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Preparation method of unfired Al-Al2O3 carbon-free composite sliding plate

A technology of carbon composite and sliding plate, which is applied in the field of refractory materials, can solve the problems of long-term storage of products, reduce production costs, and difficulties in industrial production, and achieve good hydration resistance, reduce production costs, and excellent physical performance indicators.

Active Publication Date: 2014-12-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to prepare a non-burning Al-Al that does not require high-temperature firing and oil immersion 2 o 3 Carbon-free composite slide, which not only overcomes the large amount of AlN, Al contained in existing slide materials 4 C 3 The products are seriously hydrated at room temperature, and the products cannot be stored for a long time, which makes the industrial production of the products very difficult; the production process is simplified and the production cost is greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: A non-burning Al-Al 2 O 3 The preparation method of the carbonless composite sliding plate, in terms of weight percentage, the raw material composition is: 82% of corundum, 15% of activated alumina, 3% of metal aluminum powder, and 3.5% of thermosetting phenolic resin.

[0019] During production, various raw materials are first weighed according to the proportions, mixed evenly, and then kneaded to obtain mud, which is then pressed and formed by a friction press, and dried at 120-600 ° C for 9 hours; The product of the present invention is made.

[0020] The powder is metal Al powder with a particle size of less than 325 mesh, activated alumina and part of corundum, and the aggregate is corundum with a particle size of 3-1mm and 1-0.1mm; the above-mentioned corundum is divided into tabular corundum and white corundum.

[0021] The performance index of the obtained product is: apparent porosity 3.8%, bulk density 3.35g / cm 3 , The compressive strength at roo...

Embodiment 2

[0022] Embodiment 2: the production technique is the same as that of embodiment 1, and the difference is:

[0023] By weight percentage, the raw material composition is: 82% corundum, 12% activated alumina, 6% metal aluminum powder, and 3.5% thermosetting phenolic resin. The performance index of the obtained product is: apparent porosity 3.9%, bulk density 3.32g / cm 3 , The room temperature compressive strength is 190MPa, the high temperature flexural strength is 61MPa, and its thermal shock resistance, erosion resistance, oxidation resistance and hydration resistance are all good.

Embodiment 3

[0024] Embodiment 3: the production technique is the same as that of embodiment 1, and the difference is:

[0025] By weight percentage, the raw material composition is: 82% corundum, 9% activated alumina, 9% metal aluminum powder, and 3.5% thermosetting phenolic resin. The performance index of the obtained product is: apparent porosity 4.2%, bulk density 3.28g / cm 3 , The compressive strength at room temperature is 187MPa, and the high temperature flexural strength is 50MPa. Its thermal shock resistance, erosion resistance, oxidation resistance and hydration resistance are all good.

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Abstract

The invention relates to an unfired Al-Al2O3 carbon-free composite sliding plate and a preparation method thereof, belonging to the field of refractory materials. The sliding plate is prepared from 57-87% of corundum, 2-25% of active aluminum oxide and 1-20% of metal Al as well as binder phenolic resin accounting for 2-6% of the total amount of the raw materials. The preparation method comprises the following steps: proportionally weighing various raw materials, evenly mixing, compounding to obtain paste, carrying out pressure molding, and drying at 120-600 DEG C for 5-25 hours. The product has metal-nonmetal combined structure; and the apparent porosity is 3-10%, the volume density is 3.05-3.40 g / cm<3>, the ambient compressive strength is 100-250 MPa, and the high-temperature folding strength is 10-70 MPa. The product does not need high-temperature firing or oil impregnation, and has the advantage of low production cost; the used raw materials have high chemical stability and low oxygen potential, are free of carbon and easily hydrated Al4C3, and do not have secondary pollution of C, O, H and other impurities; and the product has excellent thermal shock resistance.

Description

technical field [0001] The invention relates to the preparation of a sliding plate for steel-making continuous casting, in particular to a non-burning Al-Al for clean steel continuous casting 2 O 3 A carbon-free composite sliding plate and a preparation method thereof belong to the field of refractory materials. Background technique [0002] Clean steel is an important variety of high-quality steel, which has developed rapidly in recent years. Regarding clean steel, it is generally believed that clean steel refers to the steel type that strictly controls the non-metallic inclusions (mainly oxides and sulfides) in the steel. This mainly includes: low total oxygen content in steel, small number of non-metallic inclusions, small size, uniform distribution, less brittle inclusions and suitable inclusion shape, impurity elements in steel generally refer to C, S, P, N , H, O. Therefore, the refractory materials for smelting clean steel must meet the requirements that C, S, P, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 李勇张军杰
Owner UNIV OF SCI & TECH BEIJING
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