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Rapid production technology of porous ceramic

A technology of porous ceramics and preparation process, applied in the field of ceramics, can solve the problems of poor adhesion of mud, long holding time, troublesome needle change, etc. Effect

Inactive Publication Date: 2017-12-19
九江汇泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, if the water content of the mud is too low, the die-casting will be semi-dry die-casting, the fluidity of the mud is poor, and it is easy to bond with the mold. During the demoulding process, the needle is prone to bending and breaking, and it is troublesome to change the needle. , at the same time, the bonding of the mud is not good, and the pressure holding time is longer during the pressing process
If the water content of the mud is high and the fluidity is enhanced, the mud will adhere to the pinholes of the mold. When the attached mud accumulates to a certain extent, the compression molding effect will be poor, and the failure rate and scrap rate of the finished product will be poor. It will increase again, so in this case, every time about 300 pieces are pressed, the mold needs to be cleaned regularly and reinstalled, which is very troublesome
[0003] At the same time, in the traditional ceramic production process, paraffin wax is often used as lubricant, which is easy to cause pollution to the environment when fired at high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The invention discloses a rapid preparation process of porous ceramics, comprising the following steps:

[0040] A rapid preparation process for porous ceramics, characterized in that it comprises the following steps:

[0041] a. Cordierite powder, black mud powder, coal powder, biomass powder, hydroxypropyl methylcellulose, stearic acid are crushed into powder respectively, and passed through a 30-mesh sieve;

[0042] b. Hot-melt the lubricant for use;

[0043] c. After mixing the materials obtained in the first two steps with water, enter the kneader and knead for 0.2 hours; the kneader is for kneading, kneading , the ideal equipment, after the kneading of the kneader, the material is fully mixed and stirred in the kneader, and the stirring paddle in the kneader can make the kneaded material be quickly sheared, so that the material is mixed evenly;

[0044] d. Put the kneaded mixture into the vacuum mud refining machine and knead twice; the vacuum mud refining machi...

Embodiment 2

[0055] The similarities with Example 1 will not be described in detail, and the difference is that in this example, its raw material composition is:

[0056] 60 parts of cordierite powder, 8 parts of black mud powder, 16 parts of coal powder; 20 parts of biomass powder, in this embodiment, corn stalks are used as raw materials to make biomass powder, 1 part of hydroxypropyl methylcellulose, 13 parts of lubricant, 2 parts of stearic acid 1801; 25 parts of water. The lubricant of the present embodiment contains 4 parts of kerosene, 5 parts of tallow, and 4 parts of tung oil. The particle size of each powder is 50 mesh.

[0057] Knead in a kneader for 1 hour.

[0058] Mix three times in a vacuum mud mixer.

[0059] The stale time after mixing is 24 hours.

[0060] During the firing process after demolding the mud, when the temperature rises to 200°C, control the heating rate at 50°C / hour until the temperature rises to 600°C, then continue to heat up to 950°C, keep the tempera...

Embodiment 3

[0063] The similarities with Example 1 will not be described in detail, and the difference is that in this example, its raw material composition is:

[0064] 75 parts of cordierite powder, 10 parts of black mud powder, 20 parts of pulverized coal; 30 parts of biomass powder, in the present embodiment, use hay mill as raw material to make biomass powder, 3 parts of hydroxypropyl methylcellulose , 20 parts of lubricant, 2.5 parts of stearic acid 1801; 25 parts of water. The lubricant of the present embodiment contains 6 parts of kerosene, 8 parts of tallow, and 6 parts of tung oil. The particle size of each powder is 100 mesh.

[0065]Knead in a kneader for 2 hours.

[0066] Mix three times in a vacuum mud mixer.

[0067] The stale time after mixing is 36 hours.

[0068] During the firing process after demolding the mud, when the temperature rises to 210°C, control the heating rate at 80°C / hour until the temperature rises to 600°C, then continue to heat up to 1000°C, hold fo...

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Abstract

The invention relates to the technical field of ceramics, and especially relates to a rapid production technology of porous ceramic. The technology comprises the following steps: 1, respectively breaking cordierite powder, black clay powder, coal dust, biomass powder, hydroxypropyl methylcellulose and stearic acid to form powders, and sieving the the powders; 2, carrying out hot melting on a lubricant for later use; 3, adding water to materials obtained in step 1 and step 2, mixing the materials with the water, and kneading the obtained mixture in a kneader for 0.2-2 h; 4, mixing the kneaded mixture in a vacuum mixer two or more times; 5, ageing the mixed mud for 12-36 h; 6, sending the aged mud into a die, and molding the aged mud; and 7, demolding the molded mud, sintering the molded mud, and cooling the sintered mud to obtain the porous ceramic plate. The kneading and mixing processes are arranged in the rapid production technology of the porous ceramic, and the mixed mud is aged, then is sent into the die and undergoes compression molding, so the production efficiency is greatly improved; and the production efficiency of the porous ceramic plate produced through the technology is near ten times higher than the production efficiency of traditional technologies.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a rapid preparation process of porous ceramics. Background technique [0002] In ceramic products, especially ceramic plates, hot die casting is usually used in the process of pressing the raw materials in the mold, and it takes more than 30 seconds for one die casting. At the same time, if the water content of the mud is too low, the die-casting will be semi-dry die-casting, the fluidity of the mud is poor, and it is easy to bond with the mold. During the demoulding process, the needle is prone to bending and breaking, and it is troublesome to change the needle. , At the same time, the bonding of the mud is not good, and the pressure holding time is longer during the pressing process. If the water content of the mud is high and the fluidity is enhanced, the mud will adhere to the pinholes of the mold. When the attached mud accumulates to a certain extent, the compression moldi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B38/06
CPCC04B33/13C04B33/1305C04B38/068C04B2235/5463C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/96C04B38/0665
Inventor 成贵华李洁峰
Owner 九江汇泰科技有限公司
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