A kind of microwave solidification method of uranium tailings reservoir beach surface

Abstract

The invention discloses a microwave curing method for the beach surface of a uranium tailings reservoir. The beach surface of the uranium tailings reservoir is stratified and directional microwave solidified through a deep microwave heating system and a surface microwave heating system, and finally the entire beach surface is sintered. And achieve the effect of volume reduction through sintering treatment; when the present invention carries out deep microwave solidification on the beach surface of uranium tailings reservoir, firstly, the whole beach surface is punched and dotted, and then the circular horn feeding port is deep into the hole successively to treat the uranium tailings. Depth sintering is carried out on the beach surface of the reservoir; when performing microwave solidification on the surface of the beach surface of the uranium tailings reservoir, a large area of ​​sintering is realized through the square horn feeder; the present invention finally realizes the sintering treatment of the entire beach surface through deep microwave solidification and surface microwave solidification. The treatment effect is good. In addition, the present invention also has the characteristics of fast heating speed, short sintering time, timely control, sensitive response, strong penetrating ability, high energy utilization rate and less secondary waste generation.

Description

technical field [0001] The invention relates to a method for treating the beach surface of a uranium tailings reservoir, in particular to a microwave curing method for the beach surface of a uranium tailings reservoir. Background technique [0002] Uranium mining and metallurgy facilities are an important part of the nuclear fuel cycle system, among which the uranium tailings pool is a prominent problem of potential major safety hazards caused by the nuclear industry to the environment and the public. As a long-term potential source of radioactive pollution, the uranium tailings pond has posed a major threat to the safety of the ecological environment. [0003] Due to the huge amount of uranium mining and metallurgy waste, the method of treating high-level radioactive waste liquid cannot be collected, solidified, isolated and disposed of. It can only be treated in situ covering for isolation and stabilization; in situ disposal mainly uses soil, gravel Cover the exposed tail...

AI Technical Summary

Problems solved by technology

[0003] Due to the huge amount of uranium mining and metallurgy waste, the method of treating high-level radioactive waste liquid cannot be collected, solidified, isolated and disposed of. It can only be treated in situ covering for isolation and stabilization; in situ disposal mainly uses soil, gravel Cover the exposed tailings with stone, asphalt, cement and other materials, then plant vegetation, and strengthen the dam body, build necessary waterproof and flood prevention facilities, so that the tailings can be closed in the tailings pond stably for a long time to achieve controlγ Radiation Levels and Suppression 222 The purpose of precipitation of Rn and preventing environmental pollution caused by collapse and loss caused by natural forces or other reasons; however, the radioactive hazards of a large number of uranium decay products stored in the site still exist for a long time. In addition, due to my country's vast territory and changeable climate, For example, the southern region of our country is severely soaked and scoured by rainwater, with many farmland ponds and dense population, while in the arid region of Northwest China, there is a lot of wind and sand, severe rainstorms and mountain torrents, and the ecological environment is very fragile. Therefore, the degree of coverage and stabilization requirements Higher; some of the tailings ponds that have been treated have problems such as coverage failure due to factors such as rain erosion, animal and plant damage, and may cause serious pollution to the surrounding environment at any time. The new technology of long-term stability and safety of the living environment and isolation is the key to the decommissioning and treatment of uranium tailings ponds

[0004] The invention patent with the authorized announcement number CN102844819B introduces a microwave-enhanced system, method and equipment for the pyrolysis and vitrification of radioactive materials, which reduces the The volume of radioactive waste is small; the microwave heating device of the invention comprises: a microwave source, a waveguide and a tank, but the invention is suitable for pyrolysis and liquefaction of solid radioactive waste for the purpose of stabilizing the waste for safe storage and disposal; the system receives and The number of layers of treated solid waste feed is limited by the size of the tank. When the solid waste feed settled in the tank has been treated, the tank needs to be sealed and stored or disposed of according to the appropriate regulations, so the device is not suitable for large Treatment of tailings pond beach surface of the area

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