In-situ leaching uranium exploitation comprehensive recovery technology

A technology for in-situ leaching and mining of uranium, which is applied in the field of in-situ leaching and mining of uranium, and can solve the problems of effective recovery of difficult metal rhenium, waste of resources, etc.

Inactive Publication Date: 2018-10-19
中核通辽铀业有限责任公司
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Problems solved by technology

The current production process is difficult to achieve effectiv

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  • In-situ leaching uranium exploitation comprehensive recovery technology

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Embodiment 1

[0045] A comprehensive recovery process for uranium from in-situ leaching, comprising the following process steps:

[0046] 1. Adsorption of rhenium

[0047] The rhenium-containing adsorption tail liquid passes through the adsorption tower, and the flow rate is controlled at 5BV / h; the rhenium concentration in the adsorption tail liquid is 0.74mg / L, the uranium concentration is 0.92mg / L, and the pH value is 2.10; the macroporous anion exchange resin D355 adsorption solution is used rhenium in the adsorption tower, until the concentration difference of rhenium in the outlet liquid of the adsorption tower and the rhenium in the liquid inlet is ≤2%, the adsorption is stopped to obtain a rhenium-containing saturated resin.

[0048] 2. Rhenium-containing saturated resin leaching

[0049] Use 42g / L NaNO at 40°C 3 and 60g / LH 2 SO 4 The mixed solution is used as eluting agent to elute the rhenium-containing saturated resin; the flow rate is controlled at 0.4BV / h to obtain a uraniu...

Embodiment 2

[0057] A comprehensive recovery process for uranium from in-situ leaching, comprising the following process steps:

[0058] 1. Adsorption of rhenium

[0059] The rhenium-containing adsorption tail liquid passes through the adsorption tower, and the flow rate is controlled at 6BV / h; the rhenium concentration in the adsorption tail liquid is 0.54 mg / L, the uranium concentration is 0.56 mg / L, and the pH value is 1.95; Rhenium, until the concentration difference between the concentration of rhenium in the effluent of the adsorption tower and the influent is ≤ 2%, the adsorption is stopped.

[0060] 2. Rhenium-containing saturated resin leaching

[0061] Use 50g / L NaNO at 50℃ 3 and 80g / L H 2 SO 4The mixed solution was used as eluent to wash the saturated resin; the flow rate was controlled at 0.3BV / h to obtain a uranium-rhenium mixed solution with a leaching volume of 3.8BV; the uranium concentration was 98.6mg / L, and the rhenium concentration was 23.2mg / L.

[0062] 3. Uranium...

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Abstract

The invention relates to the technical field of in-situ leaching uranium exploitation and particularly discloses an in-situ leaching uranium exploitation comprehensive recovery technology which comprises the following steps: 1, adopting resin to adsorb rhenium; 2, leaching saturated resin; 3,carrying out extraction on uranium-rhenium mixing solution; 4, carrying out back-extraction on a rhenium-containing organic phase; and 5, obtaining potassium rhenate. With adoption of the in-situ leaching uranium exploitation comprehensive recovery technology, rhenium enrichment is realized, concentrationof rhenium in rhenium-containing product solution reaches more than 1000 times of concentration of rhenium in rhenium-containing adsorption tail liquid, separation of uranium and rhenium is realized through the extraction technology, and more than 99% of uranium is left on an extraction raffinate water phase and does not enter the organic phase.

Description

technical field [0001] The invention belongs to the technical field of uranium mining by in-situ leaching, and in particular relates to a comprehensive recovery process for uranium mining by in-situ leaching, which recovers metal rhenium from uranium-containing adsorption tail liquid. Background technique [0002] Due to its unique properties, rhenium metal is widely used in the fields of national defense, aerospace, high energy physics and nuclear industry. In nature, the mineral resources of rhenium are scarce, and the abundance in the earth's crust is only 7×10 -8 , and most rhenium exists in the form of impurities. At present, there are few kinds of raw materials for extracting rhenium, mainly flue gas washing liquid and rhenium-containing molybdenum ore in copper pyrometallurgy. With the development of industry, the demand for rhenium is increasing day by day, and the market price reaches 60-70 million yuan / ton. [0003] Years of research and practice have shown that...

Claims

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Application Information

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IPC IPC(8): C22B3/42C22B3/28C22B60/02C22B61/00
CPCC22B3/42C22B60/02C22B61/00C22B3/28
Inventor 苏学斌原渊张勇汤庆四阮志龙闫纪帆李喜龙张万亮高险峰董惠琦
Owner 中核通辽铀业有限责任公司
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