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Stemming for super-huge type blast furnace and preparation method thereof

A super-large, tap-clay technology, which is applied in the field of super-large blast furnace mud and its preparation, can solve the problems of weak low-temperature strength, poor thermal conductivity, etc., to reduce porosity, improve microporation index, and promote growth and development. Effect

Active Publication Date: 2013-11-20
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the gun mud has improved thermal shock resistance, peeling resistance and high temperature strength to a certain extent, it has poor thermal conductivity and weak low temperature strength.

Method used

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  • Stemming for super-huge type blast furnace and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of microporous clay for super-large blast furnace, its raw material composition comprises by weight:

[0027] 1mm<particle size≤3mm brown corundum: 18 parts by weight;

[0028] 320 mesh < particle size ≤ 1mm brown corundum: 10 parts by weight;

[0029] Brown corundum with a particle size of ≤320 mesh: 11 parts by weight;

[0030] SiC with 0mm

[0031] Particle size ≤ 180 mesh Si 3 N 4 -Fe: 10 parts by weight, the Si 3 N 4 -Fe, Si 3 N 4 Accounted for 75~80%, Fe accounted for 12~16%, the balance is Fe 3 Si and SiO 2 ;

[0032] Particle size ≤ 200 mesh clay: 13 parts by weight, the clay is a mixture of Guangxi white clay and ring clay, wherein Guangxi white clay is 8 parts by weight, and ring clay is 5 parts by weight; the ring clay is purchased from Wuhan Mining Company The product.

[0033] Microporous additive: 11 parts by weight, the microporous additive includes Si powder and α-Al 2 o 3 Powder, wherein the we...

Embodiment 2

[0038] A kind of microporous clay for super-large blast furnace, its raw material composition comprises by weight:

[0039] 1mm

[0040] 320 mesh < particle size ≤ 1mm brown corundum: 10 parts by weight;

[0041] ≤320 mesh brown corundum: 17 parts by weight;

[0042] SiC with 0mm

[0043] Particle size≤180 mesh Si 3 N 4 -Fe: 11 parts by weight, the Si 3 N 4 -Fe, Si 3 N 4 Accounted for 75~80%, Fe accounted for 12~16%, the balance is Fe 3 Si and SiO 2 ;

[0044] Clay with a particle size of ≤200 mesh: 10 parts by weight, the clay is Guangxi white clay;

[0045] Microporous additive: 12 parts by weight, the microporous additive includes Si powder and α-Al 2 o 3 Powder, wherein the weight percentage of Si powder with a particle size of ≤320 mesh is 80%, and α-Al with a particle size of ≤5 μm 2 o 3 Powder weight percent is 20%;

[0046] Composite carbon material: 12 parts by ...

Embodiment 3

[0050] A kind of microporous clay for super-large blast furnace, its raw material composition comprises by weight:

[0051] Brown corundum with a particle size of 1mm<≤3mm: 20 parts by weight;

[0052] 320 mesh < particle size ≤ 3mm brown corundum: 10 parts by weight;

[0053] Brown corundum with a particle size of ≤320 mesh: 7 parts by weight;

[0054] SiC with 0mm

[0055] Particle size ≤ 180 mesh Si 3 N 4 -Fe: 16 parts by weight, the Si 3 N 4 -Fe, Si 3 N 4 Accounted for 75~80%, Fe accounted for 12~16%, the balance is Fe 3 Si and SiO 2 ;

[0056] Particle size ≤ 200 mesh clay: 15 parts by weight, the clay is a mixture of Guangxi white clay and ring clay, wherein Guangxi white clay is 9 parts by weight, and ring clay is 6 parts by weight; the ring clay is purchased from Wuhan Mining Company The product;

[0057] Microporous additive: 10 parts by weight, the microporous additive includes Si powder and α-Al 2 o 3 Powder, where...

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Abstract

The invention discloses a stemming for a super-huge type blast furnace and a preparation method thereof. The stemming comprises a bonding agent and the following components in parts by weight: 37-45 parts of brown aluminum oxide, 10-15 parts of clay, 6-12 parts of SiC, 10-16 parts of Si3N4-Fe, 10-12 parts of micropore additives, 8-12 parts of composite carbon materials and 4-6 parts of high-temperature asphalt, wherein the micropore additives comprise Si powder and alpha-Al2O3 powder, the composite carbon materials comprise coke dust and graphite, and the bonding agent is anthracene oil. The preparation method comprises the following steps of: proportioning the components in parts by weight, adding the anthracene oil after uniformly mixing the components, and carrying out grinding and mulling to form mud; and carrying out extruding and molding to obtain the stemming, wherein the adding amount of the anthracene oil is controlled to enable the Marshall value of the mud to be 1300-1500 KPa. The stemming prepared by utilizing the preparation method has the advantages that the comprehensive performance is good, the strength is high, the average pore size is small, the heat conductivity coefficient is relatively good, and the iron slag scouring resistance is good.

Description

technical field [0001] The invention relates to a material for blast furnace equipment, in particular to a blast furnace mud for an extra-large blast furnace and a preparation method thereof. Background technique [0002] With the rapid development of the iron and steel industry and the continuous improvement of smelting technology and equipment, the development of large-scale blast furnaces has also been accelerated. Because of its high output and large amount of iron in a single pass, super-large blast furnaces have high requirements on the quality of the blast furnace clay, which requires good resistance to slag iron erosion and erosion. Since it takes about 2 to 3 hours from the start of tapping to the completion of tapping in a super-large blast furnace, the expansion speed of the taphole needs to be relatively small, and the flow rate of molten iron needs to be controlled within a reasonable range, for example, the flow rate of iron is <10 tons / min. Since the tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 卢正东宋木森舒文虎杨佳龙李勇波孙戎邹祖桥
Owner 武汉钢铁有限公司
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