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Lecture 5 Flotation 1 CHAPTER 7– FLOTATION OF SULPHIDE MINERALS Contents: Xanthate adsorption. Oxidation reactions. Activation & depression. Flotation of chalcopyrite, galena, sphalerite, pyrite. Selective flotation. Pb-Zn bulk flotation. Sulphide minerals are floated by sulphydryl collectors (thio-componds) Adsorption of Sulphydryl Collectors:
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01-01-2012· Chalcopyrite ores are usually processed by means of hydrometallurgical or pyrometallurgical processes, but due to environmental aspects and the possibility of increased exploitation of mixed and lower grade ores and relatively small isolated deposits, there has been a worldwide upsurge of interest in the hydrometallurgical processes of this ore as compared to
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Chalcopyrite is often associated with pyrite and economical extraction of copper demands selective depression of pyrite from chalcopyrite. Conventionally sodium cyanide is used as a depressant in alkaline conditions for the selective depression of pyrite from chalcopyrite during the froth flotation process, leading to potentially
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10-11-2017· In conventional chalcopyrite flotation, pyrite is depressed by maintaining a pulp pH of 9 or higher; this results in selective adsorption of hydroxide ions (OH −) on pyrite crystal surfaces thereby preventing the sorption of collector molecules (Davenport et al., 2002).
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17-04-2010· The interaction mechanism of collector DLZ in the flotation process of chalcopyrite and pyrite was investigated through flotation experiments, zeta potential measurements and infrared spectrum analysis. Flotation test results indicate that DLZ is the selective collector of chalcopyrite. Especially, the recovery of chalcopyrite is higher than 90% in neutral and weak alkaline systems, while
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3.1 Effects of NaOH and lime on flotation behavior of chalcopyrite and pyrite During mineral flotation, H 2 SO 4 is generally used as an acidic pH regulator, and NaOH or lime as an alkaline pH regulator. The current study examines the effects of NaOH and lime on the flotation behavior of chalcopyrite and pyrite. In the flotation test, SBX with
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Flotation tests were conducted at natural pH (7.0-7.5) and at alkaline pH 8.5 (Na2CO3) keeping other conditions identical. The results indicate that flotation at natural pH floated out chalcopyrite, pyrite and Pb bearing minerals in the rougher float. Regrinding of rougher float and cleaning at alkaline pH
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Chalcopyrite and pyrite heterocoagulate in the acidic medium, i.e. at pHb5.5, but do not coagulate in the alkaline medium in either the absence or the presence of DTP and TC flotation collectors. ! Selective flotation of chalcopyrite from pyrite is possible at pH=10 and is impossible at pH=4. !
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The chalcopyrite and pyrite losses in the tailing from the rougher circuit were the same for both bulk and sequential roughing (less than 6%). In cleaning (bulk circuit), the effective pH for pyrite depression was about 11.8. The copper recovery was 70% (grade of 20% copper) and the sulfur recovery (pyrite product) was 80% (grade of 36% sulfur).
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The process was performed at room temperature 17 °C for each of the samples. [12; 24-25] The flotation process in Denver cell counted with the rougher and scavenger stages where the greatest possible recovery of Chalcopyrite ore was sought in the samples having as key parameters the main characteristics of the particles [4].
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01-10-2020· The serial flow flotation process is significantly superior to the separate separation of the two ores. Therefore, the serial flow flotation process is adopted in the design of the concentrator. Yunfu Pyrite Mine is a large-scale open-pit mining and beneficiation joint enterprise with a designed annual output of 3 million tons of raw ore, of which 1.5 million tons of lean ore are selected.
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03-05-2017· Sodium silicate was somewhat effective in causing a differential or selective flotation of copper, as chalcopyrite from pyrite by keeping pyrite from floating. Sodium hydroxide and sodium sulfide gave, in most cases, a distinct separation of sphalerite from chalcopyrite; i.e., a high copper and low zinc by suppressing the flotation of sphalerite.
Get PriceHeterocoagulation between various fine mineral particles contained within a mineral suspension with different structural and surface chemistry can interfere with the ability of the flotation processes to selectively separate the minerals involved. This paper examines the interactions between chalcopyrite (a copper mineral) and pyrite (an iron
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The process was performed at room temperature 17 °C for each of the samples. [12; 24-25] The flotation process in Denver cell counted with the rougher and scavenger stages where the greatest possible recovery of Chalcopyrite ore was sought in the samples having as key parameters the main characteristics of the particles [4].
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hydrogen peroxide by pyrite and its influence on flotation – submitted to Journal of Minerals Engineering. 2. Alireza Javadi Nooshabadi, Kota Hanumantha Rao. Formation hydrogen peroxide by chalcopyrite and its influence on flotation – submitted to Journal of Minerals and Metallurgical processing. 3. Alireza Javadi Nooshabadi, Kota
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Heterocoagulation between various fine mineral particles contained within a mineral suspension with different structural and surface chemistry can interfere with the ability of the flotation processes to selectively separate the minerals involved. This paper examines the interactions between chalcopyrite (a copper mineral) and pyrite (an iron
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(2010). Effect of H2O2 and NaSH Addition to Change the Electrochemical Potential in Flotation of Chalcopyrite and Pyrite Minerals. Mineral Processing and Extractive Metallurgy Review: Vol. 32, No. 1,
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hydrogen peroxide by pyrite and its influence on flotation – submitted to Journal of Minerals Engineering. 2. Alireza Javadi Nooshabadi, Kota Hanumantha Rao. Formation hydrogen peroxide by chalcopyrite and its influence on flotation – submitted to Journal of Minerals and Metallurgical processing. 3. Alireza Javadi Nooshabadi, Kota
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01-01-2012· 2.2. Chalcopyrite Ore Processing The first step in the chalcopyrite processing is to liberate the copper minerals and remove waste constituents such as alumina, limestone, pyrite and silica so that the copper and non-ferrous mineral values are concentrated into
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Floe-Flotation of Chalcopyrite from a Low Grade Cu —Zn Ore fines (Song, S. et al, 2000, Song, S. et al, 2001). In the present study attempt has been made to explore the possibility of exploiting floc-flotation to the flotation of chalcopyrite fines from a low grade ore using simple, conventional collectors and kerosene (Shende et al. 2005).
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