leaching of roasted copper sulfide ore

(PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE |

LEACHING OF A ROASTED COPPER SULFIDE ORE Rosselle Kim P. Castillano, Wilfredo T. Gatdula Jr., Gin Derick L. Magno, Jhunalyn H. Parantar METE 157N: HYDROMETALLURGY LABORTORY ABSTRACT Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition.

Optimization of sulfuric acid leaching of roasted ...

2020-8-26 · Roasting is the key unit operation in converting low solubility sulfide ores into high solubility oxides. During roasting, chalcopyrite reacts with air and decomposes to generate copper sulfate, sulfur dioxide, sulfur, copper-iron oxides, copper-oxy sulfate, and copper ferrite [ 63, 64 ].

Effect of Roasting Temperature for Copper Leaching of ...

2018-12-6 · The roasted cake was leached at the ratio S/L was 1/9, the leaching temperature was 25˚C, the sulfuric acid concentration was 60 g/l, the rotation speed was 450 r/min, and the leaching time was 4 h in all experiments. The effect of roasting temperature and time is shown in Figure 3. At 400˚C, the not high recovery of 66.3% is observed at 2 h.

(PDF) Recovery of Copper from Copper Sulfide

Under the optimum experimental conditions (sulphation roasting at 240 °C for 1 h; 32 ml sulphuric acid/100 g roasted Ni–Mo ore; water leaching for 2 h. at 98 °C with a liquid-to-solid ratio of ...

Leaching of Copper Sulphides - SAIMM

2016-6-8 · When considering the leaching of copper sulphides, it is very important to understand the mineralogy of the ore body because not all leaching options are suitable for all minerals. A very effective way to develop the required understanding of the mineralogy is to do test work on site-specific ores. It is important that this test work is done on representative samples from the ore body. In addition, it is important to understand any variability of different zones of the ore body to the leach

What is the best method for sulfide copper leaching?

One of the important subject in copper sulfide leaching, Ore Characterisation and related method. Bacteria Heap Leaching and Oxidative bacterial heap leaching two methods

Recovery of Copper from Copper Sulfide Concentrate by ...

2015-2-16 · process becomes the most viable and promising approach to treat copper sulfide ore in metallurgy fields. In hy-drometallurgical process, the most widely used pretreatment process is roasting before leaching. There are three common roasting methods: oxidation roasting, chlorination roasting and sulfation roasting. Oxidation roasting needs high roasting temperature and copper will suffer a loss by generating copper ferrite. The exhaust gas (SO2, Cl2, HCl) from the furnace in chlorination roasting process is a threat to the environment. In sulfation roasting, copper was mainly formed to soluble sulfate by water or dilute acid after roasting. Mostly this method is applied to pretreatment of copper concentrate with high percentage of sulfur. A sulfate promoter can change the roasting atmosphere from oxidation to reduction, with releasing

Recovery of Copper from Copper ores by roasting at ...

2021-6-4 · roasting time and temperature increase, the leaching of copper will also increase. The leaching of copper maximum in a sample was in the order of leaching of copper in three ores is as Sample C>sample D>Waziristan chalcopyrite. The experiments showed that the untreated raw oxidized copper ore show significant leaching which is 9.5% for saline ...

Acid leaching of oxide–sulfide copper ore prior the ...

2015-11-26 · Direct leaching process of copper oxides or complex ores attracts considerable scientific and engineering attention, which plays an important role in the sus-tainable development of copper industry. Sulphuric, hydrochloric and nitric acid, as well as the ammonia are usually used as the leaching agents in a various copper ore leaching processes [2–12]. Copper oxides easily react with sulphuric acid solutions at the room tempe-rature producing Cu2+ in the aqueous phase. Energy consumption can also become an important factor of economy when the leaching process occurs, consider-ing the heating and agitation of the input suspension. The kinetics of copper minerals leaching was recently published by several authors, for example Sokić at al. kinetics of copper leaching from chalcopyrite, Bingol and Canbazoglu kinetics of copper leaching from mala-chite [10,11], while Quast has published the kinetics of copper leaching from atacamite. Also some res-earchers studied the processing of copper oxides

Sulphide Leaching - Mineral Processing & Metallurgy

2015-6-24 · Most sulphides are oxidized to sulphate. From the sulphated ore, all of the zinc, copper and iron can be leached with water while lead, silver, gold and antimony will remain in the insoluble residue. Leaching of an Arsenical Copper Sulfide

LEACHING-OF-A-ROASTED-COPPER-SULFIDE-ORE.pdf |

2016-9-28 · LEACHING OF A ROASTED COPPER SULFIDE ORE. Rosselle Kim P. Castillano, Wilfredo T. Gatdula Jr., Gin Derick L. Magno, Jhunalyn H. Parantar METE 157N: HYDROMETALLURGY LABORTORY. ABSTRACT Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition.

Effect of Roasting Temperature for Copper Leaching of ...

This study was undertaken to develop a cost-effective method of copper leaching in sulfide concentrate involving minerals as chalcopyrite and pyrite. The combined methods involving low temperature roasting of sulfide copper minerals with potassium chlorides without the formation of sulfurous gases and their evolution into the atmosphere is suggested.

What is the best method for sulfide copper leaching?

One of the important subject in copper sulfide leaching, Ore Characterisation and related method. Bacteria Heap Leaching and Oxidative bacterial heap leaching two methods that apply for low grade ...

In situ roasting and leaching of sulfide minerals ...

12. The process as claimed in claim 8 comprising leaching copper values from the roasted iron-copper sulfide mineral particles by introducing a mineral acid solution into the fragmented mass of roasted iron-copper sulfide mineral particles. 13.

Leaching of Primary Copper Sulfide Ore in Chloride

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

Sulphide Leaching - Mineral Processing & Metallurgy

2015-6-24 · Copper sulphate can be used to separate Copper from Nickel in a sulphide ore or Copper from Fe in Cu -Fe sulphide ore. CuSO 4 solution can also be used for removing Pb, Zn, and Fe from copper sulphide ores. In presence of oxidizing agents:

Column leaching of low-grade sulfide ore from Zijinshan ...

2015-6-10 · Copper and iron dissolution of Zijinshan low-grade copper sulfide ores was investigated in ore-packed columns. At 60 °C and pH 1.0, 37.1 g Fe(III) L − 1 permitted effective copper dissolution and inhibited the activity of iron-oxidizing microorganisms. At 30 °C, microorganisms stimulated Fe(II) and pyrite oxidation, resulting in 85 and 54% of copper and pyrite extraction yields, respectively.

Leaching of a pyrite-based ore containing copper using ...

2020-6-24 · The oxidation of sulfide-based ores is industrially relevant as it facilitates the extraction of valuable metals and eliminates undesired elements from an ore. Even though oxidation can be done thermally (pyrometallurgy), solution-based (hydrometallurgical) methods are currently sought as they represent a more sustainable option. Here, the leaching of a sulfide ore

Atmospheric pressure leaching application for the

2013-8-20 · Copper tailings samples from Nchanga in the Zambian Copperbelt region and low-grade nickel ore from Waterval Boven in the Mpumalanga Province of South Africa were used in the test work. The samples were supplied by Konkola Copper Mine and Bohlaba Mines Ltd, respectively. Experiments for copper leaching were conducted on raw

Synchronous extraction of nickel and copper from a mixed ...

2018-3-10 · The mineralogical phase identification of the ore samples was carried out using XRD (Rint-2000, Rigaku), and the results in Fig. 1 indicate that the major crystalline minerals in mixed oxide-sulfide nickel ore are pyrite (FeS 2), pyrrhotite (Fe 7 S 8), pentlandite ((Fe,Ni) 9 S 8), chalcopyrite (CuFeS 2) and quartz (SiO 2).It can be confirmed that pentlandite is the dominant nickel bearing ...

"The Recovery of Copper in Sulphide Ores by Roasting ...

Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the sulphide into the oxide form. This can be done by giving the sulphide ore an oxidizing-sulphatizing roast. Copper sulphate is soluble in water, so acid will be saved in the leaching process if ...

Effect of Roasting Temperature for Copper Leaching of ...

This study was undertaken to develop a cost-effective method of copper leaching in sulfide concentrate involving minerals as chalcopyrite and pyrite. The combined methods involving low temperature roasting of sulfide copper minerals with potassium chlorides without the formation of sulfurous gases and their evolution into the atmosphere is suggested.

Treatment of roasted metal sulphide ores and ferrites by ...

15. A process for the treatment of a roasted metal sulphide ore, for the separation of metals therefrom, comprising: (a) leaching said roasted ore with peroxysulphuric acid; and (b) separating a solution containing metals therefrom. 16. The process of claim 15 in which the roasted ore is ore that has been subjected to a dead roast. 17.

Accelerating Copper Leaching from Sulfide Ores in Acid ...

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 ...

EXTRACTION AND ECONOMIC UTILIZATION OF COPPER

2018-7-23 · 2.5.1 Similarities of Hydrometallurgical Leaching Techniques (Copper Sulfide Ores) 47 2.6 Solvent Extraction 48 2.7 Kinetics and Thermodynamics Studies 50 . 18 CHAPTER 3 ... Table 4 Effect of Leaching Time on Leaching of Simple Roasted Ore 75 Table 5 Effect of Sulfuric Acid Concentration on Leaching of Simple

Bio-Heap Leaching of Primary Copper Sulfide Ore by

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 ...

In-place leaching of primary sulfide ores: laboratory ...

2021-8-3 · From AIME solution mining symposinm; Dallas, Texas, USA (Feb 1974). Experimental results obtained in laboratory leaching studies of primary copper sulfide ore in sulfuric acid systems pressurized with oxygen are interpreted by a computerized geometric model

LEACHING OF LOW-GRADE COPPER ORES: A CASE

2017-6-9 · The changes in copper content in the ore with the time of exploitation at the RTB mines [9] Oxide copper ore, mixed oxide-sulphide ores and low-grade copper sulphide ore, which, for economic reasons, cannot be enriched by flotation, may be processed by leaching methods. Agents for leaching copper

A-Z of Copper Ore Leaching - ALTA Metallurgical Services

2021-3-26 · A-Z of Copper Ore Leaching 5 LEACHABILITY OF COPPER MINERALS • Leachability in sulphuric acid solutions varies enormously (see Table 1). Orebodies frequently contain a mix of minerals, commonly varying with depth. • Oxide minerals also are amenable to ammonia/ammonium carbonate leaching –reduction roast needed for silicates.

Sulfide Ore Treatment Gold - Silver - Copper - Cobalt ...

2017-10-20 · A procedure was developed for recovering gold, silver, cobalt, copper, and zinc from a massive sulfide ore by a hydro-metallurgical process. The procedure consists of (1) oxygen pressure leaching; (2) iron, arsenic, and copper removal from the leach

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