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Radioactive waste oil cement solidified body and preparation method thereof

A technology for cement solidification and radioactive waste, applied in radioactive purification, nuclear engineering, etc., can solve problems such as inability to form uniformity, insufficient performance of cement solidification body, and influence on cement hydration reaction process, so as to achieve good disposal, not easy to leach, good compatibility

Active Publication Date: 2022-02-25
CPI YUANDA ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, radioactive waste engine oil mixed with cement alone cannot form a homogeneous system
If the machine oil is directly added to the cement for curing, the machine oil will affect the cement hydration reaction process, and eventually the performance of the cement solidified body will not meet the requirements of the national standard GB14569.1-2011

Method used

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  • Radioactive waste oil cement solidified body and preparation method thereof
  • Radioactive waste oil cement solidified body and preparation method thereof
  • Radioactive waste oil cement solidified body and preparation method thereof

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preparation example Construction

[0056] The embodiment of the present invention discloses a preparation method of radioactive waste oil cement solidification body, comprising the following steps:

[0057] The acrylate copolymer super oil-absorbing resin and radioactive waste oil are mixed according to the mass ratio of 1:10-18, and the mixture is obtained after standing;

[0058] mixing and stirring cement, zeolite powder, kaolin, polypropylene fiber and water to obtain cement solidified slurry; the ratio of the total mass of the cement, zeolite powder, kaolin and polypropylene fiber to the mass of water is 1:0.1-0.2;

[0059] Mixing the mixture and cement solidified slurry according to the ratio, and stirring to obtain a solidified body of radioactive waste oil cement;

[0060] The percentage content of each component included in the solidified body of radioactive waste oil cement is:

[0061] 25-50wt% cement;

[0062] 10-50wt% radioactive waste oil;

[0063] 4-10wt% zeolite powder;

[0064] 8-20wt% kaol...

Embodiment 1

[0082] 1) Add 15 kg of simulated radioactive waste oil into a container containing 1 kg of polymer oil-absorbing material, stir at a constant speed for 10 min, and the linear speed of the stirring blade is 5 m / s. Let stand for 0.5h. Obtain polymer oil-absorbing material-simulated radioactive waste oil mixture;

[0083] 2) Mix 20kg composite Portland cement, 1.8kg zeolite powder, 3.6kg kaolin, and 3.6g polypropylene fiber to make 25.4kg cement-based solidified slurry material, and place 5kg simulated radioactive waste water in a high-speed pulping machine. Stir for 4 minutes, and the linear speed of the stirring blade of the high-speed pulping machine is 20m / s, to obtain a cement-based solidified slurry;

[0084] 3) Add the cement-based solidified slurry into the container, mix it with the polymer oil-absorbing material-simulated radioactive waste oil mixture, stir the blade at a linear speed of 12m / s, stir for 10min, and cure and solidify to obtain a cement solidified body of...

Embodiment 2

[0088] 1) Add 16 kg of simulated radioactive waste oil into a container containing 1 kg of polymer oil-absorbing material, stir at a constant speed for 10 min, and the linear speed of the stirring blade is 5 m / s. Let stand for 1h. Obtain polymer oil-absorbing material-simulated radioactive waste oil mixture;

[0089] 2) Mix 21kg composite Portland cement, 2kg zeolite powder, 5kg kaolin, and 3.8g polypropylene fiber to make 28kg cement-based solidified slurry material, and place 5.2kg simulated radioactive waste water in a high-speed pulper and stir for 4 minutes , the linear speed of the stirring blade of the high-speed pulping machine is 20m / s, and the cement-based solidified slurry is obtained;

[0090] 3) Add the cement-based solidified slurry into the container, mix it with the polymer oil-absorbing material-simulated radioactive waste oil mixture, stir the blade at a linear speed of 12m / s, stir for 10min, and cure and solidify to obtain a cement solidified body of simula...

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Abstract

The invention relates to the field of nuclear industry, in particular to a radioactive waste oil cement solidified body and a preparation method thereof. The radioactive waste oil cement solidified body of the present invention comprises the following components: 25-50 wt% cement; 10-50 wt% radioactive waste oil; 4-10 wt% zeolite powder; 8-20 wt% kaolin; 0.001-0.5 wt% % polypropylene fiber; 0.02-5wt% acrylate copolymer high oil-absorbing resin; 10-20wt% water. The preparation method is as follows: acrylic ester copolymer high oil-absorbing resin and radioactive waste oil form a mixture; cement, zeolite powder, kaolin, polypropylene fiber and water form a cement solidified slurry; the mixture is mixed with the cement solidified slurry. The invention converts the radioactive waste oil into a stable solid, and the compatibility of each component is good, and the radioactive waste oil is not easy to leach after forming a solidified body, thus better solving the problem of waste oil and nuclide leaching.

Description

technical field [0001] The invention relates to the field of nuclear industry, in particular to a radioactive waste oil cement solidified body and a preparation method thereof. Background technique [0002] With the development of my country's nuclear industry, a certain amount of radioactive waste oil will be produced during the operation, maintenance and decommissioning of nuclear facilities. Although its annual production is not large, it can only be temporarily stored in nuclear facility containers due to failure to get proper treatment and disposal, and its total amount is still huge over time. Radioactive waste oil includes high-viscosity lubricating oil, such as vacuum pump oil, engine oil, rail oil, etc.; and fuel oil with low flash point, such as gasoline, TBP / kerosene, diesel oil, engine oil, etc., and most of them are temporarily stored in the form of mixed oil. A large amount of TBP / kerosene and lubricating oil have accumulated in the reprocessing plant. Waste ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/16C04B28/04C04B28/06C04B28/34
CPCG21F9/165C04B28/04C04B28/06C04B28/34
Inventor 方祥洪黄锐刘强伍灵
Owner CPI YUANDA ENVIRONMENTAL PROTECTION ENG