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Combined reagent and flotation method for flotation of ultra-low grade rare earth ore and application of combined reagent

A combination of reagents and rare earth ore technology, applied in flotation, solid separation, etc., can solve the problems of low grade of rare earth concentrate, waste of rare earth resources, pollution of the environment, etc., achieve good flotation effect, save costs and resources, and use in pharmaceuticals less effect

Active Publication Date: 2020-01-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in view of the existing ultra-low-grade rare earth tailings flotation, the currently adopted reagent system and flotation process need to add a large amount of reagents, which wastes reagents and pollutes the environment
In addition, due to the low grade of rare earth concentrates, most of the low-grade rare earth tailings can only be directly discharged into the tailings pond, which not only causes a waste of rare earth resources, but also pollutes the environment and brings harm to the tailings treatment. huge challenge

Method used

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  • Combined reagent and flotation method for flotation of ultra-low grade rare earth ore and application of combined reagent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 2000g of rare earth tailings, the rare earth REO grade is 0.157%, add 1000ml of water for wet grinding, and grind for 4 minutes, so that the grinding fineness is -0.074mm and accounts for 68%. First, add 750g / t sodium carbonate to the pulp to adjust the pH value of the pulp to 9.01, add 500g / t inhibitor water glass to the pulp, and stir for 3 minutes. Add 300g / t and 100g / t benzohydroxamic acid and octyl hydroxamic acid respectively in sequence, stir for 6 minutes, and carry out rough flotation for 5 minutes. For its rare earth roughing tailings, first add 200g / t of water glass, stir for 3 minutes, then add 100g / t and 50g / t of benzohydroxamic acid and octylhydroxamic acid in turn, stir for 5 minutes, and then carry out Flotation for 4 minutes. The final rare earth REO grade was raised from 0.157% to 18.76%, and the enrichment ratio was as high as 120.

Embodiment 2

[0034] Take 2000g of rare earth tailings, the rare earth REO grade is 0.157%, and add 1000ml of water for wet grinding, so that the grinding fineness is -0.074mm, accounting for 68%. First, add 750g / t sodium carbonate to the pulp to adjust the pH value of the pulp to 9.6, add 500g / t water glass to the pulp, stir for 3 minutes, then add 350g / t and 150g / t benzohydroxamic acid and octyl in turn hydroxamic acid, stirred for 6 minutes, and flotation was carried out for 5 minutes. For its rare earth roughing tailings, first add 200g / t of water glass, stir for 3 minutes, then add 200g / t and 80g / t of benzohydroxamic acid and octylhydroxamic acid respectively, stir for 5 minutes, and then carry out Flotation for 4 minutes. The final rare earth REO grade was raised from 0.163% to 19.59%, and the effect was ideal.

Embodiment 3

[0040] Take 2000g of rare earth tailings, the rare earth REO grade is 0.157%, add 1000ml of water for wet grinding, and grind for 4 minutes, so that the grinding fineness is -0.074mm and accounts for 78.34%. First, add 750g / t sodium carbonate to the pulp to adjust the pH of the pulp to 9.01, add 500g / t water glass to the pulp, stir for 3 minutes, then add 300g / t and 100g / t benzyl hydroxamic acid and octyl respectively hydroxamic acid, stirred for 6 minutes, and flotation was carried out for 5 minutes. For its rare earth roughing tailings, first add 200g / t of water glass, stir for 3 minutes, then add 100g / t and 50g / t of benzohydroxamic acid and octylhydroxamic acid in turn, stir for 5 minutes, and then carry out Flotation for 4 minutes. The final rare earth REO grade was raised from 0.157% to 20.34%, and the enrichment ratio was as high as 120.

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Abstract

The invention belongs to the technical field of mineral resource recycling and utilization and in particular relates to a combined reagent and a flotation method for flotation of an ultra-low grade rare earth ore and application of the combined reagent. The combined reagent is composed of two chemicals, namely benzohydroxamic acid and octyl hydroxamic acid in a mass ratio of (2:1)-(4:1). The invention further provides application of the combined reagent. Under identical flotation conditions, the combined reagent is capable of remarkably increasing the grade of the ultra-low grade rare earth ore, the use amount of the reagent is small, the cost can be reduced, resources can be saved, and the application range of rare earth ores can be widened.

Description

technical field [0001] The invention belongs to the technical field of mineral resources recovery and utilization, and in particular relates to a combined reagent for flotation of ultra-low-grade rare earth ores, a flotation method and an application thereof. Background technique [0002] Rare earth is an important strategic resource in the world, commonly known as "industrial vitamin". At present, rare earths are widely used and irreplaceable in the fields of permanent magnet materials, hydrogen storage materials, superconducting materials, fluorescent materials and special glasses. [0003] Although my country is a country rich in rare earth resources, and its rare earth reserves rank among the top in the world, with the continuous development of rare earth resources, high-quality rare earth resources are increasingly depleted. In addition, there are still many problems in the development of rare earth resources in my country. Unreasonable mining methods lead to low utili...

Claims

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Application Information

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IPC IPC(8): B03D1/01B03D1/02B03D101/02B03D103/04
CPCB03D1/01B03D1/025B03D2201/02B03D2203/04
Inventor 蒋昊韩文平向国源高雅罗汇丰
Owner CENT SOUTH UNIV
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