Multi-component recovery and ore dressing method for iron tailings of associated rare earth minerals

A technology for iron tailings and rare earths, applied in chemical instruments and methods, solid separation, wet separation, etc., to achieve the effects of reducing the content of harmful impurities, increasing the grade and recovery rate, and improving the comprehensive utilization rate

Active Publication Date: 2018-09-28
NORTHEASTERN UNIV
View PDF9 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention aims to solve the problem of comprehensive utilization of iron tailings associated rare earth minerals, to fully utilize useful resources in iron tailings associated rare earth minerals and to improve the recovery rate of useful minerals in existing processes. Comprehensive recovery of valence elements provides a new path

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-component recovery and ore dressing method for iron tailings of associated rare earth minerals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this example, the tailings in the Baiyun Obo tailings pond are used as raw materials, in which the grade of iron (TFe) is 15.62%, and the grade of fluorite (CaF 2 ) grade is 19.30%, rare earth (REO) grade is 6.87%. Utilize the method of the present invention to finally obtain the fluorite concentrate with a fluorite grade of 95.26% and a recovery rate of 82.23%; the rare earth concentrate with a rare earth grade of 66.54% and a recovery rate of 83.12%; the iron grade of 64.89% and a recovery rate of 87.65% % iron ore concentrate; Concretely comprises the following steps:

[0039] (1) Slurry the tailings in the Baiyun Obo tailings pond and perform mixed flotation operation, add water glass with inhibitor 0.50kg / t, sodium oleate with collector 0.35kg / t, adjuster 0.50kg / t t of sodium carbonate to obtain mixed flotation concentrates and mixed flotation tailings, respectively.

[0040] (2) The mixed flotation concentrate obtained in step (1) is fed into a strong magneti...

Embodiment 2

[0047] In this example, the tailings in the Baiyun Obo tailings pond are used as raw materials, in which the grade of iron (TFe) is 13.47%, and the grade of fluorite (CaF 2 ) grade is 22.45%, rare earth (REO) grade is 6.56%. Utilize the method of the present invention to finally obtain the fluorite concentrate with a fluorite grade of 96.46% and a recovery rate of 80.26%; the rare earth concentrate with a rare earth grade of 63.58% and a recovery rate of 87.26%; the iron grade of 63.69% and a recovery rate of 86.76% % iron ore concentrate; Concretely comprises the following steps:

[0048] (1) Slurry the tailings in the Baiyun Obo tailings pond and perform mixed flotation operation, add water glass with inhibitor 0.45kg / t, sodium oleate with collector 0.45kg / t, adjuster 0.40kg / t t of sodium carbonate to obtain mixed flotation concentrates and mixed flotation tailings, respectively.

[0049] (2) The mixed flotation concentrate obtained in step (1) is fed into a strong magneti...

Embodiment 3

[0056] In this example, the tailings in the Baiyun Obo tailings pond are used as raw materials, in which the grade of iron (TFe) is 15.62%, and the grade of fluorite (CaF 2 ) grade is 19.30%, rare earth (REO) grade is 6.87%. Utilize the method of the present invention to finally obtain the fluorite concentrate with a fluorite grade of 95.26% and a recovery rate of 82.23%; the rare earth concentrate with a rare earth grade of 66.54% and a recovery rate of 83.12%; the iron grade of 64.89% and a recovery rate of 87.65% % iron ore concentrate; Concretely comprises the following steps:

[0057] (1) Slurry the tailings in the Baiyun Obo tailings pond and perform mixed flotation operation, add inhibitor 0.50kg / t water glass, collector 0.35kg / t sodium oleate, adjuster 0.50kg / t carbonic acid Sodium, respectively to obtain mixed flotation concentrate and mixed flotation tailings.

[0058] (2) The mixed flotation concentrate obtained in step (1) is fed into a strong magnetic separator,...

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 relates to a multi-component recovery and ore dressing method for iron tailings of associated rare earth minerals, and belongs to the field of mineral machining engineering and comprehensive recovery and utilization of resources. The method comprises the steps that the iron tailings of the associated rare earth minerals are subjected to bulk flotation of rare earth minerals and fluorite minerals to obtain bulk flotation concentrates and bulk flotation tailings; the bulk flotation concentrates are subjected to high-intensity magnetic separation at magnetic field strength of 0.4-1.0T to obtain high-intensity magnetic separation concentrates and high-intensity magnetic separation tailings; the high-intensity magnetic separation concentrates are subjected to rare earth flotationto obtain rare earth flotation concentrates and rare earth flotation tailings, high-intensity magnetic separation tailings are subjected to fluorite flotation to obtain fluorite flotation concentratesand fluorite flotation tailings; and the bulk flotation tailings after being dewatered and dried are roasted in reducing atmosphere, the minerals obtained after roasting are subjected to low-intensity magnetic separation at 0.1-0.3T to obtain low-intensity magnetic concentrates and low-intensity magnetic tailings. Three concentrates, that is, rare earth concentrates, fluorite concentrates and iron concentrates and niobium-rich slag are finally obtained so as to improve the comprehensive utilization ratio of the iron tailings of the associated rare earth minerals.

Description

technical field [0001] The invention relates to a multi-component recovery and dressing method for iron tailings of associated rare earth minerals, which belongs to the field of mineral processing engineering and resource comprehensive recovery and utilization. Background technique [0002] The representative of iron ore with associated rare earth minerals is Baiyan Obo Iron Mine, which is rich in rare earth, iron, niobium, fluorite and other minerals. Previously, the utilization of Baiyan Obo Iron Mine was limited to the recovery of iron and some rare earths. Therefore, there are still considerable reserves of useful minerals such as iron, rare earths, and fluorspar in the tailings pond. The recovery rate of other minerals is not ideal, and a large amount of useful minerals continue to be piled into the tailings pond, which is not only a waste of resources but also aggravates the damage to the environment. [0003] The content of rare earth minerals in the Baiyan Obo taili...

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): B03B7/00C22B1/10
CPCB03B7/00C22B1/10
Inventor 韩跃新李文博单彦李艳军
Owner NORTHEASTERN UNIV
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