Glass matrix composition of lead-boron polyethylene, glass cured body and preparation method of glass cured body

A lead-boron-polyethylene and glass-based technology, applied in the field of nuclear shielding materials, can solve problems such as vitrification of lead-boron-polyethylene, which is not suitable for nuclear shielding materials, and achieve the effects of excellent chemical stability, high volume reduction ratio and simple composition.

Inactive Publication Date: 2021-03-26
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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Problems solved by technology

[0003] Chinese patent CN105813993A discloses a glass composition for vitrification of low-level radioactive waste resin and a method for vitrification of low-level radioactive waste resin using it, the glass composition used in which contains SiO 2 、Al 2 o 3 、B 2 o 3 , CaO, K 2 O, MgO, Na 2 O and Li 2 There are 8 components in O, which can further contain MnO in addition to vitrifying radioactive waste resin. 2 , the containment capacity of simulated radioactive waste reaches 40%, and the total leaching value of vitrified solidified products is less than 2g / m 2 , but not suitable for the vitrification of lead-boron polyethylene, a nuclear shielding material
[0004] Chinese patent CN104318971A discloses a glass matrix composition for medium and low level radioactive glass fibers and vitrification prepared therefrom, the glass matrix composition contains SiO 2 、Al 2 o 3 、B 2 o 3 , CaO, Na 2 O. Li 2 O, TiO 2 A total of 7 components, the total amount of Co, Sr, and Cs oxides added to simulate radioactive waste tracers is 0.6wt%, the mass ratio of simulated waste to glass matrix composition is 80:20-60:40, and the weight loss rate is 28 days at 4.80-6.28g / m 2 , but not suitable for the vitrification of lead-boron polyethylene, a nuclear shielding material

Method used

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  • Glass matrix composition of lead-boron polyethylene, glass cured body and preparation method of glass cured body
  • Glass matrix composition of lead-boron polyethylene, glass cured body and preparation method of glass cured body
  • Glass matrix composition of lead-boron polyethylene, glass cured body and preparation method of glass cured body

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preparation example Construction

[0049] The preparation method of the glass solidified body of an embodiment of the present invention, comprises the following steps:

[0050] S1. Breaking the radioactive lead-boron polyethylene simulants to form fragments;

[0051] Crushing is achieved by mechanical crushing. The fragment size of the radioactive lead boron polyethylene simulant formed after crushing shall not exceed 1cm.

[0052] S2. Evenly mix the pieces of the radioactive lead-boron polyethylene simulant and the glass matrix composition according to the mass ratio of 25:1-4:1 to form a mixture.

[0053] In glass matrix compositions, SiO 2 SiO 2 Form join, B 2 o 3 with B 2 o 3 or H 3 BO 3 Join in the form of Na 2 O to Na 2 CO 3 Form join, K 2 O to K 2 CO 3 Form to join, Al 2 o 3 with Al(OH) 3 or Al 2 o 3 Form to join, Co 2 o 3 With Co 2 o 3 Added in the form of SrO, SrO, SrCl 2 or SrCO 3 Added as a stable compound, Cs 2 O to Cs 2 CO 3 Or a stable compound of CsCl is added.

[00...

Embodiment 1

[0075]Take by weighing 84 parts (mass parts) of radioactive lead-boron polyethylene simulants after fragmentation, wherein the simulated nuclide Co 2 o 3 , SrO, Cs 2 The total amount of O addition accounts for 0.6wt% of the total mass of radioactive lead-boron polyethylene simulant; weigh 16 parts of glass matrix composition (55wt% SiO 2 +45wt%Al 2 o 3 ), mixed with crushed radioactive lead boron polyethylene simulant. Put the mixture in a corundum crucible, put it into a muffle furnace and raise the temperature to 900°C with the furnace at a heating rate of 10°C / min; keep it at 900°C for 0.5-2h and then pour it into a metal mold preheated at 400°C Formed, immediately moved to an electric furnace at 400°C for 2 hours, and then cooled to room temperature with the furnace to obtain a glass solidified body. The components of the glass cured body are shown in Table 1 below (calculated as oxides).

[0076] Table 1

[0077] components Content / wt% PbO 65.62 ...

Embodiment 2

[0084] Weigh 80 pieces of broken radioactive lead-boron polyethylene simulant, wherein the simulated nuclide Co 2 o 3 , SrO, Cs 2 The total amount of O added accounts for 0.5wt% of the total mass of the radioactive lead-boron polyethylene simulant; weigh 20 parts of the glass matrix composition (65wt% SiO 2 +35wt% Al 2 o 3 ). The radioactive lead-boron polyethylene simulant is placed in a corundum crucible, sent into a muffle furnace and raised to 900°C with the furnace at a heating rate of 5°C / min; after holding at 900°C for 0.5-2h, take out the remaining solid residue in the crucible. The solid residue was ground into a powder in an agate mortar, and then uniformly mixed with the glass matrix composition. The mixture is melted in a muffle furnace at 900°C for 0.5h, poured into a metal mold preheated at 400°C for molding, immediately moved to an electric furnace at 400°C for 2h, and cooled to room temperature with the furnace to obtain glass cured body. The components ...

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Abstract

The invention discloses a glass matrix composition of lead-boron polyethylene, a glass cured body and a preparation method of the glass cured body. The glass matrix composition comprises the followingcomponents in parts by mass: 40-100% of SiO2, 0-60% of Al2O3, 0-50% of B2O3, 0-10% of Na2O and 0-10% of K2O, wherein the mass part of at least one of Al2O3, B2O3, Na2O and K2O is not 0. The glass matrix composition of the lead-boron polyethylene can effectively perform vitrification treatment on the nuclear shielding material lead-boron polyethylene, the components are simple, the main componentsat most comprise five components of SiO2, Al2O3, B2O3, Na2O and K2O, and CaO, MgO and Li2O components do not need to be used; the waste capacity is up to 80% or above; the total leaching value of theprepared glass solidified body product is smaller than 1 g/m<2>, and the glass matrix composition has the advantages of being good in chemical stability, low in leaching rate and high in volume reduction ratio.

Description

technical field [0001] The invention relates to the technical field of nuclear shielding materials, in particular to a glass matrix composition of lead-boron polyethylene. Background technique [0002] At home and abroad, there are no publications related to the glass matrix composition of lead-boron polyethylene and the glass solidified body prepared therefrom. [0003] Chinese patent CN105813993A discloses a glass composition for vitrification of low-level radioactive waste resin and a method for vitrification of low-level radioactive waste resin using it, the glass composition used in which contains SiO 2 、Al 2 o 3 , B 2 o 3 , CaO, K 2 O, MgO, Na 2 O and Li 2 There are 8 components in O, which can further contain MnO in addition to vitrifying radioactive waste resin. 2 , the containment capacity of simulated radioactive waste reaches 40%, and the total leaching value of vitrified solidified products is less than 2g / m 2 , but not suitable for the vitrification of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/072C03C1/00
CPCC03C3/072C03C1/00
Inventor 刘春雨李坤锋李丽丽林鹏徐凯王子凡
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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