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Zr4+ ion doped CA6-based refractory material and preparation method thereof

A refractory material and ion doping technology, applied in the field of inorganic non-metallic materials, can solve problems such as cracking, reduced material performance, and unrealized Zr4+ effective doping, and achieves no pollution to the environment, low porosity, atmosphere and synthesis temperature less demanding effect

Pending Publication Date: 2021-05-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently about ZrO 2 Enhanced CA as an additive 6 In the material performance report, due to the doping amount and the selection of experimental conditions, ZrO 2 They all exist in the form of composite materials, and Zr has not been realized 4+ effective doping
This makes the related materials easy to dissolve with ZrO during service at variable temperatures 2 Cracking occurs due to the phase change of the material, reducing the performance of the material

Method used

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  • Zr4+ ion doped CA6-based refractory material and preparation method thereof
  • Zr4+ ion doped CA6-based refractory material and preparation method thereof
  • Zr4+ ion doped CA6-based refractory material and preparation method thereof

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preparation example Construction

[0040] A kind of Zr provided by the invention 4+ ion-doped CA 6 The preparation method of base refractory material, see figure 1 , including the following steps:

[0041] S100, ball milling alumina powder, calcium hydroxide powder and zirconia powder in a mass ratio of (90-270):(15-45):1 to obtain a mixture;

[0042] S200, sequentially grinding and sieving the mixed material, and then pressing it into a billet;

[0043] S300. Put the billet into a high-temperature box furnace, keep it warm at 1600°C-1700°C for 2-6h in an air atmosphere, and then cool it with the furnace to obtain Zr 4+ ion-doped CA 6 base refractory material.

[0044] a Zr 4+ ion-doped CA 6 based refractories, including through Zr as described above 4+ ion-doped CA 6 CA based refractory preparation method 6 base refractory material.

[0045] A kind of Zr provided by the invention 4+ ion-doped CA 6 Material and its preparation method, by introducing Zr 4+ to improve CA 6 material properties can b...

Embodiment 1

[0058] a Zr 4+ ion-doped CA 6 The preparation method of base refractory material comprises:

[0059] (1) Raw material treatment: Alumina powder with an average particle size of 2 μm, calcium hydroxide powder with an average particle size of 2 μm, and zirconia powder with an average particle size of 100 nm were respectively incubated at 400° C. for 6 hours to remove free water and bound water in the raw materials. Wherein, the alumina powder is α-alumina powder.

[0060] (2) Ball milling and mixing: mix the treated alumina powder, calcium hydroxide powder and zirconia powder in a mass ratio of 270:45:1 and put them into a grinding tank, and use absolute ethanol as a medium to adopt a wet ball milling method. Among them, the mass ratio of balls: mixed powder: absolute ethanol is 5:2:1; the ball milling speed is controlled at 250rpm / min, and the ball milling is carried out for 12 hours to make the raw materials evenly mixed, and then the mixed slurry is quickly dried to avoid s...

Embodiment 2

[0064] a Zr 4+ ion-doped CA 6 The preparation method of base refractory material comprises:

[0065] (1) Raw material treatment: Alumina powder with an average particle size of 4 μm, calcium hydroxide powder with an average particle size of 6 μm, and zirconia powder with an average particle size of 200 nm were respectively incubated at 500° C. for 5 hours to remove free water and bound water in the raw materials.

[0066] (2) Ball milling and mixing: mix the treated alumina powder, calcium hydroxide powder and zirconia powder in a mass ratio of 180:30:1 and put them into a grinding tank, and use absolute ethanol as a medium to adopt a wet ball milling method. Among them, the mass ratio of balls: mixed powder: anhydrous ethanol is 6:1:2; the ball milling speed is controlled at 200rpm / min, and the ball milling is carried out for 24 hours to make the raw materials evenly mixed, and then the mixed slurry is quickly dried to avoid stratification.

[0067] (3) Billet preparation: ...

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Abstract

The invention discloses a Zr4+ ion doped CA6-based refractory material and a preparation method thereof. The preparation method comprises the steps of: enabling aluminum oxide powder, calcium hydroxide powder and zirconium oxide powder to be subjected to ball milling according to the mass ratio of (90-270):(15-45):1, and obtaining a mixed material; sequentially grinding and screening the mixed material, and then pressing the mixed material into a blank; and sintering the blank in an air atmosphere to obtain the Zr4+ ion doped CA6-based refractory material. According to the preparation method, high-activity nano ZrO2, Ca(OH)2 and Al2O3 powder are adopted as raw materials, and the additive amount and synthesis conditions of ZrO2 are optimized through theoretical simulation, so that the CA6-based refractory material which is doped with Zr4+ ions and is compact and excellent in slag corrosion resistance can be obtained while the synthesis temperature is reduced.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, in particular to a Zr 4+ ion-doped CA 6 Base refractory material and its preparation method. Background technique [0002] High-quality steel is of great significance to guaranteeing the construction of major national projects, improving the level of equipment manufacturing, promoting energy conservation and emission reduction, and technological upgrading in related application fields, and has become a key development target of the iron and steel industry. In recent years, in order to improve steel quality and improve smelting efficiency, the proportion of out-of-furnace refining and alloying processes in the steelmaking process has increased, which has gradually increased the performance requirements for refractory materials used in ladles. Therefore, improving the performance of existing materials or developing new high-performance materials has become one of the main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/66C04B35/622
CPCC04B35/44C04B35/622C04B35/66C04B2235/3208C04B2235/3217C04B2235/3244C04B2235/5436C04B2235/5445C04B2235/656C04B2235/6567C04B2235/6583C04B2235/9669
Inventor 王恩会侯新梅郭春雨刘云松康俊一杨涛杨树峰
Owner UNIV OF SCI & TECH BEIJING
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