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Composite inhibitor for pyrite and easy-to-float gangue in copper-sulfur ore and flotation separation method thereof

A technology of composite inhibitor and separation method, applied in flotation, solid separation, grain treatment, etc., can solve the problems of difficulty in separation of copper and sulfur, affecting the quality of copper concentrate, etc., to reduce adverse effects, strengthen inhibition, and reduce circulation. load effect

Pending Publication Date: 2020-07-31
于晨 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a beneficiation method for complex copper-sulfur ore containing gangue, to overcome the close relationship between copper and sulfur intercalation, and gangue affecting the quality of copper concentrate, resulting in copper in copper-sulfur ore. Sulfur separation is difficult, and the discharge of copper beneficiation tailings water is too high due to the high pH value. This method has the characteristics of good separation effect, simple operation and use, strong adaptability, good and stable technical indicators, and environmentally friendly chemicals.

Method used

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  • Composite inhibitor for pyrite and easy-to-float gangue in copper-sulfur ore and flotation separation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] The raw ore grade is Cu 0.65%, S 5.19%. The mineral composition of the ore is relatively complex, and the metal minerals include chalcocite, chalcopyrite, pyrite, pyrrhotite, limonite and so on. The gangue minerals are mainly quartz, subkaolinite, mica, potash feldspar, chlorite and so on. The intercalation of copper minerals is relatively complex, mostly associated with pyrite and hydrokaolinite, the intercalation particle size is finer, and the dissociation degree of monomer is poor.

[0038] The specific steps of the technological process are:

[0039] 1) Crush and grind the raw ore, so that the useful minerals and gangue minerals in the copper-sulfur ore are fully dissociated, and the ore is ground until the particle size of the copper-sulfur ore is -0.074mm, accounting for 65%; when grinding, add Yu-001 400g / t is used as a pulp pH regulator and inhibitor, adding water to adjust the pulp until the mass concentration of the pulp is 33%, and the pH value of the pul...

Embodiment 1

[0047] The beneficiation indexes of embodiment one and comparative example one are shown in table 1.

[0048] Table 1 Mineral dressing index of embodiment 1 and comparative example 1

[0049] serial number product name Copper concentrate grade, % Copper recovery rate, % pH value of tailings slurry (tailings I and tailings II combined) Embodiment one copper concentrate 32.2 91.0 8.6 Comparative example one copper concentrate 26.5 88.2 10.5

Embodiment 2

[0051] The raw ore grade is Cu 0.88%, S 12.6%. The mineral composition of the ore is relatively complex, and the metal minerals include chalcopyrite, chalcocite, bornite, pyrrhotite, pyrite, marcasite and so on. The gangue minerals are mainly quartz and garnet, followed by talc and serpentine. The intercalation of copper minerals is relatively complex, mostly conjoined with pyrite, pyrrhotite, and quartz. The intercalation particle size is finer and the dissociation degree of monomer is poor.

[0052] The specific steps of the technological process are:

[0053] 1) Crush and grind the raw ore until the copper-sulfur ore particle size -0.074mm accounts for 70%; add Yu-001 500g / t as the slurry pH regulator and inhibitor during the grinding, add water to adjust the slurry until the mass concentration of the slurry is 33%, the pH value of the pulp is 8.0;

[0054] 2) Add 25 g / t of collector butyl sodium black powder to the ore pulp after grinding in step 1, stir for 3 min, add ...

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Abstract

The invention discloses a composite inhibitor for pyrite and easy-to-float gangue in copper-sulfur ore and a flotation separation method thereof. The method comprises the steps of crushing, grinding and size mixing of raw copper-sulfur ore, rough scavenging of the copper-sulfur ore, regrinding of roughed concentrate and concentration. The composite inhibitor Yu-001 is used for selectively enhancing the inhibition of pyrite and easy-to-float gangue and eliminating the activation of inevitable ions in ore pulp on the pyrite; the copper sulphide ore is selectively collected through a collecting agent that is isobutyl sodium black powder; meanwhile, quicklime or NaOH is not needed to adjust the pH value of ore pulp to be strong alkaline before flotation; copper ions, iron ions, ferrous ions and the like can be effectively chelated by adding the composite inhibitor, the activation effect of the ions on pyrite is eliminated, and therefore efficient separation of the copper sulphide ore, thepyrite and gangue minerals is efficiently achieved. The composite inhibitor and method have the characteristics of being good in separation effect, stable in beneficiation index, low in agent consumption, cleaner and more environment-friendly when compared with a traditional inhibitor, simple and convenient to operate and easy to operate and manage on site, and the method is a novel method suitable for beneficiation of complex refractory copper-sulfur ores, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of mineral metallurgical processing, in particular to a beneficiation method for complex refractory copper-sulfur ores containing pumiceous gangue. Background technique [0002] As an important strategic resource in the process of industrialization, copper-sulfur ore resources occupy an important position in my country's mineral resources. my country's copper ore resources are mainly copper sulfide ore, among which copper-sulfur symbiosis is the most common type of copper sulfide ore, and there is a kind of copper-sulfur ore containing pumice gangue in this kind of ore, copper sulfide minerals, Sulfur minerals are unevenly embedded in particle size and have poor monomer dissociation degree. They are seriously wrapped with each other; the buoyant gangue is mainly talc, serpentine and kaolinite, etc., which have good buoyancy and are easy to float up with copper minerals, which seriously affects the quality of ...

Claims

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Application Information

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IPC IPC(8): B03D1/018B04C9/00B02C21/00B03D101/06B03D101/02B03D101/04B03D103/02
CPCB02C21/00B03D1/018B03D2201/007B03D2201/02B03D2201/04B03D2201/06B03D2203/02B04C9/00
Inventor 于晨陈元春其他发明人请求不公开姓名
Owner 于晨
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