Ceramic crucible matched with intermediate frequency furnace and preparation method of ceramic crucible

A technology for a ceramic crucible and an intermediate frequency furnace, which is applied in the field of ceramic crucibles for intermediate frequency furnaces and its preparation, can solve the problems of slag inclusion and pores, poor thermal shock resistance, pollution of precision castings, etc., and achieve stable chemical properties, prevent pollution or Effects of slag inclusion, improved performance and production efficiency

Active Publication Date: 2022-03-04
LIAONING SILICATE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a ceramic crucible for an intermediate frequency furnace and a preparation method thereof, in order to solve the problems of poor thermal shock resistance, contamination of molten steel, miscellaneous components, etc. in previous crucibles, which are very easy to cause pollution to precision castings, jamming, etc. Defects such as slag and pores

Method used

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  • Ceramic crucible matched with intermediate frequency furnace and preparation method of ceramic crucible
  • Ceramic crucible matched with intermediate frequency furnace and preparation method of ceramic crucible
  • Ceramic crucible matched with intermediate frequency furnace and preparation method of ceramic crucible

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Embodiment 1

[0033] To prepare a ceramic crucible for an intermediate frequency furnace, the specific steps are as follows:

[0034] a) Mixing of main ingredients: by weight, take 40 parts of fused silica powder between 120 mesh and 350 mesh, 10 parts of white corundum powder between 120 mesh and 350 mesh, 30 parts of α-alumina powder below 325 mesh, 30 μm grain 28 parts of diameter γ-alumina powder and 2 parts of white carbon black are sent into the gravity-free mixing equipment, and the raw materials are mixed evenly for 15 minutes before use;

[0035] b) Mixing of auxiliary materials: according to the total weight of main materials, take 0.2 parts of boric acid, 0.6 parts of sodium polyacrylate, 1.25 parts of silane coupling agent (KH-570), and 8 parts of silica sol, put them into a mixer and stir for 3 minutes, and set aside;

[0036] c) Mixing of main ingredients and auxiliary materials: send the fully mixed main ingredients into the blender, divide the fully dissolved auxiliary mater...

Embodiment 2

[0044] Prepare a ceramic crucible for an intermediate frequency furnace, the specific steps are as follows:

[0045] a) Mixing of main ingredients: by weight, take 50 parts of fused silica powder between 120 mesh and 350 mesh, 0 parts of white corundum powder between 120 mesh and 350 mesh, 28 parts of α-alumina powder below 325 mesh, 30 μm grain 18 parts of diameter γ-alumina powder and 4 parts of white carbon black are sent into the gravity-free mixing equipment, and the raw materials are mixed evenly for 10 minutes before use;

[0046] b) Mixing of auxiliary materials: according to the total weight of main materials, take 0.4 parts of boric acid, 1 part of sodium polyacrylate, 1 part of silane coupling agent (KH-570), and 10 parts of silica sol, put them into a mixer and stir for 5 minutes, and set aside;

[0047]c) Mixing of main ingredients and auxiliary materials: Send the fully mixed main ingredients into the blender, divide the fully dissolved auxiliary materials into 2...

Embodiment 3

[0055] To prepare a ceramic crucible for an intermediate frequency furnace, the specific steps are as follows:

[0056] a) Mixing of main ingredients: by weight, take 20 parts of fused silica powder between 120 mesh and 350 mesh, 30 parts of white corundum powder between 120 mesh and 350 mesh, 28 parts of α-alumina powder below 325 mesh, 30 μm grain 20 parts of diameter γ-alumina powder and 2 parts of white carbon black are sent into the gravity-free mixing equipment, and the raw materials are mixed evenly for 20 minutes before use;

[0057] b) Mixing of auxiliary materials: according to the total weight of main materials, take 0.6 parts of boric acid, 1.25 parts of sodium polyacrylate, 0.6 parts of silane coupling agent (KH-570), and 10 parts of silica sol, put them into a mixer and stir for 5 minutes, and set aside;

[0058] c) Mixing of main ingredients and auxiliary materials: Send the fully mixed main ingredients into the blender, divide the fully dissolved auxiliary mate...

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Abstract

The invention discloses a ceramic crucible matched with an intermediate frequency furnace and a preparation method of the ceramic crucible, the ceramic crucible matched with the intermediate frequency furnace is stable in chemical property, and the main components of the ceramic crucible are only SiO2 and Al2O3, so that the ceramic crucible cannot react with molten steel in the casting use process, meanwhile, harmful free substances cannot be separated out, and the risks of pollution or slag inclusion pores and the like of castings are completely eradicated. Besides, the fused quartz is a substance with the thermal expansion coefficient almost being 0 and has extremely low volume change rate and extremely high thermal shock resistance, smooth casting is guaranteed on the basis that the use strength is met, and the performance and production efficiency of the high-temperature alloy precision casting can be greatly improved through the fused quartz and the preparation method thereof.

Description

technical field [0001] The disclosure of the invention relates to the technical field of preparation of ceramic crucibles, in particular to a ceramic crucible for supporting an intermediate frequency furnace and a preparation method thereof. Background technique [0002] With the development of the foundry industry, the medium frequency induction furnace has been widely used in the melting of metals and alloys in the field of materials and metallurgy because of its advantages of fast melting speed, uniform composition, high temperature, simple operation process, and small environmental pollution. The crucible is also one of the important components of the intermediate frequency induction furnace casting. The quality of the crucible has a crucial impact on the quality of the casting. It requires sufficient refractoriness, small volume change, good thermal shock resistance, and chemical stability. Good, does not pollute molten steel and has sufficient sintering strength to res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/101C04B35/622
CPCC04B35/101C04B35/622C04B2235/3418C04B2235/9607C04B2235/3409C04B2235/5436
Inventor 张挽邱宏毕佳林高琳琳史会娇张园园李阳
Owner LIAONING SILICATE RES INST
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