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Selective oxidation and flotation separation method of pyrite gangue in sulfide ore

A separation method and technology for sulfide ore, applied in the fields of iron sulfide, chemical instruments and methods, flotation, etc., can solve the problems of time-consuming cultivation, highly toxic inorganic inhibitors, etc., achieve a mild and environmentally friendly reaction process, and achieve selective separation. , Improve the effect of flotation recovery rate and grade

Active Publication Date: 2022-02-01
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 of pyrite gangue in sulfide ore
  • Selective oxidation and flotation separation method of pyrite gangue in sulfide ore
  • Selective oxidation and flotation separation method of pyrite gangue in sulfide ore

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 mineral flotation, and in particular relates to a selective oxidation method for pyrite gangue in sulfide ore, which comprises treating the slurry containing sulfide ore and an oxidizing agent under the catalyst of formula 1 and light irradiation, The photocatalytic selective oxidation of the pyrite gangue is carried out. The invention also includes a method for pretreatment of sulfide ore based on the selective oxidation method, followed by flotation separation. The technical solution of the present invention, based on the photocatalysis mediated by the formula 1, can specifically oxidize iron sulfide gangue minerals in sulfide ores, thus facilitating the 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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Patent Type & Authority Patents(China)
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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