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Method of recycling lead and zinc ore from high-sulfur lead and zinc ore tailings

A technology of lead-zinc ore and tailings, which is applied in the field of mineral processing engineering, can solve problems such as difficult high-efficiency separation of lead and zinc, poor recovery effect of zinc oxide, and low added value of products, so as to improve zinc recovery rate, facilitate industrial implementation, and improve The effect of comprehensive utilization efficiency

Inactive Publication Date: 2019-01-04
KUNMING UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although the recovery rate of lead and zinc in this invention is relatively high, due to the use of combined processes such as screening, gravity separation, and flotation, the process flow is complicated, and the concentrate finally obtained is a mixed concentrate of lead and zinc, so it is difficult to achieve efficient separation of lead and zinc , low value-added products
Feng Zhongwei and others carried out a comprehensive recovery test of lead, zinc and sulfur in a lead-zinc tailings in Guizhou (Feng Zhongwei, Ning Fatian, Lan Guimi, et al. Comprehensive recovery of lead, zinc and sulfur in a lead-zinc tailings in Guizhou[J] . Metal Mine, 2009,(394): 157-160), using the process of preferential mixed flotation of sulfide ore - separation of zinc and sulfur in mixed flotation concentrate - sulfide flotation of lead oxide ore to recover minerals such as lead, zinc and sulfur in tailings, and obtained A better separation index was obtained, and the grade and recovery rate of lead in the final lead oxide concentrate reached 48.56% and 85.38% respectively. Zinc recovery is poor

Method used

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  • Method of recycling lead and zinc ore from high-sulfur lead and zinc ore tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: the method for reclaiming lead-zinc minerals from high-sulfur lead-zinc ore tailings, the selected tailings sample is taken from the old tailings pool of Huize high-sulfur lead-zinc mine in Yunnan, and the tailings contain Pb 0.84%, Zn 3.67%, S 1.89%, Fe 2.94%, of which the lead minerals are mainly galena and white lead minerals, and the zinc minerals are mainly sphalerite, smithsonite and zinc silicate.

[0035] (1) Add the tailings to the rod mill, add water to adjust the pulp concentration to 62%, and then grind the ore until the particle size is less than 0.074mm by mass, accounting for 83.2%;

[0036] (2) Adjust the slurry concentration of the grinding product obtained in step (1) to 24%, and then add dispersant sodium hexametaphosphate 1000g / t, collector butyl xanthate 100g / t, foaming agent 2 # Oil 30g / t is used for lead roughing to obtain lead roughing concentrate and lead roughing tailings;

[0037] (3) Perform lead concentration on the lead rough...

Embodiment 2

[0047] Embodiment 2: This method for reclaiming lead-zinc minerals from high-sulfur lead-zinc ore tailings, the tailings sample used is taken from the tailings pond of Yiliang lead-zinc mine in Zhaotong, Yunnan, and the tailings contain Pb 1.02%, Zn 2.83%, S 3.14%, Fe 5.28%, Ag 4.2g / t, Ge 3.05g / t, of which the lead-containing minerals are mainly galena with fine particle size, and the zinc-containing minerals are mainly smithsonite.

[0048] (1) Put the tailings into the rod mill, add water to adjust the slurry concentration to 65%, and then grind the ore until the particle size is less than 0.074mm by mass, accounting for 82%;

[0049] (2) Adjust the slurry concentration of the grinding product obtained in step (1) to 23%, and then add dispersant sodium hexametaphosphate 1200g / t, collector butyl xanthate 80g / t, foaming agent 2 # Oil 20g / t is used for lead roughing to obtain lead roughing concentrate and lead roughing tailings;

[0050] (3) Perform lead concentration on the l...

Embodiment 3

[0060] Embodiment 3: This method for recovering lead-zinc minerals from high-sulfur lead-zinc mine tailings, the tailings sample used is taken from the tailings pond of Guangdong Fankou lead-zinc mine, and the tailings contain Pb 0.97%, Zn 1.94%, S 2.27%, Fe 3.22%, SiO 2 32.84%, of which the lead minerals are mainly galena, the zinc minerals are mainly smithsonite, sphalerite and willemite, and the main gangue minerals are quartz and dolomite.

[0061] (1) Put the tailings into the rod mill, add water to adjust the slurry concentration to 60%, and then grind the ore until the particle size is less than 0.074mm by mass, accounting for 85%;

[0062] (2) Adjust the slurry concentration of the grinding product obtained in step (1) to 25%, and then add dispersant sodium hexametaphosphate 1100g / t, collector butyl xanthate 120g / t, foaming agent 2 # Oil 40g / t is used for lead roughing to obtain lead roughing concentrate and lead roughing tailings;

[0063] (3) Perform lead concentr...

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Abstract

The invention discloses a method of recycling lead and zinc ore from high-sulfur lead and zinc ore tailings and belongs to the technical field of mineral processing engineering. The method comprises the steps that after fine grinding of the high-sulfur lead and zinc ore tailings is completed, a regulator agent, a collecting agent and a foaming agent are added,lead and zinclead rough flotation, lead scavenging flotation, and lead fine flotation are sequentially conducted, and recycling of minute granulometric class lead oreis intensified, so that lead concentrate is obtained; and then, desliming is conducted on the tailings obtained after lead flotation, after a sulfuration agent, the collecting agent and the foaming agent are added to setting sand obtained after desliming, rough flotation,fine flotation and scavenging flotation are conducted on zinc oxide ore sequentially,two types of zinc concentrate products, namely high-grade zinc concentrate and low-grade zinc concentrate, can beobtained, wherein the different collecting agents are adopted for the rough flotation and the scavenging flotation of the zinc oxide mineral. By means of the method of recycling the lead and zinc orefrom the high-sulfur lead and zinc ore tailings, the problems that the mineral sludge disturbance is severe in the recleaning process of the high-sulfur lead and zinc ore tailings, the zinc ore recycle rate is low, the recleaning technological process is complicated, and the medicament cost is high can be solved; the recycle rate of lead, zinc and the like can be increased conveniently; the methodof recycling the lead and zinc ore from the high-sulfur lead and zinc ore tailings is reasonable in process, simple in procedureand good in sorting effect, and industrialized implementation can be conducted easily.

Description

technical field [0001] The invention relates to a method for recovering lead-zinc minerals from tailings of high-sulfur lead-zinc mines, belonging to the technical field of mineral processing engineering. Background technique [0002] As a common type of lead-zinc deposit, high-sulfur lead-zinc deposits are widely distributed in my country, such as Yunnan Huize lead-zinc mine, Yiliang lead-zinc mine, Lancang lead-zinc mine, Guangdong Fankou lead-zinc mine, Nanjing Qixia lead-zinc mine, etc. Shanshan lead-zinc mine and Hunan Shuikoushan lead-zinc mine are very typical high-sulfur lead-zinc mines. The content of iron sulfide minerals in such ores is usually high, up to 30% or more, and some even as high as 50% or more; In addition, the lead-zinc grade and lead-zinc oxidation rate in this kind of ore are relatively high, and the Pb+Zn grade in the ore can usually reach more than 15%, such as the grade of Pb+Zn in Yunnan Huize lead-zinc mine and Yiliang lead-zinc mine reached more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/00B03B1/00
CPCB03B1/00B03B7/00B03B9/00
Inventor 杨波王晓骆霄
Owner KUNMING UNIV
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