scholarly journals Parametric Optimization in Rougher Flotation Performance of a Sulfidized Mixed Copper Ore

Minerals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 660 ◽  
Author(s):  
Asghar Azizi ◽  
Mojtaba Masdarian ◽  
Ahmad Hassanzadeh ◽  
Zahra Bahri ◽  
Tomasz Niedoba ◽  
...  
Keyword(s):  
Parametric Optimization ◽  
Goal Function ◽  
Copper Recovery ◽  
Critical Parameters ◽  
Agitation Rate ◽  
Methyl Isobutyl ◽  
Copper Ore ◽  
Effective Factors ◽  
Flotation Cell ◽  
Flotation Performance

The dominant challenge of current copper beneficiation plants is the low recoverability of oxide copper-bearing minerals associated with sulfide type ones. Furthermore, applying commonly used conventional methodologies does not allow the interactional effects of critical parameters in the flotation processes to be investigated, which is mostly overlooked in the literature. To tackle this issue, the present paper aimed at characterizing the behavior of five key effective factors and their interactions in a sulfidized copper ore. In this context, dosage of collector (sodium di-ethydithiophosphate, 60–100 g/t), depressant (sodium silicate, 80–120 g/t) and frother (methyl isobutyl carbinol (MIBC), 6–10 g/t), pulp pH (7–11) and agitation rate (900–1300 rpm) were examined and statistically analyzed using response surface methodology. Flotation experiments were conducted in a Denver type agitated flotation cell at the rougher stage. The experimental results showed that increasing the pH (from 8 to 10) at low agitation rate (1000 rpm) enhanced the recovery from 80.36% to 85.22%, while at high agitation rate (1200 rpm), a slight declination occurred in the recovery. Meanwhile, increasing the collector dosage at a lower frother value (7 g/t), caused a reduction of about 4.44% in copper recovery owing to the interactions between factors, whereas at a higher frother level (9 g/t), the recovery was almost unchanged. The optimization process was also performed using the goal function approach, and maximum copper recovery of 92.75% was obtained using ~70 g/t collector, 110 g/t depressant, 7 g/t frother, pulp pH of 10 and 1000 rpm agitation rate.

scholarly journals Effects of Pyrite Texture on Flotation Performance of Copper Sulfide Ores

Minerals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1218
Author(s):  
İlkay B. Can ◽  
Seda Özçelik ◽  
Zafir Ekmekçi
Keyword(s):  
Copper Sulfide ◽  
Surface Cleaning ◽  
Copper Recovery ◽  
Sulfide Ores ◽  
Copper Ore ◽  
Ore Deposit ◽  
Framboidal Pyrite ◽  
Process Plant ◽  
Flotation Performance ◽  
Flotation Behavior

Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to demonstrate influence of pyrite mineralogy on the flotation of copper (sulphidic) ores and develop alternative conditions to improve the performance. Two copper ore samples (Ore A and Ore B) having different textural/modal mineralogy and flotation characteristics were taken from different zones of the same ore deposit. Ore B contained framboidal pyrite and altered pyrite/marcasite, which is considered the main reason for the low flotation performance in both copper and pyrite flotation sections of the process plant. Flotation tests were conducted under different conditions using the two ore samples and a 50:50 blend. The results showed that Ore A could be concentrated under the base conditions, as applied in the existing flotation plant. On the other hand, Ore B did not respond to the base conditions and a copper recovery of only 5% could be obtained. Besides, blending Ore B with Ore A negatively affected the flotation behavior of Ore A. An alternative flotation chemistry was applied on Ore B using Na2S for surface cleaning and Na-Metabisulfite (MBS) for pyrite depression in the copper flotation stage. The surface cleaning reduced the rate of oxidation of the framboidal pyrite in Ore B. As a result, the copper recovery could be increased to 52% Cu for Ore B, and 65% for the mixed ore sample.

Effects of Stator Configurations on the Flotation Performance of Induced Gas Flotation Machine

2016 ◽  
Author(s):  
Ji-Gu Lee ◽  
Ji-Yun Kang ◽  
Youn-Jea Kim
Keyword(s):  
Flow Characteristics ◽  
Chemical Plants ◽  
Oil Sand ◽  
Two Phase ◽  
Ansys Cfx ◽  
Commercial Code ◽  
Flotation Cell ◽  
Flotation Performance ◽  
Forced Air ◽  
Phase Water

Induced Gas Flotation (IGF) vessel is used for water treatment of plant industries such as oil sand and chemical plants. An understanding of the interaction between the stator and rotor is essential for the design of IGF with consideration of geometric blade configuration is essential for the design of IGF. In this study, the effect of the number of stator blades on flotation performance was numerically investigated using the commercial code, ANSYS CFX ver. 16.1. The two-phase (water and air) flow characteristics in the forced-air mechanically stirred Dorr-Oliver flotation cell were considered. The flotation performance was evaluated on the basis of the correlations among the number of stator blades (8, 12, 16, 20, 24), power number and void fraction. By comparing the result of each case, the newly designed model with 12 stator blades which had the highest flotation performance was derived.

Bioleaching of Low-Grade Copper Sulfide Ore Using a Colum Reactor

2009 ◽  
Vol 71-73 ◽  
pp. 409-412
Author(s):  
Wen Qing Qin ◽  
Yan Sheng Zhang ◽  
Shi Jie Zhen ◽  
Jun Wang ◽  
Jian Wen Zhang ◽  
...  
Keyword(s):  
Iron Concentration ◽  
Mixed Cultures ◽  
Copper Recovery ◽  
Low Grade ◽  
Leaching Rate ◽  
Ministry Of Education ◽  
Copper Ore ◽  
Copper Leaching ◽  
Pure Cultures ◽  
Mixed Bacteria

The effects of several variables on the column bioleaching of copper sulphide ore have been investigated. The copper ore contained chalcopyrite as the main sulfide minerals and bornite and chalcocite as the minor minerals. The experiment was carried out using bench-scale column leach reactors designed in Key Lab of Biometallurgy of Ministry of Education, which were inoculated with the pure mesophile bacteria (Acidithiobacillus ferrooxidans) and thermophile bacteria (Sulfobacillus), respectively, and the mixed bacteria which contain both iron- and sulfur-oxidizing bacteria. The results show that the mixed cultures were more efficient than the pure cultures alone and the maximum copper recovery 53.64% was achieved using the mixed cultures after 85 days. The leaching rate of chalcopyrite tended to increase with the increased dissolved ferric iron concentration. The effect of particle size on the rate of the copper leaching was also investigated, and it was shown that the copper bioleaching rate decreases as the amount of fines increase, which limits the permeability, thus decreases leaching rate. Jarosite and elemental sulphur formed in the column were characterized by the X-ray and EDS.

Influence of particle size on copper recovery from sulfide ore by the moderately thermophilic microorganisms

2019 ◽  
Vol 116 (1) ◽  
pp. 119
Author(s):  
Wen-bo Zhou ◽  
Kai Li ◽  
Yu-guang Wang ◽  
Li-juan Zhang ◽  
Hai-na Cheng ◽  
...  
Keyword(s):  
Particle Size ◽  
Xrd Analysis ◽  
Microbial Interactions ◽  
Copper Recovery ◽  
Mineral Particle ◽  
Copper Ore ◽  
Thermophilic Microorganisms ◽  
Moderately Thermophilic ◽  
Before And After ◽  
Leaching Condition

The bioleaching of copper ore by the defined moderately thermophilic consortium containing Leptospirillum ferriphilum and Acidithiobacillus caldus was carried out in the bench-scale column. Bioleaching experiments showed that the leaching rate was 25% higher than that of a conventional leaching and the acid consumption was reduced by 33% at the optimal leaching condition. Meanwhile, the effect of different particle sizes on the rate of the copper leaching was also investigated, and it was shown that the particle size affects the bioleaching rate significantly in the range of 5–25 mm, in which approximately 89.27% of copper was extracted at 5–10 mm, while only 57.08% at 15–25 mm. The results obtained by X-ray diffraction (XRD) analysis of the mineral samples before and after microbial and chemical leaching revealed that the decrease in particle size of the minerals resulted in an enhancement of complex microbial interactions. Especially for the particle size of 5–10 mm, a significant amount of elemental sulfur and jarosite formed on the surface of the mineral, while it was further confirmed that critical microbe-mineral interactions have taken place on the mineral surface. The results indicated that mineral particle size is an integral factor to improve the copper recovery from ore in heap leaching operation. This will provide a reference to the heap construction for the bioleaching.

A Study of the Optimal Model of the Flotation Kinetics of Copper Slag from Copper Mine BOR

2014 ◽  
Vol 59 (3) ◽  
pp. 821-834 ◽  
Author(s):  
Rodoljub D. Stanojlović ◽  
Jovica M. Sokolović
Keyword(s):  
Pure Copper ◽  
Copper Slag ◽  
Copper Recovery ◽  
Optimal Model ◽  
Flotation Kinetics ◽  
Kinetics Parameters ◽  
Flotation Tailings ◽  
Copper Mine ◽  
Flotation Cell ◽  
Kinetics Of

Abstract In this study the effect of mixtures of copper slag and flotation tailings from copper mine Bor, Serbia on the flotation results of copper recovery and flotation kinetics parameters in a batch flotation cell has been investigated. By simultaneous adding old flotation tailings in the ball mill at the rate of 9%, it is possible to increase copper recovery for about 20%. These results are compared with obtained copper recovery of pure copper slag. The results of batch flotation test were fitted by MatLab software for modeling the first-order flotation kinetics in order to determine kinetics parameters and define an optimal model of the flotation kinetics. Six kinetic models are tested on the batch flotation copper recovery against flotation time. All models showed good correlation, however the modified Kelsall model provided the best fit.

scholarly journals Copper Recovery from Silicate-Containing Low-Grade Copper Ore Using Flotation Followed by High-Pressure Oxidative Leaching

2017 ◽  
Vol 64 (1) ◽  
pp. 3-14 ◽  
Author(s):  
Baisui HAN ◽  
Batnasan ALTANSUKH ◽  
Kazutoshi HAGA ◽  
Yasushi TAKASAKI ◽  
Atsushi SHIBAYAMA
Keyword(s):  
High Pressure ◽  
Copper Recovery ◽  
Low Grade ◽  
Copper Ore ◽  
Oxidative Leaching

Primary Copper Ore Leaching by Leaching Solution Adjusted Oxidation-Reduction Potential in Column

2015 ◽  
Vol 1130 ◽  
pp. 355-358
Author(s):  
Tatsuya Shinkawa ◽  
Taro Kamiya ◽  
Kazuhiro Kojima ◽  
Tadashi Chida
Keyword(s):  
Sulfuric Acid ◽  
Recovery Rate ◽  
Copper Sulfide ◽  
Copper Recovery ◽  
Copper Ore ◽  
Column Leaching ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Copper Leaching ◽  
Leaching Solution

Copper ore is classified into three groups; primary copper sulfide, copper oxide and secondary copper sulfide. Leaching copper from primary copper sulfide, such as chalcopyrite, with sulfuric acid takes longer time than from copper oxide and secondary copper sulfide. As such, an oxidant is required to extract copper from chalcopyrite. In this study, column leaching tests were carried out using primary copper sulfide ores produced in an iron oxide copper gold (IOCG) deposit and rich in iron in coparison to porphyry copper ores. The columns of 10 cm diameter and 100 cm long had a double tube structure so that the column temperature can be kept at desired temperature by circulating warm water in the outer tube. The oxidation-reduction potential (ORP) of the leaching solutions were adjustedto 400, 450 and 500 mV vs Ag/AgCl. The column leaching test using just pH 2.0 sulfuric acid without adjustment of ORP at 45 °C got a copper recovery rate of 37 % in 400 days. On the other hand, with ORP adjusted leaching solutions of pH 2.0 sulfuric acid containing 500 mg/L Fe, the copper recovery rate reached up to 87 % in 400 days.In addition, it was necessary to keep the temperature above 45 oC to enhance copper leaching by ORP adjusted leaching solution. The result of the column leaching test at room temperature (around 30 °C) using ORP adjusted leaching solution shows that the recovery rate of copper is lower than the result at 45 °C. The ORP adjustment of leaching solution is effective for leaching copper from primary copper sulfide ore, however, the leaching temperature needs to be kept above 45 °C. As a result, it makes clear that copper leaching is enhanced by utilization of ORP adjusted leaching solutions and suggests that the solution ORP control is important to the application of bioleaching.

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.

Synthesis of 2-ethyl-2-hexenal oxime and its flotation performance for copper ore

2014 ◽  
Vol 66-68 ◽  
pp. 173-180 ◽  
Author(s):  
Haifeng Xu ◽  
Hong Zhong ◽  
Shuai Wang ◽  
Yanan Niu ◽  
Guangyi Liu
Keyword(s):  
Copper Ore ◽  
Flotation Performance
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