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Castable for blast furnace burner port tail pipe

A technology of castables and high-aluminum materials, which is applied in the field of self-flowing castables, monolithic refractory materials, can solve problems such as unreachable use effects, and achieve the effects of increasing masonry efficiency, reducing labor intensity, and excellent performance

Inactive Publication Date: 2014-02-05
ZHENGZHOU ANNEC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, ordinary high-alumina castables cannot achieve the best results due to their creep properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw material ratio is as follows:

[0025] raw material name

% by weight

High aluminum material

64%

Andalusite

25%

Silica powder

4%

Aluminum oxide powder

3%

calcium aluminate cement

4%

Sodium tripolyphosphate (additional)

0.2%

Sodium hexametaphosphate (additional)

0.05%

[0026] The process includes the following steps:

[0027] (1) Calcium aluminate cement, silicon micropowder, and alumina micropowder were weighed with an electronic scale according to the proportions of the above examples, and then mixed with a double-screw mixer for 6-8 minutes;

[0028] (2) After the high alumina material and the andalusite material are weighed with an electronic scale according to the proportions of the above examples, they are mixed evenly with a double-screw mixer;

[0029] (3) Sodium tripolyphosphate and sodium hexametaphosphate are weighed according to the ratio of the above ex...

Embodiment 2

[0033] Processing step is identical with embodiment 1, and raw material ratio is as follows:

[0034] raw material name

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PUM

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Abstract

The invention provides a castable for a blast furnace burner port tail pipe. The castable is a mixture obtained by mixing a high aluminum material, andalusite material, silica micro powder, alumina micro powder, calcium aluminate cement, and additional sodium tripolyphosphate and sodium hexametaphosphate together. The castable provided by the invention is obviously superior than material used in the past in product strength, erosion resistance and using effect; the castable is capable of reducing the labor intensity of construction and improving the efficiency of construction; and the castable has excellent creepage and refractoriness under load, so that the service life of the blast furnace burner port tail pipe can be prolonged.

Description

technical field [0001] The invention relates to a casting material for the tailpipe of the combustion port of a hot blast stove, in particular to a self-flowing casting material, an amorphous refractory material mainly composed of high alumina material, andalusite material, silicon micropowder, aluminum micropowder and calcium aluminate cement. technical background [0002] The refractory material for the tailpipe of the burner will be eroded by high-temperature gas and scoured by the high-temperature air flow during use, so the requirements for the refractory material are particularly strict. Generally speaking, ordinary high-alumina castables cannot achieve the best use effect due to their creep properties. The invention improves the creep and load soft performance of the high-alumina castable on the basis of ensuring the thermal shock and body density performance of the high-alumina castable. Contents of the invention [0003] In order to solve the above technical prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 闫文嘉董红芹赵辉张保华李富朝李建涛
Owner ZHENGZHOU ANNEC IND