Method for recycling associated rhenium resources from sandstone-type uranium deposit in-situ leaching uranium exploration process adsorption tail liquid

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

Active Publication Date: 2016-11-23
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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  • Method for recycling associated rhenium resources from sandstone-type uranium deposit in-situ leaching uranium exploration process adsorption tail liquid
  • Method for recycling associated rhenium resources from sandstone-type uranium deposit in-situ leaching uranium exploration process adsorption tail liquid
  • Method for recycling associated rhenium resources from sandstone-type uranium deposit in-situ leaching uranium exploration process adsorption tail liquid

Examples

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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 recycling associated rhenium resources from sandstone-type uranium deposit in-situ leaching uranium exploration process lean resin. Sandstone-type uranium deposits are added into a sulfuric acid solution containing an oxidizing agent. After vibration soaking is carried out for a period at a certain temperature, anion exchange resin is used for adsorbing uranium and rhenium in leachate. After the resin is saturated, an ammonium nitrate solution is used for desorbing the uranium in the resin. The lean resin returns to the adsorption process after transforming. The desorbed uranium concentrated solution is precipitated by adopting sodium hydroxide, the rhenium in the resin is desorbed, the concentrated ammonium rhenate solution is obtained, and ammonium rhenate products are obtained after recrystallization. The method is simple in process and capable of realizing large-scale production easily. The products are high in purity, the overall recovery rate of the rhenium in the leachate reaches 80% or above, reagents used in the process are environmentally friendly, and remarkable social benefits and economical benefits are achieved.

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 Applications(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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