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Device for preparing porous ceramic and method for preparing porous ceramic by using polystyrene foam particles

A technology of polystyrene foaming and porous ceramics, applied in the field of porous ceramics, can solve the problems of high price of polyurethane porous frame structure, increased production cost of porous ceramics, and high cost of porous ceramics products

Inactive Publication Date: 2020-07-10
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, the price of polyurethane porous frame structure is high, which leads to the problems of high cost and high price of porous ceramic products. In addition, a large amount of smoke will be generated during the process of roasting polyurethane porous frame, which requires special environmental protection equipment to reduce Hazard of smoke, which also increases the production cost of porous ceramics

Method used

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  • Device for preparing porous ceramic and method for preparing porous ceramic by using polystyrene foam particles
  • Device for preparing porous ceramic and method for preparing porous ceramic by using polystyrene foam particles
  • Device for preparing porous ceramic and method for preparing porous ceramic by using polystyrene foam particles

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preparation example Construction

[0031] The device for preparing porous ceramics provided by the present invention includes a foaming cylinder 1 with a lower opening. In the present invention, the material of the foaming cylinder 1 is preferably aluminum alloy, and the model of the aluminum alloy is preferably ZL104 aluminum alloy. The present invention has no special requirements on the internal shape and size of the foaming cylinder 1, and the corresponding internal shape and size can be designed according to the shape and size of the porous ceramic. In a specific embodiment of the present invention, the internal shape of the foaming cylinder 1 is preferably cylindrical, and the internal size is preferably Φ90×200 mm.

[0032] In the present invention, the foaming cylinder 1 is provided with an upper cover 3 , and the upper cover 3 is provided with a gas inlet 4 . In the present invention, the material of the upper cover 3 is preferably aluminum alloy, and the model of the aluminum alloy is preferably ZL10...

Embodiment 1

[0052] (a) Open the upper cover 3 of the foaming cylinder 1, put the polystyrene pre-expanded particles into the foaming cylinder 1, and carry out compaction; wherein, the specific volume of the pre-expanded particles is 18kg / m 3 , the particle size is 4-6mm, and the compaction degree after compaction is 75%;

[0053] (b) Close the upper cover 3 of the foaming cylinder 1, and take 2 m 3 The flow rate of / h is blown from the gas inlet 4 at a temperature of 115°C and a flow rate of 2m 3 / h of water vapor, the compacted polystyrene foamed particles are re-foamed for 2 h and the pressure is 0.1 MPa to obtain polystyrene foamed particles with a continuous porous structure;

[0054] (c) Add ceramic slurry to the ceramic slurry cylinder 2, push the pressurizing piston 5 inward with a pressure of 0.6 MPa, so that the ceramic slurry penetrates into the porous structure of the polystyrene foam particles, and the ceramic slurry is at room temperature After curing for 48 hours, a polyst...

Embodiment 2

[0058] (a) Open the upper cover 3 of the foaming cylinder 1, put the polystyrene pre-expanded particles into the foaming cylinder 1, and carry out compaction; wherein, the specific volume of the pre-expanded particles is 17kg / m 3 , the particle size is 5-7mm, and the compaction degree after compaction is 78%;

[0059] (b) Close the upper cover 3 of the foaming cylinder 1, and blow the gas from the gas inlet 4 at a temperature of 120°C and a flow rate of 2.5m 3 The compacted polystyrene foamed particles are re-foamed with air per hour, the time is 1.5h, the pressure is 0.3MPa, and the polystyrene foamed particles with porous structure are obtained;

[0060] (c) Add the ceramic slurry to the ceramic slurry cylinder 2, push the pressurizing piston 5 inward with a pressure of 1 MPa, so that the ceramic slurry penetrates into the porous structure of the polystyrene foam particles, and the ceramic slurry is cured at room temperature After 48 hours, a polystyrene foam particle-ceram...

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Abstract

The invention provides a device for preparing porous ceramic and a method for preparing porous ceramic by using polystyrene foam particles, and belongs to the technical field of porous ceramic. The device comprises a foaming cylinder body 1 with a lower opening and a ceramic slurry cylinder body 2 communicating with the foaming cylinder body 1 through a metal net 6, wherein the metal net 6 is arranged at the joint of the foaming cylinder body 1 and the ceramic slurry cylinder body 2, the foaming cylinder body 1 is provided with an upper cover 3, the upper cover 3 is provided with a gas inlet 4, and a pressurizing piston 5 is arranged at a lower opening of the ceramic slurry cylinder body 2. The device is simple in structure, the porous ceramic is prepared by using the polystyrene foam particles as a pore forming agent by using the structure, the cost is low, and the market competitiveness is high; the specific volume of the polystyrene foaming particles is low, and smoke pollution generated in the roasting process is small; and the porosity of the porous ceramic can be accurately controlled by adjusting the compactness of the polystyrene foamed particles and the introduction time of the foaming gas.

Description

technical field [0001] The invention relates to the technical field of porous ceramics, in particular to a device for preparing porous ceramics and a method for preparing porous ceramics with polystyrene foamed particles. Background technique [0002] Porous ceramic material is a material with high open pore diameter, high open porosity, high strength, high temperature resistance, high pressure, acid, alkali and organic medium corrosion resistance and good biological inertness, as well as long service life and good product regeneration performance. It is suitable for precision filtration and separation of various media, high-pressure gas exhaust silencing, gas distribution and electrolytic diaphragms, etc. [0003] At present, when preparing porous ceramics in China, the process used is to use a polyurethane porous frame structure, and to obtain porous ceramics by dipping ceramic slurry on it, and then calcining to remove the polyurethane after drying. In this process, the ...

Claims

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Application Information

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IPC IPC(8): B28B1/00B28B11/24B28B11/00C04B38/06B29C67/20B29C44/60B29C67/24
CPCB28B1/00B28B11/00B28B11/243B29C44/60B29C67/205B29C67/242C04B38/067
Inventor 张勇
Owner SHANDONG UNIV OF TECH
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