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A kind of anti-corrosion composite silica brick and preparation method thereof

A technology of anti-corrosion and silica bricks, which is applied in the field of refractory materials, can solve the problems of insufficient dispersion of silica bricks, easy flocculation of lime milk solution, and insufficient particle size of iron oxide, so as to improve acid and alkali corrosion resistance, rich raw materials, and reduce The effect of porosity

Active Publication Date: 2017-09-29
冷水江市中孚耐火材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the particle size of iron oxide is not fine enough when the existing silica brick is made, and the dispersion in the silica brick is not uniform enough; calcium oxide is actually added with calcium hydroxide, and its milk of lime solution is easy to flocculate and not easy to disperse. Provide a corrosion-resistant composite silica brick with excellent thermal shock resistance, strong resistance to slag and alkali metal erosion, erosion resistance, excellent heat insulation performance, and good high-temperature volume stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An anti-corrosion composite silica brick, which uses silica as the main raw material, and the main raw material silica is divided into silica particles, silica powder, silica coarse powder and silica fine powder according to the particle size. The anti-corrosion composite silica brick is composed of the following weight percentages: Silica particles 15%, silica powder 40%, silica coarse powder 20%, silica fine powder 6%, graphene 4%, composite mineralizer 3%, binder 2% and nano zirconia 10%.

[0034]The parts by weight of each component in the raw material composition of the composite mineralizer are: 50 parts of granite, 30 parts of fluorite, 25 parts of potassium feldspar, 20 parts of diatom mud, 2 parts of boron nitride, and 3 parts of glass microspheres , 10 parts of nano-iron oxide and 5 parts of nano-zinc oxide. The composite mineralizer is prepared through the following steps: 1) crush granite, fluorspar, and potassium feldspar through 100-300 mesh sieves and rem...

Embodiment 2

[0041] An anti-corrosion composite silica brick, which uses silica as the main raw material, and the main raw material silica is divided into silica particles, silica powder, silica coarse powder and silica fine powder according to the particle size. The anti-corrosion composite silica brick is composed of the following weight percentages: 20% silica particles, 30% silica powder, 15% coarse silica powder, 19% fine silica powder, 6% graphene, 2% composite mineralizer, 3% binder and 5% nano-zirconia.

[0042] The parts by weight of each component in the raw material composition of the composite mineralizer are: 50 parts of granite, 30 parts of fluorite, 25 parts of potassium feldspar, 20 parts of diatom mud, 2 parts of boron nitride, and 3 parts of glass microspheres , 10 parts of nano-iron oxide and 5 parts of nano-zinc oxide. The composite mineralizer is prepared through the following steps: 1) crush granite, fluorspar, and potassium feldspar through 100-300 mesh sieves and re...

Embodiment 3

[0049] An anti-corrosion composite silica brick, which uses silica as the main raw material, and the main raw material silica is divided into silica particles, silica powder, silica coarse powder and silica fine powder according to the particle size. The anti-corrosion composite silica brick is composed of the following weight percentages: 30% silica particles, 20% silica powder, 10% coarse silica powder, 15% fine silica powder, 8% graphene, 4% composite mineralizer, 5% binder and 8% nano-zirconia.

[0050] The parts by weight of each component in the raw material composition of the composite mineralizer are: 50 parts of granite, 30 parts of fluorite, 25 parts of potassium feldspar, 20 parts of diatom mud, 2 parts of boron nitride, and 3 parts of glass microspheres , 10 parts of nano-iron oxide and 5 parts of nano-zinc oxide. The composite mineralizer is prepared through the following steps: 1) crush granite, fluorspar, and potassium feldspar through 100-300 mesh sieves and re...

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Abstract

The invention relates to an anti-corrosion composite silica brick and a preparation method thereof. Silica is used as the main raw material, and the main raw material silica is divided into silica particles, silica powder, silica coarse powder and silica fine powder according to the particle size. The composite composition is: silica Granules, silica powder, silica coarse powder, silica fine powder, graphene, composite mineralizer, binder and nano zirconia. The silica brick of the present invention has excellent thermal shock resistance, strong resistance to slag and alkali metal erosion, erosion resistance, excellent heat insulation performance, and good high-temperature volume stability; graphene makes the internal contact of the silica brick closer, thereby reducing Minimize the stress caused by expansion during firing to prevent loosening or cracking of the product; the high strength of graphene ensures the excellent mechanical properties of the silica brick, and at the same time can improve the acid and alkali corrosion resistance of the silica brick.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a corrosion-resistant composite silica brick with excellent thermal shock resistance, strong resistance to slag and alkali metal erosion, erosion resistance, excellent heat insulation performance, and good high-temperature volume stability and its Preparation. Background technique [0002] With the increasing shortage of energy, countries pay more and more attention to the development, production and use of energy-saving materials for high-temperature industry. Silica bricks have been widely used and researched in lightweight refractory systems due to their high load softening temperature, good volume stability at high temperatures, and no shrinkage after long-term use. [0003] Due to the large volume expansion caused by the rapid crystal transformation of silica during heating, the firing of silica bricks is more difficult than other refractory materials. The cor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 陈梦佳
Owner 冷水江市中孚耐火材料有限责任公司