Beneficiation of a Low-Grade Refractory Copper Ore in Yunnan

2014 ◽  
Vol 968 ◽  
pp. 173-179
Author(s):  
Feng Xie ◽  
Han Ping Zhang ◽  
Xian Mei Chen ◽  
Jin Fang Lv
Keyword(s):  
Experimental Study ◽  
Separation Process ◽  
Low Grade ◽  
Copper Ore ◽  
Copper Concentrate

Regarding to a Low-grade refractor copper ore，this paper investigates the property of run-of-mine ore，and based on the characteristic of raw ore，mineral process experimental study is implemented. It can realize the copper concentrate grading at 15.84%with a 87.04% recovery through the bulk flotation with Cu-S separation process.

Experimental Study on Flotation of Copper Sulfides in Yunnan Province

2014 ◽  
Vol 1010-1012 ◽  
pp. 1630-1635
Author(s):  
Jian Gang Ku ◽  
Hui Huang Chen ◽  
Wen Yuan Liu
Keyword(s):  
Experimental Study ◽  
Yunnan Province ◽  
Industrial Applications ◽  
Low Grade ◽  
Copper Ore ◽  
Copper Sulfides ◽  
Fine Grained ◽  
Concentrate Grade ◽  
Combination Mode ◽  
Grade Index

The copper ore, which has fine-grained nature and differences in the degree of mineral dissemination, is a kind of low grade sulfide minerals. Tests indicate that not only the grinding fineness but also the combination mode of depressants is one of the most important factors to improve the concentrate grade index. Additionally, according to tests conducted with dosage of lime, the rougher flotation should be operated at a pH of 11. Furthermore, all the depressants used were effective to increase the concentrate grade. By the closed-circuit micro-flotation experiment, satisfied grade index (18.7%Cu with 81% recovery) of the final concentrate was achieved, which could provide reference in industrial applications.

Efficiently Utilizing a Low Grade and Complex Copper Ore by Flotation

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.

Experimental Study on Flotation of a Yunnan Sulfide a Low Grade Copper Ore

2013 ◽  
Vol 734-737 ◽  
pp. 935-940
Author(s):  
Ju Wang ◽  
Hui Xin Dai ◽  
Yan Hua Guo
Keyword(s):  
Experimental Study ◽  
Copper Sulfide ◽  
Closed Circuit ◽  
Low Grade ◽  
Copper Ore ◽  
Concentrate Grade ◽  
Ore Grade

Based on a single Yunnan copper sulfide, we conducted a series of flotation test research. The results indicate that the raw ore grade is 0.78%,by closed circuit process of 1stage of roughing, 1stage of scavenging and 2 stages of cleaning flotation, 14.85% concentrate grade with 92.49% recovery can be obtained, and the index is ideal.

Recovery Copper from a Low Grade and Ultra-Fine-Grained Dissemination Mixed Copper Ore by Flotation

2013 ◽  
Vol 734-737 ◽  
pp. 962-966
Author(s):  
Yong Jun Xian ◽  
Shu Ming Wen ◽  
Hai Ying Shen ◽  
Qi Nie
Keyword(s):  
Yunnan Province ◽  
Copper Recovery ◽  
Test Scheme ◽  
Low Grade ◽  
High Recovery ◽  
Copper Ore ◽  
Copper Concentrate ◽  
Fine Grained ◽  
Ultrafine Grinding ◽  
Low Dosage

The present study aims to characterize the copper ore from east area of Yunnan province. The results indicate that the ores is a representative low grade and and ultra-fine-grained ore. As a result, a suitable flotation flow i.e. “ultrafine grinding- sulphidizing and dispersing - bulk flotation with low dosage collector” was presented for processing of eligible copper concentrate with high recovery and the main factors i.e. grinding fineness, regulators types and dosage and collector dosage affecting the indexes of roughing concentration was investigated. As a result, a close-circuit flotation test scheme was proceeded, which obtained a high quality copper concentrate with Cu grade of 25.12%, copper recovery of 87.63%. This index is successful in the aim of recovery copper for such mixed copper ore.

scholarly journals Recovery of γ-Fe2O3 from copper ore tailings by magnetization roasting and magnetic separation

2021 ◽  
Vol 19 (1) ◽  
pp. 128-137
Author(s):  
Bing Luo ◽  
Tongjiang Peng ◽  
Hongjuan Sun
Keyword(s):  
Magnetic Separation ◽  
Magnetic Field Intensity ◽  
Sodium Dodecyl ◽  
Separation Process ◽  
Sodium Dodecyl Sulfonate ◽  
Copper Ore ◽  
Yield Rate ◽  
Optimum Parameters ◽  
Roasting Temperature ◽  
Mineralogical Phase

Abstract To comprehensively reuse copper ore tailings, the recovery of γ-Fe2O3 from magnetic roasted slag after sulfur release from copper ore tailings followed by magnetic separation is performed. In this work, after analysis of chemical composition and mineralogical phase composition, the effects of parameters in both magnetization roasting and magnetic separation process with respect to roasting temperature, residence time, airflow, particle size distribution, magnetic field intensity, and the ratio of sodium dodecyl sulfonate to roasted slag were investigated. Under optimum parameters, a great number of γ-Fe2O3 is recycled with a grade of 66.86% and a yield rate of 67.21%. Meanwhile, the microstructure, phase transformation and magnetic property of copper ore tailings, roasted slag, and magnetic concentrate are carried out.

Insights into Heap Bioleaching at the Agglomerate-Scale

2017 ◽  
Vol 262 ◽  
pp. 185-188 ◽  
Author(s):  
Alison Cox ◽  
Christopher G. Bryan
Keyword(s):  
Interstitial Cell ◽  
Cell Concentration ◽  
Low Grade ◽  
Dissolved Metals ◽  
Copper Ore ◽  
Cell Numbers ◽  
Liquid Phases ◽  
Heap Bioleaching ◽  
Cell Concentrations ◽  
The Difference

Previous agglomerate-scale heap bioleaching studies have outlined the variations in cell numbers of the liquid and attached phases during colonisation of sterilised ore by a pure culture. In this study, a mixed mesophilic culture was used in agglomerate-scale columns containing non-sterilised low-grade copper ore. Over a six - month period, columns were harvested at various intervals to provide snapshots of the metal distribution and the quantity, location, and ecological variations of mineral-oxidizing microbes within the ore bed. The initial colonisation period in this experiment was dissimilar to previous work, as the indigenous community was retained within the ore-bed throughout acid agglomeration. The overall colonisation phase lasted for approximately 1,000 hours until cell concentrations stabilised. In each column, less than 0.05% of the total cells were found in the leachate, 15-20% in the interstitial phase and the remaining ~80% were attached to the mineral surface. Once cell numbers had stabilised, interstitial cell concentrations were approximately 2,000× greater than those in the leachate. This difference persisted for the duration of the experiment. Copper concentrations in the two liquid phases generally decreased over time, but were on average 50× higher in the interstitial phase. Iron concentrations were more stable, but again were 30× higher in the interstitial phase. This demonstrates that that the difference in cell concentration between the leachate and interstitial phases cannot be explained through diffusion gradients within the system as it is much greater than those observed for the dissolved metals. It also shows that the specific environmental conditions of the interstitial and attached cells are very different to those inferred through analysis of leachates alone.

Flotation Experimental Study of High-Sulfur Cu-Zn Ore in Yunnan

2014 ◽  
Vol 490-491 ◽  
pp. 160-163
Author(s):  
Zhi Guo Zhang ◽  
Quan Jun Liu ◽  
Jin Cheng Ran
Keyword(s):  
Experimental Study ◽  
Mineral Composition ◽  
Recovery Rate ◽  
Closed Circuit ◽  
Copper Concentrate ◽  
Concentrate Grade ◽  
And Control ◽  
Zinc Concentrate

The experimental ore belongs to high-sulfur Cu-Zn poly-metallic ore, the mineral composition of ore is complex, cupriferous pyrite most are disseminated. The Cu grade of raw ore is 0.76%, Zn grade is 1.48% and S about 25.02%. on the basis of best reagent system and control flotation time, the author did closed circuit process. the results of closed circuit process as follows: the copper concentrate grade is 20.35% and recovery rate is 86.081%; the zinc concentrate grade is 54.32% and recovery rate is 84.20%.

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