scholarly journals Accelerating Copper Leaching from Sulfide Ores in Acid-Nitrate-Chloride Media Using Agglomeration and Curing as Pretreatment

Minerals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 250 ◽  
Author(s):  
Pía C. Hernández ◽  
Junior Dupont ◽  
Osvaldo O. Herreros ◽  
Yecid P. Jimenez ◽  
Cynthia M. Torres
Keyword(s):  
Copper Sulfide ◽  
Chloride Concentration ◽  
Copper Extraction ◽  
Copper Dissolution ◽  
Three Samples ◽  
Copper Leaching ◽  
Sulfide Ore ◽  
Higher Temperature ◽  
Pretreatment Conditions ◽  
Copper Sulfide Ore

This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini-columns in acid-nitrate-chloride media. Ten pretreatment tests were conducted to evaluate different variables, namely the addition of nitrate as NaNO3 (11.7 and 23.3 kg/ton), chloride as NaCl (2.1 and 19.8 kg/ton), curing time (20 and 30 days) and repose temperature (25 and 45 °C). The optimum copper extraction of 58.6% was achieved with the addition of 23.3 kg of NaNO3/ton, 19.8 kg of NaCl/ton, and after 30 days of curing at 45 °C. Under these pretreatment conditions, three samples of ore were leached in mini-columns. The studied parameters were temperature (25 and 45 °C) and chloride concentration (20 and 40 g/L). The optimum copper extraction of 63.9% was obtained in the mini-column leaching test at 25 °C, with the use of 20 g/L of chloride. A higher temperature (45 °C) and a higher chloride concentration (40 g/L) negatively affected the extraction. The pretreatment stage had favorable effects, in terms of accelerating copper dissolution and improving leaching of copper sulfide ore in acid-nitrate-chloride media. Waste salts from caliche industry and waste brine from reverse osmosis can be used for providing the nitrate and chloride media.

Investigation of Bioleaching of a Low Grade Nickel-Cobalt-Copper Sulfide Ore with High Magnesium as Olivine and Serpentine from Lao

2013 ◽  
Vol 825 ◽  
pp. 396-400 ◽  
Author(s):  
Bo Wei Chen ◽  
Liu Lu Cai ◽  
Biao Wu ◽  
Xue Liu ◽  
Jian Kang Wen
Keyword(s):  
Copper Sulfide ◽  
Nickel Sulfide ◽  
Low Grade ◽  
Nickel Cobalt ◽  
Nickel Silicate ◽  
Copper Leaching ◽  
Sulfide Ore ◽  
Initial Ph ◽  
Copper Sulfide Ore ◽  
Cobalt Copper

Shake flask bioleaching of a low-grade nickel-cobalt-copper sulfide ore from Lao was investigated to test the technical feasibility to recovery metals from this ore. The mineralogical results indicated that the valuable minerals were disseminated finely and the ore had a low content of sulfur and high content of iron and magnesium, which was very harmful for bioleaching. The effects of different parameters such as the amount of acid addition, inoculation volume, initial pH, temperature and leaching time on the bioleaching performance of the ore were evaluated after pre-leaching with dilute acid. The results showed that nickel, cobalt, copper leaching rates reached 81.61%, 80.75%, 70.97% at 33 °C and 83.40%, 82.13%, 70.34% at 45 °C. The mineralogical analysis of the leaching residues revealed that the leaching rate of nickel sulfide was more than 92% and the unleached nickel was mainly present as nickel silicate.

scholarly journals Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous Media

Minerals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 312 ◽  
Author(s):  
Karina Salinas ◽  
Osvaldo Herreros ◽  
Cynthia Torres
Keyword(s):  
Copper Sulfide ◽  
Porphyry Copper ◽  
Copper Deposit ◽  
Porphyry Copper Deposit ◽  
Copper Extraction ◽  
Leaching Tests ◽  
Chemical Leaching ◽  
Sulfide Ore ◽  
Two Temperatures ◽  
Copper Sulfide Ore

Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in columns loaded with approximately 50 kg of agglomerated ore; the ore was first cured for 14 days and then leached for 90 days. The highest copper extraction, 50.23%, was achieved at 32.9 °C with the addition of 0.6 kg of H2SO4 per ton of ore, 0.525 kg of NaCl per ton of ore, and 0.5 kg of FeSO4 per ton of ore. In respect to copper extraction, the most effective variables were temperature and the addition of NaCl.

Experimental Study of Floatation on Non-Independent Copper Oxide Ore from Jilin Province in China

2012 ◽  
Vol 581-582 ◽  
pp. 851-855
Author(s):  
Rong Dong Deng ◽  
Quan Jun Liu ◽  
Xiao Feng Yang ◽  
Ting Hu ◽  
Feng Hong Ye
Keyword(s):  
Copper Oxide ◽  
Copper Sulfide ◽  
Jilin Province ◽  
High Grade ◽  
High Recovery ◽  
Copper Ore ◽  
Sulfide Ore ◽  
Mineralogical Study ◽  
Oxide Minerals ◽  
Copper Sulfide Ore

Through the processing of mineralogical study on a copper ore from Jilin province in China, it found that the copper exist mostly with the form of chalcopyrite, and others exist with the form of copper oxide minerals which with complex ingredient. The copper oxide minerals are due to the altered of the edge of chalcopyrite, and have not formed the independent copper oxide ore. It belongs to unconventional hard-to-beneficiate copper ore. Coarse grinding fineness and bulk floatation was used to recover the copper oxide ore and copper sulfide ore by using amino double phosphoric acid and butylamine dithiophosphate as the collector. This process was similar to the carrier flotation and achieved an effective processing of the copper oxide ore and obtained a high-grade copper concentrate assaying 15.8% with a high recovery of 82.4%.

Characterization of microbial community in industrial bioleaching heap of copper sulfide ore at Monywa mine, Myanmar

2016 ◽  
Vol 164 ◽  
pp. 355-361 ◽  
Author(s):  
Yan Jia ◽  
Heyun Sun ◽  
Defang Chen ◽  
Hongshan Gao ◽  
Renman Ruan
Keyword(s):  
Microbial Community ◽  
Copper Sulfide ◽  
Sulfide Ore ◽  
Copper Sulfide Ore

Research on Flotation of Copper Sulfide Ore in Yunnan Province

2014 ◽  
Vol 522-524 ◽  
pp. 1471-1475
Author(s):  
Tie Min Zhang ◽  
Jian Jun Fang ◽  
Tai Guo Jiang ◽  
Shan Wang ◽  
Ying Bo Mao
Keyword(s):  
Experimental Research ◽  
Copper Sulfide ◽  
Yunnan Province ◽  
Separation Process ◽  
Process Conditions ◽  
Successful Recovery ◽  
Sulfide Ore ◽  
Test Requirements ◽  
Copper Sulfide Ore

Floatation experimental research is carried out on a certain complicated ore containing mixed sulphides in Yannan province. For the characteristics of the mine and the scene of the test requirements, the use of mixed flotation-separation process has achieved a successful recovery of useful elements. Combination inhibitors can effectively achieve the separation of copper and sulfur .Under the proper process conditions ,the good technical indexes were obtained.

Patterned Copper Sulfide Thin Films: a Method for Studying Leaching Behaviour

2017 ◽  
Vol 70 (1) ◽  
pp. 26
Author(s):  
Rachel S. Brokenshire ◽  
Anthony Somers ◽  
Miao Chen ◽  
Angel A. J. Torriero
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Copper Extraction ◽  
Redox Potentials ◽  
X Ray ◽  
Copper Dissolution ◽  
Copper Leaching ◽  
Dissolution Behaviour ◽  
Leaching Behaviour ◽  
Resultant Film

An experimental study on copper leaching from Cu1.85S thin films is presented, wherein copper extraction is quantitatively evaluated by changes in film thickness measured by white light interferometric profilometry. Changes in the film morphology and elemental composition, as assessed by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, are used to confirm that the loss in film thickness is due to changes in the copper content and that the resultant film species is consistent with the mechanism of copper dissolution. The Cu1.85S thin films were synthesized by chemical bath deposition. The leaching behaviour of copper from the films was investigated in acidic ferric sulfate media at pHs 1, 2, and 3, and pH 1 at redox potentials of ~350–650 mV versus Ag/AgCl in 3 M KCl. The changes in the film thickness and copper sulfur ratio were shown to reflect copper dissolution behaviour from chalcocite. Leaching of the Cu1.85S films demonstrated a greater decrease in film thickness as pH decreased. In addition comparison of the order of reaction as a function of proton concentration in non-oxidative dissolution of Cu1.85S (0.06) and as a function of iron(iii) concentration in ferric oxidation of Cu1.85S (0.40) shows that the proton dissolution reaction is negligible. Leaching of the Cu1.85S films at redox potentials of up to ~476.4 mV versus Ag/AgCl in 3 M KCl produced covellite and demonstrated greater decreases in film thickness with increases in the redox potential. Leaching of the films above ~476.4 mV resulted in the formation of spionkopite and demonstrated a much lesser decrease in film thickness. These results are consistent with Eh-pH diagrams for the Cu–S–H2O system.

Bio-Heap Leaching of Primary Copper Sulfide Ore by JOGMEC

2017 ◽  
Vol 262 ◽  
pp. 99-102
Author(s):  
Tatsuya Shinkawa ◽  
Tadashi Chida ◽  
So Furukawa ◽  
Taro Kamiya
Keyword(s):  
Copper Sulfide ◽  
Heap Leaching ◽  
Sulfide Ores ◽  
High Iron Content ◽  
Iron Oxidizing Bacteria ◽  
Acid Consumption ◽  
Sulfide Ore ◽  
Leaching Solution ◽  
Sulfur Oxidizing ◽  
Copper Sulfide Ore

JOGMEC has been carrying out the study on primary copper sulfide ores leaching for recovering copper economically and efficiently by heap leaching. In our study, we have been using the primary copper sulfide ore produced in an IOCG deposit. The ore is characterized by high iron content and high acid consumption in leaching. For the optimization of the leaching, the conditions such as ore size, agglomeration, pH and irrigation rate of leaching solution were examined with column leach tests. The best result was over 80 % extraction of copper in 150 days with leaching solution of 1 M sulfuric acid and temperature of 45 °C. In this experiment, the fines of the ore sample were removed before putting it into the column to keep the permeability of the ore bed. In these column leach tests, the Fe2+/total-Fe ratio of PLS decreased gradually by the activity of naturally grown iron-oxidizing bacteria. The bacteria in PLS, which have the ability of iron-oxidizing and sulfur-oxidizing, were identified by next-generation sequencing as Acidithiobacillus caldus and Sulfobacillus thermosulfidooxidans. We also carried out bench-scale tests with about 200 tons of the primary copper sulfide ores. Iron-oxidizing and sulfur-oxidizing bacteria were identified in the leaching solution as same with column leach tests. It is considered that the bacteria worked in the leaching solution and on the surface of the ores.

The effect of a new polysaccharide on the depression of talc and the flotation of a nickel–copper sulfide ore

2015 ◽  
Vol 77 ◽  
pp. 99-106 ◽  
Author(s):  
Kaile Zhao ◽  
Guohua Gu ◽  
Changliang Wang ◽  
Xiying Rao ◽  
Xiaohui Wang ◽  
...  
Keyword(s):  
Copper Sulfide ◽  
Nickel Copper ◽  
Sulfide Ore ◽  
Copper Sulfide Ore

Effect of water quality on the leaching of a low-grade copper sulfide ore

2014 ◽  
Vol 58 ◽  
pp. 39-51 ◽  
Author(s):  
H.R. Watling ◽  
D.W. Shiers ◽  
J. Li ◽  
N.M. Chapman ◽  
G.B. Douglas
Keyword(s):  
Water Quality ◽  
Copper Sulfide ◽  
Low Grade ◽  
Effect Of Water ◽  
Sulfide Ore ◽  
Copper Sulfide Ore

Recovery Copper from a Complex Copper Sulfide Ore of Yunnan by Using Flotation

2015 ◽  
Vol 737 ◽  
pp. 839-842
Author(s):  
Yi Jie Wang ◽  
Shu Ming Wen ◽  
Dan Liu ◽  
Chuan Fa Cui ◽  
Bin Zhang
Keyword(s):  
Copper Sulfide ◽  
Sodium Sulfide ◽  
Optimal Conditions ◽  
Copper Ore ◽  
Copper Concentrate ◽  
Sulfide Ore ◽  
Open Test ◽  
Copper Sulfide Ore ◽  
Complex Copper ◽  
Large Deposits

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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