Flotation method of zinc oxide ore

A technology for zinc oxide ore and ore, which is applied in the field of flotation of zinc oxide ore, can solve the problems of large aeration volume, increase the difficulty of target minerals, poor selectivity of target minerals, etc., so as to reduce the dosage and improve the concentrate grade and recovery rate. , the effect of good selection indicators

Inactive Publication Date: 2016-11-16
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mineralization of air bubbles requires the collision of air bubbles and mineral particles. When the two approach, they break through the barrier of the hydration film, causing the hydration film to break and form two-phase contact. The difficulty of the target mineral adsorbed on the air bubbles
The generation of bubbles in conventional flotation mainly comes from the mechanical agitation of the flotation machine and external aeration, which is characterized by a large amount of aeration, but the selectivity of the bubbles to the target minerals is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The flotation of a zinc oxide ore in Lanping, Yunnan (zinc mainly exists in the form of smithsonite) undergoes the following steps:

[0019] Crush and grind the zinc oxide raw ore until the ore with a size of less than 0.074mm accounts for 65% of the total ore mass, dissociate the constituent mineral monomers, and then adjust the pulp concentration to 10wt%; add dispersant water glass 300g / t, vein Stone mineral inhibitor sodium hexametaphosphate 200g / t, stir for 2 minutes; then add flocculant carboxymethyl cellulose in an amount of 20mg / L, stir at a high speed of 3000 rpm for 5 minutes; add in an amount of 5kg per ton of raw ore Pregelatinized starch, after stirring evenly, add sulfuric acid to adjust the pH value of the pulp to 1; stir at a low speed of 1000 rpm for 2 minutes, then add collector butyl xanthate 50g / t and foaming agent No. 2 oil 15g / t, after Conventional flotation to obtain zinc concentrate.

[0020] The grade of the obtained zinc concentrate reaches 35...

Embodiment 2

[0022] The flotation of a zinc oxide ore in Guangxi (zinc mainly exists in the form of smithsonite) undergoes the following steps:

[0023] Crush and grind the zinc oxide raw ore until the ore whose size is less than 0.074mm accounts for 75% of the total ore mass, dissociate the constituent mineral monomers, and then adjust the pulp concentration to 15wt%; add dispersant water glass 400g / t, vein Stone mineral inhibitor sodium hexametaphosphate 300g / t, stir for 2 minutes; then add flocculant carboxymethyl cellulose in an amount of 50mg / L, stir at a high speed of 3200 rpm for 5 minutes; add in an amount of 10kg per ton of raw ore For pregelatinized starch, stir evenly and add sulfuric acid to adjust the pH value of the pulp to 5; stir at a low speed of 600 rpm for 5 minutes, then add collector isopentyl xanthate 40g / t and foaming agent No. 2 oil 10g / t, Zinc concentrate is obtained by conventional flotation.

[0024] The grade of the obtained zinc concentrate reaches 38.9%, and ...

Embodiment 3

[0026] The flotation of a zinc oxide ore in Huize, Yunnan (zinc mainly exists in the form of zinc carbonate) undergoes the following steps:

[0027] Crush and grind the zinc oxide raw ore until the ore whose size is less than 0.074mm accounts for 85% of the total ore mass, dissociate the constituent mineral monomers, and then adjust the pulp concentration to 20wt%; add dispersant water glass 300g / t, vein Stone mineral inhibitor sodium hexametaphosphate 300g / t, stir for 2 minutes; then add flocculant carboxymethyl cellulose in an amount of 60mg / L, stir at a high speed of 3500 rpm for 5 minutes; add 2kg per ton of raw ore For pregelatinized starch, add sulfuric acid after stirring evenly, adjust the pH value of the pulp to 5; stir at a low speed of 800 rpm for 2 minutes, then add collector isoamyl xanthate 50g / t and foaming agent No. 2 oil 12g / t, Zinc concentrate is obtained by conventional flotation.

[0028] The grade of the obtained zinc concentrate reaches 34.1%, and the re...

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PUM

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Abstract

The invention provides a flotation method of zinc oxide ore. The method comprises the steps that in the pretreatment process of flotation, the zinc oxide ore is crushed and levigated firstly, and the slurry concentration is adjusted to range from 15wt% to 20wt%; a scattering agent and a gangue mineral inhibitor are added in sequence, and then a flocculating agent is added for selective flocculation; then pregelatinized starch is added, the mixture is evenly stirred, and then sulfuric acid is added to adjust the pH value of slurry to 1-5; and a collecting agent and a foaming agent are added after stirring is carried out at a low speed for 2-5 minutes, and zinc concentrate is obtained through flotation according to a conventional process. Through addition of the pregelatinized starch, stability of selective floccules is enhanced, then the sulfuric acid is added so that tight absorption between smithsonite and carbon dioxide microbubbles generated through a reaction can be achieved, and then zinc minerals-floccules are recovered through conventional flotation, so that the beneficiation index of the ore is increased, and consumption of the collecting agent and the foaming agent can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of mineral processing engineering, and in particular relates to a flotation method of zinc oxide ore. Background technique [0002] In recent years, with the continuous development of resources, the easy-to-treat zinc sulfide ore resources are increasingly exhausted, and it is imminent to expand the sorting and research of low-grade refractory zinc oxide ore. Flotation is currently the main method for processing lead-zinc oxide ores, but the selection index has not been ideal. This is mainly due to the strong hydrophilicity of the minerals, the thick surface hydration film, and the similar surface electrical properties to other oxide minerals. , resulting in little difference in floatability between them, and the selectivity of conventional collectors is poor; secondly, due to long-term oxidation and grinding process, there is a large amount of slime in the flotation pulp, and this part of fine slime Zinc m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D3/06B03B1/00B03B1/04B03D103/04
CPCB03B1/00B03B1/04B03D3/06B03D2203/04
Inventor 邓荣东胡元库建刚刘述忠左蔚然
Owner FUZHOU UNIV
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