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Single iron-port blast furnace tapping main channel and making technique thereof

A blast furnace tapping and tapping technology, which is applied in the field of refractory materials for ironmaking, can solve the problems of frequent repairs, large harmful smoke and dust, and deteriorate the working environment, so as to reduce maintenance workload and material consumption, stabilize and uniform quality, and reduce repairs The effect of frequency

Active Publication Date: 2010-11-17
CHANGXING MINGTIAN FURNACE CHARGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of iron ditch lining is exposed to the air after the iron is tapped. It is severely oxidized by rapid cooling and heat and air, and its structure is loose and not resistant to erosion. Generally, it can only be used for 3-5 days, resulting in frequent repairs and high labor intensity for workers. High refractory consumption
Moreover, because the ramming material contains resin, asphalt and other components, a large amount of harmful smoke and dust will be generated during use, which will deteriorate the working environment in front of the furnace.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The main tapping channel of a single taphole blast furnace includes a poured permanent layer and a poured working layer. The working layer is divided into a lower iron line part and an upper slag line part. The lower iron line part is made of iron wire material, and the upper slag line part Made of slag wire.

[0018] The permanent layer of the main ditch adopts the on-site integral casting molding process to ensure the integrity and strength of the entire main ditch, which can effectively prevent iron leakage after the working layer is burned through, and makes the maintenance and replacement of the main ditch convenient and economical. Only the working layer needs to be maintained and replaced .

[0019] The working layer of the main ditch adopts the on-site integral casting molding process to ensure the integrity and strength of the working layer. The texture of the entire working layer is uniform and compact, so that the high-temperature working performance of the r...

Embodiment 2

[0031] In this example, the mass percentage of each component in the slag strand is: brown corundum or dense corundum: 37%, 98 silicon carbide: 39%, white corundum: 6%, α-Al 2 o 3 : 7%, silica powder: 1.5%, pure calcium aluminate cement: 3%, spherical asphalt: 3%, composite additives: 3.5%. Among them, the composite additive includes the following components and the mass percentage of each component is: water reducer: 2%-5%, retarder: 2%-5%, high-efficiency dispersant: 2%-5%, explosion-proof agent: 55% %-65%, antioxidant: 28%-36%.

[0032] The mass percentage of each component in the iron wire material is: brown corundum or dense corundum: 58%, 98 silicon carbide: 16%, white corundum: 9%, α-Al 2 o 3 : 6%, silica powder: 1.5%, pure calcium aluminate cement: 3%, spherical asphalt: 3%, composite additives: 3.5%. Among them, the composite additive includes the following components and the mass percentage of each component is: water reducer: 2%-5%, retarder: 2%-5%, high-efficie...

Embodiment 3

[0034] In this example, the mass percentages of each component in the slag strand are: brown corundum or dense corundum: 41%, 98 silicon carbide: 35%, white corundum: 7%, α-Al 2 o 3 : 6%, silica powder: 1.5%, pure calcium aluminate cement: 3%, spherical asphalt: 3%, composite additives: 3.5%. Among them, the composite additive includes the following components and the mass percentage of each component is: water reducer: 2%-5%, retarder: 2%-5%, high-efficiency dispersant: 2%-5%, explosion-proof agent: 55% %-65%, antioxidant: 28%-36%.

[0035] The mass percentage of each component in the iron wire material is: brown corundum or dense corundum: 54%, 98 silicon carbide: 20%, white corundum: 8%, α-Al 2 o 3 : 7%, silica powder: 1.5%, pure calcium aluminate cement: 3%, spherical asphalt: 3%, composite additives: 3.5%. Among them, the composite additive includes the following components and the mass percentage of each component is: water reducer: 2%-5%, retarder: 2%-5%, high-effic...

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Abstract

The invention discloses a single iron-port blast furnace tapping main channel and a making technique thereof, comprising a cast permanent layer and a cast working layer. The working layer is divided into a lower iron wire part and an upper slag wire part; the lower iron wire part is made by adopting an iron wire material; and the upper slag wire part is made by adopting a slag wire material. In the invention, the cast working layer and the cast permanent layer are adopted; and different materials are adopted for different parts of the working layer, thus ensuring the consistency of the entireabrasion degree of the working layer and reducing material waste. The high temperature performances of the cast materials are far better than that of ramming materials, thus greatly prolonging the service life of the main channel, reducing the repair frequency as well as reducing the maintenance workload and the material consumption. The casting construction quality is stable and uniform; the problems of inconsistent density and loose structure of the ramming construction do not exist; and the service life of the main channel is effectively prolonged.

Description

【Technical field】 [0001] The invention relates to the technical field of refractory materials for ironmaking, in particular to a main tapping channel of a single taphole blast furnace and a manufacturing process thereof. 【Background technique】 [0002] At present, more than half of my country's steel production capacity still comes from 1000m 3 The following blast furnaces, quite a few of them are single-taphole blast furnaces. Since there is no spare tapping channel, it is difficult to provide sufficient time guarantee for the construction and maintenance of the main tapping channel. The tapping channel of this type of blast furnace is more mature in the application of multi-taphole blast furnaces And the material and process of advanced integral casting are 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 o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/14C04B35/66
CPCY02P10/20
Inventor 佘成明
Owner CHANGXING MINGTIAN FURNACE CHARGE
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