Single iron-port blast furnace tapping main channel gunning material and gunning technology

A blast furnace tapping and gunning technology, which is applied in the field of refractory materials for iron making, can solve the problems of long time required and affect the normal production rhythm of blast furnaces, and achieves the effects of good use performance, flexible and fast construction, and good high temperature performance.

Inactive Publication Date: 2009-10-14
畲成明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the iron storage type main ditch poured with castables needs to be poured, maintained, and baked after cleaning the main ditch during construction and maintenance, which takes a long time, and there is no spare iron ditch for the single iron port, which will affect the blast furnace. Normal production rhythm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The raw material ratio of the gunning material used is: brown corundum or dense corundum 48%, 98 silicon carbide 28%, white corundum 7%, α-Al 2 o 3 8%, silica powder 1.5%, pure calcium aluminate cement 2.5%, spherical asphalt 2%, composite additive 3%.

[0016] The gunning material proposed by the present invention adopts brown corundum or dense corundum, silicon carbide and white corundum as aggregate and powder, and uses its high melting point, high strength, high chemical stability and high thermal conductivity to make the new material have excellent High temperature resistance, erosion resistance, erosion resistance, thermal shock resistance and other properties. The powdery material in dense corundum or brown corundum accounts for about 60%, and the powdery material in silicon carbide accounts for about 60%. The maximum particle size is controlled below 5mm, and the particle gradation is 3-4, so that the material has good construction and work performance. Add α...

Embodiment 2

[0020] Brown corundum or dense corundum: 46%, 98 silicon carbide: 30%, white corundum: 8%, α-Al 2 o 3 : 7%, silica powder: 1.5%, pure calcium aluminate cement: 2.5%, spherical asphalt: 2%, composite additives: 3%.

Embodiment 3

[0022] Brown corundum or dense corundum: 47%, 98 silicon carbide: 26%, white corundum: 9%, α-Al 2 o 3 : 9%, silica powder: 1.5%, pure calcium aluminate cement: 2.5%, spherical asphalt: 2%, composite additives: 3%.

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PUM

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Abstract

The invention discloses a single iron-port blast furnace tapping main channel gunning material and a gunning technology, comprising the components with the weight percentages as follows: 44 to 52 percent of brown aluminum oxide or dense aluminum oxide, 24 to 32 percent of 98 silicon carbide, 6 to 12 percent of white aluminum oxide, 6 to 12 percent of Alpha-Al2O3, 1 to 3 percent of silicon powder, 1 to 4 percent of pure calcium aluminate cement, 1 to 4 percent of spherical asphaltum, and 1.5 to 3.5 percent of complex additive. The gunning material is prepared according to the material mixture ratio; compressed air is connected to a gunning machine; the gunning machine is connected with a hose used for a sponging gun; the sponging gun is connected with a tap water pipe and a regulating valve; the inner diameter of the sponging gun is about 4-6cm; the pressure of the compressed air is controlled to be about 0.7MPa; the gunning material is added; the compressed air is used for spraying the gunning material and water mixed in the sponging gun to the part of the tapping main channel needing to be gunned; and the water pressure can be regulated by the water valve on the sponging gun during gunning. The single iron-port blast furnace tapping main channel gunning material and the gunning technology not only can ensure the performances of erosion resistance, oxidization resistance and slag attack resistance and the like after repair, but also can be quickly executed to ensure the smooth use of the single iron-port blast furnace tapping main channel after improvement.

Description

【Technical field】 [0001] The invention relates to the technical field of refractory materials for ironmaking, in particular to a gunning material and a gunning process for a single tap hole blast furnace main ditch. 【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 material and repa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C21B7/14
Inventor 佘成明
Owner 畲成明
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