Technique for recycling rare earth from rare earth mining wastewater by resin adsorption method

A mining wastewater and resin adsorption technology, applied in the direction of process efficiency improvement, solid adsorbent liquid separation, separation methods, etc., can solve problems such as destruction, waste of resources, and impact on the surrounding ecology of the mining area, and achieve simple process and low production cost Effect

Inactive Publication Date: 2010-10-27
LONGNAN COUNTY NANYU RARE EARTH RESOURCES COMPREHENSIVE UTILIZATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for many years, due to the waste water produced by mining and the residual ore left after the mining of rare earths, the self-flowing waste water contains 0.01-0.15g / L rare earths. The surrounding ecology wastes precious resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: Adsorb 450M with 1000Kg resin 3 Take the rare earth wastewater with a concentration of 0.05g / L as an example.

[0014] 1. Adsorption facilities

[0015] Wastewater collection sedimentation tank, ammonium sulfate preparation tank, ion exchange column, rare earth sedimentation tank.

[0016] 2. Process and steps

[0017] A. Main raw materials: 732 cation resin (strongly acidic styrene-based cation exchange resin), ammonium sulfate, and ammonium bicarbonate.

[0018] B. Process steps:

[0019] 1. Wastewater collection: 450M of rare earth mining wastewater with a rare earth concentration of 0.05g / L was measured 3 Flow into the collection pool through the pipeline and settle;

[0020] 2. Resin pretreatment: Soak 1000Kg resin in 2M hydrochloric acid for 4 hours for pretreatment;

[0021] 3. Resin column packing: load the pretreated resin into two 1M×2.5M ion exchange columns;

[0022] 4. Adsorption of rare earth ions: Slowly add the settled waste water in...

Embodiment 2

[0026] Embodiment 2: Adsorb 450M with 2000Kg resin 3 Take the rare earth wastewater with a concentration of 0.1g / L as an example.

[0027] 1. Adsorption facilities

[0028] Wastewater collection sedimentation tank, ammonium sulfate preparation tank, ion exchange column, rare earth sedimentation tank, etc.

[0029] 2. Process and steps

[0030] A. Main raw materials: 732 cationic resin, ammonium sulfate, ammonium bicarbonate.

[0031] B. Process steps:

[0032] 1. Wastewater collection: 450M of rare earth mining wastewater with a rare earth concentration of 0.1g / L was measured 3 Flow into the collection pool through the pipeline and settle;

[0033] 2. Resin pretreatment: Soak 2000Kg resin in 2M hydrochloric acid for 4 hours for pretreatment.

[0034] 3. Resin column loading: load the pretreated resin into four 1M×2.5M ion exchange columns;

[0035] 4. Adsorption of rare earth ions: Slowly add the settled waste water into the resin column through the head tank, and the f...

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PUM

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Abstract

The invention relates to a technique for recycling rare earth from rare earth mining wastewater by a resin adsorption method, which comprises the following steps: collecting wastewater, pretreating resin, carrying out column packing of resin, and adsorbing rare earth ions; monitoring, desorbing resin, and settling rare earth in the adsorption process; and adding ammonium bicarbonate to deposit the rare earth, wherein the mass ratio of rare earth to ammonium bicarbonate is 1:3. The technique for recycling rare earth from rare earth mining wastewater by resin adsorption method of the invention has the advantages of low production cost and simple technique, and can adsorb more than 20 Kg of rare earth everyday by using 1 ton of resin. The invention can recycle rare earth and purify water in remnant mine regions after mining rare earth.

Description

technical field [0001] The invention relates to a technique for recovering rare earth from rare earth mining waste water by resin adsorption method. technical background [0002] The mining of ion-adsorbed rare earths in the south has a history of more than 30 years. It has developed from a backward "pool leaching process" that destroys the ecological environment to a more scientific and relatively ecologically protective "in-situ leaching" process. But for many years, due to the waste water produced by mining and the residual ore left after the mining of rare earths, the self-flowing waste water contains 0.01-0.15g / L rare earths. The surrounding ecology wastes precious resources. Contents of the invention [0003] The object of the present invention is to provide a process for recovering rare earths from rare earth mining waste water by resin adsorption method which can not only recover rare earths but also purify water quality. [0004] The resin adsorption method of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42B01D15/04C22B59/00
CPCY02P10/20
Inventor 钟化云许瑞高
Owner LONGNAN COUNTY NANYU RARE EARTH RESOURCES COMPREHENSIVE UTILIZATION CO LTD
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