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Micro-crystallized porous ceramic plate and preparation method thereof

A technology of porous ceramic plates and microcrystals is applied in the field of porous ceramic production, which can solve the problem of high production cost of porous ceramics, and achieve the effects of being beneficial to treatment and comprehensive utilization, wide application range and low raw material cost.

Active Publication Date: 2021-04-20
辽宁罕王环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high production cost of existing porous ceramics, the present invention provides a microcrystallized porous ceramic plate and its preparation method. The method uses high-calcium slag from iron works and diatomite as main raw materials, and undergoes two foaming processes. , sintered at high temperature and produce wollastonite crystal phase, so as to obtain microcrystalline porous ceramic plate with high open porosity, high strength and wide application range

Method used

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  • Micro-crystallized porous ceramic plate and preparation method thereof
  • Micro-crystallized porous ceramic plate and preparation method thereof
  • Micro-crystallized porous ceramic plate and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0024] A method for preparing a microcrystalline porous ceramic plate, comprising the following steps:

[0025] 1. Take the following mass percentages of 30% high-calcium slag from iron works, 50% diatomite, 10% kaolin, 7% calcite, 1% silicon carbide, 1% zinc oxide, and 1% barium carbonate, and mix the above raw materials Prepare mud by wet ball milling;

[0026] 2. The mud is spray-dried at 600°C into powder;

[0027] 3. Add the above powder into a refractory mold made of mullite-cordierite plate, and then put the mold into a tunnel kiln for high-temperature sintering. The sintering process is to raise the temperature to 950°C at a heating rate of 10°C / min, and keep it warm For 30 minutes, the calcium carbonate in the calcite foamed, and then the temperature was raised to 1140°C at a heating rate of 3°C / min, and the silicon carbide was foamed, and the temperature was kept constant for 1 hour. Cool down to room temperature at a cooling rate of 20°C / min to prepare a microcrys...

Embodiment 2

[0032] A method for preparing a microcrystalline porous ceramic plate, comprising the following steps:

[0033] 1. Take the following mass percentages of 25% high-calcium slag from iron works, 55% diatomite, 10% kaolin, 6.3% limestone, 1.2% silicon carbide, 1.3% zinc oxide, and 1.2% barium carbonate. Mix the above raw materials Perform wet ball milling to make slurry;

[0034] 2. The mud is then spray-dried at 600°C into powder;

[0035] 3. Add the above powder into a refractory mold made of mullite-cordierite plate, and then put the mold into a tunnel kiln for high-temperature sintering. The sintering process is to raise the temperature to 980°C at a heating rate of 15°C / min, and keep it warm 25min, then raise the temperature to 1130°C at a heating rate of 5°C / min and keep the temperature for 40 minutes, and then cool down to room temperature at a cooling rate of 30°C / min. A microcrystalline porous ceramic blank with a compressive strength of 70% and a compressive strength ...

Embodiment 3

[0040] A method for preparing a microcrystalline porous ceramic plate, comprising the following steps:

[0041] 1. Take the following mass percentages of 20% high-calcium slag from iron works, 60% diatomite, 5.5% kaolin, 10% limestone, 1.5% silicon carbide, 1.5% zinc oxide, and 1.5% barium carbonate. Mix the above raw materials Perform wet ball milling to make slurry;

[0042] 2. The mud is spray-dried at 600°C into powder;

[0043] 3. Add the above powder into a refractory mold made of mullite-cordierite plate, and then put the mold into a tunnel kiln for high-temperature sintering. The sintering process is to raise the temperature to 1000°C at a heating rate of 20°C / min, and keep it warm 20min, then raise the temperature to 1150°C at a heating rate of 1°C / min and keep the temperature constant for 30 minutes, then cool down to room temperature at a cooling rate of 30°C / min to obtain a thickness of 200mm, a bulk density of 180kg / cubic, a water absorption rate of 400%, and por...

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Abstract

The invention relates to a micro-crystallized porous ceramic plate and a preparation method thereof, and belongs to the technical field of porous ceramic production. According to the micro-crystallized porous ceramic plate and preparation method thereof of the invention, iron plant high-calcium water granulated slag and diatomite are used as main raw materials, and a product with low production cost, high open porosity, high strength and wide application range is obtained through twice foaming and high-temperature sintering. The preparation method of the micro-crystallized porous ceramic plate comprises the following steps of: 1) mixing raw materials, and carrying out wet ball milling to prepare slurry; (2) drying the slurry into powder; (3) adding the powder into a fire-resistant mold, and putting the mold into a tunnel kiln for sintering the mold to prepare a micro-crystallized porous ceramic blank; and (4) carrying out dry-method abrasive cutting on the micro-crystallized porous ceramic blank to obtain a plate with holes distributed all over the surface.

Description

technical field [0001] The invention relates to a microcrystallized porous ceramic plate and a preparation method thereof, belonging to the technical field of porous ceramic production. Background technique [0002] Microcrystalline glass ceramics is a kind of polycrystalline solid material containing a large number of microcrystalline phases and glass phases, which is produced by controlling crystallization during the process of heating raw materials to form a glass liquid phase. The specific structure of glass-ceramics is closely related to its formula composition, except that it contains a certain amount of glass formers (SiO 2 , B 2 o 3 ,P 2 o 5 etc.) and induced ions (Li + , Mg 2+ , Zn 2+ etc.), often by introducing a crystal nucleating agent (ZrO 2 、TiO 2 , CaF 2 etc.) to promote the overall crystallization of the glass. [0003] Porous ceramic materials with high open porosity and high strength are made of high-quality raw materials such as alumina and sili...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B35/14C04B35/622C03C10/06
CPCY02P40/60
Inventor 李庆华梁勇王哲张明
Owner 辽宁罕王环保科技有限公司
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