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An electrochemical flotation method for recovering lead-sulfur mixed concentrate from high-grade lead-zinc ore

A technology for mixing concentrate and high grade, applied in flotation, solid separation and other directions, can solve the problems of high foam viscosity, slow pyrite flotation, and low pyrite recovery rate in the separation stage, and achieves a reduction in dosage, The effect of low cost and strong ore adaptability

Active Publication Date: 2020-11-10
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the flotation speed of galenite and pyrite is slow, especially the recovery rate of pyrite is low, and the phenomenon of channel crossing is easy to occur. Entering the zinc selection stage will affect the grade of zinc concentrate and seriously affect the separation index.
It is also easy to cause the foam to be viscous and difficult to separate during the separation stage.

Method used

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  • An electrochemical flotation method for recovering lead-sulfur mixed concentrate from high-grade lead-zinc ore
  • An electrochemical flotation method for recovering lead-sulfur mixed concentrate from high-grade lead-zinc ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This implementation takes a high-lead, high-zinc, high-sulfur refractory ore as an example, the raw ore lead grade is 6.73%, zinc grade is 19.65%, and iron grade is 15.30%.

[0022] 1) Grinding the high-grade lead-zinc-sulfur raw ore in the production backwater medium with a ball mill, the grinding fineness -0.074mm accounts for 70%, and obtains the ore slurry;

[0023] Production backwater is the backwater produced by water quality recycling during production by this method, and its water hardness is ≤150mg / L, lead ion concentration ≤1mg / L, zinc ion concentration 0.1-0.3mg / L, COD 700-900mg / L, The dissolved oxygen content is 7.2-8.3mg / L.

[0024] 2) Introduce the ore pulp into the mixing tank, add zinc sulfate and carry out aeration and stirring treatment for 10 minutes. After the pulp potential and dissolved oxygen value meet the requirements, that is, the pulp potential is 200mV (SHE), and the dissolved oxygen content is 8.0mg / L, pre-float the lead. After 3 minutes, ...

Embodiment 2

[0027] This implementation takes a high-lead, high-zinc, high-sulfur refractory ore as an example, the raw ore lead grade is 6.53%, zinc grade is 19.78%, and iron grade is 15.44%.

[0028] 1) Grinding the high-grade lead-zinc-sulfur raw ore in the production backwater medium with a ball mill, the grinding fineness -0.074mm accounts for 68%, and obtains the ore slurry;

[0029] Production backwater is the backwater produced by water quality recycling during the production of this method, its water hardness is 150-250mg / L, lead ion concentration is 1-4mg / L, zinc ion concentration is 0.1-0.3mg / L, COD 800-1200mg / L L, dissolved oxygen content 6.5-7.5mg / L.

[0030] 2) Introduce the ore pulp into the mixing tank, add zinc sulfate and carry out aeration and stirring treatment for 8 minutes. After the pulp potential and dissolved oxygen value meet the requirements, that is, the pulp potential is 170mV (SHE), and the dissolved oxygen content is 7.7mg / L. After 3 minutes of extraction, a...

Embodiment 3

[0033] This implementation takes a high-lead, high-zinc, high-sulfur refractory ore as an example, the raw ore lead grade is 6.54%, zinc grade is 20.10%, and iron grade is 15.20%.

[0034] 1) Grinding the high-grade lead-zinc-sulfur raw ore in the production backwater medium with a ball mill, the grinding fineness -0.074mm accounts for 72%, and obtains the ore slurry;

[0035] Production backwater is the backwater produced by water quality recycling during production by this method, and its water hardness is ≤150mg / L, lead ion concentration ≤1mg / L, zinc ion concentration 0.1-0.3mg / L, COD 700-900mg / L, The dissolved oxygen content is 7.2-8.3mg / L.

[0036] 2) Introduce the ore pulp into the mixing tank, add zinc sulfate for aeration and stirring for 15 minutes, and wait until the pulp potential and dissolved oxygen value meet the requirements, that is, the pulp potential is 270mV (SHE), and the dissolved oxygen content is 8.3mg / L. After 3 minutes of extraction, a sulfur-lead mix...

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Abstract

The invention relates to an electrochemistry flotation method for recycling lead-sulfur bulk concentrate from high-grade lead-zinc ore, and belongs to the field of metal mineral processing. High-gradelead-zinc-sulfur raw ore difficult to separate is subjected to ore grinding in a production backwater medium through a ball mill, and ore pulp is obtained; and the ore pulp is introduced into a stirring barrel, zinc sulfate is added for air agitation stirring treatment, after the electric potential and dissolved oxygen value of the ore pulp meet the requirements, lead flotation in advance is conducted, the lead-sulfur bulk concentrate with high lead content is obtained, then sodium ethyl-xanthate and 2# flotation oil are added for mixed flotation, and the lead-sulfur bulk concentrate with lowlead content is obtained. The process is reasonable, the drug consumption is low, the recovery rate is high, pressure of subsequent separation operation of the bulk concentrate is reduced, adaptability to the high-grade lead-zinc-sulfur raw ore difficult to separate is high, and the effect is remarkable.

Description

technical field [0001] The invention belongs to the field of metal mineral processing, and in particular relates to an electrochemical flotation method for recovering lead-sulfur mixed concentrate from high-grade lead-zinc ore. Background technique [0002] The raw ore with high lead, high zinc and high sulfur will consume a large amount of oxides during the grinding process due to the oxidation reaction of the mill, steel balls, and sulfide ore, and the dissolved oxygen and slurry potential of the grinding products are both low. In the presence of collector xanthate, whether hydrophobic substances are generated or not depends entirely on the relative magnitude between the electrode potential of sulfide minerals and the potential of the hydrophobe formation reaction. In the sulfur-lead mixed flotation stage, due to the low potential of the ore pulp, less dissolved oxygen, poor foam mineralization, slow flotation speed, and large consumption of reagents, it is necessary to sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/02B03B1/00
CPCB03B1/00B03D1/02
Inventor 王胜开刘志成陆跃邦罗进刘瑞增朱家锐卢华生高连启汪波惠世和刘金德王明飞赵学中黎飞敖顺福张田强常伟华张林友陈冲
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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