Torpedo ladle lining repair gunning mix

A gunning material and torpedo tank technology, applied in the field of torpedo tank lining repair gunning material, can solve problems such as damage, high production costs, affecting safe operation and service life, and achieve good refractoriness

Active Publication Date: 2014-04-16
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the long-term operation, the refractory lining of the torpedo tank is subject to slag, iron erosion, oxidation and seepage erosion, etc., and local or large areas are damaged, which affects its safe op

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The torpedo tank liner repair gunning material of the present invention is made of raw material Al 2 o 3 ≥94% brown corundum (of which Al 2 o 3 ≥94%) particles 55% (particle size 3-1mm), silicon carbide particles (powder) 15% (particle size 1-0mm10%, particle size 325 mesh 5%); kyanite powder 2% (particle size 180 mesh); Guangxi soil 2 % (particle size ≤ 200 mesh); ferrosilicon nitride 4% (particle size 325 mesh); active α-Al 2 o 3 Powder 7% (particle size 50μm); silicon micropowder 4% (particle size 1μm); metallic silicon powder 1% (particle size 200 mesh); spherical asphalt + earthy graphite 3% (particle size 200 mesh); pure calcium aluminate cement 7% (Particle size 55μm).

[0016] After the above-mentioned refractory raw materials are mixed evenly in proportion, when using a professional gunning machine to repair the lining of the torpedo tank, add about 12% of water. The gunning lining has well protected the refractory brick lining in the slag line area of ​​...

Embodiment 2

[0018] The torpedo tank lining repair gunning material of the present invention is made of raw material brown corundum (wherein Al 2 o 3 ≥94%) particles 48% (particle size 3-1mm), silicon carbide particles (powder) 18% (particle size 1-0mm12%, particle size 325 mesh 6%); kyanite powder 2% (particle size 180 mesh); Guangxi soil 3 % (particle size ≤ 200 mesh); ferrosilicon nitride 5% (particle size 325 mesh); active α-Al 2 o 3 Powder 8% (particle size 50μm); silicon micropowder 4% (particle size 1μm); metal silicon powder 1% (particle size 200 mesh); spherical asphalt + earthy graphite 4% (particle size 200 mesh); pure calcium aluminate cement 7% (Particle size 55μm).

[0019] After the above-mentioned refractory raw materials are mixed evenly in proportion, when using a professional gunning machine to repair the inner lining of the torpedo tank, add about 11% of water. The gunning lining has well protected the refractory brick lining in the slag line area of ​​the Shouqin 2...

Embodiment 3

[0020] Example 3: Brown corundum particles 45%, silicon carbide particles (powder) 18%; kyanite powder 4%; Guangxi soil 2%; ferrosilicon nitride 2%; active α-Al 2 o 3 10% powder; 3% silica powder; 2% metallic silicon powder; 4% spherical asphalt + earthy graphite; 10% pure calcium aluminate cement.

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PUM

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Abstract

The invention relates to a torpedo ladle lining repair gunning mix, belonging to the technical field of torpedo ladles for transporting molten iron. The torpedo ladle lining repair gunning mix comprises the following components in percentage by weight: 45-60% of brown fused alumina particle, 10-20% of silicon carbide particle, 1-5% of kyanite powder, 1-5% of Gangxi earth, 1-10% of active alpha-Al2O3 powder, 1-7% of silicon micropowder, 1-5% of metallic silicon powder, 0-5% of ball pitch, 0-5% of amorphous graphite and 2-10% of pure calcium aluminate cement. The raw materials are weighed according to the particle sizes and proportions and uniformly mixed in a mixer. The torpedo ladle lining repair gunning mix has favorable refractoriness, oxidation resistance and slag iron permeation and corrosion resistance at the torpedo ladle service temperature of 1400-1530 DEG C.

Description

technical field [0001] The invention belongs to the technical field of torpedo tanks for transporting molten iron, and in particular relates to a torpedo tank lining repair gunning material. It is a lining repair gunning material to slow down the erosion speed of the brick lining and improve the service life of the torpedo tank. Background technique [0002] The torpedo tank is one of the main thermal equipment for the transportation of molten iron between the ironmaking blast furnace and the steelmaking converter. It has the advantages of large capacity of molten iron and lower temperature of molten iron, and is widely used. The operation cycle is longer, about 10 to 16 months. During the long-term operation, the refractory lining of the torpedo tank is subject to slag, iron erosion, oxidation and seepage erosion, etc., and local or large areas are damaged, which affects its safe operation and service life. The refractory material overhaul and masonry maintenance of the t...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 刘国友王效东童大志温太阳祝少军李志毅
Owner SHOUGANG CORPORATION
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