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Transfer and adsorption method for radioactive elements in tailings in high-cold and high-altitude areas

A radioactive element, high-altitude technology, applied in radioactive purification, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problem of low transfer rate of radioactive element thorium, and achieve easy control and increase of component concentration Adsorption performance, avoiding the effect of high cost

Pending Publication Date: 2021-11-09
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the technical problem of low transfer rate of radioactive element thorium in the prior art, and provides a method for transferring and adsorbing radioactive elements in tailings in high-cold and high-altitude areas

Method used

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  • Transfer and adsorption method for radioactive elements in tailings in high-cold and high-altitude areas
  • Transfer and adsorption method for radioactive elements in tailings in high-cold and high-altitude areas

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Embodiment 1

[0037] A method for transferring and adsorbing radioactive elements in tailings in high-cold and high-altitude areas, comprising the following steps:

[0038] (S.1) It was selected from a certain lead-zinc tailings in Tibet. Due to the influence of the high cold and high altitude in Tibet, the tailings containing radioactive thorium should be heated and dried in an oven at 100°C for 12 hours, and then the tailings Grinding to a tailings material with a particle size of less than 0.45 mm, and then adding water to prepare a tailings slurry with a concentration of 60 wt%.

[0039] (S.2) Immerse the tailings slurry into the hydrofluoric acid-sulfuric acid system, the volume ratio of hydrofluoric acid to sulfuric acid in the hydrofluoric acid-sulfuric acid system is 1:1, and the mass of tailings slurry to the volume of hydrofluoric acid The ratio is 1 g: 4ml, and the pH value is controlled at 3, the leaching time is 2h, and the leaching temperature is 70°C, so that the radioactive ...

Embodiment 2

[0045] A method for transferring and adsorbing radioactive elements in tailings in high-cold and high-altitude areas, comprising the following steps:

[0046] (S.1) It was selected from a lead-zinc tailings mine in Tibet. Due to the influence of the high cold and high altitude in Tibet, the tailings containing the radioactive element thorium should be heated and dried in an oven at 105°C for 24 hours, and then the tailings should be ground. Tailings material with a particle size of less than 0.45mm, and then add water to prepare tailings slurry with a concentration of 70 wt%.

[0047] (S.2) Immerse the tailings slurry into the hydrofluoric acid-sulfuric acid system, the volume ratio of hydrofluoric acid to sulfuric acid in the hydrofluoric acid-sulfuric acid system is 1:10, and the mass of tailings slurry to the volume of hydrofluoric acid The ratio is 1 g: 15ml, and the pH value is controlled at 5, the leaching time is 4h, and the leaching temperature is 90°C, so that the rad...

Embodiment 3

[0053] A method for transferring and adsorbing radioactive elements in tailings in high-cold and high-altitude areas, comprising the following steps:

[0054] (S.1) It was selected from a lead-zinc tailings mine in Tibet. Due to the influence of the high cold and high altitude in Tibet, the tailings containing the radioactive element thorium should be heated and dried in an oven at 102°C for 15 hours, and then the tailings should be ground. Tailings material with a particle size of less than 0.45mm, and then add water to prepare tailings slurry with a concentration of 65wt%.

[0055] (S.2) Immerse the tailings slurry into the hydrofluoric acid-sulfuric acid system, the volume ratio of hydrofluoric acid to sulfuric acid in the hydrofluoric acid-sulfuric acid system is 1:5, and the mass of tailings slurry to the volume of hydrofluoric acid The ratio is 1 g: 10ml, and the pH value is controlled at 4, the leaching time is 3 hours, and the leaching temperature is 80°C, so that the ...

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Abstract

The invention relates to the field of radioactive pollutant removal, in particular to a transfer and adsorption method for radioactive elements in tailings in high-cold and high-altitude areas, which comprises the following steps: (S.1) tailings containing a radioactive element thorium are heated and dried, ground, and added with water to obtain tailing slurry; (S.2) the tailing pulp is immersed into a hydrofluoric acid-sulfuric acid system, so that the radioactive element in the tailings is leached out; (S.3) after the tailings are filtered out, adsorption microspheres are added into the leachate to adsorb the radioactive element; and (S.4) the adsorption microspheres are filtered out to complete the transfer of the radioactive element, wherein the adsorption microspheres in the step (S.3) are nano iron oxide / graphene oxide / chitosan composite microspheres. According to the method, leaching of the radioactive element thorium can be accelerated through the hydrofluoric acid-sulfuric acid system, meanwhile, the adsorption rate of thorium in the leachate can be greatly increased by adopting the nano iron oxide / graphene oxide / chitosan microsphere adsorption material, and efficient adsorption of the radioactive element thorium is achieved.

Description

technical field [0001] The invention relates to the field of removing radioactive pollutants, in particular to a method for transferring and adsorbing radioactive elements in mine tailings in high-cold and high-altitude areas. Background technique [0002] Tailings are wastes discharged by mining enterprises under certain technical and economic conditions, but at the same time they are potential secondary resources. Since tailings are the residues of ores after sorting and processing, the grades of valuable metal elements are low and the mineral phases are complex. The utilization of tailings often requires large investment and low returns, which is a problem faced by my country's current resource industry. . The comprehensive recovery and treatment of tailings can not only eliminate its serious pollution to the environment, but also effectively utilize the secondary resources in it. It is an important method to realize the circular economy of my country's mining industry. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/12G21F9/30B01J20/06B01J20/20B01J20/24B01J20/28B01J20/30
CPCG21F9/30G21F9/12B01J20/28021B01J20/06B01J20/20B01J20/24B01J20/28007B01J20/28011B01J20/28057B01J20/30B01J20/3007
Inventor 翁仁贵黄鑫旦增吕学斌
Owner FUJIAN UNIV OF TECH
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