Production method of alumina multichannel ceramic membrane support

A ceramic membrane support, multi-channel technology, used in ceramic products, chemical instruments and methods, ceramic molding machines, etc., can solve the problem of poor flexural strength and acid and alkali corrosion resistance, unsatisfactory ceramic membrane filtration effect, and low production yield. and other problems, to achieve the effect of maintaining particle morphology, reducing uneven drying, and increasing content

Inactive Publication Date: 2016-12-21
山东华瓷环保设备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ceramic membranes produced in the prior art and industrial manufacturing have poor flexural strength and acid and alkali corrosion resistance, and the production yield is low, and the filtering effect of the ceramic membranes is unsatisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] The preparation method of a kind of alumina multi-channel ceramic membrane support described in the invention comprises the following steps:

[0046] (1) Prepare raw materials for alumina multi-channel support;

[0047] (2) Making the alumina multi-channel support material into mud, including the following steps:

[0048] Add the solid powder into the high-speed mixer, and mix the materials evenly at high speed;

[0049] Mix the liquid raw materials into an emulsion for later use;

[0050] Evenly add the mixed emulsion into the high-speed mixer and mix with the solid powder, and perform high-speed kneading until it becomes a high-plastic mud;

[0051] Put the mixed mud into a closed container, store it in a space with constant temperature and humidity for 48-72 hours, and fully homogenize the mud to ensure uniformity;

[0052] (3) The aluminum oxide multi-channel ceramic membrane support is extruded to form a green body, and the following process steps are adopted...

Embodiment 1

[0085] The preparation method of Example 1: Knead the pre-mixed powder and the prepared liquid raw materials in a kneader, refine the mud in a mud mill to make regular mud, and then put it into an aging room to age for 48 hours. Finally, use an extruder to extrude the stale mud into shape, the extrusion pressure is 8-10MPa, the extrusion speed is 1-2m / min, and the extrusion temperature is 25°C. The extruded plastic green body was placed on a porous wedge-shaped wooden tray to dry naturally, and then dried in a microwave oven for 10 minutes. The dried product enters the kiln for sintering, the sintering temperature is 1550°C, and it is kept for 4 hours to make an alumina multi-channel ceramic membrane.

[0086] The porosity of the product obtained according to Example 1 is 38.5%, the average pore diameter is 3 μm, the strength is 69.4MPa, and the water flux is 3m 3 / h·m 2 .

Embodiment 2

[0088] The preparation method of Example 2: Knead the pre-mixed powder and the prepared liquid raw materials in a kneader, refine the mud in a mud mill to make regular mud, and then put it into an aging room for 52 hours. Finally, use an extruder to extrude the stale mud into shape, the extrusion pressure is 5-6MPa, the extrusion speed is 1.5-2m / min, and the extrusion temperature is 25°C. The extruded plastic green body was placed on a porous wedge-shaped wooden tray to dry naturally, and then dried in a microwave oven for 20 minutes. The dried product enters the kiln for sintering, the sintering temperature is 1650°C, and the temperature is kept for 8 hours to make an alumina multi-channel ceramic membrane.

[0089] The porosity of the product obtained according to Example 2 is 39.5%, the average pore diameter is 5 μm, the strength is 61.4MPa, and the water flux is 3.6m 3 / h·m 2 .

[0090] (3) In Example 3, the amount of liquid raw material added is 12% by weight of the ...

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Abstract

A production method of an alumina multichannel ceramic membrane support belongs to the technical field of multichannel ceramic membranes. The production method of the alumina multichannel ceramic membrane support comprises the following steps: carrying out a plastic extrusion molding technology on alumina adopted as a main raw material, drying the molded material in a natural drying and microwave drying combination mode, and sintering the dried material in a shuttle kiln or a tunnel kiln. Rare earth oxide, nanometer alumina sol and a sintering aid are mixed, so the flexural strength and the acid and alkali corrosion resistance of the above obtained product are improved; introduction of an organic binder in the production process of an alumina multichannel ceramic membrane greatly reduces deformation of a green body in the extruding, drying and sintering processes and improves the yield of the product; and the nanometer alumina sol has high intergranular binding strength, so the granule morphology is kept, thereby the channels of the produced product are smooth and have small filtering resistance, and the water flux is improved by 20% or above.

Description

technical field [0001] The invention belongs to the technical field of multi-channel ceramic membranes, and in particular relates to a preparation method of an alumina multi-channel ceramic membrane support body. Background technique [0002] Ceramic membranes, also known as inorganic ceramic membranes, are asymmetric membranes prepared from inorganic ceramic materials through special processes. The ceramic membrane tube wall is densely covered with micropores. Under the action of pressure, the raw material liquid flows in the membrane tube or outside the membrane, small molecular substances (or liquid) pass through the membrane, and macromolecular substances (or solids) are intercepted by the membrane, so as to achieve separation, concentration, Purification and environmental protection purposes. Ceramic membrane has the advantages of high separation efficiency and stable effect. It has been successfully applied in many fields such as food, beverage, plant (drug) deep proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/10C04B35/622C04B35/636C04B35/634B28B1/00B28C1/00B28C1/04B28B3/20B28B11/24B28B11/14
CPCC04B38/068B28B1/00B28B3/20B28B11/14B28B11/241B28B11/243B28C1/006B28C1/04C04B35/10C04B35/622C04B35/63416C04B35/63444C04B35/6365C04B38/0645C04B38/0675C04B2235/3208C04B2235/321C04B2235/3218C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/3472C04B2235/349C04B2235/60C04B2235/606C04B2235/96C04B38/0074C04B38/0054
Inventor 巩玉贤徐立根
Owner 山东华瓷环保设备科技有限公司
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