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Hot mending material for spray gun

A technology of thermal repair and spray gun, which is applied in the field of iron and steel smelting, can solve the problems of poor thermal stability, peeling, short service life, etc., and achieve the effects of good thermal stability, enhanced plasticity and long service life

Active Publication Date: 2010-11-10
营口东邦环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the violent erosion of molten iron and frequent rapid cooling and rapid heating, the refractory lining of the desulfurization spray gun is often eroded and peeled off. After each injection, some serious damage represented by a large number of cracks will be formed on the gun lining. The above phenomenon is serious. This greatly restricts the service life of the desulfurization spray gun and the technical and economic indicators of desulfurization
In order to effectively extend the service life of the desulfurization spray gun, many domestic manufacturers have successively used various repair materials for repair, but the above repair materials have long repair time, short service life, shrinkage cracking and peeling of the repair layer, low bonding strength, poor thermal stability, etc. features

Method used

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  • Hot mending material for spray gun

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A spray gun thermal repair material is characterized in that it comprises:

[0018] Mullite with particle size greater than 1.5mm 9%;

[0019] Mullite with particle size greater than 0.09mm 50%;

[0020] Mullite with a particle size of 0.088mm 20%;

[0021] Refractory cement 20%;

[0022] Aluminum dihydrogen phosphate or water glass 1%.

Embodiment 2

[0024] A spray gun thermal repair material is characterized in that it comprises:

[0025] Mullite with particle size greater than 1.5mm 8%;

[0026] Mullite with particle size greater than 0.09mm 51%;

[0027] Mullite with a particle size of 0.088mm 19%;

[0028] Refractory cement 21%;

[0029] Aluminum dihydrogen phosphate or water glass 1%.

Embodiment 3

[0031] A spray gun thermal repair material is characterized in that it comprises:

[0032] Mullite with particle size greater than 1.5mm 9%;

[0033] Mullite with a particle size greater than 0.09mm 49%;

[0034] Mullite with a particle size of 0.088mm 20%;

[0035] Refractory cement 20%;

[0036] Aluminum dihydrogen phosphate or water glass 1%;

[0037] Magnesia 1%.

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Abstract

The invention belongs to the steel smelting field and in particular relates to a hot mending material for a submarine spray gun for carrying out desulfuration pretreatment on molten iron. The mending material is characterized by comprising 8-12% of mullite with granularity being more than 1mm and less than 3mm, 45-55% of mullite with granularity being more than 0.088mm and less than 1mm, 18-22% of mullite with granularity of 0.088mm, 18-22% of refractory cement, 1-2% of aluminium dihydrogen phosphate or sodium silicate and 1-2% of magnesia by weight. The mending material has short mending time, long service life, high bonding strength, high hardening speed and good heat stability and can enhance the plasticity of the refractory mixture, increase the penetration depth of the mending material into the gun lining crack and prolong the life of the submarine spray gun.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a hot-state repairing material for hot metal pretreatment desulfurization submerged spray guns. Background technique [0002] The purpose of the desulfurization spray gun is to send the powdered reagent into the molten iron. For example, the spray gun will be used to desulfurize the molten iron by blowing the powdered magnesium agent with the compressed gas jet method. The spray gun used for the treatment of molten iron outside the single-blown granular magnesium furnace is a rather bulky refractory product. Due to the violent erosion of molten iron and frequent rapid cooling and rapid heating, the refractory lining of the desulfurization spray gun is often eroded and peeled off. After each injection, some serious damages represented by a large number of cracks will be formed on the gun lining. The above phenomenon is serious. This greatly restricts the service...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C21C7/064
Inventor 牟春树武允禄刘欣雨陈树村陈学新
Owner 营口东邦环保科技股份有限公司
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