Percolation Leaching Of Copper Ore

Heap leaching accounts for approximately 17% of global gold and 21% of global copper production, respectively (Marsden and Botz, 2017; Basov, 2015).It is the only economic technology available to extract value metals from low-grade ores; however, the slow rate of recovery is a major drawback, and in most cases is related to heap permeability (Petersen, …

Another 1 kg of the ore sample was ground down using a series of roller mills and then pulverised to dimensions of less than 10 μm for chemical and mineralogical analyses. 2.4. Percolation column leaching Percolation column leaching tests were conducted in two types of columns: small laboratory column and large semi-pilot column.

Heap leaching of copper oxide ores usually incorporates the use of sulphuric acid (H 2 SO 4) and water to bind fines to larger ore particles during the agglomeration process. In addition, the …

Abstract. The general feasibility of ammoniacal percolation leaching of copper sulphide ores has been demonstrated. The rates are comparable to those of conventional ferric sulphate-sulphuric acid systems, but without the attendant problems of carbonate or iron dissolution, For the ore column heights studied, the copper leaching rate increased …

Percolation Leaching of a Chalcopyrite­ ... occur in the ore bed. The leaching rate of copper in this study was found to be low at ambient temperature and even lower at elevated temperatures. These facts are supported by other studies (L, l~). It was decided to use the new technology ...

As compared to non-agglomerated ore, the agglomerated ore aids percolation by preventing the segregation and migration of fines by creating void spaces accessible to leach …

and copper ores, whereas heap leaching has been applied to many different minerals including copper, gold, silver, ura-nium, vanadium, zinc, nickel, and cobalt. However, as the ... Percolation Theory Leach solutions passing through a heap (and all flow regimes where unsaturated flow conditions exist) can be divided into

AbstractThe general feasibility of ammoniacal percolation leaching of copper sulphide ores has been demonstrated. The rates are comparable to those of conventional ferric sulphate-sulphuric acid systems, but without the attendant problems of carbonate or iron dissolution, For the ore column heights studied, the copper leaching rate increased approximately as the square root …

applied the mixed kinetics model to the leaching, by percolation method, of low-grade chalcocite-covellite ore using sulfuric acid as lixiviant.Few studies have been done on the leachability of …

In this study, natural microbial consortia in ore samples collected from all over the Sarcheshmeh copper mine area were enriched to study chalcopyrite bioleaching in shake flask and column percolation experiments for which the fine-grained ore was agglomerated as a simulation of heap bioleaching.

The largest copper heap leaching facility is the Zijinshan copper mine, which is a copper bio-leaching system and it has a daily ore treatment capacity of 20,000 tonnes. 13.9 million tonnes of low grade secondary copper sulphide ores (0.38% Cu) have been treated from 2006 to 2009 and the bio-heap leaching based copper cathode production at ...

Figs. 3 a and b show the variation in percentage of copper recovery with time during percolation column leaching (1st stage leaching) of both the samples in sulphuric acid solution and bioleaching of the 1st stage leach residue, respectively.

This paper summarizes the results of an experimental and economic study undertaken to evaluate the feasibility of treating an oxidized orebody of about 10 million tons, grading about 0.75 per …

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 H2SO4 solution used on the curing, soaking, and leaching behavior of agglomerations. The results revealed that Portland cement (3CaO·SiO2, 2CaO·SiO2, and …

Percolation leaching is the selective removal of metal values from a mineral by allowing a suitable solvent or leaching agent to permeate into and through a mass or pile of material comprising the ...

The results of the percolation leaching experiments showed that the most rapid increase in copper recovery occurred in the first ten days for the Sayak and Bayskoye ore samples. At the same time, a significant amount of sulfuric …

Analogous to Ghorbani et al. (2013), copper leaching kinetics is described by: (9) X ̇ Cu (t) = k C acid 1-X Cu (t) α φ where X Cu is the extent of extraction as a mass fraction of the total copper content, α is the mass fraction of copper that is extractable at particle scale under the leaching conditions (i.e. being exposed to leach ...

In this study, the effect of sodium sulphite (Na2SO3) as a reducing agent in the ore agglomeration step was investigated on the rate of leaching of cobalt from heterogenite in 1 m (tall) leach …

Copper Oxide Ore Heap Leaching Testwork & Scale-Up 3. Notes: 1. Sample quantities below for mini-column and percolation tests are based on 1.6 crushed ore bulk ... It is envisaged that the 1 m high columns to be used for the subsequent mini-column leach tests will be used for the percolation tests. However, a 75 mm diameter column could be used ...

Vat Leaching Copper Ore. ... Ores may be separated into sand and slime, and the sand leached by upward or downward as well as upward and downward percolation of cyanide solutions. Leaching practice has decreased in recent years with the development of closed-circuit grinding and now is seldom incorporated in new plants.

For proper heap design for cyanide leaching of copper-bearing gold ores, it is necessary to run long term column tests (60 to 180 days) at two or three different cyanide and/or pH levels. The relationships between gold-silver-copper recoveries, cyanide levels, and leach times will be different for each ore body. Since gold-copper types of ore ...

• A lower leaching of copper: 80 % after 3 hours; • A very low leaching of cobalt: I 0-13 Ofr,; • Acid consumption depends on the leaching duration. 2.2 Percolation Leaching Tests Percolation tests were carried out in laboratory colunms. Different parti ele sizes were tested : mi nus I Omm, mi nus 15mm and minus 20mm.

A characteristic feature of serpentine oxidized nickel ores (ONO) of the Serov deposit (≈ 1 wt.% Ni) is the increased content of iron and magnesium. The main nickel-containing phases are lizardite, antigorite, clinochlore and iron oxides with the nickel content varying from 1.6 to 9.2 wt.%.Heap (percolation) leaching with aqueous H2SO4 solutions was used for …

This paper summarizes the results of an experimental and economic study undertaken to evaluate the feasibility of treating an oxidized orebody of about 10 million tons, grading about 0.75 per cent copper, by agitation leaching and by percolation leaching.

The current state and future directions of percolation leaching in the Chinese mining industry: challenges and opportunities. Miner. Eng., 125 ... Evaluation of stucco binder for agglomeration in the heap leaching of copper ore. Miner. Eng., 24 (2011), pp. 886-893, 10.1016/j.mineng.2011.03.024. View PDF View article View in Scopus Google Scholar.

the acid generated in EW is recycled back to the percolation leach via SX. Figure 3 The Process Cycles Common to all Forms of Percolation Leaching 1.3. Nomenclature Percolation leaching and in particular, heap leaching has a range of unique names and acronyms describing the various aspect of the technology.

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 ...

) as a reducing agent in the ore agglomeration step was investigated on the rate of leaching of cobalt from heterogenite in 1 m (tall) leach columns. An ore sample that originated from the DRC was used for the testwork. The sample contained 0.29% cobalt, 3.6% copper, 3.53% iron and 6.81% carbonate. The sample was crushed to

2.4. Percolation column leaching Percolation column leaching tests were conducted in two types of columns: small laboratory column and large semi-pilot column. The small column was made of polyvinyl chloride material with a height of 1.2 m and an internal diameter of 9.5 cm. Its loading capacity was 5 kg of ore sample.

Leaching of copper from a Jordanian copper ore has been studied using a stirred batch reactor with hydrochloric acid as the main lixiviant, under the following conditions: temperature 25 – 45 oC ...