Preparation method for hollow ceramic ball with openings

A ceramic ball and hollow technology, which is applied in the field of preparation of hollow open-pore ceramic balls, can solve the problems of large bulk density, poor scale capacity, and small porosity, and achieve small bulk density, reduce bed pressure drop, and porosity big effect

Inactive Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with pure solid ceramic balls, these novel-designed ceramic balls have been greatly improved, but still have the shortcomings of large bulk density, small porosity, and poor dirt-holding capacity.

Method used

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  • Preparation method for hollow ceramic ball with openings
  • Preparation method for hollow ceramic ball with openings
  • Preparation method for hollow ceramic ball with openings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] exist figure 1 Among them, the open-hole hollow ceramic ball is made of china clay, spherical activated carbon with a diameter of 14mm is used as a hollow agent, covered with 3mm thick porcelain clay, pressed into a spherical shape in a mold, and dried to form a porcelain embryo. Use a suitable tool to make round holes on the porcelain embryo. The diameter of the holes is 3 mm, and the number of holes is 10. The holes are evenly distributed on the spherical surface. Put the open-pored ceramic embryo into the roasting furnace, and gradually raise the temperature to 750°C under the introduction of air, so that the charcoal is converted into carbon dioxide and formed into a hollow ball. Continue to raise the temperature to 1400°C, sinter the hollow balls, then slowly cool down to 300°C, and accelerate cooling to room temperature to make hollow open-pore ceramic balls.

Embodiment 2

[0029] exist figure 2 Among them, the open-hole hollow ceramic ball is made of china clay, and spherical activated carbon with a diameter of 10 mm is used as a hollow agent, wrapped with 3 mm thick porcelain clay, pressed into a spherical shape in a mold, and dried to form a porcelain embryo. Use a special tool to open square holes on the porcelain embryo. The side length of the holes is 3mm, the number of holes is 10, and the holes are evenly distributed on the spherical surface. Put the open-pored ceramic embryo into the roasting furnace, and gradually raise the temperature to 600 ° C under the air, so that the charcoal is converted into carbon dioxide and formed into a hollow ball. Continue to raise the temperature to 1500°C, sinter the hollow balls, then slowly cool down to 300°C, and accelerate cooling to room temperature to make hollow open-pore ceramic balls.

Embodiment 3

[0031] exist image 3 Among them, the open-hole hollow ceramic ball is made of china clay, spherical activated carbon with a diameter of 5mm is used as a hollow agent, covered with 1mm thick porcelain clay, pressed into a spherical shape in a mold, and dried to form a porcelain embryo. Use a suitable tool to make triangular holes on the porcelain embryo. The side length of the holes is 1mm, the number of holes is 6, and the holes are evenly distributed on the spherical surface. Put the porous ceramic embryo into the roasting furnace, and gradually raise the temperature to 700°C under the air, so that the charcoal is converted into carbon dioxide and formed into a hollow ball. Continue to heat up to 1600°C, sinter the hollow balls, then slowly cool down to 400°C, and accelerate cooling to room temperature to make hollow open-pore ceramic balls.

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Abstract

The invention discloses a preparation method for a hollow ceramic ball with openings. According to the invention, china clay is used as a raw material, spherical active carbon is added as a hollowing agent, a ceramic green body is prepared from the china clay by using a common process and is perforated with a plurality of through holes, the shape and the amount of the through holes depend on demands, then the ceramic green body is sintered at a high temperature, and the active carbon hollowing agent is removed so as to obtain the hollow ceramic ball with openings. The preparation method is simple; the prepared hollow ceramic ball has the advantages of good permeability, great porosity, a small weight and the like; when filled into the top of a reactor, the hollow ceramic balls can accommodate considerable sediment in the reactor, thereby effectively overcoming the problem of great pressure drop in the reactor, prolonging an operation cycle of an apparatus and producing obvious economic benefits.

Description

technical field [0001] The invention relates to a method for preparing hollow ceramic balls with holes. Background technique [0002] In the field of petrochemical industry, ceramic balls are widely used as a kind of filler for reactors. It has good mechanical strength, acid and alkali resistance and corrosion resistance, and can improve the redispersibility of materials in the reactor, reduce the flow resistance, and further Improve the filtration effect of gas and liquid, but its specific gravity is large and the pores are small, so impurities can only be accommodated by accumulation gaps. When oil deposits block the gaps, the pressure drop of the reactor increases, and the device must be shut down for processing. [0003] In order to improve the fouling capacity of ceramic balls, a lot of improvement work has been done on the shape of ceramic balls in this field, such as the honeycomb open-hole ceramic ball proposed by CN201053000Y, the solid open-hole ceramic ball propos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B33/00
Inventor 张会成孙万付耿敬远刘淑琴
Owner CHINA PETROLEUM & CHEM CORP
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