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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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the prior art, there have been no literature reports on the use of magm

Method used

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

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Example Embodiment

[0029] Example 1:

[0030] A basic material for solidification of radioactive waste. The basic material for solidification of radioactive waste 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% (may 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 category).

Example Embodiment

[0031] Example 2:

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

Example Embodiment

[0033] Example 3:

[0034] A glass solidified body (ZrO 2 The preparation method of simulated radioactive waste glass solidified body) includes the following steps:

[0035] a. Ingredients: radioactive waste solidification basic materials prepared in Example 2 and simulated radioactive waste ZrO 2 As raw materials, and solidify 26.4g, ZrO 2 The mass ratio of 3.6g is taken from each raw material;

[0036] b. Mixing: Put the raw materials into a ball mill to grind and mix evenly to obtain a mixture;

[0037] c. Melting: The mixture material (which can be put into a crucible) is melted at 1450°C for 3 hours to obtain a melt;

[0038] d. Molding: Pour the melt into a copper mold that has been preheated to a temperature of 800°C to form a molded product;

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

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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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