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A method for recovering associated rhenium resources from the adsorption tail liquid of sandstone-type uranium ore in-situ leaching uranium mining process

An in-situ leaching technology for mining uranium and sandstone type is applied in the field of recovery of associated rhenium resources, which can solve the problems of difficulty in preparing high-purity ammonium perrhenate, complex synthesis process, low adsorption selectivity, etc., and achieve obvious social and economic benefits, The effect of high product purity and simple process flow

Active Publication Date: 2019-05-14
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Strongly basic anion exchange resin has strong selectivity for the adsorption of rhenium and molybdenum ions, but HClO is required 4 、HNO 3 or NH 4 The SCN solution elutes rhenium from the resin due to the introduction of ClO 4 - , NO 3 - and other impurity ions, it is difficult to prepare high-purity ammonium perrhenate [33] The weakly basic anion exchange resin has low adsorption selectivity to rhenium and molybdenum ions, but the rhenium-containing ions can be eluted from the resin with ammonia solution without introducing other impurity ions, and high-purity ammonium perrhenate can be obtained ; Chelating resin overcomes the disadvantages of poor selectivity and slow mass transfer speed of general ion exchange resins, but its synthesis process is complicated and its preparation cost is high

Method used

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  • A method for recovering associated rhenium resources from the adsorption tail liquid of sandstone-type uranium ore in-situ leaching uranium mining process
  • A method for recovering associated rhenium resources from the adsorption tail liquid of sandstone-type uranium ore in-situ leaching uranium mining process
  • A method for recovering associated rhenium resources from the adsorption tail liquid of sandstone-type uranium ore in-situ leaching uranium mining process

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The sandstone-type uranium ore containing associated rhenium resources is added to the 15g / L dilute sulfuric acid solution according to the ratio of uranium ore: leachate (volume ratio) = 1:10, 1g / L is added, and after 18 hours of shaking and soaking at room temperature, After filtration, an acidic mixed solution of uranium and rhenium is obtained. The slag is washed three times with a small amount of leaching solution, and the washing water is incorporated into the leaching solution to obtain an acidic mixed solution of uranium and rhenium and filter residue (the leaching rate of uranium in slag is 90%, the leaching rate of rhenium is 80%, pH=1.77 .Eh=533mv). Using D263 anion exchange resin as the adsorbent, using the saturated re-adsorption process, the uranium and rhenium in the leaching solution are adsorbed, and 6% ammonium nitrate (NH 4 NO 3 ) after desorbing uranium, the resin returns to the adsorption process after transformation. After a certain cycle period...

Embodiment 2

[0048] The sandstone-type uranium ore containing associated rhenium resources is added to the 20g / L dilute sulfuric acid solution according to the ratio of uranium ore: leachate (volume ratio) = 1:12, 1.5g / L is added, and after soaking at room temperature for 20 hours , after filtration, the acidic mixed solution of uranium and rhenium was obtained. The slag is washed three times with a small amount of leaching solution, and the washing water is incorporated into the leaching solution to obtain an acidic mixed solution of uranium and rhenium and filter residue (the leaching rate of uranium in slag is 92%, the leaching rate of rhenium is 84%, pH=1.68 .Eh=541mv). Using D263 anion exchange resin as the adsorbent, using the saturated re-adsorption process, the uranium and rhenium in the leaching solution are adsorbed, and 6% ammonium nitrate (NH 4 NO 3 ) after desorbing uranium, the resin returns to the adsorption process after transformation. After a certain cycle period, the ...

Embodiment 3

[0050] The sandstone-type uranium ore containing associated rhenium resources is added to the 20g / L dilute sulfuric acid solution according to the ratio of uranium ore: leachate (volume ratio) = 1:8, 2g / L is added, and after 16 hours of shaking and soaking at normal temperature, After filtration, an acidic mixed solution of uranium and rhenium is obtained. The slag is washed three times with a small amount of leaching solution, and the washing water is incorporated into the leaching solution to obtain an acidic mixed solution of uranium and rhenium and filter residue (the leaching rate of uranium in slag is 91%, the leaching rate of rhenium is 83%, pH=1.69 .Eh=535mv). Using D263 anion exchange resin as the adsorbent, using the saturated re-adsorption process, the uranium and rhenium in the leaching solution are adsorbed, and 6% ammonium nitrate (NH 4 NO 3 ) after desorbing uranium, the resin returns to the adsorption process after transformation. After a certain cycle perio...

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Abstract

The invention discloses a method for recovering associated rhenium resources from sandstone-type uranium ore in-situ leaching uranium mining process lean resin. The sandstone-type uranium ore is added to a sulfuric acid solution containing an oxidant, and shaken and soaked for a certain period of time at a certain temperature. , use anion exchange resin to adsorb uranium rhenium in the leaching solution, and use ammonium nitrate solution to desorb uranium in the resin after the resin is saturated, return to the adsorption process after the lean resin is transformed, use sodium hydroxide to precipitate the desorbed uranium concentrate, and remove the uranium in the resin The rhenium is desorbed to obtain a concentrated ammonium rhenate solution, and the ammonium rhenate product is obtained after recrystallization. The invention has a simple technological process and is easy for large-scale production; the product has high purity, the total recovery rate of rhenium in the leaching solution is as high as over 80%, the reagents used are environmentally friendly, and have obvious social and economic benefits.

Description

technical field [0001] The invention relates to the field of hydrometallurgy, in particular to a method for recovering associated rhenium resources from the adsorption tail liquid of sandstone-type uranium ore in-situ leaching uranium mining process technical background [0002] Rhenium is a precious scattered metal with high melting point, high strength, good plasticity and excellent mechanical stability. It is widely used in important fields such as national defense, aviation, aerospace, petrochemical and electronic industries, especially petroleum heavy Whole catalysts and superalloys account for the majority of rhenium consumption. Rhenium is a silver-white metal, but the color of powdered rhenium is between gray and brown. Rhenium metal has a close-packed hexagonal crystal structure. Rhenium is very hard, corrosion-resistant, wear-resistant, has good ductility, and can maintain high hardness and ductility at low temperatures, and maintains high strength and good resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B61/00C22B60/02C22B3/08C22B3/42C22B3/44C22B3/40
CPCC22B3/08C22B3/42C22B3/44C22B60/0234C22B60/0265C22B60/0278C22B61/00C22B3/26Y02P10/20
Inventor 花榕张志宾罗明标乐长高刘云海阳奕汉徐屹群蒋小辉
Owner EAST CHINA UNIV OF TECH
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