A 915 MHz pulsed microwave irradiation assisted grinding device and control method for uranium ore

A technology of pulsed microwave and uranium ore, applied in grain processing, etc., can solve the problems of difficult dissociation of uranium minerals, inability to dissociate uranium minerals, and slow heating of uranium ore

Active Publication Date: 2018-06-01
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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  • A 915 MHz pulsed microwave irradiation assisted grinding device and control method for uranium ore
  • A 915 MHz pulsed microwave irradiation assisted grinding device and control method for uranium ore
  • A 915 MHz pulsed microwave irradiation assisted grinding device and control method for uranium ore

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Embodiment 1

[0036] Example 1: 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 12.5 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: A CK-611 magnetron is 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 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 invention relates to a device and method for assisting grinding of uranium ore by irradiation of a 915MHz pulsed microwave source. Background technique [0002] The uranium in the hard rock uranium ore in southern my country is mainly extracted by stirring and heap leaching processes, but the uranium minerals mainly exist in the inside of the uranium ore particles and are in the form of packages. Crushing and grinding of uranium ore is one of the most effective and convenient means to increase the degree of dissociation of uranium minerals. However, due to the high hardness of uranium ore, conventional crushing treatment requires high energy consumption, heavy equipment wear, and low dissociation degree of uranium minerals, so uranium resources cannot be leached efficiently and quickly. At the same time, once the uranium remaining in the tailings is released, it will cause radioactive pollution to the surrounding environment. In the process of he...

Claims

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Application Information

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Patent Type & Authority Patents(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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