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Borate glass ceramic low-temperature solidification method of silver-coated silica gel

A technology of borate glass and curing method, which is applied in glass furnace equipment, glass manufacturing equipment, manufacturing tools and other directions, can solve the problems of inability to handle radioactive iodine for a long time, and the deformation of the cured body affects stability, and achieves good industrial application prospects , Easy to take out, good grinding effect

Active Publication Date: 2019-05-14
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can directly form AgI to cure radioactive iodine, but the silica gel particles themselves are easily affected by external environmental factors such as pressure, temperature, humidity, etc., resulting in the deformation of the cured body affecting its stability, which cannot meet the long-term disposal of radioactive iodine. needs

Method used

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  • Borate glass ceramic low-temperature solidification method of silver-coated silica gel
  • Borate glass ceramic low-temperature solidification method of silver-coated silica gel
  • Borate glass ceramic low-temperature solidification method of silver-coated silica gel

Examples

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Embodiment 1

[0082] In this example, the common iodine-127 is used to simulate the radionuclide iodine-129. A low-temperature curing method for borate glass ceramics coated with silver silica gel, comprising the following steps:

[0083] (1) mixing and grinding silica gel particles and AgI to obtain iodine-containing silver-coated silica gel particles, and filtering through a filter to obtain iodine-containing silver-coated silica gel particles with a maximum outer diameter less than or equal to 200 μm;

[0084] (2) Mix boron oxide, bismuth oxide and zinc oxide into a high-temperature muffle furnace or microwave sintering furnace, sinter at 1000°C to 2000°C to obtain glass ceramics, and grind the glass ceramics to obtain borate glass ceramic powder . In the borate glass ceramic powder, by mass percentage, in this embodiment, boron oxide is 60%, bismuth oxide is 28%, and zinc oxide is 12%. In actual use, boron oxide is 40% to 70%, bismuth oxide is 22% to 48%, and zinc oxide is 8% to 12%. ...

Embodiment 2

[0091] In this example, the common iodine-127 is also used to simulate the radionuclide iodine-129. A low-temperature curing method for borate glass ceramics coated with silver silica gel, comprising the following steps:

[0092] (1) mixing and grinding silica gel particles and AgI to obtain iodine-containing silver-coated silica gel particles, and filtering through a filter to obtain iodine-containing silver-coated silica gel particles with a maximum outer diameter less than or equal to 200 μm;

[0093] (2) Mix boron oxide, bismuth oxide and zinc oxide into a high-temperature muffle furnace or microwave sintering furnace, sinter at 1000°C to 2000°C to obtain glass ceramics, and grind the glass ceramics to obtain borate glass ceramic powder . In the borate glass ceramic powder, by mass percentage, in this embodiment, boron oxide is 50%, bismuth oxide is 40%, and zinc oxide is 10%.

[0094] (3) Mix iodine-containing silver-coated silica gel particles with borate glass-ceramic...

Embodiment 3

[0098] Such as figure 1 As shown, this embodiment discloses a curing device for implementing the method of the present application, and the curing device includes:

[0099] The first sintering device 1 is used for sintering boron oxide, bismuth oxide and zinc oxide to obtain borate glass ceramics;

[0100] Glass-ceramic grinding device 2, for grinding borate glass-ceramic into borate glass-ceramic powder;

[0101] Silver-coated silica gel particle filter mechanism 3;

[0102] Colloid mill 4, used for mixing and grinding silver-coated silica gel particles and borate glass ceramic powder;

[0103] Drying device 5, is used for receiving the wet mixture from colloid mill 4, and to mixture drying, obtains dry mixture;

[0104] The second sintering device 6 is used for sintering the dried mixture.

[0105] The first sintering device 1 and the second sintering device 6 can be equipment such as high temperature muffle furnace or microwave sintering furnace.

[0106] Such as figu...

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Abstract

The invention discloses a borate glass ceramic low-temperature solidification method of silver-coated silica gel. The borate glass ceramic low-temperature solidification method of silver-coated silicagel comprises the following steps: mixing silver-coated silica gel granules containing radioactive iodine and a borate glass ceramic powder, adding deionized water and grinding to obtain a humid mixture, wherein the borate glass ceramic consists of boron oxide, bismuth oxide and zinc oxide; dryin the humid mixture to obtain a dried mixture; and putting the dried mixture into a sintering device, sintering and cooling after sintering to obtain a glass ceramic sintering body. The glass ceramic sintering body provided by the invention contains silver-coated silica gel containing radioactive iodine; and the glass ceramic sintering body has the advantages of high volume density, low nuclide leaching rate and the like and can inhibit migration of the radioactive iodine in the natural world well.In addition, the low-temperature solidification method has the characteristics of simple technological process, energy conservation, environmental friendliness, safety, reliability and the like, andhas a good industrial application prospect.

Description

technical field [0001] The invention relates to the field of radioactive waste treatment, in particular to a low-temperature curing method for borate glass ceramics coated with silver silica gel. Background technique [0002] Nuclear technology is favored by people as a clean and efficient energy source, but the development of nuclear energy is accompanied by the production of a large number of radioactive nuclides, which will produce various heavy ions and rays during the decay process, or pass through the food chain These behaviors can cause serious damage to organisms and threaten their survival. Among them, iodine-129 needs to be disposed of urgently because of its long half-life. At present, the treatment methods for radioactive iodine mainly include ocean disposal, cement, plastic, asphalt solidification, etc. Although these methods can dispose of radioactive iodine to a certain extent, there are problems such as poor stability of the solidified body and secondary po...

Claims

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Application Information

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IPC IPC(8): C03C10/00C03B5/235
Inventor 卢喜瑞张振涛李炳生舒小艳刘刈陈顺彰魏贵林
Owner SOUTHWEAT UNIV OF SCI & TECH
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