Mining and ore processing at Chuquicamata copper mine. The Chuquicamata copper mine currently employs conventional open-pit mining method, with the help of trucks and shovels. The underground mine proposes to use block caving method of mining, through a 1,000m-deep shaft. Ore will be extracted by macro blocks and block caving in four production ...

Rapid Mathematical Method for the Prediction of Raffinate Copper Concentration. ... Mass Balance Process Flowsheet, and Equipment Design ... Table I and fig I give such a balance for the Chuquicamata commercial plant for reference only. The format of the calculation will obviously depend upon the type of system used.

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A hydrometallurgical process for recovering copper from copper bearing ores or fractions, by a process of first wetting and sulfatizing the ore with controlled amounts of H 2 SO 4 and water, followed by acid curing and repulping to sulfatize a substantial portion of the copper in the ore. Also, the fine and coarse fractions can be classified, followed by pile leaching the coarse fraction ...

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Example of Open Pit Mining Method 2 February 2016 Prof. Dr. H.Z. Harraz Presentation Mining Methods, Surface mining 87. Open-pit mine: Chuquicamata copper mine, Región de Antofagasta, Chile Locality: Región de Antofagasta, Chile. Pit dimensions: 4.3 km long x 3 …

Chuquicamata Subterránea will transform the century-old Chuquicamata open-pit mine, the largest in the world, into a modern large-scale underground operation using the block caving method of exploitation, extending the life of the division by at least 40 years. The ore will be extraced through an extensive "block caving" operation, by ...

In 2019, the Chuquicamata mine – one of the largest copper mines in the world – was converted from an open-pit mine to an underground operation. In 2015, TAKRAF was contracted to supply the principal ore transportation system moving crushed copper ore from underground storage bins to the surface processing site.

The method of claim 10 wherein said polyethylene glycol monoleate has a molecular weight of from about 200 to 2000. 13. The method of claim 5 wherein said oil solvent is a paraffinic oil solvent. 14. The method of claim 5 wherein said oil solvent is a naphthenic oil solvent. 15. The method of claim 5 wherein said oil solvent is an aromatic oil ...

Figure 1 Chuquicamata underground mine original configuration Aiming to allow operational and planning independence to the mining areas, and therefore maximising production reliability, the cave mining method decided upon was block caving using macro blocks (Fuentes & Villegas 2014).

The first process, vat leaching of high-grade copper oxide ore followed by EW of copper from the leach solution, produced low quality copper cathode at relatively high cost. In 1968 the tonnage of high-grade oxide ores was decreasing and vat leaching was on the decline. The second process…

BHP Billiton and Codelco, in a joint venture, Alliance Copper Ltd., are constructing a demonstration plant at Chuquicamata, in northern Chile, that will produce 20,000 tons of cathodes a year starting in 2003 using Billiton's patented BioCOP™ process.

The direct method of presenting the statement of cash flows presents the specific cash flows associated with items that affect cash flow. Items that typically do so include: The advantage of the direct method over the indirect method is that it reveals operating cash receipts and payments. The standard-setting bodies encourage the use of the ...

Codelco (Corporación Nacional del Cobre de Chile or, in English, the National Copper Corporation of Chile) is a Chilean state owned copper mining company. It was formed in 1976 from foreign-owned copper companies that were nationalised in 1971.. The headquarters are in Santiago and the seven-man board of directors is appointed by the President of the Republic.

With a history of more than 100 years, Chuquicamata has become one of the largest open pits in the world. Its current depth of 1100 m, length of 4500 m and width of 3000 m, resulting in haulage distances of over 11,000 m from pit bottom to the processing plant or waste dumps, with waste/ore ratio greater than 4 and much lower grades, are effectively determining its profitable limit by …

Producing the sought after high-grade metal uses pollution-intensive methods, so higher demand for fine copper from China is also increasing the pressure on Chile's environment. After extracting copper rocks from Chuquicamata, the smelting process uses temperatures of 200 degrees Celsius to separate copper from the sulphide and oxides it ...

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internal mechanics of the caving process works, thereby removing a lot of the uncertainty previously associated with these mining methods. As caving has proven to be a safe and effective mining method, its popularity has increased around the world." BLOCK ANd pANeL CAVING Block caving is an underground mining method that uses gravity to exploit

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The Chuquicamata deposit in northern Chile (Fig. 1) is the world's greatest copper orebody and has been mined since 1915 in one of the world's largest open-pit mines (Ossandón and others, 2001).Porphyry intrusions and related alteration and mineralization occurred between ∼36 and 31 Ma, as well as post-mineral brecciation and strike-slip fault offset, and all were controlled by the ...

In the result list, click Create Mosaic Dataset to open it. You'll create the mosaic dataset in the project geodatabase. On the Create Mosaic Dataset dialog box, under Parameters, for the Output Location, click Browse, click Project, click Databases, and select Chuquicamata mine.gdb. Click OK.

The method is an attractive alternative when planning to develop a new mine, or to extend the life of an open pit operation. More and more mining companies are exploring block caving as it becomes increasingly difficult to find high quality orebodies close to the earth's surface.

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Both methods have ad- instrumentation, described in an earlier paper (Charbu- vantages and disadvantages and in many cases provide cinski et al., 2003), were recently tested in a number of a complementary information in a particular application. large diameter blast holes at CODELCO's Chuquica- One important issue to consider is the direct ...

lorca, tomas s., studies of the solvent extraction process and its use in codelco chile, chuquicamata division, 1987, p.311-322. Deposit WORLD MINING EQUIPMENT, 5/87, P.20-24.

Codelco es una empresa dedicada a la exploración, desarrollo y explotación de recursos mineros de cobre y subproductos, su procesamiento y su comercialización.

Block (gravity) caving is a bulk underground mining method, which allows large low-grade deposits to be mined underground. This method involves undermining the orebody to make it collapse under its own weight into a series of chambers from which the ore extracted. It is a useful technique to extend the life of large deposits previously mined by ...

lem, and develop a method of obtaining a good solu tion. The problem is characterized by many possible combinatorial solutions, nonlinear factors intrinsic to the metallurgical processes, and accumulated experi ence on the part of decision makers. The Problem The Chuquicamata mine's smelting process involves

Chuquicamata Division Mining method | Open pit mine Operation | Since 1915 Location | Calama, Antofagasta Region Products | Electro-won and electro-refined cathodes and copper concentrate Production | 302,010 metric tones of fine copper Own workforce | 5,921 people as of December 31, 2016

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Mansa Mina orebody is a porphyry copper orebody, satellite of Chuquicamata copper mine, where the erosion and weathering have not yet masked or removed too much of the lithological units describing the copper enrichment process. This enrichment process, due to fluids guided by the fracturation network leads to a ...

Answer: > Copper extraction refers to the methods used to obtain copper from its ores. The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other facto...

It is a method that could be used to study the process of comminution and has been successfully applied to comminution in grinding machines (National Materials Advisory Broad 1981). This methodology is based in a mass balance of fragments, considering concept as rate of breakage, size distribution, residence time distribution, and a ...