Rare earth mine sediment and roasting extracting process

An extraction process and rare earth ore technology, applied in the field of rare earth ore precipitation roasting extraction process, can solve the problems of incomplete precipitation and long precipitation process, and achieve the effect of accelerating the precipitation speed and improving the precipitation efficiency

Inactive Publication Date: 2018-01-23
云南省核工业二0九地质大队
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chemical precipitation is an important process for rare earth extraction, but in the precipitation process, problems such as incomplete precipitation and long precipitation process often occur. Cross-linking reaction, as a technology for molecular aggregation, is often used in the precipitation process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Collect the La-containing leachate from the downstream of the in-situ leaching ore deposit or the downstream of the percolation leaching, and pass the obtained rare earth ore leachate through a fine sieve for solid-liquid separation; the mesh of the fine sieve is 325 mesh, and obtain a solid-free rare earth ore leachate; Add sodium calcium hydroxide to the obtained solid-free rare earth ore leaching solution to adjust the pH value of the leaching solution to 5.1; carry out vacuum filtration and washing of the leaching solution after adjusting the pH value, and control the vacuum degree of the vacuum filtration at -0.1MPa, Obtain the washing liquid and remove impurities; adjust the temperature of the washing liquid to 35°C; adjust the temperature of the washing liquid by heating in a water bath, add starch to the washing liquid, and stir evenly; add sodium calcium hydroxide to the obtained leaching liquid to adjust the washing The pH value of the liquid is 10, and the rat...

Embodiment 2

[0031] Collect the mixture of Y-containing leachate and Er-containing leachate from the downstream of the in-situ leached ore deposit or the downstream of the percolation-leached ore deposit; the obtained rare earth ore leachate is carried out through a fine sieve for solid-liquid separation; the sieve of the fine sieve is 400 mesh, to obtain solid rare earth ore leachate; add calcium carbonate to the obtained rare earth ore leachate without solids, and adjust the pH value of the leachate to 5.2; vacuum filter and wash the leachate after adjusting the pH value, and the vacuum degree of the vacuum filter is controlled at -0.2MPa, to obtain the washing solution and remove impurities; adjust the temperature of the washing solution to 40°C; the method of adjusting the temperature of the washing solution is to heat in a water bath, add a flocculant in the washing solution, the flocculant is cellulose, and stir evenly; Calcium carbonate is added to the leaching liquid, the pH value o...

Embodiment 3

[0033] Collect the Sc-containing leachate from the downstream of the in-situ leached ore deposit or the downstream of the percolation leached ore deposit; pass the obtained rare earth ore leachate through a fine sieve for solid-liquid separation; the mesh of the fine sieve is 325 mesh, and obtain the rare earth ore leachate without solids; Add oxalic acid to the obtained solid-free rare earth ore leaching solution to adjust the pH value of the leaching solution to 5.2; carry out vacuum filtration and washing of the leaching solution after adjusting the pH value, and control the vacuum degree of the vacuum filtration at -0.3MPa to obtain the washing solution and remove impurities; adjust the temperature of the washing solution to 30°C; the method of adjusting the temperature of the washing solution is heating in a water bath, add chitosan to the washing solution, and stir evenly; add oxalic acid to the obtained leachate to adjust the pH value of the washing solution 11, control ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a rare earth mine sediment and roasting extracting process. The rare earth mine sediment and roasting extracting process comprises the following steps of collecting leachate; pretreating the leachate; adjusting the pH value of the leachate, specifically, the pH value of the leachate is adjusted to 5.1-5.2; filtering and purifying the leachate, specifically, the leachate obtained after pH value adjustment is subjected to vacuum filtration and cleaning, and a cleaning solution and purification residues are obtained; adjusting the temperature of the cleaning solution to 30-40 DEG C; adding flocculants into the cleaning solution, and stirring the cleaning solution evenly; adjusting the pH value of the cleaning solution for dynamic precipitation, specifically, the pH value of the cleaning solution is adjusted to 9-11, the increasing speed of the pH value is controlled to be 1-2 / h, dynamic precipitation is conducted, vacuum filtration and cleaning are conducted afterwards, and precipitation residues and supernatant are obtained; and roasting the precipitation residues, specifically, the obtained precipitation residues are put into a roasting furnace to be roasted,and the materials obtained after roasting are rare earth element oxides. According to the rare earth mine sediment and roasting extracting process, the flocculants are added in the precipitation process for cross-linking reaction, the precipitation speed is increased, and the precipitation efficiency is improved. As the organic flocculants are added, the organic flocculants burn and volatilize inthe roasting process, and extraction of the rare earth is not affected.

Description

technical field [0001] The invention belongs to rare earth extraction technology, in particular, relates to a rare earth ore precipitation roasting extraction process. Background technique [0002] As an important strategic resource, rare earths are increasingly attracting widespread attention at home and abroad. Rare earths are the lanthanide elements in the periodic table of chemical elements-lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm ), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu ), and two elements closely related to the 15 elements of the lanthanide series - scandium (Sc) and yttrium (Y), a total of 17 elements, called rare earth elements (RareEarth), referred to as rare earth (RE or R). [0003] Chemical precipitation is an important process for rare earth extraction, but in the precipitation process, problems such as incomplete p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B3/04C22B3/44C22B1/02
CPCY02P10/20
Inventor 李明晓刘凤祥王学武王刚李余华龙庆兵李新仁瞿亮蒋国祥谭伟王宏锋杨庆超
Owner 云南省核工业二0九地质大队
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap