High-temperature high-emissivity silica brick for glass melting furnace and preparation method of high-temperature high-emissivity silica brick

A technology of glass melting furnace and high radiation rate, which is applied in the field of refractory materials, can solve the problems of reducing infrared radiation rate, achieve the effects of improving radiation matching, increasing heat utilization rate, and strengthening radiation heat transfer

Inactive Publication Date: 2018-08-14
SHENZHEN TRIUMPH TECH ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the infrared radiation rate of silica bricks decreases with the increase of temperature, and the infrared radiation rate is only 0.46 at 1500 °C. Obviously, the inner wall of the existing silica brick furnace cannot meet the needs of high temperature radiation heat transfer in the furnace, and must be carried out. transform

Method used

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  • High-temperature high-emissivity silica brick for glass melting furnace and preparation method of high-temperature high-emissivity silica brick

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the present invention provides a high-temperature, high-emissivity silica brick for a glass melting furnace, comprising a silica brick main body 1, and the surface of the silica brick main body 1 is coated with a nano-infrared coating 2;

[0032] The weight percentage of the components contained in the main body of the silica brick is: 20% of silica with a particle size of 5-10mm, 40% of silica with a particle size of 0.5-5mm, 25% of silica powder with a particle size of 100-600μm, and 25% of silica powder with a particle size of less than 5μm Quartz powder 15%, and mineralizers accounting for 2% of the total weight of the above components, 10% composite additives and 1% silicon carbide;

[0033] The mineralizer comprises the following components by weight percentage: milk of lime 60%, iron scale 10%, boric acid 18%, lithium carbonate 9% and sodium carbonate 3%;

[0034] The composite additive comprises the following components by weight perc...

Embodiment 2

[0049] Such as figure 1 As shown, the present invention provides a high-temperature, high-emissivity silica brick for a glass melting furnace, comprising a silica brick main body 1, and the surface of the silica brick main body 1 is coated with a nano-infrared coating 2;

[0050] The weight percentage of the components contained in the main body of the silica brick is: 30% of silica with a particle size of 5-10mm, 30% of silica with a particle size of 0.5-5mm, 20% of silica powder with a particle size of 100-600μm, and silica powder with a particle size of less than 5μm. 20% quartz powder, 3% mineralizer, 7% composite additive and 2% silicon carbide accounting for the total weight of the above components;

[0051] The mineralizer comprises the following components by weight percentage: milk of lime 65%, iron scale 8%, boric acid 20%, lithium carbonate 3% and sodium carbonate 4%;

[0052]The composite additive comprises the following components by weight percentage: 12% ammoni...

Embodiment 3

[0067] Such as figure 1 As shown, the present invention provides a high-temperature, high-emissivity silica brick for a glass melting furnace, comprising a silica brick main body 1, and the surface of the silica brick main body 1 is coated with a nano-infrared coating 2;

[0068] The weight percentage of the components contained in the main body of the silica brick is: 35% of silica with a particle size of 5-10 mm, 25% of silica with a particle size of 0.5-5 mm, 15% of silica powder with a particle size of 100-600 μm, and 15% of silica powder with a particle size of less than 5 μm. 25% of quartz powder, and 3.5% of mineralizer, 6% of composite additives and 3% of silicon carbide accounting for the total weight of the above components;

[0069] The mineralizer comprises the following components by weight percentage: milk of lime 70%, iron scale 6%, boric acid 12%, lithium carbonate 4% and sodium carbonate 8%;

[0070] The composite additive comprises the following components b...

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Abstract

The invention discloses a high-temperature high-emissivity silica brick for a glass melting furnace and a preparation method of the high-temperature high-emissivity silica brick. The silica brick comprises a silica brick body, the surface of which is coated with a nano infrared coating layer; the silica brick body is prepared from differently graded silica raw materials, a mineralizer, a compositeadditive and silicon carbide; the nano infrared coating layer is prepared from a silicious high-emissivity base material, silicon powder, silicon boride, silicon nitride, silica sol, auxiliaries anddeionized water; the silica brick is obtained by a series of steps including burdening, mixing, forming, drying, spraying, surface-drying and sintering. The surface of the silica brick is coated withthe nanoscale high-emissivity infrared coating layer; after being sintered at high temperature, the coating layer is firmly attached to the surface of the silica brick body, and partially permeates through the silica brick body, thus being capable of remarkably improving the emissivity of the silica brick at high temperature, enhancing radiative transfer in the glass melting furnace, and achievingthe benefits of energy conservation and emission reduction; besides, the dense coating layer can also have the effects of protecting the silica brick and prolonging the service life of the silica brick.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a high-temperature, high-emissivity silica brick for a glass melting furnace and a preparation method thereof. Background technique [0002] Glass melting furnace is a thermal equipment used to melt glass batch materials in the glass manufacturing process. It is usually composed of refractory materials, and its investment is large, accounting for about 1 / 3 of the total investment. Silica brick is a cheap refractory material, SiO 2 With a content of more than 93%, it has the characteristics of high creep resistance, low specific gravity and low thermal conductivity, and is widely used in glass melting furnace roof, parapet and front and rear walls. [0003] However, with the popularization and development of large-scale glass melting furnaces in the glass industry and the increasing requirements for energy conservation and emission reduction, glass manufacturers have put forwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C03B5/43C04B35/14C04B41/87C04B35/64
CPCC03B5/43C04B35/14C04B35/64C04B35/66C04B41/009C04B41/5035C04B41/87C04B2235/3201C04B2235/3203C04B2235/3208C04B2235/3272C04B2235/3409C04B2235/3826
Inventor 王贵祥潘作付陈卓汤红运万一刘燚
Owner SHENZHEN TRIUMPH TECH ENG
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