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A kind of high alumina refractory brick and preparation method thereof

A refractory brick, high-aluminum technology, applied in the field of building materials, can solve the problems of poor material performance, reduced performance, poor use timeliness, etc., to achieve excellent corrosion resistance and oxidation resistance, improve heat resistance, and strong adhesion effects.

Active Publication Date: 2021-11-23
DONGTAI HONGDA REFRACTORY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its rich raw materials and relatively low price, it is widely used in high-alumina refractory layers and linings of various firing kilns, heating devices, and soaking furnaces, which increases the heat storage effect of the kiln and reduces the weight of the kiln. However, the performance of the existing high-alumina refractory bricks is not good, especially the mechanical properties are affected by the internal structure of the material, resulting in reduced performance and poor timeliness of use, so it is necessary to effectively improve it

Method used

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  • A kind of high alumina refractory brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In terms of parts by weight, weigh 45 parts of mass fraction 60% ethanol, 3 parts of styrene monomer, 0.1 part of potassium persulfate and 0.1 part of sodium sulfite respectively and place them in a three-necked flask, stir and mix and exhaust the air with nitrogen, and control nitrogen ventilation. The feeding rate is 25mL / min. After the feeding is completed, stir and mix and place it at 75°C for 10 hours, then let it cool down to room temperature and collect the reaction solution. Stir the reaction solution with absolute ethanol at a mass ratio of 1:1. Mix and centrifuge, collect the lower precipitate and place it in an oven at 45°C, dry for 6 hours to obtain monodisperse polystyrene particles; weigh 45 parts of silica, 10 parts of alumina, 0.1 part of oxide Iron, 20 parts of quicklime, 5 parts of magnesium oxide, 1 part of potassium oxide and 1 part of sodium oxide were placed in a corundum crucible, stirred and mixed, heated and melted, heated at 5 °C / min to 1300 °C ...

Embodiment 2

[0030] In terms of parts by weight, weigh 47 parts of mass fraction 60% ethanol, 4 parts of styrene monomer, 0.1 part of potassium persulfate and 0.1 part of sodium sulfite respectively and place them in a three-necked flask, stir and mix and exhaust the air with nitrogen gas, and control the nitrogen gas flow. The feed rate is 27mL / min. After the feed is completed, stir and mix and place it at 77°C for 11 hours, then let it cool down to room temperature and collect the reaction solution. Stir the reaction solution with absolute ethanol at a mass ratio of 1:1. Mix and centrifuge, collect the lower precipitate and place it in an oven at 47°C, and dry it for 7 hours to obtain monodisperse polystyrene particles; in parts by weight, weigh 47 parts of silica, 12 parts of alumina, 0.1 part of oxide Iron, 25 parts of quicklime, 7 parts of magnesium oxide, 1 part of potassium oxide and 1 part of sodium oxide were placed in a corundum crucible, stirred and mixed, heated and melted, heat...

Embodiment 3

[0032] In parts by weight, weigh 50 parts of mass fraction 60% ethanol, 5 parts of styrene monomer, 0.2 part of potassium persulfate and 0.2 part of sodium sulfite respectively and place them in a three-necked flask. The feeding rate is 30mL / min. After the feeding is completed, stir and mix and place it at 80°C for 12 hours, then let it cool down to room temperature and collect the reaction solution. Stir the reaction solution with absolute ethanol at a mass ratio of 1:1. Mix and centrifuge, collect the lower precipitate and place it in an oven at 50°C for 8 hours to obtain monodisperse polystyrene particles; weigh 50 parts of silicon dioxide, 15 parts of aluminum oxide, and 0.2 parts of Iron, 30 parts of quicklime, 8 parts of magnesium oxide, 2 parts of potassium oxide and 2 parts of sodium oxide were placed in a corundum crucible, stirred and mixed, heated and melted, heated at 5 °C / min to 1500 °C for 3 hours, and the molten liquid was collected and watered Quench and cool, ...

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Abstract

The invention relates to a high-alumina refractory brick and a preparation method thereof, belonging to the technical field of building materials. In the technical solution of the present invention, by filling the dense glass transition layer on the surface of the monodisperse polystyrene microspheres, the structural performance of the material is further improved by forming a complex enamel during the melting process of the glass frit and clay, and the quality of the material is improved. Refractory strength. At the same time, high-alumina bauxite material is used as the main base material. After high-temperature calcination, high-alumina bauxite powder is filled in the pores of the brick body under high temperature conditions to promote sintering, which can effectively improve the mechanical strength of the brick body and high temperature resistance. Effective fire resistance and improved mechanical properties of the material.

Description

technical field [0001] The invention relates to a high-alumina refractory brick and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] High-temperature furnaces or high-temperature equipment are mainly made of high-alumina refractory materials for the lining and insulation layer. These high-temperature equipment have two types of operation modes: intermittent and continuous. In continuously operating equipment, the continuous heat flow is transferred outward through the enclosure structure, and finally dissipated to the atmosphere or the earth is the main way of heat loss. The thermal conductivity λ of the material in the envelope is directly proportional to the heat loss of the equipment. Therefore, this kind of equipment should be aimed at the ultimate goal of λ tending to 0 of high alumina refractory materials. In thermal equipment with intermittent or short-term operation, the heat loss of the equipment i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B38/06C04B35/634C04B35/63C04B35/10
CPCC04B35/10C04B35/6303C04B35/63432C04B35/66C04B38/067C04B2235/3201C04B2235/3206C04B2235/3208C04B2235/3272C04B2235/3418C04B2235/36C04B2235/6022C04B2235/606C04B2235/656C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607
Inventor 袁昌东李圆圆袁红韩坚
Owner DONGTAI HONGDA REFRACTORY MATERIAL
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