Device for crushing and grinding uranium ores through assistance of 915MHz pulse microwave irradiation and control method

A pulsed microwave and uranium ore technology, which is applied in the device and regulation field of 915MHz pulsed microwave irradiation assisted grinding and grinding of uranium ore, can solve the problems of difficulty in dissociation of uranium minerals, slow heating, and generation of cracks, etc.

Active Publication Date: 2016-09-21
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When microwaves with lower power are used to treat uranium ores, the heat energy generated by microwave irradiation is conducted to the adjacent medium, which only plays a role of slow heating. The overall temperature rise of uranium ores is slow and the expansion is small, which cannot effectively dissociate or create cracks
If the irradiation heating time is longer, the excessively high temperature will cause phase transition of the components inside the uranium ore, and different components will re-adhere, coalesce, and sinter together, making the dissociation of uranium minerals more difficult

Method used

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  • Device for crushing and grinding uranium ores through assistance of 915MHz pulse microwave irradiation and control method
  • Device for crushing and grinding uranium ores through assistance of 915MHz pulse microwave irradiation and control method
  • Device for crushing and grinding uranium ores through assistance of 915MHz pulse microwave irradiation and control method

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Embodiment 1

[0036] Example 1 : A CK-611 magnetron was used with a rated power of 20 kW, an anode voltage of 12.5 kV, an anode current of 2.8 A, a filament voltage of 12.5 V, and a current of 115 A. The cooling method is water cooling, and the magnetic field strength is 127 mT~131 mT. The anode high-voltage power supply adopts 24-level superimposed output mode, and the output voltage of each level is -600 V. A total of 21 levels are used. The synchronous modulation method proposed by the present invention is used to generate pulsed microwaves to irradiate volcanic rock-type uranium ore. The repetition frequency is 500 Hz, and the pulse width is 500 Hz. is 500 μS, the duty cycle is 50%, the magnetic field coil current is 2.2A, the effective value of the output anode current is 4 A, and the microwave power is 2.52 times of the rated power.

Embodiment 2

[0037] Example 2 : Use a CK-611 magnetron with a rated power of 20 kW, an anode voltage of 12.5 kV, an anode current of 2.8 A, a filament voltage of 12.5V, and a current of 115A. The cooling method is water cooling, and the magnetic field strength is 127mT~131mT. The anode high-voltage power supply adopts 24-stage superimposed output mode, and the output voltage of each stage is 600 V. The pre-excitation + modulation voltage mode proposed by the present invention is used to generate pulsed microwaves to irradiate volcanic rock-type uranium ore. The pre-excitation voltage is 10.8 kV, the modulation voltage is 1200 V, the repetition frequency is 1000 Hz, the pulse width is 100 μS, the duty cycle is 10%, the effective value of the output anode current is 5.9 A, and the microwave power is 3.54 of the rated power. times.

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Abstract

The invention relates to a device for crushing and grinding uranium ores through assistance of 915MHz pulse microwave irradiation and a control method. The device comprises five main parts of: a 915MHz microwave source generator, a microwave circulator, a water load, wave guide tubes and a microwave resonant heating cavity. After the uranium ores are irradiated by high-power pulse microwave emitted by the device, the mechanical strength of the uranium ores is reduced, the dissociation degree of the uranium ores is increased, and the crushing and the grinding of the uranium ores and the leaching of uranium minerals are facilitated. Compared with traditional continuous microwave irradiation, the pulse microwave irradiation is lower in consumption and better in assistance of the crushing and grinding effect, and can effectively prevent high-temperature sintering.

Description

Technical field [0001] The present invention involves a 915MHz pulse microwave sources to assist the grinding uranium ore. Background technique [0002] The uranium in the southern hard rock uranium ore is mainly extracted with stirring and pile of immersion.Crushing and grinding treatment of uranium ore is one of the most effective and simple means to improve uranium minerals.However, due to the high hardness of uranium ore, conventional grinding treatment, high energy consumption, large equipment wear, and low degree of dissipation of uranium minerals, uranium resources cannot be efficient and rapidly immersed.At the same time, once the uranium remaining in the tailings is released, it will cause radioactive pollution to the surrounding environment.During the pile and mixing and immersion process, the uranium minerals in uranium ore can only be exposed to the dissolving agent with the help of the dissolving agent with the help of the pores or being fully dissolved.Therefore, ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/18B02C25/00
CPCB02C19/18B02C25/00
Inventor 胡南丁德馨陈文光李广悦杨雨山喻清李峰王永东
Owner NANHUA UNIV
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