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Gunning material for main tapping channel of single-taphole blast furnace

A blast furnace tapping and gunning material technology is applied in the field of iron-making refractory materials, which can solve the problems of gunning piles and easy falling off, and achieve the effects of increasing hydration speed, improving high temperature slag corrosion resistance, and excellent explosion-proof performance.

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

[0005] The purpose of the present invention is to solve the problems in the prior art, and propose a gunning material for the main ditch of the single tap hole blast furnace, which can improve the high-temperature slag erosion resistance and explosion-proof performance of the gunning material, and improve the hydration of the gunning material Speed, solve the problem of gunning accumulation and easy falling off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Gunning material for single taphole blast furnace tapping main channel, including the following components and the mass ratio of each component is: dense corundum or brown corundum: 48 parts, silicon carbide: 28 parts, white corundum: 8 parts, α-Al 2 o 3 Micropowder: 7 parts, silica powder: 2 parts, pure calcium aluminate cement: 2.5 parts, spherical asphalt: 3 parts, metal silicon powder: 3 parts, nano-silica aluminum gel powder: 1.2 parts, boron nitride: 0.7 parts, Neodymium oxide: 0.4 parts, zirconia: 0.7 parts, composite additive: 2.3 parts, composite explosion-proof agent: 0.4 parts. The composite additive includes the following components and the mass ratio of each component is: water reducer: 10-15 parts, retarder: 18-22 parts, dispersant: 18-20 parts, antioxidant: 45-55 parts, hardener : 10% - 16 servings. The water reducer is sodium tripolyphosphate, the retarder is phosphate or borax, the dispersant is sodium polyacrylate, the antioxidant is boron carbide, a...

Embodiment 2

[0020] Gunning material for single taphole blast furnace tapping main channel, including the following components and the mass ratio of each component is: dense corundum or brown corundum: 51 parts, silicon carbide: 25 parts, white corundum: 7 parts, α-Al 2 o 3 Micropowder: 9 parts, silica powder: 1 part, pure calcium aluminate cement: 2.7 parts, spherical asphalt: 2 parts, metal silicon powder: 4 parts, nano-silica aluminum gel powder: 1.1 parts, boron nitride: 0.8 parts, Neodymium oxide: 0.5 parts, zirconia: 0.8 parts, composite additive: 2 parts, composite explosion-proof agent: 0.3 parts, the product quality is higher.

Embodiment 3

[0022] Gunning material for single taphole blast furnace tapping main channel, including the following components and the mass ratio of each component is: dense corundum or brown corundum: 46 parts, silicon carbide: 31 parts, white corundum: 11 parts, α-Al 2 o 3 Micropowder: 5 parts, silica powder: 3 parts, pure calcium aluminate cement: 2.1 parts, spherical asphalt: 4.7 parts, metal silicon powder: 4 parts, nano-silica aluminum gel powder: 1.5 parts, boron nitride: 0.6 parts, Neodymium oxide: 0.3 parts, zirconia: 0.5 parts, composite additive: 2.4 parts, composite explosion-proof agent: 0.5 parts, and the product cost is lower.

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PUM

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Abstract

The invention discloses a gunning material for a main tapping channel of a single-taphole blast furnace. The gunning material comprises the following components in part by mass: 45 to 52 parts of dense corundum or brown corundum, 24 to 32 parts of silicon carbide, 6 to 12 parts of white corundum, 5 to 10 parts of alpha-Al2O3 micro powder, 1 to 3 parts of micro silicon powder, 2 to 3 parts of purecalcium aluminate cement, 1 to 5 parts of spherical asphalt, 2 to 4 parts of silicon metal powder, 1 to 1.5 parts of nano silicon-aluminum gel powder, 0.5 to 0.8 part of boron nitride, 0.3 to 0.5 part of neodymium oxide, 0.5 to 0.8 part of zirconia, 2 to 2.5 parts of compound additive and 0.3 to 0.5 part of compound explosion-proof agent. The high temperature slag corrosion resistance, high temperature strength, hydration rate and early strength of the gunning material are improved, the gunning material has high explosion-proof property and quickly achieves high temperature strength at high temperature, and the gunning stack cannot fall.

Description

【Technical field】 [0001] The invention relates to the technical field of refractory materials for ironmaking, in particular to the improvement of the gunning material for the tapping main channel of a single taphole blast furnace. 【Background technique】 [0002] At present, more than half of my country's steel production capacity still comes from 1000m 3 Most of the following blast furnaces are single-taphole blast furnaces. Since there is no spare iron chute, the application of the more mature and advanced integral casting materials and techniques of multi-taphole blast furnaces to the tapping chute of this type of blast furnace is greatly restricted. [0003] At present, the main construction technology of single taphole blast furnace tapping channel is: the main channel adopts non-storage iron design, the slope is about 5%, the working lining of the main channel is constructed by ramming materials, and when it needs to be repaired during use, ramming is used. Beat the ma...

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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