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Flotation method for lead and zinc sulfide ores

A lead-zinc sulfide, flotation technology, applied in flotation, solid separation and other directions, can solve the problems of expensive chemicals, low flotation rate and high cost, and achieve the effect of reducing the types of use, reducing costs and simple process

Inactive Publication Date: 2012-05-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there are many methods for the flotation of lead-zinc sulfide ore, but the conventional flotation method is to use reagents for flotation. In this flotation method, various reagents are relatively expensive and the cost is relatively high.
Moreover, the discarded tailings will also have varying degrees of impact on the environment, and it is not easy to control the dosage of chemicals when adding chemicals, which leads to the reduction of the taste and recovery rate of lead and zinc concentrates in chemical flotation.
When the traditional electrolysis method is used to float lead-zinc sulfide ore, the lead-zinc sulfide ore is directly used for electrolysis, which leads to low flotation rate and cannot obtain good-grade lead-zinc concentrate

Method used

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  • Flotation method for lead and zinc sulfide ores
  • Flotation method for lead and zinc sulfide ores
  • Flotation method for lead and zinc sulfide ores

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: the flotation method of this lead-zinc sulfide ore, concrete operation is as follows:

[0025] Using the raw ore of a lead-zinc sulfide mine in Yunnan containing 5.82% Pb and 6.5% Zn, the lead-zinc sulfide ore is crushed using a three-stage and one-closed-circuit crushing process. The crushing particle size is -15mm, and then two-stage closed-circuit grinding is performed. The particle size is -200 mesh, accounting for 80%, the concentration of lead-zinc ore flotation mass percentage after grinding is 21%, and a mixed inhibitor of 100g / t of collector ethoxide nitrogen, 400g / t of zinc sulfate and 400g / t of sodium sulfite is added , foaming agent 730A 60g / t, lime 1000g / t, adjust the pH to 11, and carry out lead flotation. After one roughing, one sweeping and three times of beneficiation, lead concentrate is obtained. The grade of lead concentrate is 55.6%. The rate is 84.87%; the tailings after lead roughing are added with 200g / t of activator ammonium sulfit...

Embodiment 2

[0026] Embodiment 2: the flotation method of this lead-zinc sulfide ore, concrete operation is as follows:

[0027] Using the raw ore of a lead-zinc mine in Yunnan containing 5.82% Pb and 6.5% Zn, the lead-zinc sulfide ore is crushed by a three-stage and one-closed-circuit crushing process. The crushing particle size is -10mm, and then two-stage closed-circuit grinding is performed. The grinding particle size -200 mesh accounts for 90%, the flotation mass percentage concentration of lead-zinc sulfide ore after grinding is 25%, adding collector 20g / t ethyl disulfide nitrogen, zinc sulfate 100g / t and sodium sulfite 100g / t mixed inhibitor, starting Foaming agent 730A 20g / t, lime 200g / t, adjust PH to 11.5, carry out lead flotation, get lead concentrate after one roughing, one sweeping and three times beneficiation, the lead concentrate grade is 56.01%, the recovery rate is 84.56%; Add 150g / t of activator ammonium sulfite, 200g / t of butyl xanthate, 45g / t of foaming agent 730A to th...

Embodiment 3

[0028] Embodiment 3: the flotation method of this lead-zinc sulfide ore, concrete operation is as follows:

[0029] Using the raw ore of a lead-zinc mine in Yunnan containing 5.82% Pb and 6.5% Zn, the lead-zinc sulfide ore is crushed with a three-stage and one-closed circuit crushing process. The crushing particle size is -20mm, and then two-stage closed-circuit grinding is carried out. The grinding particle size -200 mesh accounts for 85%, the flotation mass percentage concentration of lead-zinc sulfide ore after grinding is 28%, adding collector 80g / t of ethyl disulfide nitrogen, 200g / t of zinc sulfate and 300g / t of sodium sulfite mixed inhibitors, starting Foaming agent 730A 70g / t, lime 600g / t, adjust PH to 12, carry out lead flotation, after one roughing, one sweeping and three times of beneficiation, lead concentrate is obtained, the grade of lead concentrate is 55.6%, and the recovery rate is 84.87%; Add 100g / t of activator ammonium sulfite, 300g / t of butyl xanthate, 50g...

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Abstract

The invention discloses a flotation method for lead and zinc sulfide ores. The method comprises the following steps of: crushing the lead and zinc sulfide ores through a crushing process in three sections of closed route; grinding the ores through two sections of closed route, wherein powder with the ore grinding granularity of -200 meshes is up to 80 to 90 percent; after grinding the ores, adding a catching agent, an inhibitor, a foaming agent and a pH regulator to perform differential flotation on lead, wherein lead concentrate is obtained by performing rough concentration for one time, scavenging for one time and fine concentration for three times on the ores; and putting the tailings obtained after lead scavenging into an electrolyte tank to perform flotation on zinc through an electrolytic method to obtain zinc concentrate. Because the electrolytic method is adopted to separate minerals in the method, the using amount of medicinal agents is reduced, the cost is reduced, the pollution to environment is reduced, and the extraction rate is increased.

Description

Technical field [0001] The invention involves a flotation method of a lead -zinc ore, which is a non -ferrous metal mineral field. technical background [0002] my country's lead -zinc ore resources are rich in resources, mainly divided into two types: one is a vulcanized mines mainly based on flash zinc ore, square lead ore, and pyrite. Lord's oxidation ore.So far, there are many ways to flotate the leading zinc ore, but the conventional floating method uses potions to flot. In this floating method, various potions are more expensive and the cost is relatively high.In addition, the abandoned tailings will also affect the environment to varying degrees, and it is not easy to control the dosage of the medicament when adding a pharmaceutical agent, which causes the floating of the pharmaceutical to reduce the taste and recovery rate of lead and zinc concentrate.When traditional electrolytic method is flotal, the sulfide zinc ore is used directly, and the sulfide zinc ore is directl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03B1/00
Inventor 周海攀曾春平
Owner KUNMING UNIV OF SCI & TECH
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