Flotation separation inhibitor and separation method of galena, pyrite and sphalerite

A separation method, pyrite technology, applied in flotation, solid separation, etc., can solve the problems of poor concentrate quality, entrained impurities, blockage of pipelines, etc., and achieve high-efficiency separation

Inactive Publication Date: 2014-07-09
HUNAN RES INST FOR NONFERROUS METALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the extensive use of lime can easily lead to a series of problems: the flotation foam is sticky, the entrainment of impurities is large, and the quality of the concentrate is poor; Recycling of precious metals such as gold and silver; sulfur selection is difficult, and after pyrite is suppressed by lime, it usually needs to be activated by adding a large amount of acid before recycling; lime is e

Method used

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  • Flotation separation inhibitor and separation method of galena, pyrite and sphalerite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A high-sulfur complex refractory lead-zinc mine in Guangdong. The main metal minerals in the ore are pyrite, sphalerite and galena. The main gangue minerals are quartz, calcite, feldspar and so on. The results of the multi-element analysis of the raw ore are shown in Table 1.

[0016] Table 1 The results of multi-element chemical analysis of samples / %

[0017] element Zn Pb Cu TF SiO 2 Al 2 o 3 CaO content 8.50 4.30 0.07 25.3 12.81 0.74 5.20 content MgO Na 2 o K 2 o As S Au (g / t) Ag (g / t) content 0.55 0.96 0.78 0.19 28.10 <0.1

89.16

[0018] process such as figure 1 As shown, the specific process parameters are as follows:

[0019] (1) Grinding: 85% of the raw ore is ground to a particle size of less than 200 mesh;

[0020] (2) Lead flotation: After grinding, the ore slurry is subjected to lead flotation. The flotation process is a lead roughing, three lead refining and a lead sweep...

Embodiment 2

[0024] A high-sulfur lead-zinc mine in Hunan, the main metal minerals in the ore are pyrite, galena and sphalerite. The main gangue minerals are dolomite, calcite, quartz and so on. The results of the multi-element analysis of the raw ore are shown in Table 2.

[0025] Table 2 The results of multi-element chemical analysis of samples / %

[0026] element TF Cu Pb Zn S As mn content 11.44 0.054 3.55 4.15 16.50 0.28 0.36 content CaO MgO SiO 2 al 2 o 3 CaF 2 Au (g / t) Ag (g / t) content 29.25 1.75 20.23 3.21 0.47 1.10 150.50

[0027] process such as figure 1 As shown, the specific process parameters are as follows:

[0028] (1) Grinding: 70% of the raw ore is ground to a particle size of less than 200 mesh;

[0029] (2) Lead flotation: After grinding, the ore slurry is subjected to lead flotation. The flotation process is a lead roughing, three lead refining and a lead sweeping to obtain lead concentrate. ...

example 3

[0032] A lead-zinc mine in Vietnam, the main metal minerals in the ore are pyrite, sphalerite and galena. The main gangue minerals are quartz, calcite, dolomite and so on. The results of the multi-element analysis of the raw ore are shown in Table 3.

[0033] Table 3 The results of multi-element chemical analysis of samples / %

[0034] element Pb Zn Cu SiO2 Al2O3 CaO MgO content 1.85 0.73 0.02 35.93 10.80 12.02 6.74 content S Fe CaF 2 K 2 o Na 2 o Au (g / t) Ag (g / t) content 7.13 6.78 0.14 2.54 1.38 <0.1

80

[0035] process such as figure 1 As shown, the specific process parameters are as follows:

[0036] (1) Grinding: Raw ore is ground to a particle size of less than 200 mesh, accounting for 76%;

[0037] (2 Lead flotation: lead flotation is performed on the pulp after grinding. The flotation process is one lead roughing, two lead selections and two lead sweeps to obtain lead concentrate. In the lead...

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Abstract

The invention discloses a flotation separation inhibitor and separation method of galena, pyrite and sphalerite, and belongs to the technical field of mineral processing. The method includes adopting raw ores of sulfide lead-zinc mine as raw material, and adding SDSN (dimethyl dithiocarbamate : 2-(methylthio)ethylamine = 1-3:1)to serve as inhibitor of the pyrite and the sphalerite so as to perform lead and zinc sulphur flotation separation after the raw ores are grinded. Compared with an existing lead and zinc sulphur separation technology, the composite inhibitor SDSN has the advantages that selectivities of the pyrite and the sphalerite are high, inhibiting capability is high, usage is fewer, and adding is facilitated. The the pyrite and the sphalerite can be inhibited well, efficient separation of the galena and the zinc sulphur is implemented, the problems that according to the traditional lime or cyanide method, the recovery rate of associated gold, silver and other precious metals in the lead-zinc sulfide mine is low and ecological environment is seriously damaged are overcome, and an efficient and environment-friendly flotation separation method is provided for complex sulfide lead-zinc mine separation.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a flotation separation method for lead-zinc sulfide ore. Background technique [0002] The inhibitors of pyrite in the lead-zinc-sulfur separation flotation process at home and abroad mainly include the following categories: lime, cyanide, redox agents, organic inhibitors, microbial inhibitors, etc. Lime is the most widely used inhibitor in the separation flotation of lead, zinc and sulfur. Lime exists in the form of OH- ions and Ca2+ ions in the slurry system. Pyrite is inhibited by forming a hydrophilic film on the mineral surface, competing with xanthate anions, and desorbing xanthate anions adsorbed on the mineral surface. However, the extensive use of lime can easily lead to a series of problems: the flotation foam is sticky, the entrainment of impurities is large, and the quality of the concentrate is poor; Recycling of precious metals such as gold and silver;...

Claims

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Application Information

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IPC IPC(8): B03D1/012B03D1/00B03D101/06
Inventor 胡波陈代雄杨建文朱雅卓薛伟李晓东董艳红祁忠旭曾惠明
Owner HUNAN RES INST FOR NONFERROUS METALS
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