Solid State Extraction of Nickel from Nickel Sulfide Concentrates
While Pn itself contains ∼36 wt% Ni, the average Ni grade of the sulfide ore is in the range of 1.3–2.8 wt% [9, 10]. In order to achieve greater throughput and reduce energy consumption, Ni losses, and SO 2 emissions, the sulfide ores are usually beneficiated to yield an upgraded Ni sulfide concentrate with 12–20 wt% Ni [[11], [12], [13]].
Crushed ore agglomeration and its control for heap …
Based on the extensive experience of heap leaching operations, crushed ore agglomeration can be successfully considered and utilized as a pretreatment step for …
Crushed ore agglomeration and its control for heap leach …
To overcome percolation problems, a major improvement was made with the introduction of agglomeration prior to ore placement. If the ore particles and/or agglomerates are of similar size, segregation can be avoided to a great extent (Heinen, 1980, Herkenhoff and Dean, 1987, Kinard and Schweizer, 1987, McClelland et al., …
Ore agglomeration behavior and its key controlling …
Specifically, this paper basically discusses three pivotal questions tightly related to the industrial requirements: 1) the process of efficiently obtaining the well-shaped, leachable ore agglomerations via key factors and parameters; 2) the …
Oxidation Activity Evaluation of Sulfide Ores Based on
Spontaneous combustion of sulfide ores is a conversion of the chemical energy to heat owing to oxidation [1, 2].When sulfide ores are exposed to air, the exothermic reactions between ore particles and oxygen will occur [3, 4].If the reaction heat is entirely dissipated by external conditions, only low temperature oxidation will take place.
Agglomeration experiment of secondary copper sulfide ore
The presence of a large amount of fine particles and muddy ore during the heap leaching process leads the occurrence of low leaching rate. Herein, agglomeration experiments using low-grade secondary copper sulfide ore were conducted to enhance the poor heap permeability and low leaching rate caused by the presence of a large amount of fine …
Copper sulfides agglomeration using a novel lab-scale …
The chemical composition is quantified by atomic absorption spectroscopy, the results showed that 1.67 % Fe, 1.10 % S, 0.30 % CaO, 0.04 % MgO, 5.29 % Al 2 O 3 and 91.00 % SiO 2.The detailed minerology could be checked in the former studies [3].These feed ores are crushed through the jaw crusher and roll crusher, and then the ore is screened by …
Agglomeration of Iron Ores | SpringerLink
Agglomeration of iron ores is the iron ore pretreatment process in which the powdery iron ore that cannot be directly fed into a blast furnace experiences high-temperature solidification by sintering process and pelletizing process or low-temperature solidification by pelletizing process and briquetting process to generate the rich ore …
Agglomeration Scale: A Method to Improve Leaching …
Agglomeration as a unit process not only allows better conditioning of the hydrodynamic behavior of the ore but also creates an opportunity for optimized delivery …
Agglomeration Scale: A Method to Improve Leaching …
Ore agglomeration has been used as part of the heap leaching process for the last 40 years. However, industrial experience shows that the lack of a universal agglomeration standard has limited the benefits of this, otherwise, valuable unit process. The more complex the ore, in terms of the nature and relative abundance of fines (<74 …
Effects of forced aeration on community dynamics of free …
Bacterial community dynamics and copper leaching with applied forced aeration were investigated during low-grade copper sulphide bioleaching to obtain better bioleaching efficiency. Results illustrated that appropriate aeration improved bacterial concentrations and leaching efficiencies. The highest bacterial concentration and Cu2+ …
The Effects of Sulphuric Acid and Sodium Chloride Agglomeration …
In this study, the effects of sulphuric acid and sodium chloride agglomeration and curing on chalcopyrite leaching were evaluated at various temperatures: 25, 50, 70, and 90 °C. ... Melo, E.; Keith, B. Effect of curing time on the dissolution of a secondary copper sulphide ore using alternative water resources. In …
Leaching of chalcopyrite ore agglomerated with high …
Mineralogical analysis of the ore sample was performed using Quantitative Evaluation of Minerals by Scanning Electron Microscopy (QEMSCAN). The copper-bearing sulfide minerals in the ore consist mainly of chalcopyrite (CuFeS 2), followed by minor chalcocite (Cu 2 S), covellite (CuS), bornite (Cu 5 FeS 4) and traces of other copper …
Accelerating Copper Leaching from Sulfide Ores in …
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.
Study of the leaching and pore evolution in large particles of …
Acid leaching and dissolution of major sulphide ore minerals: processes and galvanic effects in complex systems. Abstract The kinetics and mechanisms of dissolution of the major base metal sulphide minerals, pyrite, chalcopyrite, galena and sphalerite in acidic (chloride) media have been investigated. Minerals….
THE BENEFICIATION OF GOLD ORE BY OIL-PHASE AGGLOMERATION…
Batch and continuous oil-phase agglomeration techniques have been successfully applied to the beneficiation of a low-grade gold-bearing sulphide ore. Grades of 9-10 ozton were obtained at the natural pH of the ore, representing at least a 50-fold improvement. Recoveries of up to 95 per cent were realized, with the gold content in tailings reduced to …
Accelerating Copper Leaching from Sulfide Ores in Acid …
Article. Accelerating Copper Leaching from Sulfide Ores in Acid-Nitrate-Chloride Media Using Agglomeration and Curing as Pretreatment. Pía C. Hernández 1,*, Junior …
Agglomerating Gold Ores
Due to its clayey nature and excessive fines in the oxide ore, agglomeration using Portland cement is required prior to leaching. The ore ranges in screen size from two inches to -200 mesh. ... and topaz (Spence and others). The gold bearing zones vary from massive pyrite sulfide lenses to highly siliceous lenses or streaks with more or less ...
(PDF) Accelerating Copper Leaching from Sulfide Ores in …
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. ... (1 M), and an 80% extraction was obtained with seven days of leaching at 45 C. Ore agglomeration and curing are carried out prior to leaching in heaps [43 ...
Agglomeration and leaching behaviors of copper oxides …
The chemical binder is one of the critical factors affecting ore agglomeration behavior and leaching efficiency. In this study, we investigated the effect of the type of binder and mass fraction of the H 2 SO 4 solution used on the curing, soaking, and leaching behavior of agglomerations. The results revealed that Portland cement (3CaO·SiO 2, …
Agglomeration and column leaching behaviour of nickel …
Request PDF | Agglomeration and column leaching behaviour of nickel laterite ores: Effect of ore mineralogy and particle size distribution | Nickel (Ni) laterites account for about 60-70% of the ...
AGGLOMERATION AND LEACHING OF A …
A crushed, secondary sulfide copper ore was provided by a large mining company. The agglomeration of the ore was studied in three phases. In phase one, a series of scoping …
Agglomeration and leaching behaviors of copper …
7 Citations. Explore all metrics. Abstract. The chemical binder is one of the critical factors affecting ore agglomeration behavior and leaching efficiency. In this …
Metals | Free Full-Text | Pretreatment of Copper …
Some mining plants have used these acid–chloride solutions to treat sulphide ores, using the heap leaching technique with some modifications. The main …
Solved Cite examples of how copper deposits occur. Choose
Cite examples of how copper deposits occur. Choose one or more: A. as an agglomeration metal. B. in sulfide ore minerals. C. in carbonate ore minerals. D. as a native metal. Here's the best way to solve it. Share Share. Occurrence of copper deposits- A. Cu as an agglomeration: Copper agglomeration can occur when the nanoparticles of copper is ...
Shake flask and column bioleaching of a pyritic porphyry …
About 80% of the total Cu in the ore was present as sulphide minerals and the remainder as acid soluble Cu (Table 1). Chalcocite and pyrite represented the main Cu and Fe sulphide minerals in the ore. The results of agglomeration tests showed that stable agglomerates could be obtained by using polyacrylamide and H 2 SO 4 as binders.
Pretreatment of Copper Sulphide Ores Prior to Heap …
solutions to treat sulphide ores, using the heap leaching technique with some modifications. The main improvements were to agglomerate the sulphide ore with …
Cite examples of how copper deposits occur. Choose one or …
1,359 solutions. Find step-by-step Earth science solutions and your answer to the following textbook question: Cite examples of how copper deposits occur. Choose one or more: A. in carbonate ore minerals B. in sulfide ore minerals C. as an agglomeration metal D. as a …
A fresh approach to sulfide ores
A smelting workaround. The traditional route for extracting copper from sulfide ores is smelting. Yet there is a growing case for leaching sulfides from lower grade ore bodies and especially for those ore bodies containing problematic elements like arsenic, which make smelting less economical. Smelting is increasingly expensive …
Hydrometallurgical Processing of Low-Grade …
The authors describe the opportunities of low-grade sulfide ores and mine waste processing with heap and bacterial leaching methods. By the example of gold and silver ores, we analyzed specific issues and …
