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A method for preparing high-radioactive waste liquid glass-ceramic solidified body by microwave method

A high-radioactive, glass-ceramic technology, applied in radioactive purification, nuclear engineering, etc., can solve the problems of long heating and cooling time, high energy consumption of solidified body, high production cost, etc., to reduce environmental pollution, simple process, and high heating speed fast effect

Active Publication Date: 2015-07-29
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of ordinary electric furnaces to prepare solidified bodies requires high energy consumption, long heating and cooling time, and high production costs cannot meet the needs of society.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1. Perovskite zircon-calcium titanate composite mineral preparation:

[0017] Raw material: CaCO 3 20.6%, ZrO 2 25.1%, TiO 2 33.3%; high-level waste liquid types: Zr ions, Mo ions, Ru ions, Pd ions, Np ions, Pu ions, nitrate ions, oxalate ions; sintering aid: graphite powder 1%.

[0018] Fully mix the raw materials, sintering aid powder and high-level waste liquid, then pour it into a corundum crucible, adjust the microwave power to stabilize the temperature at 800°C, and keep it warm for 30 minutes. Increase the microwave power to raise the temperature to 1400°C and keep it warm for 3 hours. Reduce the microwave power at 600°C and incubate for 2 hours. Reduce the microwave power to 0W until the temperature drops to room temperature. The prepared solidified body is perovskite zircon-calcium titanate combined mineral solidified body.

Embodiment 2

[0019] Example 2. Perovskite zircon-calcium titanate composite mineral preparation:

[0020] Raw material: CaCO 3 20.6%, ZrO 2 25.1%, TiO 2 33.3%; High-level waste liquid type: Y ion, Mo ion, Ru ion, Pd ion, La ion, Ce ion, Pr ion, Nd ion, Sm ion, Eu ion, Gd ion, Am ion, Cm ion, nitrate Ions; sintering aid: silicon carbide powder 1%.

[0021] Fully mix the raw materials, sintering aid powder and high-level waste liquid, then pour it into a corundum crucible, adjust the microwave power to stabilize the temperature at 800°C, and keep it warm for 30 minutes. Increase the microwave power to raise the temperature to 1400°C and keep it warm for 3 hours. Reduce the microwave power at 600°C and incubate for 2 hours. Reduce the microwave power to 0W until the temperature drops to room temperature. The prepared solidified body is perovskite zircon-calcium titanate combined mineral solidified body.

Embodiment 3

[0022] Example 3. Preparation of titanite-zircon composite minerals:

[0023] Raw material: CaCO 3 33.3%, SiO 2 19.6%, TiO 2 26.1%; high-level waste liquid types: Zr ions, Mo ions, Ru ions, Pd ions, Np ions, Pu ions, nitrate ions, oxalate ions; sintering aid: graphite powder 1%.

[0024] Fully mix the raw materials, sintering aid powder and high-level waste liquid, then pour it into a corundum crucible, adjust the microwave power to stabilize the temperature at 800°C, and keep it warm for 30 minutes. Increase the microwave power to raise the temperature to 1300°C and keep it warm for 3 hours. Reduce the microwave power at 800°C and incubate for 2 hours. Reduce the microwave power to 0W until the temperature drops to room temperature. The prepared solidified body is perovskite zircon-calcium titanate combined mineral solidified body.

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Abstract

The invention discloses a method for preparing a high-radioactivity effluent glass-ceramic solidified body in a microwave process, which belongs to the field of new materials and includes steps of: using one or several of calcium titanate, zirconium silicate, calcium carbonate, titanium oxide, zirconium oxide and silicon oxide as the raw materials, using microwave as a heating source, and using graphite powder or silicon carbide powder as a combustion-assisting agent to perform low-temperature microwave volume-reduction treatment on high-radioactivity effluent, then roasting at high temperature to prepare a combined mineral solidified body, and performing vitrification treatment so as to further reduce volume of the solidified body. The method for preparing the high-radioactivity effluent glass-ceramic solidified body in the microwave process is little in energy consumption, simple in process and low in production cost.

Description

technical field [0001] The invention relates to a method for preparing a solidified body of high-radioactive waste liquid glass ceramics by a microwave method. In particular, it relates to a method for preparing a high-level waste liquid combined mineral glass-ceramic solidified body by using microwaves as a heating source. Background technique [0002] With the rapid development of the nuclear industry, a large amount of radioactive nuclear waste will be produced. How to safely and effectively deal with these nuclear wastes has become a bottleneck restricting the development of the nuclear industry. A more feasible method is to solidify the radionuclide in the ceramic body by lattice substitution. It has been proved by research that perovskite zircon is a relatively good ceramic solidified body under the condition of geological disposal not exceeding 400 ° C, but the reality is high radioactivity. There are many types of nuclides in waste liquid, which cannot be satisfied ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03B32/02G21F9/16
Inventor 董发勤李伟民宋功保卢喜瑞杨玉山陈世杰
Owner SOUTHWEAT UNIV OF SCI & TECH
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