Recovery of Ultrafine Copper Oxide Mineral with Vacuum Flotation

2012 ◽  
Vol 524-527 ◽  
pp. 1047-1053 ◽  
Author(s):  
Dian Wen Liu ◽  
Jian Jun Fang ◽  
Xiao Lin Zhang ◽  
Shao Jun Bai ◽  
Zhi Cong Wei ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Yunnan Province ◽  
Size Fraction ◽  
Low Grade ◽  
Fine Grained ◽  
Copper Loss ◽  
Oxide Mineral ◽  
Oxide Deposit ◽  
Oxidation Ratio ◽  
Ultrafine Copper

Tangdan copper oxide ore deposit, located in the northeast Yunnan province of China, is the largest independent copper oxide deposit in China. The ore from the deposit is characterized by low grade, high oxidation ratio and fine-grained dissemination, which results in the poor flotation recovery. The analysis of plant flotation data reveals that the loss of copper minerals into tailings is mainly with coarse size fraction, due to its insufficient liberation and finer size, especially for the size fraction below 10 microns, which are very difficult to be floated with conventional flotation methods. In order to improve the flotation performance of the ore, laboratory tests include Hallimond flotation and vacuum flotation were respectively conducted with pure malachite, the dominant copper oxide mineral in the deposit; and the results indicate that a finer grinding fineness up to -325 mesh even -400 mesh is required to decrease the copper loss in the coarse size fraction, and vacuum flotation provides a promising way for the recovery of ultrafine malachites.

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.

scholarly journals Rocovering Low Grade Copper Oxide Mineral from Copper Sulphide Ore

FLOTATION ◽  
1967 ◽  
Vol 1967 (31) ◽  
pp. 39-42
Author(s):  
Tsuneji EJIMA ◽  
Tadao TAHARA
Keyword(s):  
Copper Oxide ◽  
Low Grade ◽  
Copper Sulphide ◽  
Oxide Mineral ◽  
Sulphide Ore

Recovery Cu from a Copper Oxide Ore by Flotation and Leaching

2014 ◽  
Vol 522-524 ◽  
pp. 1484-1487
Author(s):  
Chao Lv ◽  
Shu Ming Wen ◽  
Shao Jun Bai ◽  
Yi Jie Wang ◽  
Ci Yun Chen
Keyword(s):  
Copper Oxide ◽  
Acid Leaching ◽  
Low Grade ◽  
Liquid Ratio ◽  
Total Recovery ◽  
Flotation Tailings ◽  
Copper Concentrate ◽  
High Oxidation ◽  
Oxidation Ratio ◽  
Leaching Efficiency

The copper oxide ore is high oxidation ratio and the high combination ratio with a low grade of Cu 0.71%. Copper concentrate of Cu 15.02% with a recovery of 38.55% was obtained by flotation. The optimum acid leaching conditions were investigated. Effects of lixiviant concentration, solid-to-liquid ratio, leaching time were investigated. The acid leaching efficiency was 78.75% relative to flotation tailings. By the combination of flotation and acid leaching flotation tailings, most of the Cu in the minerals can be enriched, the total recovery of copper reached 86.85%.

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.

TEM/AEM characterization of fine-grained clay minerals in very-low-grade rocks: Evaluation of contamination by empa involving celadonite family minerals

1996 ◽  
Vol 54 ◽  
pp. 694-695
Author(s):  
Gejing Li ◽  
D. R. Peacor ◽  
D. S. Coombs ◽  
Y. Kawachi
Keyword(s):  
Electron Microscopy ◽  
Volcanic Rocks ◽  
Analytical Electron Microscopy ◽  
Metamorphic Rocks ◽  
New Mineral ◽  
Chemical Compositions ◽  
Low Grade ◽  
Fine Grained ◽  
Depth Analysis ◽  
Mineral Aggregates

Recent advances in transmission electron microscopy (TEM) and analytical electron microscopy (AEM) have led to many new insights into the structural and chemical characteristics of very finegrained, optically homogeneous mineral aggregates in sedimentary and very low-grade metamorphic rocks. Chemical compositions obtained by electron microprobe analysis (EMPA) on such materials have been shown by TEM/AEM to result from beam overlap on contaminant phases on a scale below resolution of EMPA, which in turn can lead to errors in interpretation and determination of formation conditions. Here we present an in-depth analysis of the relation between AEM and EMPA data, which leads also to the definition of new mineral phases, and demonstrate the resolution power of AEM relative to EMPA in investigations of very fine-grained mineral aggregates in sedimentary and very low-grade metamorphic rocks.Celadonite, having end-member composition KMgFe3+Si4O10(OH)2, and with minor substitution of Fe2+ for Mg and Al for Fe3+ on octahedral sites, is a fine-grained mica widespread in volcanic rocks and volcaniclastic sediments which have undergone low-temperature alteration in the oceanic crust and in burial metamorphic sequences.

A detailed 40Ar/39Ar age study of an Abitibi dike from the Canadian Superior Province

1979 ◽  
Vol 16 (5) ◽  
pp. 1060-1070 ◽  
Author(s):  
J. A. Hanes ◽  
Derek York
Keyword(s):  
Canadian Shield ◽  
Superior Province ◽  
Low Grade ◽  
Polar Wander ◽  
Mafic Mineral ◽  
Fine Grained ◽  
Apparent Polar Wander Path ◽  
Step Heating ◽  
Apparent Age ◽  
Hydrothermal Event

40Ar/39Ar step-heating analyses were performed on 11 felsic and mafic mineral separates from a 90 m wide Precambrian diabase dike of the Abitibi swarm in the Superior Province of the Canadian Shield. Deuterically altered minerals from the dike interior define a primary age of 2150 ± 25 Ma. Updated ages, obtained from felsic separates within 30, and mafic within 1.5 m of the dike border, are evidence of a previously undetected 'Hudsonian' (1.7–1.8 Ga) hydrothermal event in the area. It is possible to distinguish the deuteric from the later hydrothermal alteration by both dating and petrographic methods. The data from this study demonstrate the successful application of 40Ar/39Ar dating to early Proterozoic dikes which have suffered low grade metamorphism. The ages support a north to south sense of motion of the Track 5 apparent polar wander path (APWP). A monotonic decrease in apparent age of felsic spectra indicates reactor induced recoil effects which are correlated with the fine-grained saussurite in the feldspar.

Matrix Diffusion of Some Alkali- and Alkaline Earth-Metals in Granitic Rock

1996 ◽  
Vol 465 ◽  
Author(s):  
H. Johansson ◽  
J. Byegård ◽  
G. Skarnemark ◽  
M. Skålberg
Keyword(s):  
Alkaline Earth ◽  
Tritiated Water ◽  
Size Fraction ◽  
Effective Diffusivity ◽  
Alkaline Earth Metals ◽  
Capacity Factor ◽  
Dimensional Solution ◽  
Crushed Material ◽  
Fine Grained ◽  
Effective Diffusivities

ABSTRACTStatic through-diffusion experiments were performed to study the diffusion of alkali- and alkaline earth-metals in fine-grained granite and medium-grained Äspö-diorite. Tritiated water was used as an inert reference tracer. Radionuclides of the alkali- and alkaline earth-metals (mono- and divalent elements which are not influenced by hydrolysis in the pH-range studied) were used as tracers, i.e. 22Na+, 45Ca2+ and Sr The effective diffusivity and the rock capacity factor were calculated by fitting the breakthrough curve to the one-dimensional solution of the diffusion equation. Sorption coefficients, Kd, that were derived from the rock capacity factor (diffusion experiments) were compared with Kd determined in batch experiments using crushed material of different size fractions.The results show that the tracers were retarded in the same order as was expected from the measured batch Kd. Furthermore, the largest size fraction was the most representative when comparing batch Kd with Kd evaluated from the diffusion experiments. The observed effective diffusivities tended to decrease with increasing cell lengths, indicating that the “transport” porosity decreases with increasing sample lengths used in the diffusion experiments.

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