Nozzle as well as preparation method and application thereof

A nozzle and yttrium oxide technology, which is applied in the field of refractory materials, can solve problems such as short service life, low production efficiency, and separation and reunion, and achieve the effects of alleviating thermal stress, reducing waste of resources, and reducing production costs

Active Publication Date: 2021-11-26
中科南京绿色制造产业创新研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But ZrO 2 -Al 2 o 3 Separation and agglomeration caused by gel, low production efficiency and Al 2 o 3 Easy to react with contact slag to form metamorphic layer, resulting in short service life

Method used

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  • Nozzle as well as preparation method and application thereof
  • Nozzle as well as preparation method and application thereof
  • Nozzle as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This embodiment provides a method for preparing a nozzle, the preparation method comprising the following steps:

[0058] (1) Mix water-based epoxy resin (Shell, EP-815) with a particle size not exceeding 5 μm, D 90 Yttria-stabilized zirconia powder of 3.5 μm (scanning electron microscope picture see figure 1 ), spray granulation to obtain a particle size range of 34-88 μm, D 50 Spherical powder of 55 μm (scanning electron microscope picture see figure 2 ); the yttria-stabilized zirconia powder is obtained by crushing, magnetically separating, pickling and drying the zirconia-containing raw material; the zirconia-containing raw material is post-use waste of 3C products;

[0059] (2) mixing thermosetting phenolic resin (Leixiang Chemical Factory, Erqi District, Zhengzhou City, FQ-6) and the spherical powder obtained in step (1), under pressure molding at 250MPa, to obtain Huangpi;

[0060] (3) 120°C to dry the barley obtained in step (2), the drying time is 12h; then...

Embodiment 2

[0062] This embodiment provides a method for preparing a nozzle, the preparation method comprising the following steps:

[0063] (1) Mix water-based epoxy resin (Momentive / Hexion, 3520) with a particle size not exceeding 5 μm, D 90 Yttria-stabilized zirconia powder with a size of 3 μm, spray granulated to obtain a particle size range of 34-88 μm, D 50 It is a spherical powder of 60 μm; the yttria-stabilized zirconia powder is obtained from raw materials containing zirconia through crushing, magnetic separation, pickling and drying; the raw materials containing zirconia are post-use waste of medical devices;

[0064] (2) mixing thermosetting phenolic resin (Leixiang Chemical Factory, Erqi District, Zhengzhou City, FQ-6) and the spherical powder obtained in step (1), under pressure molding at 200MPa, to obtain Huangpi;

[0065] (3) 150°C to dry the barley obtained in step (2), the drying time is 10h; then raise the temperature to 1160°C at a rate of 1.8°C / min, then raise the te...

Embodiment 3

[0067] This embodiment provides a method for preparing a nozzle, the preparation method comprising the following steps:

[0068] (1) Mix water-based epoxy resin (Momentive / Hexion, 3520) with a particle size not exceeding 5 μm, D 90 Yttria-stabilized zirconia powder is 4μm, spray granulated, and the particle size range is 34-88μm, D 50 It is a spherical powder of 50 μm; the yttria-stabilized zirconia powder is obtained by crushing, magnetically separating, pickling and drying the zirconia-containing raw material; the zirconia-containing raw material is used waste of ceramic knives;

[0069] (2) mixing phenolic resin (Leixiang Chemical Factory, Erqi District, Zhengzhou City, FQ-6) with the spherical powder obtained in step (1), and molding under 300MPa pressure to obtain Huangpi;

[0070] (3) 100°C drying of the barley obtained in step (2), the drying time is 16h; then the temperature is raised to 1140°C at a rate of 2.2°C / min, and then the temperature is raised to 1210°C at a ...

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Abstract

The invention provides a nozzle and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a binder and yttria-stabilized zirconia powder with the particle size of not more than 5 [mu]m, and granulating to obtain spherical powder; (2) mixing the binder with the spherical powder obtained in the step (1), and molding to obtain a blank; and (3) carrying out heat treatment on the blank obtained in the step (2) to obtain the nozzle. The yttria-stabilized zirconium oxide powder is adopted, is different from magnesium oxide-stabilized zirconium oxide powder, and has the cost advantage and stable physical and chemical properties; waste materials of zirconium oxide products such as 3C products, medical instruments or ceramic cutters are used as sources for preparing raw materials, so that resource waste is reduced, and the production cost is reduced; the spherical powder is prepared from the yttria-stabilized zirconia powder, and the particle size of the spherical powder is controlled, so that the nozzle with excellent thermal shock resistance is prepared, and the nozzle can be applied to the tundish.

Description

technical field [0001] The invention belongs to the field of refractory materials, and relates to a high-temperature-resistant zirconia raw material, in particular to a nozzle, its preparation method and application. Background technique [0002] The development of steelmaking technology has increased the requirements for the use conditions of refractory materials such as tundish nozzles. Among them, increasing the thermal shock resistance has received special attention. This requires materials that can withstand high levels of wear and tear under rapidly changing temperatures. Generally, zirconia materials are used to prepare refractory materials such as nozzles, but there are problems such as expensive raw materials, high production costs and low production efficiency. Therefore, if the raw materials for the preparation of refractory materials can be improved, it will help promote the further development of the steelmaking process. [0003] Zirconia is one of the main wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/488C04B35/66C04B35/622C04B35/626B22D41/54B22D41/50
CPCC04B35/488C04B35/66C04B35/62204C04B35/62695B22D41/54B22D41/50C04B2235/3225C04B2235/5436C04B2235/6562C04B2235/6567C04B2235/9607
Inventor 刘开琪闫明伟孙广超张佳钰陈运法
Owner 中科南京绿色制造产业创新研究院
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