A method for intensive recovery of valuable components from rare earth tailings

A technology for rare earth tailings and tailings, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve problems such as the inability to achieve effective comprehensive recovery of rare earth, lead, molybdenum and barium

Active Publication Date: 2021-04-20
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects and deficiencies of the prior art beneficiation method that cannot realize the effective and comprehensive recovery of rare earth tailings co-associated components rare earth, lead, molybdenum and barium, and provide an intensive recovery of valuable components in rare earth tailings. points method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a method for intensively recovering valuable components from rare earth tailings, and the specific process is as follows.

[0034] Rare earth tailings from a certain place in China are selected, and the main mineral composition is bastnaesite, barite, fluorite, etc. The raw ore (rare earth tailings) has a molybdenum grade of 0.13%, a barite grade of 23.71%, and a lead grade of 0.69%. The ore is ground to -1.0mm and subjected to weak magnetic separation under a background magnetic field strength of 0.1T to obtain magnetite and weak magnetic Tailings of weak magnetic separation, high gradient wet magnetic separation of tailings of weak magnetic separation under the background magnetic field strength of 1.0T, to obtain high-strength magnetic separation concentrate and strong magnetic separation tailings, adjust the liquid-solid ratio of strong magnetic separation concentrate to 5:1, press For each ton of ore feed, add 90 grams of sodium hydroxide a...

Embodiment 2

[0036] This embodiment provides a method for intensively recovering valuable components from rare earth tailings, and the specific process is as follows.

[0037]Rare earth tailings from a certain place in China are selected, and the main mineral composition is bastnaesite, barite, fluorite, etc. Raw ore (rare earth tailings) molybdenum grade 0.15%, barite grade 24.2%, lead grade 0.71%, ore grinding to -1.0mm, under the background magnetic field strength of 0.15T weak magnetic separation, magnetite and weak magnetic Tailings, weak magnetic separation tailings in high gradient wet magnetic separation under the background magnetic field strength of 1.2T, to obtain strong magnetic separation concentrate and strong magnetic separation tailings, adjust the liquid-solid ratio of strong magnetic separation concentrate to 3:1, press For each ton of ore feed, add 100 grams of sodium sulfide as the leaching agent, control the temperature at 85°C, and leaching for 2 hours, then wash and ...

Embodiment 3

[0039] This embodiment provides a method for intensive recovery of valuable components in rare earth tailings, the specific process is as follows

[0040] Rare earth tailings from a certain place in China are selected, and the main mineral composition is bastnaesite, barite, fluorite, etc. The raw ore (rare earth tailings) has a molybdenum grade of 0.12%, a barite grade of 22.6%, and a lead grade of 0.65%. The ore is ground to -1.0mm and subjected to weak magnetic separation under a background magnetic field strength of 0.2T to obtain magnetite and weak magnetic Tailings, weak magnetic separation tailings in high gradient wet magnetic separation under the background magnetic field strength of 1.4T, to obtain strong magnetic separation concentrate and strong magnetic separation tailings, adjust the liquid-solid ratio of strong magnetic separation concentrate to 4:1, press For each ton of ore feed, add 120 grams of sodium hydroxide with a weight ratio of 1:1: sodium sulfide as a...

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Abstract

The invention relates to a method for intensively recovering valuable components from rare earth tailings. The method includes the following steps: S1, magnetic separation and enrichment of strong magnetic separation concentrate and strong magnetic separation tailings; S2, leaching to collect molybdenum molybdate solution and leaching slag; S3, rare earth gravity separation, flotation to obtain rare earth concentrate and Flotation of rare earth tailings; S4, lead leaching of lead-containing solution; S5, barium flotation to obtain barite concentrate and barite flotation tailings; invention through weak magnetic separation and strong magnetic separation to achieve useful components rare earth, The effective enrichment and intensive return of molybdenum, lead, and barium laid a good foundation for the subsequent centralized recovery; the use of leaching to recover molybdenum, combined with gravity separation and flotation, realized the effective recovery of rare earth minerals, and obtained high-grade and recovered Rare earth concentrate with high rate; lead recovery by leaching and barium recovery by flotation in leaching slag effectively and comprehensively recover rare earth, lead, molybdenum and barium, which are associated useful components in rare earth tailings, turning waste into treasure and playing a good role in reducing waste. Discharge effect, realize solid waste recycling.

Description

technical field [0001] The invention relates to the technical field of ore dressing, and more specifically, relates to a method for intensively recovering valuable components from rare earth tailings. [0002] technical background [0003] As a strategic resource in industry, rare earths are of great research value for their rational development and utilization. Although my country is rich in rare earth resources, due to defects in production technology and lack of knowledge of resources, there is a lot of waste in the process of self-mining and sorting rare earth ores, and the utilization rate of resources is low. For example, fluorite, barite, fine-grained rare earth ore, lead and other main valuable associated minerals in rare earth tailings remain in large quantities, and their grades are quite high, which has great utilization value. [0004] The Chinese patent with publication number CN104096633A discloses a beneficiation process for comprehensive resource recovery and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
CPCB03B7/00Y02P10/20
Inventor 王成行邱显扬胡真李汉文时晗汪泰李沛伦杨凯志邹坚坚姚艳清李强丘世澄
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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