Development of the processing technology for porphyry copper ores of the Tominsky deposit

2021 ◽  
pp. 9-14
Author(s):  
I. A. Kuznetsova ◽  
I. I. Maksimov
Keyword(s):  
Copper Content ◽  
Silver Content ◽  
Porphyry Copper ◽  
Processing Technology ◽  
Copper Recovery ◽  
Gold Content ◽  
Closed Cycle ◽  
Process Studies ◽  
Copper Ores ◽  
Percentage Ratio

The article presents the results of the studies for the porphyry copper ores of the Tominsky deposit conducted to develop the respective processing technology. These process studies had been carried out since 2011 jointly by the TOMS Institute, Outotec, and JSC Mekhanobr Engineering. The experiments were carried out in 2017 at the laboratory of Mekhanobr Engineering using an ore charge from the Tominsky deposit and its Kalinovsky area with the percentage ratio of 75:25, copper content of 0.37 wt%, gold content of 0.09 g/t, and silver content of 0.89 g/t. The closed-cycle experiments yielded copper concentrates containing 20.7 wt% of copper, 3.95 g/t of gold, and 39.9 g/t of silver, with the recoveries of 90.27, 72.71 and 72.45 %, respectively. According to the results of the studies, the following technology was recommended for the design of the concentrator for the ores of the Tominsky deposit: semi-autogenous grinding and ball milling of the ore to 85 % passing –0.071 mm, rougher and scavenger flotation, rougher concentrate regrinding to 80 % passing –0.035 mm and two cleaner flotation stages for the rougher concentrate to obtain grade KM-5 copper concentrate with the mass fraction of copper of 20 % and copper recovery of 85 %. The concentrator of JSC Tominsky GOK, designed by JSC Mekhanobr Engineering, was put into pilot operation in 2020 and has reached its design performance.

OPTIMIZATION OF THE PROCESSING TECHNOLOGY OF COPPER ORES OF THE UDOKAN DEPOSIT

2021 ◽  
Vol 27 (7) ◽  
pp. 33-40
Author(s):  
А. Fatyanov ◽  
◽  
S. Scheglova ◽  
Keyword(s):  
Raw Materials ◽  
Energy State ◽  
Copper Deposit ◽  
Electrochemical Treatment ◽  
Processing Technology ◽  
Flotation Process ◽  
Composition And Structure ◽  
Process Studies ◽  
The Subject ◽  
Copper Ores

The composition of the mineral raw materials of the Udokan copper deposit has been studied. It is established that the copper minerals antlerite and brochantite are represented both in the form of ordinary and crystal hydrate forms, the properties of which are reflected in the flotation process. Studies were carried out on sulfide, mixed and oxidized samples of ores from the Udokan deposit. A unified flotation scheme for processing such ores with the production of sulfide and mixed copper concentrate with subsequent hydro- and pyrometallurgical methods is recommended. The objects of research are sulfide, mixed and oxidized copper ores of the Udokan deposit. The subject of the study is the technology of processing copper ores. Research objectives: – study of the mineral, material, and chemical composition of copper ores of the Udokan deposit; – study of existing technologies for processing copper ores; – conducting laboratory experiments on sulfide, mixed and oxidized ore samples of the Udokan deposit; – recommendation of a unified enrichment scheme for all types of copper ores of the Udokan deposit. Research methods. The work was carried out on the basis of studying the available sources on the occurrence, composition and structure of copper ores of the Udokan deposit, methods of their processing. In the course of laboratory studies, a flotation method of mineral enrichment was used with the use of operations to stabilize the energy state of the dispersed system (with Eh control) and subsequent electrochemical treatment of the pulp. The authors emphasize that the recommended scheme for processing copper ores from the Udokan deposit will optimize the processing technology and increase the efficiency of mining this deposit. Hydro- and pyrometallurgical methods are the most optimal for processing the obtained sulfide and mixed concentrates

scholarly journals Металлогения Конгинской зоны Омолонского террейна (Северо-Восток Азии)

2021 ◽  
pp. 3-16
Author(s):  
A. N. Glukhov ◽  
◽  
V. V. Priymenko ◽  
M. I. Fomina ◽  
V. V. Akinin ◽  
...  
Keyword(s):  
Porphyry Copper ◽  
Gold Silver ◽  
Copper Gold ◽  
Polymetallic Mineralization ◽  
Polymetallic Ore ◽  
Copper Ores

The article presents new data on geology, mineralogy, and geochemistry of porphyry-copper, gold-silver, and silver-polymetallic ore occurrences in the Kongin magmatic zone of the Omolon terrane and granitoids, associated with it. It has been demonstrated that petrology and the age of granitoids are similar to those in the OCVB Penzhina segment. Mineralization of the Kongin zone is very close to that of the OCVB, differing in relatively high Mo in porphyry-copper ores and prevalence of silver-polymetallic mineralization over gold-silver.

scholarly journals Gold Deposits in Chile

2021 ◽  
Vol 48 (1) ◽  
pp. 1
Author(s):  
José Cabello
Keyword(s):  
Porphyry Copper ◽  
Gold Deposits ◽  
Ore Deposits ◽  
Gold Content ◽  
Base Metals ◽  
Porphyry Copper Deposits ◽  
Copper Deposits ◽  
Mineralization Age ◽  
Low Sulfidation ◽  
Gold Bearing

A review of gold and gold bearing base metals deposits in Chile, indicate the existence of at least six different type of ore deposits, most largely formed during the Cenozoic with predominance in the Miocene. Mesozoic deposits are common but less relevant regarding their size and gold content. These hydrothermal ore deposits are genetically associated with subduction related Andean arc magmatism. Due to its relationship with episodic magmatism migrating eastward, there is a tendency for the deposits to be in distinct, north-south trending, belts with a progressive west to east decrease in mineralization age. After analysing 82 cases in total, main gold concentration can be assigned to high-sulfidation epithermal and porphyry type deposits. Low-sulfidation epithermal, IOCG and mesothermal type appears as less relevant. Gold bearing copper deposits constitute an important part of Chile’s total gold production. Both IOCG type but especially porphyry copper deposits are and will remain as a substantial source to supplement the future output of the gold in the country. The 82 deposits with their tonnage and grade studied, represent a total gold content of 11,662 t equivalent to 375 Moz, excluding past production for those exploited. A number of probable gold bearing base metals high tonnage deposits (IOCG and porphyry copper) do not include their gold content in public format, hence the number delivered could be estimated conservative. Methodical geochronological, ore types and zonation studies are required to better appreciate this metallogenic setting widening current understanding and future exploration results.

scholarly journals Determination of Au(III) and Ag(I) in Carbonaceous Shales and Pyrites by Stripping Voltammetry

Minerals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 78 ◽  
Author(s):  
Nina Kolpakova ◽  
Zhamilya Sabitova ◽  
Victor Sachkov ◽  
Rodion Medvedev ◽  
Roman Nefedov ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
High Pressures ◽  
Silver Content ◽  
Background Electrolyte ◽  
Stripping Voltammetry ◽  
Gold Content ◽  
Carbonaceous Matter ◽  
Standard Samples ◽  
Carbonaceous Shales

Techniques of stripping voltammetry (SV) determination of silver and gold in pyrites and carbonaceous matter are developed. The problem of quantitative transfer of the analytes into the solution is solved. For this purpose, the ore matrix of carbonaceous shales was decomposed by mineral acids in autoclaves at high pressures. The element to be determined from the sample matrix was separated by extraction. Ag(I) ions from the solutions were extracted in the form of a dithizonate complex in CCl4. Au(III) ions were extracted by diethyl ether. The extracts were decomposed thermally. The dry residue was dissolved in the background electrolyte, and the element was determined by the SV method. The graphite electrode (GE) impregnated with polyethylene was used as a working electrode in the SV determination of silver. The SV determination of gold was carried out using a GE modified by bismuth. The limits of detection (LOD) of Ag(I) and Au(III) contents were equal to 0.016 mg L−1 and 0.0086 mg L−1, respectively. The results of SV determination of gold and silver in standard samples, pyrites, and carbonaceous shales were presented. The silver content in the pyrite was 13.6 g t−1, and in carbon shale it was 0.34 g t−1. The concentration of gold in the pyrite of the Kirovsko–Kryklinskaya ore zone was 1.15 g t−1, while in carbonaceous shales it was 2.66 g t−1. The obtained data were consistent with the data of atomic emission spectroscopy (AES) and inductively-coupled plasma mass spectrometry (ICP–MS). The error of determination of elements by stripping voltammetry was calculated as ranging from 10 to 6 g t−1 (less than 12%) in pyrite and carbonaceous material when determining the silver content, and from 1 to 3 g t−1 (less than 22%) when determining the gold content in pyrite and carbonaceous matter.

Management of Copper Heap Leach Projects: A Geologist’s Perspective

SEG Discovery ◽  
2020 ◽  
pp. 13-25 ◽  
Author(s):  
John E. Dreier
Keyword(s):  
Porphyry Copper ◽  
Operating Cost ◽  
Heap Leaching ◽  
Leach Solution ◽  
Copper Oxides ◽  
Copper Recovery ◽  
Copper Production ◽  
Heap Leach ◽  
Acid Consumption ◽  
Copper Heap Leaching

Editor’s note: The Geology and Mining series, edited by Dan Wood and Jeffrey Hedenquist, is designed to introduce early-career professionals and students to a variety of topics in mineral exploration, development, and mining, in order to provide insight into the many ways in which geoscientists contribute to the mineral industry. Abstract Copper production by heap leaching, coupled with solvent extraction and electrowinning (SX-EW), is a well-established technology, with an annual output of about 3.7 million tonnes (Mt) of copper metal. Ores presently amenable to copper heap leaching include copper oxides and secondary copper sulfides. Most copper deposits amenable to acid sulfate heap leaching result from supergene processes within porphyry copper systems, although copper heap leaching has been applied to sandstone and shale-hosted deposits, among others. Copper heap leaching is a rate-dependent process sensitive to copper mineralogy (copper oxides > secondary sulfides > hypogene sulfides), driven by the pH of the leach solution, the activity of ferric iron (Fe3+ (aq)) dissolved in the leach solution, and temperature. Acid consumption, a principal operating cost item, depends on the pH of the leach solution; the presence of reactive gangue minerals, notably carbonates, Ca plagioclase, pyroxene, Fe-rich amphibole, and olivine; and the cumulative surface area of material in the heap. There are three basic approaches to commercial copper heap leaching—run-of-mine, dedicated pad, and on-off pad leaching, with variables that include crushing, acid/ferric agglomeration, solution application rate, and leach solution pH. These approaches affect copper leach kinetics, overall copper recovery, acid consumption, and capital and operating costs. A successful copper heap leach evaluation program requires a systematic approach, beginning with geologic mapping, then drilling and hydraulic and metallurgical testing, and concluding with financial analysis, engineering, and permitting. As geologists are the unique party in the process, with a thorough understanding of the overall deposit geology, including ore and gangue mineralogy, the domains that comprise the deposit, and the geochemistry of leaching, they must remain fully involved in the project throughout the evaluation. At the outset, geologists must manage the drilling program and define the grade-mineral domains. Later, they must participate in the metallurgical and hydraulic testing programs, including the evaluation of test results; then, during financial modeling, they must collaborate with all of the other specialists.

Bioleaching of Supergene Porphyry Copper Ores from Sungai Mak Gorontalo of Indonesia by an Iron- and Sulfur-Oxidizing Mixotrophic Bacterium

2017 ◽  
Vol 262 ◽  
pp. 20-23
Author(s):  
Siti Khodijah Chaerun ◽  
Frideni Yushandiana Putri ◽  
Mohammad Zaki Mubarok ◽  
Wahyudin Prawira Minwal ◽  
Zela Tanlega Ichlas
Keyword(s):  
Environmental Concern ◽  
Porphyry Copper ◽  
Environmentally Friendly ◽  
Mineralogical Composition ◽  
Extraction Process ◽  
Appropriate Technology ◽  
Copper Extraction ◽  
Sulfur Oxidizing ◽  
The Impact ◽  
Copper Ores

Environmentally friendly mining technologies have to be developed extensively to avoid the impact of mining activities with respect to environmental concern. One example of such technology is bioleaching which has been developed worldwide and is regarded as an appropriate technology for the extraction of metals from polymetallic ores such as supergene porphyry copper ores, mainly consisting of secondary copper sulfides, including chalcocite (Cu2S), covellite (CuS), or oxide minerals, i.e., cuprite (Cu2O) and tenorite (CuO). The extraction process for this complex ore generally requires high temperature, high pressure and/or high acid concentration. For the economic extraction of valuable copper from such ores, the bioleaching of supergene porphyry copper ore from Sungai Max in Southeast Sulawesi of Indonesia was investigated in shake-flask experiments at room temperature (28 °C) for 14 days using an iron- and sulfur-oxidizing bacterium (Alicyclobacillus sp.) indigenous to an Indonesian mine site. The main mineralogical composition of gangue minerals contained in this ore sample included quartz, muscovite, kaolinite and alunite. The relatively high copper extraction efficiencies were obtained over a 14-day period of the bioleaching experiments as a function of pH, pulp density and NaCl concentration. Therefore, the findings of this study provide the first information of bioleaching process of supergene porphyry copper ores in Indonesia that may highly be useful for developing an economical and environmentally friendly extraction process of such complex ores.

Improving the recovery of low grade coarse composite particles in porphyry copper ores

2011 ◽  
Vol 22 (4) ◽  
pp. 464-470 ◽  
Author(s):  
Saeed Farrokhpay ◽  
Igor Ametov ◽  
Stephen Grano
Keyword(s):  
Porphyry Copper ◽  
Composite Particles ◽  
Low Grade ◽  
Copper Ores

Flotation Responce of the Refractory Yangla Copper Oxide Ores with Hydroxamate Collectors

2013 ◽  
Vol 803 ◽  
pp. 131-136 ◽  
Author(s):  
Fei Xiong ◽  
Yan Jun Li ◽  
Zhong Hui Zhang ◽  
Yao Zhong Lan
Keyword(s):  
Copper Oxide ◽  
Yunnan Province ◽  
Copper Recovery ◽  
Refractory Oxide ◽  
Bench Scale ◽  
Oxide Minerals ◽  
Concentrate Grade ◽  
Copper Ores ◽  
Chelating Reagent

To establish the flotation response and suitability of the collectors, series of bench-scale flotation tests are conducted for the refractory oxide copper ores obtained from Yangla Mine in Yunnan province. A simple xanthate (PAX) is used as the sulphide collector and a chelating reagent of hydroxamate AM28 as the oxide collector. It is found and confirmed by mineralogical examination that AM28 successfully recovered all the discrete copper oxide minerals from the Yangla ore. The flotation tests show that the overall copper recovery is affected due to the minerals copper associated with goethite which is not amenable to flotation. The average copper recovery from the rougher tests is 38.4% with a concentrate grade of 3.19%. The additional cleaning flotation can increase the Cu grade in concentrate further.

scholarly journals Understanding microwave induced sorting of porphyry copper ores

2015 ◽  
Vol 84 ◽  
pp. 77-87 ◽  
Author(s):  
R.S. John ◽  
A.R. Batchelor ◽  
D. Ivanov ◽  
O.B. Udoudo ◽  
D.A. Jones ◽  
...  
Keyword(s):  
Porphyry Copper ◽  
Copper Ores
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