, and the field of pulp dehydration and filtration. Achieve the effects of not being easy to clog, widening the field of use and prolonging the service life

Inactive Publication Date: 2007-12-26
江苏省陶瓷研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a filter medium, the micropores of the ceramic filter plate of the ceramic filter will be blocked during use. There are many factors that cause the blockage of the ceramic filter plate. The process enters the filter channel of the ceramic membrane, which causes the filter capacity of the ceramic filter plate to drop significantly.
[0003] In order to prevent the filter capacity of the ceramic filter plate from weakening, the ceramic filter will periodically clean it chemically and ultrasonically to restore it to a higher level of filtration. However, this cleaning is not thorough, and there will still be a small amount of material remaining , so with the accumulation of blockages, the ceramic plate will be completely blocked and scrapped
[0004] The existing ceramic filter plates all use micron-scale ceramic filter membranes, and the fine particles in the pulp can easily enter the pores of the ceramic membranes, thereby causing the above-mentioned clogging process. On the one hand, it will seriously affect the service life of the ceramic filter plates. The average service life is about one year
On the other hand, the field of use of ceramic plates is limited. For some pulps with fine particle size, micron-sized ceramic membranes cannot be applied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, a kind of porous ceramic filter plate covered with nano-ceramic filter membrane, the surface of ceramic substrate is coated with nano-ceramic filter membrane, and this nano-ceramic filter membrane is made of 100 parts of deionized water, 1 part of analytical pure aluminum isopropoxide , 4 parts of nano-alumina powder, 0.3 part of chemically pure 10% HNO 3 Composition, the specific manufacturing method is:

[0034] 1. Preparation of nano ceramic filter membrane:

[0035] (1) Preparation of aluminum sol:

[0036] a. Hydrolysis of aluminum salt: heat deionized water to 80-90°C, add aluminum isopropoxide at constant temperature, stir magnetically for more than 1.5 hours, then stand still, and slowly form a precipitate;

[0037] b. Peptization: heat up to 85-95°C, after volatilizing isopropanol, add 10% HNO at constant temperature 3 The solution acts as a peptizer to redisperse the precipitate;

[0038] c. Reflux aging: pour the solution into the reflux dev...

Embodiment 2

[0048] Embodiment 2, a porous ceramic filter plate covered with a nano-ceramic filter membrane, the surface of the ceramic substrate is coated with a nano-ceramic filter membrane, the nano-ceramic filter membrane is composed of 100 parts of deionized water and 2 parts of analytically pure aluminum isopropoxide. , 2 parts of nano alumina powder, 0.5 parts of chemically pure 10% HNO 3 , 0.1 part of PVA, the specific manufacturing method is the same as that of Example 1, wherein after the nano-film gel is prepared, add PVA solution, ultrasonically disperse for more than 2h, and then stir with a magnetic stirrer for more than 2h, and then enter the coating process.

Embodiment 3

[0049] Embodiment 3, a porous ceramic filter plate covered with a nano-ceramic filter membrane, the surface of the ceramic substrate is coated with a nano-ceramic filter membrane, the nano-ceramic filter membrane is composed of 100 parts of deionized water, 3 parts of analytically pure aluminum isopropoxide. , 3 parts of nano alumina powder, 0.1 part of chemically pure 10% HNO 3 , 0.15 part of PVA is composed, and the specific manufacturing method is the same as that in Example 2.

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Abstract

This invention discloses a porous ceramic filtration plate coated with nanoscale ceramic filtration film for liquid-solid separation. The nanoscale ceramic filtration film is prepared by: hydrolyzing aluminum isopropoxide, preparing a sol with HNO3, refluxing, aging to form aluminum sol, adding Al2O3 nanopowder, mixing, dispersing to form uniform nanoscale film gel, uniformly coating onto the surface of a substrate by Czochralski method, drying and sintering. The obtained porous ceramic filtration plate can effectively block the majority of fine particles in ore slurry, and has such advantages as no blockage, long service life and wide applications.

Description

technical field [0001] The invention belongs to the field of solid-liquid separation, and relates to a porous ceramic filter plate, in particular to a porous ceramic filter plate coated with a nano-ceramic filter membrane on the surface, which is especially suitable for dehydration and filtration of ore pulp. At the same time, this porous ceramic filter plate is provided manufacturing method. Background technique [0002] As a filter medium, the micropores of the ceramic filter plate of the ceramic filter will be blocked during use. There are many factors that cause the blockage of the ceramic filter plate. The process enters the filter channel of the ceramic membrane, which causes the filter capacity of the ceramic filter plate to drop significantly. [0003] In order to prevent the filter capacity of the ceramic filter plate from weakening, the ceramic filter will periodically clean it chemically and ultrasonically to restore it to a higher level of filtration. However, t...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/10
Inventor 罗益军蒋建平邱永斌王跃超
Owner 江苏省陶瓷研究所有限公司
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