Anti-cinder high-temperature coating

A high-temperature coating technology, which is applied in the field of slag-resistant high-temperature coatings, can solve the problems of slag entering the refractory layer, the inability to resist slag erosion, and the volume shrinkage of the anti-corrosion coating layer, and achieve excellent resistance to slag penetration and corrosion. Volume stability, the effect of reducing the chance of erosion

Active Publication Date: 2010-03-10
PUYANG REFRACTORIES GRP CO LTD +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

If the above-mentioned anti-corrosion coating is applied to the heating furnace and placed on the refractory layer of the heating furnace, although it has certain thermal stability and can isolate the slag from the refractory layer, it cannot achieve resistance to slag erosion purpose, because in the aforementioned high-temperature treatment process, the addition of the composite binder in the above-mentioned high-temperature anti-corrosion coating will cause the volume shrinkage of the anti-corrosion coating layer due to the volatilization and sintering of the binder under the action of high temperature, and at the same time due to the high-temperature anti-corrosion coating There is no substance added that can neutralize the above-mentioned volume shrinkage phenomenon at high temperature, so that the cracking of the anti-corrosion coating layer is easy to occur, and it is easy to cause slag to enter the refractory material layer, seriously affecting production safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 70 parts of chromium oxide green with a particle size of 0.044-0mm (not equal to 0), 25 parts of quartz sand powder with a particle size of 0.088-0mm (not equal to 0), and a particle size of 0.044-0mm (not equal to 0) 5 parts of silica powder, mix and stir the above raw materials for 3 to 4 minutes until the above raw materials are mixed evenly, then add 15 parts of water glass with a Baume degree of 50 to the above mixture, and stir again for 4 to 6 minutes until The uniformity of the mixture can meet the construction requirements. The above-mentioned parts are all parts by weight.

[0031] The high-temperature paint obtained above was measured, wherein the content of chromium oxide was 67.42wt%, and the content of silicon oxide was 29.60wt%.

Embodiment 2

[0033]Weigh 65 parts of chromium oxide green with a particle size of 0.044-0mm (not equal to 0), 27 parts of quartz sand powder with a particle size of 0.088-0mm (not equal to 0), and a particle size of 0.044-0mm (not equal to 0) 8 parts of silicon oxide powder, mix and stir the above raw materials for 3 to 4 minutes until the above raw materials are mixed uniformly, then add 14 parts of water glass with a Baume degree of 50 to the above mixture, and stir again for 4 to 6 minutes until The uniformity of the mixture can meet the construction requirements. The above-mentioned parts are all parts by weight.

[0034] The high-temperature paint obtained above was measured, wherein the content of chromium oxide was 62.52wt%, and the content of silicon oxide was 35.08wt%.

Embodiment 3

[0036] Weigh 72 parts of chromium oxide green with a particle size of 0.044-0mm (not equal to 0), 27 parts of quartz sand powder with a particle size of 0.088-0mm (not equal to 0), and a particle size of 0.044-0mm (not equal to 0) 1 part of silica powder, mix and stir the above raw materials for 3 to 4 minutes until the above raw materials are mixed evenly, then add 13 parts of silica sol to the above mixture, and stir again for 4 to 6 minutes until the uniformity of the mixture is suitable for construction Just ask. The above-mentioned parts are all parts by weight.

[0037] The high-temperature paint obtained above was measured, wherein the content of chromium oxide was 68.86wt%, and the content of silicon oxide was 29.78wt%.

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Abstract

The invention discloses an anti-cinder high-temperature coating prepared by the following raw materials in parts by weight: 60-75 parts of chromium oxide green, 20-40 parts of quartz sand powder, 0.2-10 parts of silicon oxide powder and 10-20 parts of inorganic binder. The anti-cinder high-temperature coating prepared by the raw materials has better volume and stability and can form a close-packedstructure after being sintered at high temperature, thereby ensuring that an anti-cinder high-temperature coating and a refractory material layer cannot bond because cinder permeates and enters in the coating layer; in addition, when heating furnaces are centrically treated, the anti-cinder high-temperature coating layer is very easy to strip, and the integrity of the refractory material layer can be also well ensured while stripping.

Description

technical field [0001] The invention relates to a slag-resistant high-temperature coating, in particular to a slag-resistant high-temperature coating applied to a heating furnace. Background technique [0002] In the field of steel rolling, before rolling or forging, the steel needs to be softened and heat-treated at 1300-1400°C; for this treatment process, heating furnaces are commonly used thermal equipment. [0003] The heating furnace uses industrial liquid (gas) fuel as the heat source, and the heat source burns in the furnace chamber to generate high-temperature flue gas and use it as the heat carrier to realize the heat treatment of the steel billet entering the heating furnace. During the heating process, the oxygen in the heating furnace will react with the steel slab, and react on the surface of the slab to form ferrous oxide and iron oxide. When the temperature in the heating furnace reaches 1360°C, the ferrous oxide on the surface of the slab will be called The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B28/26
Inventor 李彩霞顾华志张伟
Owner PUYANG REFRACTORIES GRP CO LTD
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