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Refractory spray coating with high steel fiber content and spraying method thereof

A technology of steel fiber and paint spraying, applied in the field of refractory materials, can solve the problems of materials being blocked in pipelines and unable to be transported

Active Publication Date: 2011-06-15
北京联合荣大工程材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the traditional heat-resistant steel fiber is added to the spray coating, it will cause the material to be blocked in the pipeline and cannot be conveyed (pumping or pneumatic conveying)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A fire-resistant spray coating with high steel fiber content, which is composed of refractory aggregate, refractory powder, binder, admixture, and steel fiber, and the ingredients are as follows in parts by weight:

[0032] The refractory aggregate is 30 parts of white corundum particles;

[0033] The refractory powder is 30 parts of white corundum fine powder, 5 parts of alumina micropowder and 2 parts of silica micropowder,

[0034] The binder is 20 parts of refractory cement;

[0035] The additives are 0.3 parts of metal aluminum, 0.1 parts of organic fiber and 0.2 parts of polyphosphate;

[0036] 301 heat-resistant steel fiber is 3 parts.

[0037] Spraying method: Add water to the dry mixture and stir it into mortar, then send it to the nozzle by pumping method, and the mortar is sprayed out with high-pressure air at the nozzle and adheres to the wall. The stirred mortar can also be conveyed to the nozzle by pneumatic force, and it can be directly sprayed out and...

Embodiment 2

[0039] A fire-resistant spray coating with high steel fiber content, which is composed of refractory aggregate, refractory powder, binder, admixture, and steel fiber, and the ingredients are as follows in parts by weight:

[0040] The refractory aggregate is 20 parts of sub-white particles and 40 parts of silicon carbide particles;

[0041] The refractory powder is 15 parts of white corundum fine powder, 3 parts of alumina micropowder, 2 parts of silicon micropowder and 10 parts of silicon carbide powder,

[0042] The binder is 10 parts of refractory cement;

[0043] The additives are 0.2 parts of polyphosphate, 2 parts of metal silicon and 3 parts of asphalt and 3 parts of graphite powder;

[0044] 310 heat-resistant steel fiber is 35 parts.

[0045] Spraying method: The dry mixture is pneumatically conveyed to the nozzle, sprayed with water at the nozzle and adhered to the wall.

[0046] Sodium aluminate solution needs to be added to the nozzle as an accelerator.

Embodiment 3

[0048] A fire-resistant spray coating with high steel fiber content, which is composed of refractory aggregate, refractory powder, binder, admixture, and steel fiber, and the ingredients are as follows in parts by weight:

[0049] The refractory aggregate is 40 parts of plate-shaped alumina particles and 20 parts of mullite particles;

[0050] The refractory powder is 15 parts of silicon carbide powder, 15 parts of white corundum powder, 8 parts of alumina powder and 3 parts of silicon micropowder;

[0051] The binder is 8 parts of Portland cement;

[0052] The additives are 1 part of metal silicon, 0.5 part of metal aluminum, 0.3 part of polyphosphate and 5 parts of asphalt;

[0053] 40 parts of 446 heat-resistant steel fiber.

[0054] Spraying method: The dry mixture is pneumatically conveyed to the nozzle, sprayed with water at the nozzle and adhered to the wall.

[0055] Sodium aluminate solution needs to be added to the nozzle as an accelerator.

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Abstract

The invention discloses a refractory spray coating with high steel fiber content and a spraying method thereof, which belong to the technical field of refractory materials. The method comprises the following step of: 1, pneumatically conveying the refractory spray coating to a nozzle, adding water onto the nozzle, and spraying and bonding the coating on a wall; or 2, adding water or a liquid bonding agent into the refractory spray coating, stirring the mixture into mortar, conveying the mortar to the nozzle by a pumping method, spraying the mortar out of the nozzle by using high-pressure air,and bonding the mortar on the wall. The refractory spray coating comprises the following ingredients in part by weight: 30 to 80 parts of refractory aggregate, 30 to 50 parts of refractory powder, 5 to 20 parts of bonding agent, 0.5 to 15 parts of additive and 3 to 80 parts of steel fiber. The invention has the advantages that: by spraying the refractory spray coating on a blast furnace cooling wall, spraying on a blast furnace throat steel brick, spraying on various refractory linings with cold faces and hot faces and repairing, the service life of the refractory material for the inner wall of a blast furnace can be greatly prolonged, and the effects of protecting the environment, saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention relates to a refractory spray coating with high steel fiber content and a spray coating method, belonging to the technical field of refractory materials. Background technique [0002] Refractory castable: a refractory mixture composed of various refractory aggregates, powders, binders and admixtures, and is constructed by pouring. [0003] Steel fiber reinforced refractory castable: some steel fibers are added to the castable, and the steel fiber can increase the flexural strength of the castable. The addition of traditional steel fibers generally cannot exceed 3% of the total weight of the castable, and the volume fraction of steel fibers cannot exceed 1% of the volume of the castable. [0004] Refractory spray coating: a refractory mixture composed of various refractory aggregates, powders, binders and admixtures, which is constructed by spraying. [0005] Requirements and problems of the prior art spraying process for spraying coatin...

Claims

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Application Information

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IPC IPC(8): C04B35/66B05B7/04B05B7/24
Inventor 章荣会
Owner 北京联合荣大工程材料股份有限公司
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