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Borosilicate glass curing base material as well as preparation method and application thereof

A borosilicate glass and base material technology, which is applied in the field of borosilicate glass solidified base material and its preparation, can solve problems such as potential safety hazards, and achieve the effects of preventing glass devitrification, minimizing volume, and high silicon content

Active Publication Date: 2021-04-09
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the storage method of storing in steel tanks in liquid form has great potential safety hazards, and the capacity of the temporary storage has reached saturation, so it is urgent to solve the problem of its handling and disposal

Method used

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  • Borosilicate glass curing base material as well as preparation method and application thereof
  • Borosilicate glass curing base material as well as preparation method and application thereof
  • Borosilicate glass curing base material as well as preparation method and application thereof

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preparation example Construction

[0035] The present invention also provides a method for preparing a borosilicate vitrified substrate, comprising the following steps:

[0036] The recipe amount of SiO 2 , B 2 o 3 、Al 2 o 3 、Na 2 O, CaO, BaO, TiO 2 , Y 2 o 3 and Fe 2 o 3 After fully grinding and mixing evenly, it is melted at high temperature to form a liquid melt;

[0037] The liquid melt is poured into a preheated mold, cooled and molded, and annealed to obtain a borosilicate vitrified substrate.

[0038] During specific implementation, the grinding particle size is 20 mesh to 40 mesh, and the preferred range is 30 mesh to 40 mesh; after such optimization, the material is mixed more uniformly due to the smaller particle size.

[0039] During specific implementation, the melting temperature can be 1200-1400°C, and the melting time can be 3-6h; preferably, the melting temperature is 1280°C, and the melting time is 3h , this is because the preferred post-melting temperature and time are short, which...

Embodiment 1

[0049] This embodiment provides a borosilicate vitrified substrate, which comprises the following components in terms of mass percent: SiO 2 55%, B 2 o 3 13%, Na 2 O 10%, BaO 2%, TiO 2 1%, Fe 2 o 3 1%, A1 2 o 3 9%, CaO 0%, Y 2 o 3 9%.

[0050] The preparation method of the above-mentioned borosilicate glass-cured substrate specifically comprises the following steps:

[0051] (1) select the raw material of borosilicate vitrification base material, by mass percentage, described raw material comprises following component: SiO 2 55%, B 2 o 3 13%, Na 2 O 10%, BaO 2%, TiO 2 1%, Fe 2 o 3 1%, A1 2 o 3 9%, CaO 0%, Y 2 o 3 9%;

[0052] (2) Put the raw materials into a mixer to fully grind and mix them; place them in a high-temperature furnace and melt them at 1300° C. for 3 hours to completely melt the batching materials into a liquid melt; the grinding particle size is 30 mesh;

[0053] (3) Pour the liquid melt into a mold preheated at 480°C, cool it in...

Embodiment 2

[0055] This embodiment provides a borosilicate vitrified substrate, which comprises the following components in terms of mass percent: SiO 2 53%, B 2 o 3 14%, Na 2 O 12%, BaO 4%, TiO 2 1%, Fe 2 o 3 1%, A1 2 o 3 8%, CaO 0%, Y 2 o 3 7%.

[0056] The preparation method of the above-mentioned borosilicate glass-cured substrate specifically comprises the following steps:

[0057] (1) select the raw material of borosilicate vitrification base material, by mass percentage, described raw material comprises following component: SiO 2 53%, B 2 o 3 14%, Na 2 O 12%, BaO 4%, TiO 2 1%, Fe 2 o 3 1%, A1 2 o 3 8%, CaO 0%, Y 2 o 3 7%;

[0058] (2) Put the raw materials into a mixer to fully grind and mix them; place them in a high-temperature furnace and melt them at 1280° C. for 3 hours to completely melt the batching materials into a liquid melt; the grinding particle size is 30 mesh;

[0059] (3) Pour the liquid melt into a mold preheated at 460°C, cool it in...

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Abstract

The invention relates to a borosilicate glass curing base material as well as a preparation method and application thereof, and the borosilicate glass curing base material comprises the following components in percentage by mass: 45-65% of SiO2, 8-15% of B2O3, 3-15% of Al2O3, 7-16% of Na2O, 0-6% of CaO, 1-6% of BaO, 0.5-2.5% of TiO2, 0.1-10% of Y2O3 and 0.5-2.5% of Fe2O3. According to the invention, the multi-component curing base material is adopted, various radionuclides can be cured at the same time by adjusting the composition and content of the curing base material and adjusting the melting process, the crystallization range of a glass cured body is shortened, glass crystallization is prevented, and the chemical stability and the inclusion capacity of nuclear wastes in the cured body are greatly improved. The borosilicate glass curing base material disclosed by the invention is simple in preparation process and can be widely applied to curing treatment of high-level nuclear wastes.

Description

technical field [0001] The invention belongs to the field of treatment and disposal of radioactive nuclear waste, and in particular relates to a borosilicate glass solidified base material and a preparation method and application thereof. Background technique [0002] As an efficient and clean energy, nuclear energy has high energy density, low cost, and does not produce any air pollution during the power generation process, so it has been developing vigorously in recent years. At the same time, the amount of spent fuel discharged from nuclear power plants is also increasing, and by 2020 the global amount of spent fuel has reached 445,000 tons. At present, only 1 / 3 of the spent fuel unloaded in the world has been reprocessed, and the rest is still in a temporary storage state. The pressure on spent fuel storage is huge. Timely and proper disposal of it has become a current international research hotspot and focus. [0003] The reprocessing of spent fuel will produce a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/095C03B19/02G21F9/16C03B25/00
CPCC03C3/095G21F9/162C03B19/02C03B25/00Y02P40/50
Inventor 朱永昌崔竹赵崇韩勖焦云杰
Owner CHINA BUILDING MATERIALS ACAD
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