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Preparation method for andesite porous filter ceramic for filtration

A technology for filtering ceramics and andesite, applied in the field of porous ceramic materials

Inactive Publication Date: 2012-07-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current application of andesite is limited to the protection of the nuclear industry, the preparation materials for strong acid-resistant equipment, etc., and the application in health care is limited to powder additives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: First, take andesite and ball-mill it into a powder body of 100 mesh to 500 mesh; secondly, add andesite powder quality 5% binder polyvinyl alcohol and 10% pore-forming agent starch to the andesite powder, Use the mold to press the billet on the hot press, the pressing pressure is 8MPa, the pressing temperature is 130°C, and the hot pressing time is 30min; finally, put the hot-pressed billet into the sintering furnace from room temperature with a temperature increase of 4°C / min Raise the temperature to the decomposition temperature of the pore-forming agent, and keep it at the decomposition temperature of the pore-forming agent for 60 minutes, then raise the temperature to 1000°C at a heating rate of 10°C / min, keep it at this temperature for 180 minutes, and then cool it to room temperature with the furnace to obtain the filter material. Andesite porous filter ceramics.

[0014] Andesite of the present invention contains 58-65% SiO by mass percentage 2 , ...

Embodiment 2

[0015] Example 2: First, take andesite and ball-mill it into a powder of 100 mesh to 500 mesh; secondly, add 8% of the mass of the andesite powder to the andesite powder as a binder bioglass and 15% of the pore-forming agent dextrin , use the mold to press the billet on the hot press, the pressing pressure is 12MPa, the pressing temperature is 100°C, and the hot pressing time is 25min; finally, put the hot-pressed billet into the sintering furnace from room temperature at 5°C / min The heating rate is raised to the decomposition temperature of the pore-forming agent, and kept at the decomposition temperature of the pore-forming agent for 80 minutes, and then the temperature is raised to 1000°C at a heating rate of 8°C / min, and kept at this temperature for 160 minutes, then cooled to room temperature with the furnace to be filtered Porous filter ceramics with andesite.

Embodiment 3

[0016] Example 3: First, take andesite and ball mill it into a powder of 100 mesh to 500 mesh; secondly, add 10% of the mass of the andesite powder to the andesite powder and 5% of the pore-forming agent carbon acid salt, using a mold to press and form a billet on a hot press, the pressing pressure is 15MPa, the pressing temperature is 80°C, and the hot pressing time is 20min; finally, the hot-pressed billet is put into a sintering furnace from room temperature to 6°C / The heating rate of min is raised to the decomposition temperature of the pore-forming agent, and the temperature is kept at the decomposition temperature of the pore-forming agent for 90 minutes, and then the temperature is raised to 1200°C at a heating rate of 9°C / min, and the temperature is kept at this temperature for 150 minutes, and then cooled to room temperature with the furnace Obtain andesite porous filter ceramics for filtration.

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Abstract

The invention relates to a preparation method for andesite porous filter ceramic for filtration, which comprises the following steps: taking andesite powder, mixing the andesite powder with binder and pore-forming material, using a die and forming on a hot press to obtain a blank, finally putting the hot-pressed blank in a sintering furnace, increasing temperature to decompose the pore-forming material, and cooling with the furnace to room temperature after high-temperature sintering to obtain the andesite porous filter ceramic for filtration. The invention uses andesite as a raw material forpreparing the porous filter ceramic. The prepared porous ceramic fully reflects the advantages of strong acid resistance, strong alkaline resistance, high temperature resistance, high corrosion resistance and the like of the andesite, has healthcare function on human bodies and can be widely in the filtration field, especially food filtration and steelmaking filtration.

Description

technical field [0001] The invention belongs to the field of porous ceramic materials, and in particular relates to a preparation method of andesite porous filter ceramics for filtering. Background technique [0002] Porous ceramics, as a ceramic functional material with the gas phase as the main phase, are widely used in various fields such as metallurgy, chemical industry, environmental protection, energy, food, pharmaceuticals, and biology because of their excellent performance. Heat, chemical fillers, bioceramics and catalyst supports and other materials. At present, the materials used to prepare porous ceramics for filtration mainly include wollastonite, diatomaceous earth, mullite, corundum and corundum materials, magnesium aluminum spinel and other materials, and the preparation methods mainly include adding pore-forming agent method and foaming method. , Organic foam impregnation method, sol-gel method, hydrothermal-hot static pressing method, etc. In industrial ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/20C04B38/06
Inventor 杨立军党新安张昌松袁越锦
Owner SHAANXI UNIV OF SCI & TECH
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