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Durable blowpipe material

A durable and tube material technology, applied in the field of metal smelting and durable blow tube material, can solve the problems affecting the life of the blow tube steel shell, the influence of blast furnace intensified smelting operation, and the blow tube is prone to redness, so as to improve the density and thermal shock stability properties, high strength, and reduced hardening time

Inactive Publication Date: 2016-07-20
长兴云峰炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After adopting enhanced smelting measures, the blowpipe is often prone to redness, and even the newly poured blowpipe becomes red as a whole just after use, and the newly poured blowpipe has to be replaced
On the one hand, this affects the life of the steel shell of the blowpipe. On the other hand, frequent replacement of the blowpipe also affects the intensive smelting operation of the blast furnace.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: mullite: 45 parts; coke gem: 25 parts; graphite powder: 15 parts; metal silicon powder: 5 parts; silicon carbide: 7 parts; calcium peraluminate cement: 10 parts; explosion-proof fiber: 2 parts ; Composite micropowder: 15 parts; Composite admixture: 5 parts; Composite water reducing agent: 3 parts.

Embodiment 2

[0026] Example 2: mullite: 40 parts; coke gem: 30 parts; graphite powder: 10 parts; metal silicon powder: 5 parts; silicon carbide: 5 parts; calcium peraluminate cement: 10 parts; explosion-proof fiber: 2 parts ; Composite micropowder: 10 parts; Composite admixture: 3 parts; Composite water reducing agent: 4 parts.

Embodiment 3

[0027] Example 3: mullite: 50 parts; coke gem: 25 parts; graphite powder: 15 parts; metal silicon powder: 3 parts; silicon carbide: 8 parts; calcium peraluminate cement: 6 parts; explosion-proof fiber: 3 parts ; Composite micropowder: 12 parts; Composite admixture: 4 parts; Composite water reducing agent: 4 parts.

[0028] The present invention introduces carbon powder, silicon powder and composite additives with a particle size of 10um into the blow pipe material by improving the formula. The introduction of special carbon powder and silicon powder of about 10um produces SiC whiskers evenly distributed in the matrix and particle gaps during the firing process, filling the expansion of the material during the firing process, and SiC combined with the ceramic phase improves the density and density of the material. Thermal shock stability, while obtaining higher strength, reduces the probability of burn-through of the blowpipe during use. Composite sodium hexametaphosphate and ...

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Abstract

The invention discloses a durable blowpipe material. Through improving a formula and introducing carbon powder and silicon powder, of which the particle size is 10 microns, and compounded admixtures into the blowpipe material, the introduced special carbon powder and silicon powder with the particle size of about 10 microns produce SiC whiskers during firing, the SiC whiskers are uniformly distributed in gaps between a matrix and particles, the expansion resulting from the firing of the material is filled up, and SiC is bonded with a ceramic phase so as to improve the density and thermal shock stability of the material; and meanwhile, relatively high strength is obtained, so that the probability of burn-through of blowpipes during use is lowered. Compound sodium hexametahposphate, sodium tripolyphosphate and the like are adopted as the admixtures, so that the fluidity during the manufacturing of the blowpipes is improved and is relatively good, the hardening time for the blowpipe material is shortened, and the production schedule of the material is guaranteed; and on the other hand, bonding strength is generated during the manufacturing of the blowpipes, and the internal bonding mode of the blowpipes is changed into ceramic bond after baking and firing, so that the strength of the material is improved, and the service lives of the blowpipes are prolonged.

Description

【Technical field】 [0001] The invention relates to the technical field of metal smelting, in particular to the technical field of durable blowpipe material. 【Background technique】 [0002] At present, the blast furnace blowpipe is made of corundum-mullite castable to cast the inner lining of the blowpipe. Generally, a layer of heat-resistant fiber cotton needs to be placed between the castable and the steel shell to achieve the heat insulation effect. In recent years, with the continuous improvement of ironmaking technology and the application of high blast temperature, high oxygen enrichment, and large coal injection, accidents have occurred in the blast furnace air supply system. After adopting enhanced smelting measures, the blowpipe is often prone to redness, and even the newly poured blowpipe is red as a whole just after use, and the newly poured blowpipe has to be replaced. On the one hand, this affects the life of the steel shell of the blowpipe. On the other hand, fr...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/30C04B2235/3208C04B2235/3217C04B2235/3418C04B2235/3463C04B2235/349C04B2235/3826C04B2235/425C04B2235/428C04B2235/447C04B2235/448C04B2235/449C04B2235/5212
Inventor 佘云锋佘成其吴建华
Owner 长兴云峰炉料有限公司
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