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Plastic phase material for sealing blast furnace cooling wall and hearth carbon brick

A technology for cooling staves and sealing, which is applied to blast furnaces, cooling devices, and details of blast furnaces. It can solve the problems of high local temperature in inversions, affecting the safe operation of blast furnaces, and reducing cooling effects, etc., so as to improve sealing performance, good plasticity, and facilitate construction. Effect

Active Publication Date: 2022-05-24
BEIJING RUIPU TONGCHUANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the actual production operation, due to the blast furnace lining being subjected to high temperature erosion, hot and cold reciprocating cycles, and various erosions, the carbon bricks around the hearth are gradually eroded and reduced, resulting in an air gap between the stave and the hearth carbon bricks, reducing the cooling effect. Inverted local temperature is too high, affecting the safe operation of the blast furnace

Method used

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  • Plastic phase material for sealing blast furnace cooling wall and hearth carbon brick
  • Plastic phase material for sealing blast furnace cooling wall and hearth carbon brick
  • Plastic phase material for sealing blast furnace cooling wall and hearth carbon brick

Examples

Experimental program
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Effect test

preparation example 1

[0031] For the preparation of additives, according to the number of parts by weight, take 4 parts of ferrocene, 3 parts of hexamethyltetraamine, 1 part of titanium dioxide, 1 part of metal aluminum powder, 8 parts of carboxymethyl cellulose and add them to the mixer for stirring, and the mixing speed is 800r / min. Among them, TiO 2 The content ≥ 98wt%, the particle size ≤ 0.074mm. The metal aluminum powder is spherical atomized metal aluminum, its Al content ≥ 99wt%, and the particle size is 0.045mm~0.074mm.

preparation example 2-10

[0033] Preparation Examples 2-10 provide additives, and the difference with preparation 1 is that the components and contents of each additive are different, as shown in Table 1.

[0034] Table 1 Preparation examples 1-10 of the components and content of each additive

[0035]

[0036]

[0037] where " / " indicates that no additions were added.

Embodiment 1

[0040] Plastic phase materials for blast furnace cylinder cooling wall and carbon brick sealing are prepared by the following preparation methods:

[0041] In the carbon material 30 parts, silicon carbide 20 parts, metal powder 5 parts and additives 2 parts of the mixture of 20 parts of carbon binder, and then mixed to form a plastic phase material.

[0042] Among them, the carbon material includes a mixture of petroleum coke powder and graphite with a weight ratio of 7:3, and the particle size of petroleum coke powder and graphite is less than 100 mesh, and the carbon content is more than 99%. Silicon carbide is a silicon carbide micropowder with a SiC content of ≥98wt% and a particle size of ≤ 0.005mm. The metal powder is a metallic copper powder with a fineness of 2 μm. The additive is selected from the additive prepared in Example 1. Carbon-containing binders include asphalt and carbon-containing thermoplastic phenolic resins, the weight ratio of the asphalt and thermoplastic ...

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Abstract

The invention relates to the technical field of blast furnace hearth sealing, and particularly discloses a plastic phase material for sealing a blast furnace cooling wall and a hearth carbon brick, the plastic phase material comprises, by weight, 30-50 parts of a carbon material, 20-40 parts of silicon carbide, 5-15 parts of metal powder, 2-5 parts of an additive, and 20-30 parts of a carbon-containing binder. The method has the advantage that the sealing and heat-conducting properties between the cooling wall and the hearth carbon bricks are enhanced.

Description

Technical field [0001] The present application relates to the field of blast furnace cylinder sealing, specifically related to the blast furnace cooling wall and the plastic phase material for the sealing of the furnace cylinder carbon brick. Background [0002] In the blast furnace ironmaking pig iron process, often accompanied by a large number of cooling operations, of which, the blast furnace waist, furnace belly in the blast furnace slag iron and heat flow serious impact of the high heat load area, so the outside of the carbon brick in this area is generally provided with a cooling wall and water cooling pipe, the water cooling pipe is located between the cooling wall and the carbon brick, the water cooling pipe and the cooling wall to achieve the cooling heat exchange of the blast furnace, the temperature between the cooling wall and the furnace cylinder carbon brick is about 30 ~ 150 ° C. [0003] In actual production operations, due to the high temperature erosion, cold a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/10C21B7/04
CPCC21B7/10C21B7/04Y02P10/20
Inventor 王小军杨林李卫华张君博
Owner BEIJING RUIPU TONGCHUANG TECH DEV
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