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Radioactive waste solidification base material and preparation method of solidified glass

A technology for radioactive waste and basic materials, applied in the field of radioactive waste treatment and disposal, can solve problems that have not been reported in the literature, and achieve the effects of low crushing value, strong corrosion resistance, and stable chemical and physical properties

Pending Publication Date: 2019-10-15
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, there have been no literature reports on the use of magmatic rocks in radioactive waste solidification base materials and vitrified bodies

Method used

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  • Radioactive waste solidification base material and preparation method of solidified glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]A radioactive waste solidification base material, the radioactive waste solidification base material is natural magmatic rock, the main chemical composition and weight percentage of the natural magmatic rock are: SiO 2 46.47%, A1 2 o 3 14.40%, CaO 8.81%, MgO 3.87%, Fe 2 o 3 +FeO 13.58%, Na 2 O 2.54%, K 2 O 1.75%, TiO 2 3.78%, the remaining 4.8% (can be a small amount of MnO, P 2 o 5 , SO 3 , BaO, SrO, ZrO 2 , CuO, ZnO, Nb 2 o 5 , Rb 2 O, Y 2 o 3 five or more compounds in the same group).

Embodiment 2

[0032] A method for preparing radioactive waste solidified base material, the steps are: crushing the natural basalt described in Example 1 with a jaw crusher, and then grinding it with a ball mill to obtain a radioactive waste solidified base material, the obtained radioactive waste The particle size of waste solidification base material is less than 200 mesh.

Embodiment 3

[0034] A glass solidified body (ZrO 2 A preparation method for simulating radioactive waste vitrified body), comprising the following steps:

[0035] a. Batching: radioactive waste immobilized base material obtained in Example 2, simulated radioactive waste ZrO 2 As a raw material, 26.4g of base materials, ZrO 2 The mass ratio of 3.6g is taken from each raw material;

[0036] b. Mixing: put each raw material into a ball mill and grind and mix evenly to obtain a mixed material;

[0037] c. Melting: melting the mixed material (which can be put into a crucible) at a temperature of 1450°C for 3 hours to obtain a melt;

[0038] d. Forming: pouring the melt into a copper mold preheated to a temperature of 800°C to form a molded object;

[0039] e. Annealing: heat the molding at 600°C for 1 hour, and then cool it to room temperature at a rate of 1°C / min to obtain the product-the glass solidified body of radioactive waste solidified base material (ie, ZrO 2 Simulated radioactive...

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Abstract

The invention discloses a radioactive waste solidification base material and a preparation method of solidified glass. The invention is characterized in that: the radioactive waste solidification basematerial is natural magmatic rock, which mainly comprises the following components by weight percentage: 45%-65% of SiO2, 9%-18% of Al2O3, 4%-12% of CaO, 3%-10% of MgO, 6%-16% of Fe2O3+FeO, 2%-9% ofNa2O+K2O, 1%-5% of TiO2, and the balance 1%-5%. The preparation method includes: adding simulated radioactive waste into natural magmatic rock, performing powder milling, conducting melting at 1400-1500DEG C for 3-4.5h, and carrying out molding, annealing and cooling, thus obtaining solidified glass. The radioactive waste solidified glass prepared from the radioactive waste solidification base material provided by the invention has good chemical stability and thermal stability, obvious solidification effect and low weight loss rate of simulated radioactive waste elements.

Description

technical field [0001] The invention belongs to the treatment and disposal of radioactive waste, and relates to a preparation method of radioactive waste solidification base material and glass solidified body, which is suitable for the solidification treatment of radioactive waste discharged in nuclear industry and other fields. Background technique [0002] A large amount of radioactive waste will be produced in the process of nuclear energy utilization, which contains a large number of actinides and fission elements with long half-life, high toxicity and high radioactivity. [0003] In the prior art, the solidification treatment of radioactive waste mainly includes vitrification, ceramic solidification, and glass-ceramic solidification. Vitrification has the characteristics of large composition adjustment, simple process, and convenient remote operation. It can "one-time" solidify all components in radioactive waste. It is a relatively mature solidification method in engin...

Claims

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Application Information

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IPC IPC(8): G21F9/34G21F9/30
CPCG21F9/305G21F9/34
Inventor 霍冀川霍泳霖张行泉张凯军余宏福
Owner SOUTHWEAT UNIV OF SCI & TECH
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