CN-119400475-B - Method for solidifying glass by using radioactive incineration ash and polluted glass fiber filter material together

Abstract

The invention relates to a common glass solidification method of radioactive incineration ash and a polluted glass fiber filter material, which adopts a method I or a method II to melt and solidify raw materials containing the radioactive incineration ash and the polluted glass fiber filter material to prepare a glass solidified body, wherein the method I comprises the steps that the raw materials containing the radioactive incineration ash and the polluted glass fiber filter material consist of 0-30wt% of radioactive incineration ash and 70-100deg.C of polluted glass fiber filter material, the melting temperature is 1100-1400 ℃, and the method II comprises the steps that the raw materials containing the radioactive incineration ash and the polluted glass fiber filter material consist of 0-40wt% of radioactive incineration ash, 30-60wt% of polluted glass fiber filter material and 15-50wt% of additive, and the melting temperature is 900-1300 ℃. The invention can effectively and stably obtain the glass solidified body meeting the disposal requirement on the premise that the components of the incineration ash greatly fluctuate and the components of the fly ash contained in the polluted glass fiber filter material are indefinite.

Inventors

• CUI HAN
• RUAN JIACHENG
• ZHANG YU
• ZHAO SHIJIE
• YUAN BO
• LI HUAN
• XU WEI
• LI XIAOHAI

Assignees

• 中国辐射防护研究院

Dates

Publication Date

20260505

Application Date

20241011

Claims (6)

1. 1. A method for solidifying glass by using radioactive incineration ash and polluted glass fiber filter material together is characterized by that the raw material containing radioactive incineration ash and polluted glass fiber filter material is melted and solidified to prepare glass solidified body, The raw materials containing the radioactive incineration ash and the polluted glass fiber filter material consist of 0-30wt% of the radioactive incineration ash and 70-100deg.C of the polluted glass fiber filter material, and the melting temperature is 1100-1400 ℃; When the dust content of the polluted glass fiber filter material is less than or equal to 15wt%, the material compatibility range is that the content of the polluted glass fiber filter material is more than or equal to 70wt%, the content of radioactive incineration ash is less than or equal to 30wt%, when the dust content of the polluted glass fiber filter material is less than or equal to 15wt%, the material compatibility range is that the content of the polluted glass fiber filter material is more than or equal to 80wt%, the content of the radioactive incineration ash is less than or equal to 20wt%, when the dust content of the polluted glass fiber filter material is less than or equal to 25wt%, and when the dust content of the polluted glass fiber filter material is less than or equal to 35wt%, the material compatibility range is that the content of the polluted glass fiber filter material is more than or equal to 90wt%, and the content of the radioactive incineration ash is less than or equal to 10wt% Before the radioactive incineration ash and the polluted glass fiber filter material are melted and solidified, metal objects in the radioactive incineration ash and the polluted glass fiber filter material are removed, and the radioactive incineration ash and the polluted glass fiber filter material are detected by a metal detector, so that the removal is ensured to be clean; The metal object comprises one or more of a metal block, an aluminum foil and a metal wire.
2. 2. The method for co-glass curing of radioactive incineration ash and polluted glass fiber filter materials according to claim 1, wherein the polluted glass fiber filter materials are obtained by disassembling and separating radioactive waste nuclear-grade air filters, and the radioactive incineration ash is obtained by incinerating or pyrolyzing radioactive combustible waste.
3. 3. The method for co-glass curing of radioactive incineration ash and stained glass fiber filter material according to claim 2, wherein the radioactive combustible waste comprises one or more of waste resin, mask, cotton clothing, gloves, shoes, protective clothing, anti-staining plastic cloth and rubber gaskets.
4. 4. The method for co-curing glass by using radioactive incineration ash and stained glass fiber filter materials according to claim 1 is characterized in that the radioactive incineration ash comprises 20-65wt% of calcium oxide, 0-25wt% of silicon oxide, 0-25wt% of aluminum oxide, 0-15wt% of ferric oxide, 0-15wt% of titanium oxide, 0-10wt% of sulfur trioxide, 0-10wt% of chlorine element and 10-40wt% of carbonate calculated by carbon dioxide.
5. 5. The common glass curing method for the radioactive incineration ash and the contaminated glass fiber filter material is characterized in that the contaminated glass fiber filter material comprises 30-60 wt% of silicon oxide, 2-15 wt% of calcium oxide, 0-25 wt% of carbonate, 3-15 wt% of boron oxide, 3-20 wt% of sodium oxide, 2-15 wt% of aluminum oxide, 0-10 wt% of potassium oxide, 0-9 wt% of barium oxide and 0-9 wt% of zinc oxide based on carbon dioxide.
6. 6. The method for co-glass curing of radioactive incineration ash and stained glass fiber filter material according to claim 1, wherein the thermal ignition rate of the radioactive incineration ash is less than 5%, and the combustible component content of the stained glass fiber filter material is less than 15%.

Description

Method for solidifying glass by using radioactive incineration ash and polluted glass fiber filter material together Technical Field The invention belongs to the technical field of radioactive nuclear waste treatment, and particularly relates to a method for solidifying glass jointly by radioactive incineration ash and polluted glass fiber filter materials. Background Combustible waste and a high-efficiency filter element in medium-low level waste generated in the operation process of the nuclear facility occupy a great proportion. Based on the principle of minimizing radioactive waste, the method for incinerating combustible waste and cleaning and controlling the shell after the filter element is disassembled is an ideal scheme. However, the radioactive incineration ash and the polluted glass fiber filter material produced by the two technologies are not suitable to be directly disposed as final products due to the risk of leaching of radioactive elements and dispersion of radioactive aerosols. At present, the treatment of radioactive incineration ash and polluted glass fiber filter materials is usually carried out cement curing or super compression treatment respectively and independently, but the cement curing technology belongs to the compatibilization treatment technology, the waste amount is increased, the leaching resistance of a cured body is lower than that of the glass curing technology, and the compatibility of the two wastes is poor due to overpressure. There are also related technologies of glass curing treatment of radioactive incineration ash and pollution of glass fiber filter materials in China, but engineering application is not seen, and the problems of the technology are that 1) two kinds of solid wastes are independently subjected to glass curing, a large amount of glass matrix compositions are required to be additionally added, the cost of glass curing is increased, the weight of a cured body is increased under the condition of the same solid wastes, and 2) in the prior art, the research on the glass curing technology of the radioactive incineration ash is mostly based on analysis of a certain kind of waste, and the experiment is carried out by using reagents with the same main components to simulate the waste. In actual engineering treatment of wastes, the radioactive combustible wastes are various in types, the radioactive incineration ash components and proportion of different batches are greatly fluctuated due to the fact that the radioactive incineration ash components and proportion are not selected and proportioned during incineration, particularly calcium aluminum elements, the large fluctuated glass solidification bodies are unstable, pouring is difficult, radioactive elements are leached, universality and feasibility of the method are seriously affected, the property of a solidified product is instable due to lack of generality when the glass solidification method is only aimed at radioactive solid wastes with specific compositions, and the method is unacceptable, although a certain raw material range is usually given in the prior art, the practice finds that qualified glass solidification bodies can not be obtained at any value in the given range, but qualified glass solidification bodies can be obtained only by carrying out glass solidification under specific parameter combination. Therefore, the components and the content of each batch of incineration ash need to be detected, and the process conditions of raw material preparation and glass curing are developed for different batches of incineration ash, which clearly increases the workload and the cost of glass curing of radioactive combustible waste and lacks application feasibility. 3) The radioactive combustible waste incineration ash often contains mask nose bridge strips, metal screws and nuts and other metal objects, and aluminum foils are doped when filter materials are not completely disassembled. Most of the existing glass curing technologies cannot process raw materials containing metal objects, so that the metal objects in the raw materials need to be removed before the glass is cured. Therefore, developing a method for solidifying glass jointly by radioactive incineration ash and polluted glass fiber filter materials is very important, and glass solidified bodies meeting disposal requirements can be effectively and stably obtained on the premise that the incineration ash components greatly fluctuate and fly ash components contained in the polluted glass fiber filter materials are indefinite. Disclosure of Invention The invention aims to overcome the defects in the prior art, provides a method for jointly solidifying glass by using radioactive solid waste incineration ash and polluted glass fiber filter materials, and solves a series of defects caused by large fluctuation of components and content of different batches of radioactive solid waste when the radioactive solid waste incineration ash and the polluted gl