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Flotation separation method for bastnaesite and barite

A bastnasite and separation method technology, applied in flotation, solid separation and other directions, can solve the problems of hindering flotation separation, large dosage of chemicals, and high production costs, and achieve enhanced inhibition effect, enhanced action site, and improved recovery. rate effect

Active Publication Date: 2021-11-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual flotation process, since bastnaesite and barite are semi-soluble salt minerals with high solubility, the dissolved components interact with the mineral surface and flotation agents, resulting in the natural floatability of the two. Similarly, flotation separation is more difficult. In addition, bastnaesite and barite are easy to muddy during the grinding process, which will also hinder the flotation separation of the two.
The existing separation process of inhibiting barite flotation bastnaesite often has problems such as complex flotation process, large dosage of chemicals, high production cost and unsatisfactory beneficiation indicators

Method used

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  • Flotation separation method for bastnaesite and barite
  • Flotation separation method for bastnaesite and barite
  • Flotation separation method for bastnaesite and barite

Examples

Experimental program
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Embodiment 1

[0030] In this example, the bastnaesium-type rare earth ore flotation ore from a rare earth dressing plant in Sichuan is used as the selected raw ore. Its REO content is 25.33%, barite content is 35.25%, and it also contains a small amount of gangue such as quartz, fluorite, and calcite. mineral.

[0031] The flotation separation method of bastnaesite and barite described in the present embodiment specifically comprises the following steps:

[0032] (1) Weigh 500g of selected raw ore for grinding, process the ore fineness to -0.074mm, accounting for 80%, transfer the mineral raw materials to the flotation tank, and adjust the pulp concentration to 35%.

[0033] (2) During the flotation process, first adjust the pH value of the pulp to 6.0, add a compound inhibitor of 1000g / t (the mass ratio of polyaluminum chloride to water glass is 4:1), act for 5 minutes, and then add the activator lead nitrate 150g / t, act for 4 minutes, then add composite collector 1600g / t (the mass ratio ...

Embodiment 2

[0038]Mineral raw materials in this embodiment: use bastnaesium type rare earth ore flotation ore from a rare earth dressing plant in Sichuan as the selected raw ore, with REO content of 20%, barite content of 30%, and a small amount of quartz, fluorite and calcite and other gangue minerals.

[0039] The flotation separation method of bastnaesite and barite described in the present embodiment specifically comprises the following steps:

[0040] (1) Weigh 500g of raw ore, and process the ore fineness to -0.074mm, accounting for 85%; transfer the mineral raw materials to the flotation tank, and adjust the concentration of the ore pulp to 40%;

[0041] (2) During the flotation process, first adjust the pH value of the pulp to 8.5, add 800g / t of composite inhibitor (the mass ratio of polyaluminum ferric chloride to water glass is 7:1), act for 4 minutes, and then add activator nitric acid Lead 100g / t, act for 3 minutes, then add composite collector 1000g / t (the mass ratio of sali...

Embodiment 3

[0046] Mineral raw materials in this embodiment: use bastnaesium type rare earth ore flotation ore from a rare earth dressing plant in Sichuan as raw ore, with REO content of 30%, barite content of 40%, and a small amount of quartz, fluorite and calcite and other gangue minerals.

[0047] The flotation separation method of bastnaesite and barite described in the present embodiment specifically comprises the following steps:

[0048] (1) Weigh 500g of raw ore, and process the fineness of the ore to -0.074mm, accounting for 83%; transfer the mineral raw materials to the flotation tank, and adjust the concentration of the ore pulp to 30%.

[0049] (2) During the flotation process, first adjust the pH value of the slurry to 9.5, add 1200g / t of composite inhibitor (the mass ratio of polyaluminum iron silicate to water glass is 8:1), act for 5 minutes, and then add activator nitric acid Lead 200g / t, act for 4 minutes, then add composite collector 2000g / t (the mass ratio of salicyli...

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Abstract

The invention discloses a flotation separation method for bastnaesite and barite, which belongs to the technical field of rare earth flotation. The method comprises the following steps of adjusting the pH value of ore pulp to 6.0-9.5, adopting a mixture of water glass and one of polyaluminum chloride, polyaluminum ferric chloride and polyaluminum ferric silicate as a composite inhibitor of barite, and adopting lead nitrate as an activating agent of bastnaesite, adding a mixture of salicylhydroxamic acid, benzohydroxamic acid and sodium lauroyl sarcosinate or sodium lauroyl amino acid to serve as a bastnaesite composite collecting agent, and effectively separating the bastnaesite and barite through the flotation process of one-time roughing, two-time sweeping and two-time refining. The flotation separation method is simple in process structure, economical, and reasonable. The grade and the recovery rate of bastnaesite can be effectively improved, and bastnaesite concentrate with the rare earth content of 60%-68% and the recovery rate of 80%-85% can be obtained through flotation separation under the condition that the bastnaesite content of fed ore is 20%-30% and the barite content of fed ore is 30%-40%.

Description

technical field [0001] The invention relates to a flotation separation method for bastnaesite and barite, belonging to the technical field of bastnaesite flotation. Background technique [0002] Known as "industrial vitamins", rare earths are widely used in petroleum, chemical industry, metallurgy, textile, ceramics, glass, permanent magnet materials and other fields, and are strategic resources for economic and military development. With the continuous development of rare earth resources, easy-to-select rare earth ore resources are increasingly exhausted. Existing rare earth resources generally have problems such as severe mudification, complex ore composition, high gangue content, difficult separation, and low recovery rate of rare earth. [0003] Therefore, the processing and efficient recovery of rare earth resources has always been a hot and difficult point in the mineral processing industry. Bastnaesite is one of the main rare earth minerals that can be used for indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D101/00B03D101/02B03D101/04B03D101/06B03D103/02
CPCB03D1/018B03D2201/06B03D2201/00B03D2201/04B03D2201/02B03D2203/025
Inventor 刘洋魏志聪胡显智字富庭解子花王泽雷张强白睿李梦宇
Owner KUNMING UNIV OF SCI & TECH
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