Abstract
This paper presents an application of radioisotopes with reference to the determination of the solid phase volumetric concentration in a hydromixture by calibration of the measuring set. It shows how the gamma absorption equipment consisting of radioactive isotopes 241 Am and scintillation probe, may be applied to the measurement of solid particles volumetric concentration in a flow. It is based on fact that the intensity of a gamma beam decreases as it passes through matter. In the described experiments as solid phase the ceramic models representing natural polymetallic ocean nodules were used. The especially constructed calibration stand and obtained relation between the related intensity of radiation and mean volumetric concentration of the solid phase are presented.
Highlights
Polymetallic nodules occur on the bottom of seas and oceans
This paper presents an application of radioisotopes with reference to the determination of the solid phase volumetric concentration in a hydromixture by calibration of the measuring set
It shows how the gamma absorption equipment consisting of radioactive isotopes 241Am and scintillation probe, may be applied to the measurement of solid particles volumetric concentration in a flow
Summary
Polymetallic nodules occur on the bottom of seas and oceans. They are solid structures of organic and mineral compositions which contain a various metals (mostly Mn, Si, Fe, Al, Na, Mg, Ni, K, Cu) [1,2,3,4]. To determination of the solid phase volumetric flow rate in pipeline it is necessary to know the volumetric concentration of nodules and their velocity. For this purpose the method based on gamma ray absorption was proposed [5,6,7,8,9,10]. Using two sets of source - probe presented in figure 1 we can measure the averaged velocity of the solid phase [6,7,8,9,10]. In the described experiments as solid phase the ceramic models representing three grain sizes (up to 70 mm) of natural polymetallic ocean nodules was used.
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