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Al2O3-ZrO2-Al composite sliding board containing ZrO and preparation method

A sliding plate and bonding agent technology, applied in the field of refractory materials, can solve the problems of inability to adapt to clean steel production, high carbon content of aluminum-zirconium-carbon sliding plates, etc.

Inactive Publication Date: 2020-10-30
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the aluminum-zirconium-carbon slide plate has a high carbon content and cannot adapt to the production of clean steel, the present invention substitutes metal aluminum for carbon to prepare an Al 2 o 3 -ZrO 2 -Al composite slide, which contains non-oxide ZrO, which makes the material have excellent oxidation resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: A kind of Al containing ZrO 2 O 3 -ZrO 2 -The preparation method of Al composite sliding plate, in terms of weight percentage, the raw material composition is: 89% corundum (1-2mm 20%, 0.5-1mm 10%, 0-0.5mm 59%), 3% ZrO 2 , 8% of metal aluminum powder, plus 3% of thermosetting phenolic resin.

[0019] During production, various raw materials are first weighed according to the proportions, mixed evenly, and kneaded to obtain mud, which is then pressed and formed by a friction press, dried at 120-500 °C for 24 hours, and then fired in a high-temperature nitrogen atmosphere at 1300 °C.

[0020] The powder is ZrO with a particle size smaller than 325 meshes 2 , metal aluminum powder and part of corundum, the aggregate is corundum with a particle size of 1-2mm and 0.1-1mm; the above-mentioned corundum is tabular corundum.

[0021] The performance index of the obtained product is: apparent porosity 9.1%, bulk density 3.24g / 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: 86% corundum (1-2mm 20%, 0.5-1mm 10%, 0-0.5mm 56%), 6% ZrO 2 , 8% of metal aluminum powder, plus 3% of thermosetting phenolic resin. The performance index of the obtained product is: apparent porosity 11.9%, bulk density 3.18g / cm 3 , The compressive strength at room temperature is 75.2MPa, 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: 83% corundum (1-2mm 20%, 0.5-1mm 10%, 0-0.5mm 53%), 9% ZrO 2 , 8% of metal aluminum powder, plus 3% of thermosetting phenolic resin. The performance index of the obtained product is: apparent porosity 10.6%, bulk density 3.32 / cm 3 , The compressive strength at room temperature is 164MPa, and its thermal shock resistance, erosion resistance, oxidation resistance and hydration resistance are all good.

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Abstract

The invention relates to an Al2O3-ZrO2-Al composite sliding board containing ZrO and a preparation method thereof and belongs to the field of fire-resisting materials. Raw material compositions of thesliding board comprise, by weight percentage, 65-90% of corundum, 3-20% of ZrO2, 4-15% of metal aluminum powder, and phenolic resin accounting for 2-6% of the total amount of the raw materials as a binding agent. During production, all the raw materials are weighed according to the ratio and mixed uniformly, the raw materials are subjected to mixing to obtain batch, the batch is pressed and formed, drying is carried out for 10-30 h at the temperature of 120 DEG C-500 DEG C, and then sintering is carried out at a high temperature of 1000-1600 DEG C. The product is provided with an oxide and non-oxide composite structure and has excellent physical performance, the apparent porosity is 6-14%, the volume density is 2.9-3.6 g / cm3, and the normal-temperature pressure resisting strength is 70-250 MPa. The product can replace a traditional aluminum zirconium carbon sliding plate, carbon pollution to molten steel is avoided, and the product containing ZrO phases has good oxidation resisting performance.

Description

technical field [0001] The invention relates to the preparation of a sliding plate for steelmaking and continuous casting, in particular to a ZrO-containing Al 2 O 3 -ZrO 2 -Al composite sliding plate and a preparation method thereof belong to the field of refractory materials. Background technique [0002] The sliding plate is the key part of the sliding nozzle, which is used to control the flow and velocity of molten steel. It requires the refractory used to have good corrosion resistance and erosion resistance; excellent thermal shock resistance and high wear resistance; excellent oxidation resistance. At present, aluminum-carbon and aluminum-zirconium-carbon are mainly used in large and medium-sized ladle. Aluminum zirconium carbon refractory materials are mainly to meet the requirements of multi-furnace continuous casting in the continuous casting process, and to solve the problem of aluminum carbon materials due to the increase in strength and the decrease in therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/28B22F3/02B22F3/10C22C29/12C04B35/66C04B35/482C04B35/622C04B35/64C04B35/634
CPCB22D41/28B22F3/02B22F3/1007C04B35/482C04B35/622C04B35/63476C04B35/64C04B2235/3217C04B2235/3244C04B2235/402C04B2235/658C04B2235/9607C04B2235/9676C22C29/005C22C29/12
Inventor 李勇郑清瑶李宏宇
Owner UNIV OF SCI & TECH BEIJING