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Hydration synthesis method of iodine-containing silver-coated silica gel glass solidifying body

A technology of glass curing and silver silica gel, which is applied in the fields of radioactive purification and nuclear engineering. It can solve the problems that the deformation of the solidified body affects the stability and cannot meet the needs of long-term disposal of radioactive iodine. It achieves good industrial application prospects, shortens the sintering time, The effect of high bulk density

Active Publication Date: 2019-09-03
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Hydration synthesis method of iodine-containing silver-coated silica gel glass solidifying body
  • Hydration synthesis method of iodine-containing silver-coated silica gel glass solidifying body
  • Hydration synthesis method of iodine-containing silver-coated silica gel glass solidifying body

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Embodiment 1

[0045] In this example, the common iodine-127 is used to simulate the radionuclide iodine-129. This embodiment discloses a method for hydration synthesis of iodine-containing silver-coated silica gel glass solidified body, comprising the following steps:

[0046] (1) Borate raw materials and silver-coated silica gel particles containing radioactive iodine (maximum outer diameter less than or equal to 200 μm) are added to deionized water and then mixed and ground to obtain a water-based slurry, wherein the borate raw materials are made of boron oxide, Composition of bismuth and zinc oxide, by mass percentage, boron oxide 60%, bismuth oxide 28%, zinc oxide 12%. Among the raw materials of the water-based slurry, by mass fraction, the silver-coated silica gel is 50.68%, the radioactive pollutant iodine is 9.32%, and the borate glass raw material is 40.00%. In actual use, in terms of mass percentage, boron oxide is 40% to 70%, bismuth oxide is 22% to 48%, and zinc oxide is 8% to 1...

Embodiment 2

[0055] In this example, the common iodine-127 is used to simulate the radionuclide iodine-129. This embodiment discloses a method for hydration synthesis of iodine-containing silver-coated silica gel glass solidified body, comprising the following steps:

[0056] (1) Borate raw materials and iodine-containing silver-coated silica gel particles (particle size less than or equal to 200 μm) are added to deionized water and then mixed and ground to obtain a water-based slurry, wherein the borate raw materials are made of boron oxide, bismuth oxide Composed of zinc oxide, by mass percentage, boron oxide 50%, bismuth oxide 40%, zinc oxide 10%. Among the raw materials of the water-based slurry, by mass fraction, silver-coated silica gel is 65.65%, iodine element is 14.35%, and borate raw material is 20.00%. In this embodiment, the mass ratio of the total mass of the borate raw material and the silver-coated silica gel particles containing radioactive iodine to the deionized water is...

Embodiment 3

[0061] In this example, the common iodine-127 is used to simulate the radionuclide iodine-129. This embodiment discloses a method for hydration synthesis of iodine-containing silver-coated silica gel glass solidified body, comprising the following steps:

[0062] (1) Borate raw materials and silver-coated silica gel particles containing radioactive iodine (maximum outer diameter less than or equal to 200 μm) are added to deionized water and then mixed and ground to obtain a water-based slurry, wherein the borate raw materials are made of boron oxide, Composed of bismuth and zinc oxide. Among the raw materials of the water-based slurry, by mass fraction, silver-coated silica gel is 55.65%, iodine element is 14.35%, and borate raw material is 30.00%. In this embodiment, the mass ratio of the total mass of the borate raw material and the silver-coated silica gel particles containing radioactive iodine to the deionized water is 0.1.

[0063] (2) Control the temperature of the si...

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Abstract

The invention discloses a hydration synthesis method of an iodine-containing silver-coated silica gel glass solidifying body. The hydration synthesis method comprises: adding a borate raw material andsilver-coated silica gel particles containing radioactive iodine to deionized water, and carrying out mixing grinding to obtain a water-based slurry; controlling the temperature of a sintering furnace to rise to a set sintering temperature, maintaining the water-based slurry in a uniformly mixing state, conveying the water-based slurry to the sintering furnace at a constant speed, and sintering;and after the water-based slurry is conveyed, carrying out thermal insulation according to a preset thermal insulation time, and cooling to a room temperature after completing the thermal insulation so as to obtain the iodine-containing silver-coated silica gel glass solidifying body. According to the present invention, with the method, the sintering temperature can be well reduced, the sinteringtime can be shortened, and the prepared iodine-containing silver-coated silica gel glass solidifying body has advantages of high bulk density, low nuclide leaching rate and the like, and can well inhibit the migration of radioactive iodine in nature.

Description

technical field [0001] The invention relates to the field of radioactive waste treatment, in particular to a hydration synthesis method of iodine-containing silver-coated silica gel glass solidified body. Background technique [0002] The rapid development of nuclear technology is accompanied by the production of a large number of radionuclides. The disposal of radionuclides has attracted much attention as a relatively complicated issue. These nuclides will produce various heavy ions and rays during the decay process, which is harmful to the environment and human beings. will have some negative effects. Radioactive iodine is one of the nuclides, except for iodine-129, the half-life of other radioactive iodine is relatively low. Therefore, the disposal of iodine-129 is imminent. 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 c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/30
CPCG21F9/305
Inventor 卢喜瑞张振涛李炳生舒小艳刘刈魏贵林李胜
Owner SOUTHWEAT UNIV OF SCI & TECH
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