Single-iron notch blast furnace main channel self-flow repairing material

A self-flow repairing material and blast furnace technology, which is applied in the field of blast furnace ironmaking refractories, can solve the problems of insufficient explosion-proof performance and self-flow penetration performance, inability to repair small cracks, unsuitable and other problems, so as to improve the overall service life and utilization rate. The effect of self-flow performance, good high permeability

Active Publication Date: 2012-07-11
CHANGXING MINGTIAN FURNACE CHARGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general multi-tap self-flowing repair castables are not suitable for use on single-tap blast furnaces due to insufficient explosion-proof performance and self-flowing permeability. Repairs may burst at high temperatures and cannot repair small cracks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Self-flowing repair material for the main ditch of a single iron hole blast furnace, brown corundum or dense corundum: 46 parts, silicon carbide superfine powder: 20 parts, white corundum: 13 parts, α-Al 2 o 3 : 5 parts, silica powder: 2 parts, paraffin wax: 1.6 parts, spherical pitch: 5 parts, metal silicon: 3 parts, ethylene glycol: 1 part, chromium oxide: 0.2 parts, boron nitride: 0.5 parts, zirconia: 0.2 part, composite additive: 2 parts, composite explosion-proof agent: 0.5 part, present embodiment is the best embodiment. The composite additive includes the following components and the mass percentage of each component is: water reducer: 20%-30%, dispersant: 10%-25%, antioxidant: 45%-55%, hardener: 20%- 25%. The water reducer is polycarboxylate water reducer, the dispersant is sodium polyacrylate, the antioxidant is boron carbide, and the hardener is tetraethylenepentamine. The composite anti-explosion agent includes the following components and the mass percent...

Embodiment 2

[0019] The mass ratio of each component is: brown corundum or dense corundum: 49 parts, silicon carbide superfine powder: 18 parts, white corundum: 12 parts, α-Al 2 o 3 : 6 parts, silica powder: 1.2 parts, paraffin wax: 1 part, spherical pitch: 5.2 parts, metal silicon: 3.5 parts, ethylene glycol: 1.2 parts, chromium oxide: 0.3 parts, boron nitride: 0.6 parts, zirconia: 0.3 parts, composite additives: 1.5 parts, composite explosion-proof agent: 0.3 parts, the cost of this formula is lower.

Embodiment 3

[0021] The mass ratio of each component is: brown corundum or dense corundum: 42 parts, silicon carbide superfine powder: 23 parts, white corundum: 15 parts, α-Al 2 o 3 : 5 parts, silica powder: 2.3 parts, paraffin wax: 1.3 parts, spherical pitch: 4.9 parts, metal silicon: 3.5 parts, ethylene glycol: 1.3 parts, chromium oxide: 0.25 parts, boron nitride: 0.7 parts, zirconia: 0.26 parts, composite additive: 2.1 parts, composite explosion-proof agent: 0.4 parts, the effect of this formula is better.

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PUM

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Abstract

The invention discloses a single-iron notch blast furnace main channel self-flow repairing material which comprises the following components by mass ratio: 40-50 parts of brown corundum or compact corundum, 18-25 parts of silicon carbide superfine powder, 12-15 parts of white corundum, 4-6 parts of alpha-Al2O3, 1-3 parts of silica micropowder, 1-2 parts of paraffin, 4.8-5.6 parts of ball pitch, 3-5 parts of silicon metal, 1-2 parts of ethylene glycol, 0.2-0.3 part of chromic oxide, 0.5-0.8 part of boron nitride, 0.2-0.3 part of zirconium oxide, 1.5-2.5 parts of compound additive and 0.3-0.5 part of composite explosion-proof agent. The single-iron notch blast furnace main channel self-flow repairing material is good in self-flow performance and high in permeability, can be used for greatlyimproving the repairing effect, and is very convenient in repairing operation; when the repairing material is used in a repairing technology, a construction tool is not needed in the operation, and the material is only needed to be placed at the corresponding position to be repaired without vibration; and the good self-flow function of the material can be used for repairing, so that the construction safety is improved, and the labor intensity of workers can be lightened.

Description

【Technical field】 [0001] The invention relates to the field of refractory materials for blast furnace ironmaking, in particular to the improvement of the formula of a self-flowing repair material for the main channel of a single taphole blast furnace. 【Background technique】 [0002] At present, more than half of my country's steel production still comes from 1000m 3 The following blast furnaces, quite a few of which are single-taphole blast furnaces, have relatively limited application of tapping troughs in multi-taphole blast furnaces in terms of mature and advanced integral casting materials and repair processes due to the absence of spare iron troughs. [0003] At present, the main construction technology used for the iron storage type tapping main ditch of the single taphole blast furnace is: when the main ditch needs to be repaired, it is repaired with ramming material or castable. Since there is no spare main groove, the repair time is limited, the baking is not in pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 佘成明佘亚锋
Owner CHANGXING MINGTIAN FURNACE CHARGE
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