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Tap hole stemming for large-scale blast furnace and preparation method

A tap hole and blast furnace technology, which is applied in the field of tap hole taphole mud for large blast furnaces and its preparation, can solve the problem that the use requirements of large blast furnaces cannot be better met, the taphole mud has weak resistance to molten iron scouring and erosion, and has no slag resistance. Iron erosion performance indicators and other issues, to achieve the effect of improving the resistance to slag iron corrosion and scouring, improving microporation indicators, and improving opening performance

Inactive Publication Date: 2013-10-23
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses anthracene oil as a binder, but the volatile amount of anthracene oil is more than that of tar, the fixed carbon content is much lower than that of tar, and there is no anti-slag and iron corrosion performance index, so it cannot better meet the use requirements of large blast furnaces
In summary, it is known that the thermal conductivity of the currently used blasting mud is small, the strength at low temperatures is low, and the blasting mud is weak in resistance to molten iron erosion and erosion.

Method used

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  • Tap hole stemming for large-scale blast furnace and preparation method
  • Tap hole stemming for large-scale blast furnace and preparation method
  • Tap hole stemming for large-scale blast furnace and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: carry out batching according to the following requirements, and its component is by mass percentage:

[0036] Brown corundum with a particle size of 1mm<≤3mm: 20 parts by weight;

[0037] 320 mesh < particle size ≤ 1mm brown corundum: 10 parts by weight;

[0038] Particle size ≤ 320 mesh brown corundum: 11 parts by weight;

[0039] Silicon carbide with 0mm<particle size≤1mm: 9 parts by weight;

[0040] Particle size ≤ 180 mesh ferrosilicon nitride: 12 parts by weight

[0041] 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 8 parts by weight, ring clay is 7 parts by weight, and the ring clay is purchased from Wuhan Mining Company The product;

[0042] Silicon powder with a particle size of ≤320 mesh: 7 parts by weight;

[0043] α-alumina with a particle size of ≤5 μm: 3 parts by weight;

[0044] Coke powder with 0mm<particle size≤2mm: 6 parts by weight;

[004...

Embodiment 2

[0051] Embodiment 2: carry out batching according to the following requirements, and its component is by mass percentage:

[0052] Brown corundum with a particle size of 1mm<≤3mm: 20 parts by weight;

[0053] 320 mesh < particle size ≤ 1mm brown corundum: 10 parts by weight;

[0054] Particle size ≤ 320 mesh brown corundum: 10 parts by weight;

[0055] Silicon carbide with 0mm<particle size≤1mm: 15 parts by weight;

[0056]Particle size ≤ 180 mesh ferrosilicon nitride: 7 parts by weight

[0057] Clay with a particle size of ≤200 mesh: 11 parts by weight, the clay is Guangxi white clay;

[0058] Silicon powder with a particle size of ≤320 mesh: 9 parts by weight;

[0059] α-alumina with a particle size of ≤5 μm: 2 parts by weight;

[0060] Coke powder with 0mm<particle size≤2mm: 7 parts by weight;

[0061] Graphite with a particle size of ≤100 mesh: 3 parts by weight;

[0062] High-temperature asphalt with 0mm<particle size≤2mm: 6 parts by weight.

[0063] Weigh the abo...

Embodiment 3

[0067] Embodiment 3: carry out batching according to the following requirements, and its component is by mass percentage:

[0068] Brown corundum with a particle size of 1mm<≤3mm: 20 parts by weight;

[0069] 320 mesh < particle size ≤ 1mm brown corundum: 12 parts by weight;

[0070] Brown corundum with a particle size of ≤320 mesh: 18 parts by weight;

[0071] Silicon carbide with 0mm<particle size≤1mm: 8 parts by weight;

[0072] Ferrosilicon nitride with a particle size of ≤180 mesh: 6 parts by weight;

[0073] Particle size ≤ 200 mesh clay: 10 parts by weight, the clay is cycloclay, and the cycloclay is a product purchased from Wuhan Mining Company;

[0074] Silicon powder with a particle size of ≤320 mesh: 6 parts by weight;

[0075] α-alumina with a particle size of ≤5 μm: 5 parts by weight;

[0076] Coke powder with 0mm<particle size≤2mm: 10 parts by weight;

[0077] Graphite with a particle size of ≤100 mesh: 1 part by weight;

[0078] 0mm

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Abstract

The invention discloses a tap hole stemming for a large-scale blast furnace and a preparation method. The stemming is composed of a binder and the following ingredients: by weight, 40-50 parts of brown aluminum oxide, 8-15 parts of silicon carbide, 6-12 parts of ferro-silicon nitride, 10-15 parts of clay, 6-9 parts of silicon powder, 2-5 parts of alpha-Al2O3, 6-10 parts of coke powder, 1-3 parts of graphite, and 4-6 parts of high-temperature pitch. The binder is tar. The preparation method comprises steps: according to the above ingredients and weight parts, raw materials are prepared, and mixed uniformly, then tar is added into the raw materials, the mixture is subjected to roller compaction and mixing to form a stemming material. The addition amount of the tar is controlled to make the Marshall value of the stemming material be 1100-1400 KPa, the stemming material is then subjected to pressing and molding to obtain final products. The prepared stemming is advantaged by good integrated performances, high intensity, small average hole size, good heat conductivity coefficient and good performances of resistance to slag and iron, corrosion and washing.

Description

technical field [0001] The invention relates to a taphole clay for a large blast furnace and a preparation method thereof, belonging to the technical field of iron and steel metallurgical refractory materials. Background technique [0002] In recent years, with the rapid development of the iron and steel industry, the development process of large-scale blast furnaces has also been accelerated. The technical advantages of large-scale blast furnaces are mainly reflected in high efficiency and intensive, energy saving and emission reduction, low consumption and environmental protection, and information control. At the same time, the large-scale blast furnace also strongly promotes the development of refractory technology. Large-scale blast furnaces have high requirements on the quality of blast furnace clay due to their high output and large amount of iron in a single pass. It requires that the blasting mud must have excellent anti-slag iron erosion performance, good bonding s...

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 武钢集团有限公司
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