Unlock instant, AI-driven research and patent intelligence for your innovation.

Removal method of impurity aluminum in cerium biscarbonate rare earth ore leaching process

A technology of cerium fluorocarbonate and rare earth ore, which is applied in the field of rare earth, can solve the problems of lower product yield and high operating cost of aluminum removal, and achieve the effects of increased product yield, low operating cost and simple process

Active Publication Date: 2017-01-18
LESHAN SHENGHE RARE EARTH CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for removing impurity aluminum in the ore leaching process of cerium fluorocarbonate rare earth ore, so as to solve the problems of high operating cost and lower product yield in the existing method for removing aluminum

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

[0037] (1) Use hydrochloric acid to extract cerium fluorocarbonate rare earth maglev ore to obtain rare earth material liquid.

[0038] (2) Add barium sulfate to the obtained rare earth material liquid, the addition amount is barium sulfate: rare earth oxide=1:1000, and detect the iron content in the rare earth material liquid to ensure that the iron in the rare earth material liquid: rare earth oxide=1:76.

[0039] (3) Add a small amount of ammonia water to the rare earth material liquid, adjust the pH to 4.6, stir evenly and filter.

[0040] (4) Al in the liquid obtained after filtration 2 O 3 The content is 48ppm.

Embodiment 2

[0042] (1) Use hydrochloric acid to extract cerium fluorocarbonate rare earth magnetic separation to obtain rare earth material liquid.

[0043] (2) Add barium sulfate to the obtained rare earth material liquid, the addition amount is barium sulfate: rare earth oxide=1:800, and detect the iron content in the rare earth material liquid to ensure that the iron in the rare earth material liquid: rare earth oxide=1:55.

[0044] (3) Add a small amount of ammonia water to the rare earth material liquid, adjust the pH to 4.9, stir evenly and filter.

[0045] (4) Al in the liquid obtained after filtration 2 O 3 The content is less than 32ppm.

Embodiment 3

[0047] (1) Use hydrochloric acid to extract cerium fluorocarbonate rare earth magnetic separation to obtain rare earth material liquid.

[0048] (2) Add barium sulfate to the obtained rare earth material liquid, the addition amount is barium sulfate: rare earth oxide=1:100, and detect the iron content in the rare earth material liquid to ensure that the iron in the rare earth material liquid: rare earth oxide=1:99.

[0049] (3) Add a small amount of ammonia water to the rare earth material liquid, adjust the pH to 4.7, stir evenly and filter.

[0050] (4) Al in the liquid obtained after filtration 2 O 3 The content is less than 35ppm.

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 method for removing impurity-aluminum in a CeFCO3 rare earth ore leaching process. The method comprises the following steps: (1) leaching CeFCO3 rare earth ore with hydrochloric acid to obtain a rare earth feed liquid; (2) adding barium sulfate into the obtained rare earth feed liquid, wherein the ratio of barium sulfate to rare earth oxide is equal to 1:1000-1:100, detecting the content of iron in the rare earth feed liquid, and ensuring the ratio of iron to rare earth oxide in the rare earth feed liquid to be more than or equal to 1:100; and (3) adding ammonium hydroxide into the rare earth feed liquid, adjusting the pH to be 4.5-5.0, stirring uniformly and filtering. The characteristic of aluminum element in the rare earth ore is researched, seed crystal and coprecipitates are added, the aluminum element is precipitated at certain pH, and the rare earth element is ensured not to be precipitated.

Description

Technical field [0001] The invention belongs to the field of rare earths, and in particular relates to a method for removing impurity aluminum in the leaching process of a fluorine cerium carbonate rare earth ore. Background technique [0002] After leaching cerium fluoride rare earth ore with hydrochloric acid, the mixed rare earth chloride liquid is produced. The mixed rare earth chloride liquid enters the extraction for multi-stage extraction and separation. The aluminum element is extracted and immersed in the praseodymium chloride-neodymium liquid, and then the praseodymium chloride -The neodymium liquid undergoes multi-stage extraction to separate and remove aluminum. [0003] The aluminum content in the original process is uncontrollable in the mixed rare earth chloride in the fluorinated cerium rare earth ore leaching process. After hydrochloric acid leaching and extraction separation, the aluminum element is enriched in the praseodymium chloride-neodymium liquid. The alum...

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 Patents(China)
IPC IPC(8): C22B3/44C22B59/00
CPCY02P10/20
Inventor 杜元忠曾明汤朝文童贵全朱利兵王静宋福宝刘艳蔡红艳
Owner LESHAN SHENGHE RARE EARTH CO LTD