Microporous corundum brick and its preparation method

A corundum brick and microporous technology, applied in the field of refractory materials, can solve the problems of not having microporosity, alkali resistance and slag resistance inferior to imported bricks, etc., and achieve good microporous index effect

Inactive Publication Date: 2004-11-17
武钢集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the best quality of this type of brick is the French ceramic cup brick. Although many manufacturers in China are also developing and producing this kind of refractory brick, they are far inferior to imported bricks because of their alkali resistance and slag resistance. It does not have microporosity, so that many domestic companies have to pay a higher price to buy French ceramic cup bricks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The present embodiment adopts following proportioning and process step to realize:

[0017] a. Grinding dense corundum into (total weight ratio) 30% of particle size 0.1-3mm, 10% of particle size <320 mesh; crushing brown corundum into particles with particle size of 1-3mm; crushing mullite into fine powder with particle size <320 mesh ;Metal silicon is crushed into fine powder with a particle size of <320 mesh; silicon carbide is crushed into fine powder with a particle size of <200 mesh; aluminum oxide is crushed into a fine powder with a particle size of <600 mesh;

[0018] b. According to the weight ratio, take 30% of dense corundum with a particle size ≥0.1mm and 32% of brown corundum as aggregates for 3 minutes of mixing and grinding, then add 3% resin resin for 4 minutes of mixing, and then mix 10% of dense corundum with a particle size of less than 0.1mm, Mullite 7%, metal silicon 6%, silicon carbide 8%, aluminum oxide (α-AL 2 o 3 ) 4% fine powder for co-grind...

Embodiment 2

[0022] The present embodiment adopts following proportioning and process step to realize:

[0023] a. Grinding dense corundum into (total weight ratio) 27% of particle size 0.1-3mm, 13% of particle size <320 mesh; crushing brown corundum into particles of 1-3mm particle size; crushing mullite into fine powder of particle size <320 mesh ;Metal silicon is crushed into fine powder with a particle size of <320 mesh; silicon carbide is crushed into fine powder with a particle size of <200 mesh; aluminum oxide is crushed into a fine powder with a particle size of <600 mesh;

[0024] b. According to the weight ratio, take 27% of dense corundum with a particle size of ≥0.1mm and 28% of brown corundum as aggregates, and mix and grind for 2 minutes, then add 5% resin and mix and grind for 5 minutes, and then mix 13% of dense corundum with a particle size of 2 o 3 ) 3% fine powder for co-grinding, then add the co-milled fine powder for 10 minutes of mixing and milling, the total mixing a...

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Abstract

The invention relates to a kind of micropore corundum brick and its preparation method. Its composition comprises (wt%) compact corundum 30-50%, mullite 5-10%, brown corundum 20-40%, metal silicone 5-10%, silicone carbide 5-15%, alpha-Al2O3 2-8% and resin 3-6%. Said product can meet the requirements for long-life of blast furnace, can be used as ceramic ring of hearth region of blast furnace, including blast tuyere, tap and slag notch combined brick, can be matched with moulded small carbon brick for blocking hearth lining, also can be matched with large-micropore carbon brick to block hearth brick lining.

Description

(1) Technical field [0001] The invention relates to a refractory material, in particular to a microporous corundum brick suitable for a blast furnace hearth area, including a blast furnace bottom, a furnace wall, a tuyere, an iron port and a slag port, and a preparation method thereof. (2) Background technology [0002] Microporous corundum bricks are widely used in blast furnace hearths as ceramic cup bricks because of their good alkali resistance, slag resistance and iron corrosion resistance. At present, the best quality of this type of brick is the French ceramic cup brick. Although many manufacturers in China are also developing and producing this kind of refractory brick, they are far inferior to imported bricks because of their alkali resistance and slag resistance. It does not have microporosity, so that many domestic companies have to pay a higher price to buy French ceramic cup bricks. (3) Contents of the invention [0003] The purpose of the present invention i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/18C04B35/622C04B35/634C04B35/64C04B35/66
Inventor 张建武赵永安校松波刘志鹏丁权波
Owner 武钢集团有限公司
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