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Selective oxidation and flotation separation method for pyrite gangues in sulfide ores

A separation method and technology of sulfide ore, applied in iron sulfide, chemical instruments and methods, flotation, etc., can solve the problems of time-consuming cultivation, highly toxic inorganic inhibitors, etc., achieve environmental protection in the reaction process, improve flotation recovery rate and Quality, the effect of less dosage

Active Publication Date: 2021-04-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method has a certain inhibitory effect, but there are still some deficiencies, such as the time-consuming colony cultivation of microbial oxidation, and the highly toxic inorganic inhibitors such as cyanide, etc.

Method used

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  • Selective oxidation and flotation separation method for pyrite gangues in sulfide ores
  • Selective oxidation and flotation separation method for pyrite gangues in sulfide ores
  • Selective oxidation and flotation separation method for pyrite gangues in sulfide ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1: (pyrite or galena single mineral photocatalyst screening-flotation case)

[0069] To analyze the photocatalytic performance of pyrite or galena single mineral, the specific photocatalytic reaction process is as follows:

[0070] Add 3g of pyrite / galena pure mineral (0.035-0.074mm), 10mL of water, and 1.5mol% of the specified photocatalyst (Table 1) into a 25mL flask filled with an oxygen atmosphere. The photocatalytic reaction was carried out in the medium until 3h; the solid-liquid mixture after the reaction was filtered-washed-suction filtered, and after repeated washing and suction filtration, the photocatalyst adhered to the surface of the mineral sample was washed to obtain the treated mineral sample. pH is 7.

[0071] Flotation process:

[0072] Rinse the mineral sample after the photocatalytic reaction treatment into a 40mL flotation tank with water, add an appropriate amount of water, stir and inflate for 3 minutes to make it pulp, add sodium eth...

Embodiment 2

[0077] Embodiment 2: (pyrite or galena single mineral photocatalytic reaction gas atmosphere screening-flotation case)

[0078] Analyze the photocatalytic atmosphere of pyrite or galena single mineral, the specific photocatalytic reaction process:

[0079] Add 3g of pyrite / galena pure mineral (0.035-0.074mm), 10mL of water, and 1.5mol% photocatalyst (EosinY, formula 1-B) into a designated gas atmosphere (oxygen, air, nitrogen or carbon dioxide) filled In a 25mL flask, under magnetic stirring, the photocatalytic reaction was carried out in a white light LED light source device until 3h; the solid-liquid mixture after the reaction was filtered-washed-suctioned, and the light adhered to the surface of the mineral sample was removed after repeated washing and suctioned The catalyst was washed to obtain processed mineral samples, and the pH of the process was all 7.

[0080] Flotation process:

[0081]Rinse the mineral sample after the photocatalytic reaction treatment into a 40m...

Embodiment 3

[0083] Embodiment 3: (Pyrite or galena single mineral photocatalytic reaction light source screening - flotation case)

[0084] Analyze the photocatalytic light source of pyrite or galena single mineral, the specific photocatalytic reaction process:

[0085] Add 3g of pyrite / galena pure mineral (0.035-0.074mm), 10mL of water, and 1.5mol% Eosin Y into a 25mL flask filled with an oxygen atmosphere, and carry out photocatalytic reaction in a designated light source device under magnetic stirring until 3h; the reacted solid-liquid mixture is filtered-washed-suction filtered, and after repeated washing and suction filtration, the photocatalyst attached to the surface of the mineral sample is washed to obtain a treated mineral sample, and the pH of the process is 7.

[0086] Flotation process:

[0087] Rinse the mineral sample after the photocatalytic reaction treatment into a 40mL flotation tank with water, add an appropriate amount of water, stir and inflate for 3 minutes to make...

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Abstract

The invention belongs to the technical field of ore flotation, in particular to a selective oxidation method for pyrite gangues in sulfide ores. The method comprises treating slurry containing the sulfide ores and an oxidant by a catalyst of a structural formula 1 under radiation of light and performing photo-catalytic selective oxidation on the pyrite gangues in sulfide ores. The method further comprises a means of pre-treating the sulfide ores based on the selective oxidation method and then performing flotation separation. According to the technical scheme, photo-catalysis mediated by the formula 1 can oxidize iron sulfide gangue minerals in the sulfide ores specifically, such that it is favorable for flotation separation of iron sulfide gangues and useful sulfide ores.

Description

technical field [0001] The invention belongs to the technical field of mineral separation, and in particular relates to a high-efficiency separation method for useful sulfide ores and iron sulfide gangue therein. Background technique [0002] Pyrite (FeS 2 ) is the most widely distributed sulfide mineral in the earth's crust, and also chalcopyrite (CuFeS 2 ), galena (PbS), sphalerite (ZnS) and other common gangue minerals of sulfide minerals, the separation of the above minerals is mainly achieved by flotation. The flotation properties of pyrite and chalcopyrite and other target minerals are similar, and they often float out with the target mineral concentrate products, which will not only affect the recovery rate and grade of the concentrate products, but also cause troubles in the subsequent smelting process. Pyrite is the main raw material for the production of sulfuric acid. Other sulfide ore concentrate products doped with pyrite will produce sulfide waste gas and was...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03D1/018B01J19/12B01J10/00C01G49/12B03D101/04B03D101/02B03D103/02
CPCB03B7/00B03D1/018B01J19/12B01J10/00C01G49/12B03D2201/04B03D2201/02B03D2203/02
Inventor 高志勇张晚佳曹建蒋旭刘梦佳孙伟胡岳华冯知韬
Owner CENT SOUTH UNIV
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