Method for flotation after acid etching pretreatment of high-calcium fluorite

A pretreatment and post-flotation technology, applied in the field of comprehensive utilization of resources, can solve the problems of poor quality of fluorite concentrate, difficulty in separating fluorite and calcite, low recovery rate, etc., achieve high grade, high-efficiency enrichment and recovery high rate effect

Active Publication Date: 2016-02-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of difficult separation of fluorite and calcite in high-calcium fluorite, poor quality of fluorite concentrate, and low recovery rate, the present invention provid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Utilize this technological method to process the high-calcium fluorite of 15.46% of fluorite and 21.54% of calcite, in every ton of this high-calcium fluorite slurry, slowly add 2kg of dilute hydrochloric acid with a mass concentration of 20%, add inhibitor (water glass and hydroxy ethyl The mixed solution mass ratio of forked diphosphonic acid is 10:1) 500g, and stirring speed is 500r / min, then adds collector (the mixture mass ratio of kerosene, emulsified ricinoleic acid and sulfamic acid is 5:4:1) 200g, inflated and stirred for 3 minutes, the amount of aeration is 3m 3 / h, carry out aerated flotation, after the flotation is completed, further beneficiation is carried out. During the beneficiation process, sodium carbonate is added to adjust the pH of the pulp to 8.5, and then the mixed solution of water glass and hydroxyethylidene diphosphonic acid is added to carry out six refinements. The amount of inhibitor used in the process of refining 1 to 6 is 50g, 50g, 40g, ...

Embodiment 2

[0050] The process method is used to process high-calcium fluorite with 27.31% fluorite and 33.86% calcite. In this high-calcium fluorite pulp of per ton, slowly add the nitric acid 4kg of mass concentration 10%, add inhibitor (the mixed liquor mass ratio of water glass and hydroxyethylidene diphosphonic acid is 10:1) 500g simultaneously, stirring speed is 600r / min, then add collector (the mass ratio of kerosene, emulsified ricinoleic acid and sulfamic acid is 5:3:1) 300g, inflate and stir for 3min, the aeration volume is 4m 3 / h, then aerated flotation, after the flotation is completed, further concentrate, add sodium carbonate to adjust the pH of the pulp to be 9.0 in the concentrate process, then add inhibitor (the mixed solution of water glass and hydroxyethylidene diphosphonic acid), Six times of beneficiation were carried out, and the dosages of inhibitors in the process of refining one to six were respectively 50g, 50g, 40g, 40g, 30g, and 20g. The pH in the process of b...

Embodiment 3

[0052] The high-calcium fluorite with 22.56% fluorite and 31.55% calcite is processed by the process method. In each ton of this high-calcium fluorite pulp, slowly add 5 kg of hydrofluoric acid with a mass concentration of 5%, and simultaneously add 400 g of inhibitor (the mixed solution mass ratio of water glass and hydroxyethylidene diphosphonic acid is 10:2), and stir The speed is 300r / min, then add 300g of collector (the mass ratio of kerosene, emulsified ricinoleic acid and sulfamic acid is 4:3:1), inflate and stir for 5min, and the aeration volume is 5m 3 / h, then aerated flotation, after the completion of flotation, further selection, adding sodium carbonate to adjust the pH of the pulp is 9.5 in the selection process, then adding inhibitors (the mixed solution of water glass and hydroxyethylidene diphosphonic acid), Carry out eight times of beneficiation, the dosage of inhibitors in the process of refining one to eight is respectively 100g, 100g, 50g, 40g, 40g, 30g, 20...

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Abstract

The invention discloses a method for flotation after acid etching pretreatment of high-calcium fluorite. Acid is added into high-calcium fluorite pulp before flotation, inhibitors are added while the acid is added, and acid etching pretreatment is carried out; pH regulators and collecting agents are sequentially added after pretreatment is completed, and then air agitation pulp mixing is carried out; foam flotation is carried out after pulp mixing is completed, and rough concentrate is obtained; and the rough concentrate is further subjected to concentration to obtain high-quality fluorite concentrate. The method is clean, environmentally friendly, efficient and low in cost, and the obtained fluorite concentrate is high in grade and recovery rate.

Description

technical field [0001] The invention relates to a flotation method after acid leaching pretreatment of high-calcium fluorite, which belongs to the field of comprehensive utilization of resources. Background technique [0002] The chemical formula of fluorite is CaF 2 , is a kind of halide mineral, commonly known as zeolite, the molecular crystal structure is equiaxed crystal system, most of them are cubes and octahedrons, less rhomboid dodecahedrons, and a very small amount appears as granular or massive aggregates, and presents Vitreous luster, melting point about 1360°C, hardness about 4, density 3.18g / cm 3 . The color of fluorite ore depends on the impurities it contains, and it can be in various colors such as white, yellow, green, blue, purple, red, etc. [0003] Flotation is currently the only way to obtain acid-grade fluorspar powder in industry. At present, a lot of mineral processing research work is centered on how to find high-efficiency collectors for fluorsp...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03D1/02B03D101/06B03D101/02B03D103/04
CPCB03D1/018B03D1/02B03D2201/007B03D2201/02B03D2201/06B03D2203/04
Inventor 孙伟胡岳华韩海生耿志强刘航
Owner CENT SOUTH UNIV
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