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Acid-resisting coating composition for ironmaking blast-furnace hot blast stove and using method thereof

A technology for spraying coatings for ironmaking blast furnaces, which is applied in the field of acid-resistant spraying coating compositions for ironmaking blast furnace hot blast stoves, and can solve problems such as cracking of steel shells and intergranular stress corrosion

Active Publication Date: 2012-10-24
ZHENGZHOU ANNEC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the wind temperature, the N in the air 2 and O 2 As the temperature rises, the amount of NOx produced by the reaction increases greatly. NOx diffuses outward through the refractory lining of the hot blast stove, reaches the steel shell of the hot blast stove, and encounters water (H 2 After O) steam, nitric acid (HNO 3 ), nitric acid in weak places such as welds of the steel shell, causing intergranular stress corrosion, resulting in cracking of the steel shell

Method used

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  • Acid-resisting coating composition for ironmaking blast-furnace hot blast stove and using method thereof

Examples

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example 1

[0025] Waste silica brick particles 3-1mm 25%

[0026] Silica particles 1-0mm 30%

[0027] Silica powder ≤0.088mm 30%

[0028] Bentonite ≤0.088mm 10%

[0029] SiO 2 Micropowder ≤1um 5%

[0030] Instant solid water glass powder +5%

[0031] Sodium fluorosilicate (curing agent) +1%

[0032] Plasticizer, carboxymethyl cellulose (CMC) +0.1%

[0033] After all raw materials are mixed and packaged, they will be supplied. That is, products supplied in one component.

example 2

[0035] Waste silicon to particles 3-1mm 25%

[0036] Pyrophyllite particles 1-0mm 30%

[0037] Silica powder ≤0.088mm 25%

[0038] Waste porcelain powder ≤0.088mm 5%

[0039] Bound clay powder ≤0.088mm 12%

[0040] SiO 2 Micropowder ≤1um 3%

[0041] Curing agent, sodium fluorosilicate powder +1.0%

[0042] Plasticizer, Dextrin +2.0%

[0043] Liquid Water Glass +10%

[0044] All solid raw materials are mixed and packaged for supply, and liquid water glass barrels are supplied together for supply. That is, products supplied in two components.

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Abstract

The invention relates to an acid-resisting coating composition for an ironmaking blast-furnace hot blast stove and a using method thereof. In the composition, a certain quantity of plasticizers, bonding agents and curing agents are added into acidic or semi-acidic materials serving as main raw materials to form acid-resisting coatings; and the acid-resisting coatings are widely applied to the ironmaking blast-furnace hot blast stove, so that vulnerable positions such as welding joints and the like of a steel shell are protected effectively, and the intergranular stress corrosive action of acid is relieved and eliminated.

Description

technical field [0001] The invention relates to the proportion and method of a high-temperature-resistant and acid-resistant spray coating, in particular to an acid-resistant spray coating composition for ironmaking blast furnace hot blast stove and its application method. Background technique [0002] Low-carbon economy, energy saving and emission reduction, and clean production are the main themes of today's society. In the iron and steel production chain, a large amount of waste gas needs to be discharged and a large amount of energy is consumed in the ironmaking process, and ironmaking enterprises shoulder the heavy responsibility of energy conservation and emission reduction. [0003] During the ironmaking process, a large amount of coke and coal need to be burned, which generates CO 2 Emissions into the atmosphere pollute the air and produce a greenhouse effect; coke and coal are important non-renewable resources and energy sources on the earth. The main equipment fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26
Inventor 李建涛孙庚辰周国录陈泉锋
Owner ZHENGZHOU ANNEC IND