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Determining method and measuring device for particle accumulation emanation medium radon migration physical parameters

A technology of particle accumulation and ejection medium, which can be used in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc.

Active Publication Date: 2016-12-07
NANHUA UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the measurement methods of these four physical parameters are relatively complicated. For example, the determination of the production rate of mobile radon also needs to determine other intermediate parameters: radium content, emanation coefficient and density of the medium; at the same time, each physical parameter needs to be determined independently. experimental device
Therefore, it takes a lot of manpower, material resources and time to measure these four physical parameters one by one.

Method used

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  • Determining method and measuring device for particle accumulation emanation medium radon migration physical parameters
  • Determining method and measuring device for particle accumulation emanation medium radon migration physical parameters
  • Determining method and measuring device for particle accumulation emanation medium radon migration physical parameters

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Embodiment Construction

[0088] A method for determining the physical parameters of radon migration in the particle accumulation type emanation medium. Here, two samples are taken as examples to illustrate the determination of the physical parameters of the particle accumulation type emanation medium radon migration.

[0089] Sample 1: The ore from the new heap leaching pile. The minerals in the ore are composed of hydrothermal minerals and residual minerals of surrounding rocks. The mineral analysis data provided by the mine show that the main uranium minerals are pitchblende and a small amount of secondary minerals of uranium. And symbiotic with pyrite, quartz, etc. The sample density used in this experiment is 2.61×10 3 kg / m 3 , the particle size is 0mm ~ 9mm, the uranium grade is about 0.145%, and the uranium-radium balance coefficient is about 1.04.

[0090] Sample 2: The sandy loam used in the experiment comes from Crouching Tiger Mountain, University of South China. The radium content of the...

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Abstract

The invention relates to a determining method and measuring device for particle accumulation emanation medium radon migration physical parameters. The method and the device may simultaneously determine the radon diffusion coefficient, the migration radon production rate, the medium permeability and the porosity of such medium. Measurement is performed by an experimental apparatus to determine the medium bottom hole radon concentration and the radon concentration of surface ambient air under the condition of pure diffusion equilibrium, the radon concentration value of the circulating gas and the gas pressure gradient of the medium at different times of two closed recirculation volumes. Then, the porosity [epsilon] of the porous medium, migration radon [alpha] generated by unit volume porous medium, the permeability k of the porous medium, and a diffusion coefficient D are used. The method may simultaneously determine multiple physical parameters. The device is simple in structure, low in manufacture and repair cost, and easy to operate.

Description

technical field [0001] The invention belongs to the field of simulation and control of radon migration in porous emanating media, and specifically relates to a method for determining physical parameters of radon migration in sandy soil, waste rock heaps, ore heaps and tailings heaps, and other particle accumulation-type emanating media, and a measuring device. Especially for the determination method and measuring device of radon diffusion coefficient, mobile radon generation rate, permeability and porosity of sandy soil, waste rock heap, ore heap and tailings heap and other particle accumulation emanation media. Background technique [0002] Radon is a radioactive gas. When people inhale it, the α particles produced by the decay of radon will cause radiation damage to the respiratory system and induce lung cancer. Radon is one of the 19 major carcinogens announced by the World Health Organization (WHO), and is the second leading cause of human lung cancer after cigarettes. ...

Claims

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Application Information

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IPC IPC(8): G01D21/02G01N15/08
CPCG01D21/02G01N15/08G01N15/088
Inventor 叶勇军张运锋代鑫涛丁德馨李乐梁涛苏杭尹安松
Owner NANHUA UNIV
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