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Preparation method of honeycomb-shaped wear-resistant ceramic block

A wear-resistant ceramic and honeycomb technology, which is applied in the field of preparation of wear-resistant ceramic blocks, can solve problems such as limited effect, and achieve the effects of reducing the total amount, reducing the sintering temperature and improving the wear resistance.

Active Publication Date: 2021-03-16
湖南安普诺环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also a technical solution for local anti-wear strengthening treatment on the upper surface of the catalyst, but the effect is very limited and cannot fundamentally solve the problem

Method used

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  • Preparation method of honeycomb-shaped wear-resistant ceramic block
  • Preparation method of honeycomb-shaped wear-resistant ceramic block
  • Preparation method of honeycomb-shaped wear-resistant ceramic block

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preparation example Construction

[0043] The invention provides a preparation method of a honeycomb wear-resistant ceramic block, comprising mixing cordierite powder, mullite powder, kaolin, talc, potassium feldspar, quartz and calcium carbonate, adding binder and xanthan gum, After preparing the solution of sodium alginate and sodium polyacrylate, kneading the obtained mud, kneading the mud, forming it into a honeycomb shape, drying and sintering, so as to prepare the obtained honeycomb wear-resistant ceramic block. Among the above raw materials, the thermal expansion coefficient of cordierite is 0.5×10 -6 ~1.0×10 -6 K -1 , which mainly plays the role of reducing the expansion coefficient; mullite plays the role of increasing the strength and wear resistance of the ceramic block, and its thermal expansion coefficient is not large (4.7×10 -6 K -1 ); and kaolin, talc and quartz can react to form cordierite with a porous structure during the sintering process, so kaolin, talc and quartz can improve the sinter...

Embodiment 1

[0064] After mixing 45wt% of cordierite powder, 20wt% of spherical mullite powder passed through a 300-mesh sieve, 21wt% of calcined kaolin, 6wt% of talc, 5wt% of potassium feldspar, 2wt% of fused quartz, and 1wt% of calcium carbonate, add ceramic components The hydroxypropyl methylcellulose of total mass 4.5wt%; Then add the xanthan gum-sodium alginate-sodium polyacrylate aqueous solution of ceramic component gross mass 28%, wherein xanthan gum, sodium alginate and sodium polyacrylate The concentrations were 0.7wt%, 0.2wt% and 2.4wt%, respectively, to obtain sludge. Then knead the mud for 20 minutes, knead the mud, vacuum knead the mud, and extrude it into a honeycomb green body. After the green body is microwave dried and cut at a power of 80kW, it is kept at 1330°C for 2 hours to sinter the green body to obtain a density of 2.12g / cm 3 , the porosity is 21%, the flexural strength is 18MPa, and the coefficient of thermal expansion at room temperature -600°C is 1.9×10 -6 K ...

Embodiment 2

[0072] After mixing 40% cordierite powder, 25% spherical mullite powder passed through a 300-mesh sieve, 20% calcined kaolin, 7% talc, 4% potassium feldspar, 2% fused quartz and 2% calcium carbonate, add ceramic components The hydroxypropyl methylcellulose of total mass 4%; Then add the xanthan gum-sodium alginate-sodium polyacrylate aqueous solution of ceramic component total mass 26%, the concentration of xanthan gum, sodium alginate and sodium polyacrylate respectively At 0.7%, 0.2% and 2.4%, blends were obtained. After kneading the mixed material for 20 minutes, carry out mud refining, vacuum mud refining, and extrude into a honeycomb green body. After the green body is microwave dried and cut at a power of 80kW, it is sintered at 1330°C for 3 hours to obtain a density of 2.09g / cm 3 , the porosity is 24%, the flexural strength is 23MPa, and the coefficient of thermal expansion at room temperature -600°C is 2.2×10 -6 K -1 Cordierite-mullite wear-resistant honeycomb ceram...

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Abstract

The invention discloses a preparation method of a honeycomb-shaped wear-resistant ceramic block, which comprises the following steps: adding an adhesive and a forming aid into the raw materials of thehoneycomb-shaped wear-resistant ceramic block, kneading, pugging, forming, drying and sintering; the raw materials comprise 40-55wt% of cordierite powder, 10-25wt% of mullite powder, 16-22wt% of kaolin, 4-8wt% of talc, 3-6wt% of potassium feldspar, 1-3wt% of quartz and 1-2wt% of calcium carbonate; wherein the forming aid comprises a solution of xanthan gum, sodium alginate and sodium polyacrylate. The method provided by the invention is environment-friendly and low in cost, the prepared honeycomb wear-resistant ceramic block is long in service life, and the wear amount of the flue gas denitration catalyst can be reduced by more than 80%.

Description

technical field [0001] The invention relates to a preparation method of a wear-resistant ceramic block, which belongs to the field of ceramic preparation. Background technique [0002] At present, in order to protect the environment and reduce nitrogen oxide emissions, coal-fired power plants have a demand for flue gas denitrification devices, and flue gas denitrification in non-electric industries such as metallurgy and building materials is also being actively promoted. [0003] Among the existing denitrification processes, the selective catalytic reduction denitrification system (SCR, Selective Catalytic Reduction) is widely used for its mature technology and stable denitrification efficiency. SCR denitrification technology is to use SCR denitrification catalyst, under certain temperature conditions, with NH 3 As a reducing agent, it selectively catalyzes NO in flue gas x Converted to nitrogen and water, reducing NO x emission, reducing the pollution of flue gas to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B35/636C04B35/634C04B38/00
CPCC04B35/195C04B35/636C04B35/63424C04B35/6365C04B38/0006C04B2235/3463C04B2235/349C04B2235/3472C04B2235/3418C04B2235/442C04B2235/606C04B2235/77C04B2235/9607C04B38/0067C04B38/0074
Inventor 彭峻易作宏彭伟
Owner 湖南安普诺环保科技有限公司
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