Method and device for selectively extracting rare earth elements on surface of stainless steel
Through the combination of acidic solution and corrosion inhibitor, selective extraction of rare earth elements on the surface of stainless steel is achieved, and the problems of impurities introduction and matrix damage during rare earth extraction in the prior art are solved, and excellent results are obtained with high-purity rare earth products and low waste liquid volume.
CN119913359APending Publication Date: 2025-05-02RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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Patent Information
- Application Number
- CN202510114473.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-05-02
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Figure CN119913359A_ABST
Abstract
The invention provides a method and device for selectively extracting rare earth elements on the surface of stainless steel. The provided method comprises the following steps: mixing an acidic solution and a corrosion inhibitor according to a preset proportion, and reacting at a first preset temperature to obtain an extracting solution; enabling a stainless steel material loaded with a rare earth coating to be in contact with the extracting solution, and reacting at a second preset temperature to obtain an extracting reaction solution; and carrying out precipitation conversion on the extraction reaction liquid to obtain the rare earth oxide containing rare earth elements. The invention further provides a device for selectively extracting the rare earth elements on the stainless steel surface. By means of the method or device, the rare earth extraction rate can be larger than 99.9%, and the stainless steel matrix loss rate can be smaller than 0.1%.
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