CaCl2–O2 Roasting of Stibnite and a Complex Copper Concentrate at 500–650 ℃

Copper ore is the main mineral for the large deposits. Copper minerals are mostly consisting of chalcopyrite, secondly consisting of bornite, there are traces of processing copper blue and malachite, the mineral is disseminated by coarse granularity. This mineral is easy to processing. Production process was using by the process of grinding-flotation. After grinding fineness, lime dosage, sodium sulfide dosage, collector and frother dosage, were determined by the open test. Closed circuit experiment was conducted by those optimal conditions identified in the above test, the recovery of copper concentrate is 88.38% and the grade of copper concentrate is 14.37%.

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Efficiently Utilizing a Low Grade and Complex Copper Ore by Flotation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.734-737.929 ◽

2013 ◽

Vol 734-737 ◽

pp. 929-934

Author(s):

Qi Nie ◽

Xiao Si Zhou ◽

Fen Lan Peng ◽

Xu Shen ◽

Zhi Zhang Li

Keyword(s):

Yunnan Province ◽

Copper Recovery ◽

Test Scheme ◽

Low Grade ◽

High Quality ◽

Copper Ore ◽

Copper Concentrate ◽

Main Factors ◽

Complex Copper

Based on the analysis of the properties of the copper ore from Jinggu area in Yunnan province, a suitable technical route was presented for processing of eligible copper concentrate and the main factors i.e. grinding fineness, Na2S dosage and collector dosage, affecting the quality of roughing concentration was investigated. On this basis, a close-circuit flotation test scheme was preceded, which obtained a high quality copper concentrate with Cu grade of 16.08%, copper recovery of 58.52%. The recovery of copper concentrate is much lower than the Cu recovery of roughing concentrate from the condition experiments. This may be contributed to the fact that fine slime carried by middling worsens the separation of copper minerals and gangues. The Mo was enriched in concentrate, which is significantly considered to recovery in further work.

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CO2 mass transfer in bioleaching reactors: CO2 enrichment applied to a complex copper concentrate

Hydrometallurgy ◽

10.1016/j.hydromet.2018.08.006 ◽

2018 ◽

Vol 180 ◽

pp. 277-286 ◽

Cited By ~ 6

Author(s):

Anne-Gwénaëlle Guezennec ◽

Catherine Joulian ◽

Claire Delort ◽

Françoise Bodénan ◽

Sabrina Hedrich ◽

...

Keyword(s):

Mass Transfer ◽

Co2 Enrichment ◽

Copper Concentrate ◽

Co2 Mass Transfer ◽

Complex Copper

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Oxidative Sulfur Removal from Complex Copper Concentrate

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.mer2008081 ◽

2008 ◽

Vol 49 (8) ◽

pp. 1889-1892 ◽

Cited By ~ 5

Author(s):

Byung-Su Kim ◽

Hoo-In Lee ◽

Jin-Tae Park ◽

Jeong-Soo Sohn ◽

Jae-Chun Lee

Keyword(s):

Sulfur Removal ◽

Copper Concentrate ◽

Complex Copper

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Influence of CO2 Supplementation on the Bioleaching of a Copper Concentrate from Kupferschiefer Ore

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.262.242 ◽

2017 ◽

Vol 262 ◽

pp. 242-245 ◽

Cited By ~ 1

Author(s):

Anne Gwénaëlle Guézennec ◽

Catherine Joulian ◽

Jérôme Jacob ◽

Françoise Bodenan ◽

Patrick d'Hugues ◽

...

Keyword(s):

Mass Transfer ◽

Liquid Phase ◽

Transfer Rate ◽

Leaching Kinetics ◽

Copper Concentrate ◽

Batch Tests ◽

Autotrophic Bacteria ◽

Solid Load ◽

Cu Dissolution ◽

Complex Copper

In bioleaching processes using autotrophic bacteria, CO2 is the carbon source for the growth of the microorganisms and its availability is dependent on gas mass transfer. The objective of this study was to investigate the demand in CO2 in complex copper concentrate bioleaching operations and to optimize CO2 supply. Batch tests in 2L-stirred reactors at 10%w/v solid load were performed to study the need for CO2-supplementation and to determine the adequate CO2 partial pressure in the gas inlet. The results show that Fe oxidation (and thus microbial activity) is delayed when air is injected without CO2-supplementation. CO2-supplementation improves leaching kinetics since Cu dissolution rate increases from 84 mg/L/h with air solely to 120 mg/L/h when CO2 is added to air. The study proposes also a methodology to determine G/L transfer components and to asses CO2 limitations in the system. It shows that the microorganisms are not only sensitive to the transfer rate of CO2 from the gas to the liquid phase, but also to the availability of CO2 in solution.

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