Making process of porous ceraimc filter element

A technology of porous ceramics and manufacturing methods, which is applied in the direction of ceramic products, separation methods, chemical instruments and methods, etc., can solve the problems of high manufacturing cost, low sintering yield, and long calcination time of ceramic filter elements for water purifiers. The effect of large pore size penetration, low firing temperature and simplified formula

Inactive Publication Date: 2004-11-24
广东省枫溪陶瓷工业研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the prior art, due to complex formula, long calcination time or low sinterin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Take 66kg of quartz powder, 8kg of frit and 26kg of rice noodles, add 43kg of water and 0.8kg of 50% (weight) water glass solution, and mill in a ball mill for about 16 hours. After ball milling, the fineness of the slurry is controlled to be over The sieve residue after 320 mesh sieve is less than 0.5%. The slurry removes air bubbles in a vacuum, is grouted into a plaster mold to form a green body, and dried in the sun. Place the blank in an atmospheric sintering furnace. The temperature of the furnace is increased at a rate of 1.3°C / min to 200°C, then at a rate of 2°C / min to 600°C, and then at a rate of 0.8°C / min. Up to 700°C. The furnace is heated by anoxic dry distillation method before 700℃. After 700℃, preheated air is introduced into the furnace to burn the combustible materials in the furnace. At the same time, the temperature is controlled to increase to 1020℃ at a rate of 1.8℃ / min. , Keep it at 1020℃ for 1 hour, then cool it down, and then process it in...

Embodiment 2

[0019] Example 2: Take 65kg of medical stone powder, 6kg of frit, 20kg of rice flour and 9kg of corn flour, add 45kg of water and 0.4kg of 40% (weight) Na 2 CO 3 The solution is ball milled in a ball mill for about 14 hours, and the fineness of the slurry after ball milling is controlled to be less than 0.5% after passing through a 320 mesh sieve. Put the slurry in a vacuum to remove air bubbles, grouting in a plaster mold to make a green body, and then dry. Place the blank in an atmospheric sintering furnace. The temperature of the furnace is increased at a rate of 1.6°C / min to 200°C, then at a rate of 2.3°C / min to 600°C, and then at a rate of 0.7°C / min. Up to 700°C. The furnace heats the blanks by anoxic dry distillation before 700°C. After 700°C, preheated air is introduced into the furnace to burn the combustible substances in the blanks. At the same time, the temperature is controlled to increase to 1100°C at a rate of 2°C / min. , Keep it at 1100°C for 1 hour, then cool it, an...

Embodiment 3

[0020] Example 3: Ingredient composition: 64kg of alumina powder, 10kg of frit, 20kg of flour and 6kg of corn flour, add 60kg of water, and mill in a ball mill for about 14 hours. After ball milling, the fineness of the slurry is controlled after passing through a 320 mesh sieve. Less than 0.5%. The slurry is placed in a vacuum to remove bubbles, filtered and dehydrated, dried to a moisture content of about 12% (weight), granulated by a roller mill, punched and formed in a hydraulic press steel mold to make a blank, and dried in the sun. Place the blank in an atmospheric sintering furnace. The temperature of the furnace is increased at a rate of 1.2°C / min to 200°C, then at a rate of 2°C / min to 600°C, and then at a rate of 0.9°C / min. Up to 700°C. The furnace is heated by anoxic dry distillation method before 700℃. After 700℃, preheated air is introduced into the furnace to burn the combustible materials in the furnace. At the same time, the temperature is controlled and the tempera...

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PUM

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Abstract

The present invention is making process of porous ceramic filter element with added pore creating agent. The making process includes the following steps: compounding material comprising base body material, fused block and grain starch; ball milling while adding water, vacuum defoaming, forming biscuit, drying biscuit, and baking in temperature control mode, with the baking step including first anoxic baking and then oxidizing baking. The present invention adopts grain starch as pore creating agent and adhesive, can make product with complicated shape via injecting slurry or punching, and has high product size precision, low sintering temperature, high product quality and low cost.

Description

Technical field [0001] The invention relates to a method for manufacturing porous ceramic products, and more particularly to a method for manufacturing a porous ceramic filter element of a water purifier by adding a pore former. Background technique [0002] The process of adding pore formers to manufacture porous ceramics is to add pore formers to the ceramic ingredients, use the pore formers to occupy a certain space in the green body, and then through sintering, the pore formers vaporize or oxidize and leave the matrix to become pores to obtain porous ceramics. The ingredients are generally composed of quartz, alumina powder, cordierite, silicon carbide, etc. as the matrix material, the eutectic composition composed of feldspar, clay, etc. as the binder, and activated carbon, sawdust, etc. as the pore-forming agent. A certain amount of binder is needed to make the material easy to shape. [0003] Porous ceramics are widely used in various fields as filtration, separation, soun...

Claims

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Application Information

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IPC IPC(8): B01D39/20C04B35/14C04B38/06
Inventor 邱伟志陈史民
Owner 广东省枫溪陶瓷工业研究所
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