Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of pyrochlore type man-made rock solidified body

An artificial rock and pyrochlore technology, applied in radioactive purification, nuclear engineering, etc., can solve the problems of volatile nuclear fission products, environmental pollution, complicated operation process, etc., to reduce the risk of environmental pollution, low sintering temperature, and easy operation simple effect

Active Publication Date: 2013-04-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The entire operation process of this method is complicated, and the nuclear fission products are easy to volatilize under high pressure and high temperature, which may easily cause the risk of environmental pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of pyrochlore type man-made rock solidified body
  • Preparation method of pyrochlore type man-made rock solidified body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take by weighing the raw materials that form the pyrochlore type artificial rock substrate according to the following formula: titanium oxide is 44.4g, zirconium oxide is 2.8g, barium oxide is 1.1g, aluminum oxide is 0.7g and calcium oxide is 9.9g; Perform wet ball milling for 28 hours, and dry to obtain a uniformly mixed powder with a particle size of less than 0.5 μm;

[0030] The simulant of 98.6g high-level radioactive waste-the cerous nitrate crystal (the mass fraction that its oxide form accounts for in formula is 41.1%) with 6 crystalline waters, add 52mL water and be prepared into solution, as the simulated high radioactive waste;

[0031] Add the mixed powder of pyrochlore-type artificial rock substrate prepared above into the simulated highly radioactive waste liquid prepared above to form a slurry with a solid phase volume fraction of 35%, and add 1.47g of organic monomer acrylamide while stirring and 0.07g of cross-linking agent N,N'-methylenebisacrylamide,...

Embodiment 2

[0037] Take by weighing the raw materials that form the pyrochlore type artificial rock substrate according to the following formula: titanium oxide is 33.3g, zirconium oxide is 2.1g, barium oxide is 0.8g, aluminum oxide is 0.6g and calcium oxide is 7.4g; Perform wet ball milling for 20 hours, and dry to obtain a uniformly mixed powder with a particle size of less than 3 μm;

[0038] The simulant of 140.8g high-level radioactive waste-the cerous nitrate crystal with 6 crystalline waters (the mass fraction of its oxide form in the formula is 55.8%), added 73.8mL water to prepare a solution, as the simulated highly radioactive liquid waste;

[0039] Add the mixed powder of pyrochlore-type artificial rock substrate prepared above into the simulated highly radioactive waste liquid prepared above to form a slurry with a solid phase volume fraction of 30%, and add 1.32g of organic monomer acrylamide while stirring and 0.05g of cross-linking agent N,N'-methylenebisacrylamide, and st...

Embodiment 3

[0045] Weigh the raw materials forming the pyrochlore type artificial rock substrate according to the following formula: titanium oxide is 59.0g, zirconium oxide is 3.8g, barium oxide is 1.4g, aluminum oxide is 1.0g and calcium oxide is 13.1g; Perform wet ball milling for 20 hours, and dry to obtain a uniformly mixed powder with a particle size of less than 0.6 μm;

[0046]The simulant of 54.8g high-level radioactive waste-the cerous nitrate crystal with 6 crystalline waters (the mass fraction of its oxide form in the formula is 21.7%), add 56.3mL water to prepare a solution, as the simulated highly radioactive liquid waste;

[0047] Add the mixed powder of pyrochlore-type artificial rock substrate prepared above into the simulated highly radioactive waste liquid prepared above to form a slurry with a solid phase volume fraction of 40%, and add 0.78g of organic monomer acrylamide while stirring and 0.08g of cross-linking agent N,N'-methylenebisacrylamide, and stirred for 30mi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a pyrochlore type man-made rock solidified body. The method comprises the steps of: preparing evenly mixed compositional powder of a pyrochlore type man-made rock base material; adding the mixed powder into a highly radioactive waste liquid, and simultaneously adding an organic monomer and a crosslinking agent, and mixing them evenly; adding an initiator, conducting standing to perform gelatination; after complete gelatination, carrying out dehydration drying; putting a dried gel into an air furnace to perform sintering; and finally implementing furnace cooling. The preparation method disclosed in the invention can make the solidified body directly dried and molded, and the process can be finished in one air furnace. The sintering temperature is low, and the sintering time is short, so that energy is substantially saved. Particularly, the risk of environmental pollution caused by heating volatilization of highly radioactive substances is reduced, and the security of solidified body preparation is greatly improved. In addition, the preparation method provided in the invention has the advantages of simple operation, no need of special equipment and strict requirements, thus being in line with the requirements of industrialized production.

Description

technical field [0001] The invention relates to a preparation method of an artificial rock solidification body, in particular to a preparation method of a pyrochlore-type artificial rock solidification body. Background technique [0002] The vitrification of highly radioactive liquid waste has been industrialized in some countries, and our country has also built a cold bench for the vitrification of highly radioactive waste liquid, and started cold experiments. However, due to the increasing construction and operating costs of the high-level radioactive waste deep geological repository, it is uneconomical to vitrify the high-level liquid waste as a whole. Therefore, it is currently considered more feasible to separate the long-lived actinides from the high-heat-releasing fission elements (90Sr, 137Cs) in the high-level radioactive waste liquid, conduct deep geological disposal after solidification, and use the remaining large-volume waste liquid as For low- and medium-level...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/622C04B35/46G21F9/16G21F9/06
Inventor 吴平萍蒋丹宇张骋粘洪强
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI