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Solidification method of radioactive waste residues
The invention provides a solidification method of radioactive waste residues. The solidification method comprises the following steps: S1, crushing the radioactive waste residues to be treated into crushed residues; S2, uniformly mixing the crushed residues with a functional filler and cement to obtain a mixture; S3, adding water into sodium silicate or water glass to obtain a sodium silicate aqueous solution, and then adding inorganic acid to obtain acidified water glass; S4, adding PVA into water at a preset temperature, and dissolving to obtain a PVA solution; and S5, uniformly mixing the mixture with the acidified sodium silicate and the PVA solution to obtain a castable, and then pouring and maintaining the castable to obtain a cement solidified body waste residue bag. By utilizing the curing and film-forming effects of PVA and the filling effect of active silica gel in acidified sodium silicate, the strength and water resistance of a solidified body are remarkably improved, and the porosity of the solidified body is reduced, so that the ion diffusion resistance is increased, and the diffusion and exudation rate of nuclide ions is remarkably reduced.
本发明提供了一种放射性废渣的固化方法，包括以下步骤：S1.将待处理的放射性废渣粉碎为碎渣；S2.将碎渣与功能填料和水泥混合均匀，得到混合料；S3.将水加入到硅酸钠或水玻璃中，得到硅酸钠水溶液，然后添加无机酸得到酸化水玻璃；S4.将PVA加入预设温度的水中，溶解得到PVA溶液；S5.将所述混合料与所述酸化水玻璃和PVA溶液混合均匀，得到浇注料，然后将浇注料浇注和养护，得到水泥固化体废渣包。本发明利用PVA的固化和成膜作用以及酸化水玻璃中活性硅胶的填充作用，显著提高了固化体的强度和抗水性能，降低了固化体的孔隙率，从而增加了离子扩散阻力，使得核素离子的扩散渗出率显著降低。
Solidification method of radioactive waste residues
The invention provides a solidification method of radioactive waste residues. The solidification method comprises the following steps: S1, crushing the radioactive waste residues to be treated into crushed residues; S2, uniformly mixing the crushed residues with a functional filler and cement to obtain a mixture; S3, adding water into sodium silicate or water glass to obtain a sodium silicate aqueous solution, and then adding inorganic acid to obtain acidified water glass; S4, adding PVA into water at a preset temperature, and dissolving to obtain a PVA solution; and S5, uniformly mixing the mixture with the acidified sodium silicate and the PVA solution to obtain a castable, and then pouring and maintaining the castable to obtain a cement solidified body waste residue bag. By utilizing the curing and film-forming effects of PVA and the filling effect of active silica gel in acidified sodium silicate, the strength and water resistance of a solidified body are remarkably improved, and the porosity of the solidified body is reduced, so that the ion diffusion resistance is increased, and the diffusion and exudation rate of nuclide ions is remarkably reduced.
本发明提供了一种放射性废渣的固化方法，包括以下步骤：S1.将待处理的放射性废渣粉碎为碎渣；S2.将碎渣与功能填料和水泥混合均匀，得到混合料；S3.将水加入到硅酸钠或水玻璃中，得到硅酸钠水溶液，然后添加无机酸得到酸化水玻璃；S4.将PVA加入预设温度的水中，溶解得到PVA溶液；S5.将所述混合料与所述酸化水玻璃和PVA溶液混合均匀，得到浇注料，然后将浇注料浇注和养护，得到水泥固化体废渣包。本发明利用PVA的固化和成膜作用以及酸化水玻璃中活性硅胶的填充作用，显著提高了固化体的强度和抗水性能，降低了固化体的孔隙率，从而增加了离子扩散阻力，使得核素离子的扩散渗出率显著降低。
Solidification method of radioactive waste residues
一种放射性废渣的固化方法
HONG CHANGSHOU (author) / CHEN YIFAN (author) / LIU YONG (author) / LUO MINGLIANG (author) / LI XIQI (author) / LAN MING (author) / LI XIANGYANG (author) / WANG HONG (author) / YU XIUWU (author) / LI SUZHE (author)
2020-04-24
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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