Background

dump leaching maintains

Arizona's Mining Update - 1997 - AZGS Document Repository

tailings leach operations. The Pinto Valley mine consists of an open-pit mine, a 63,000-ton-per-day concentrator, dump leach, and 8,000 ton- per-year SX-EW plant. Miami's leach operations recover copper from in-situ leaching of the old Miami mine block cave area and by hydraulic mining and leaching of the Miami No. 2 Tailings pile.

HEAP LEACHING Experience-based approach to successful …

to as a dump leach, or as a crushed ore in a heap leach. The reagents used and the chemistry of leaching are metal specific, but the basic principles are similar to all ore types. At first glance, heap leaching can appear to be an extremely simple technology; however, without the proper characterisation, engineering and design, a heap leach

US4120935A - Dump leaching of copper - Google Patents

The improvement in the method of recovering copper from low grade ore containing oxidized copper ore which comprises establishing a dump of such ore in fragmented form, substantially completely wetting the ore in the dump with strong aqueous sulfuric acid containing at least about 100 g/l H 2 SO 4, allowing the acid wetted ore to age for a period of at least about three days, thereafter ...

Gold Ore Processing Dump Leach - caesarmachinery.com

gold heap leach processing plant Solution for ore mining XSM. gold ore processing dump leach. Gold extraction - Wikipedia, the free encyclopedia Once the ore is mined it can be treated as a whole ore using a dump leaching or ...

Lixiviación por vertederos - Dump leaching - abcdef.wiki

This page is based on the copyrighted Wikipedia article "Dump_leaching" (); it is used under the Creative Commons Attribution-ShareAlike 3.0 Unported License.You may redistribute it, verbatim or modified, providing that you comply with the terms of the CC-BY-SA.

Methodology for a dump design optimization in large …

Maintaining the stability of the dump may require relocation of weathered rock or material blending, especially if water is present (Russell, 2008). • If it is a dump leach, a leaching cycle time will define the mining delivery rate and dumping schedule. Ideally, deliveries rate from the mine should match the leaching cycle times of the dump.

A model of the dump leaching process that incorporates ...

A one dimensional, nonsteady-state model of the copper waste dump leaching process has been developed which incorporates both chemistry and physics. The model is based upon three equations relating oxygen balance, heat balance, and air convection. It assumes that the dump is composed of an aggregate of rock particles containing nonsulfide copper minerals and the sulfides, chalcopyrite and ...

A model of the dump leaching process that incorporates ...

leaching of copper from a small test dump, and excellent agreement with field measure- ments was obtained. The model predicts that the most important variables affecting cop- per recovery from the test dump are dump height, pyrite concentration, copper grade, and lixiviant application rate.

(PDF) Bioleaching: A microbial process of metal recovery ...

6, 14 The modern era of biomining started with leaching of copper run-of-mine waste rocks (Dump leaching) in USA during mid-1960s. 14 In-situ bioleaching of uranium from extract residual uranium ...

Alumina Recovery From Copper Dump Leaching Liquors …

covering aluminum from copper dump leaching liquors. These solutions contain up to 15 giL Al and represent more than 2,000 stld A~03 (alumina). Earlier efforts to recover the aluminum evaluated solvent extraction (1)3 and ion-exchange methods (2). Solvent extraction successfully recovered an aluminum product, but the need to maintain

US3260593A - Process for leaching copper from lowgrade ...

US3260593A US223206A US22320662A US3260593A US 3260593 A US3260593 A US 3260593A US 223206 A US223206 A US 223206A US 22320662 A US22320662 A US 22320662A US 3260593 A US3260593 A US 3260593A Authority US United States Prior art keywords copper solution leach solution dump leaching Prior art date Legal status (The legal status is an assumption …

Application of bioleaching to copper mining in Chile

As a result, dump leaching operation can take 4 or more years, heap leaching operation times are in the range of 5 to 10 months and less than a month is required for stirred tank reactor (Domic-Mihovilovic, 2001; Bustos, 2005). Of course, operation time is not only determined by particle size but also by different factors related to the ...

Dump leaching - Wikipedia

Dump leaching is an industrial process to extract precious metals and copper from ores.. Dump leaching is similar to heap leaching, however in the case of dump leaching ore is taken directly from the mine and stacked on the leach pad without crushing where, in the case of gold and silver, the dump is irrigated with a dilute cyanide solution that percolates through the ore to dissolve gold and ...

A mathematical model of the chemistry of the dump leaching ...

A. DUEÇ) Leaching Operations Dump leaching operations have been discussed in detail in the publications by Woodcock (51) and by Sheffer and Evans (43); the following sunmary of information is drawn from these sources. Tlie copper sulfide minerals important in dump leaching are chalcopyrite, chalcocite and, to a lesser extent, covellite and bomite.

Leaching: Fundamentals and Industrial Practice

Heap/Dump Leaching Laterite Leaching for Ni and Co Extraction Copper Concentrate Leaching ... (including registration fees, travel, meals, and lodging) undertaken to maintain and improve professional skills. For more information concerning applicability, contact your local Internal Revenue Service office.

LixTra - BASF

Heap and Dump leaching are processes used to extract metals such as copper, gold, nickel and uranium from their ores by placing the ore on a pad in the form of a heap. A heap leach encompasses a level of comminution while a dump leach is run of mine (ROM), where the ore is moved directly from mining to lixiviation.

Dump leaching - BioMineWiki

Dump leaching is one of several leaching methods. Dump leaching is carried out on rejected off-grade material that during normal mining has been put aside in big dumps at the mine site. The particle size of the material is generally big and the ore is processed for many years by …

Ecological_aspects_of_copper_recovery_via_dump_leaching

1. Introduction Copper dump leaching is an industrial process to extract copper from ores.It is similar to heap leaching, however in the case of dump leaching ore is taken directly from the mine and stacked without crushing where, the dump is irrigated with a dilute sulfuric acid solution that percolates through the ore to dissolve copper.

(PDF) In-situ and dump leaching technology: Application to ...

Habashi proposed in situ, dump or vat leaching of phosphate rocks with dilute HNO 3 (20%) or HCl (10%) to get a solution of monocalcium phosphate, and to allow recovering uranium and rare earths ...

Copper Dump Leaching and Management Practices That ...

Introduction Dump leaching refers to percolation leaching of copper from run-of-mine low-grade ores that have been piled on native ground. These dumps typically cover hundreds of acres and contain millions of tons of low-grade ore. The leaching cycle covers a span of many years. The percentage of copper produced by leaching operations has ...

Law section - leginfo.legislature.ca.gov

Aboveground Storage of Petroleum [25270 - 25270.13] ( Chapter 6.67 added by Stats. 1989, Ch. 1383, Sec. 1. ) 25270.2. For purposes of this chapter, the following definitions apply: (a) "Aboveground storage tank" or "storage tank" means a tank or container that has the capacity to store 55 gallons or more of petroleum that is ...

Precious Metal Heap Leach Design and Practice

employed: dump leaching and vat leaching (vat leaching is the treatment of sand or crushed ore in bedded vats with rapid solution percolation). Typically, heap leaching is chosen for basic financial reasons - for a given situation, it ... maintain control of a heap leach with an implied promise of a future larger capital investment. The

(PDF) Industrial copper dump leaching operation at Vlaikov ...

The present paper discusses the results obtained during, the 18-year period of the industrial copper dump) leaching operation. The flowsheet is presented and each separate component of the complex ...

Dump leaching is an industrial process to extract precious m

ⓘ Dump leaching. Dump leaching is an industrial process to extract precious metals and copper from ores. Dump leaching is similar to heap leaching, however in the case of dump leaching ore is taken directly from the mine and stacked on the leach pad without crushing where, in the case of gold and silver, the dump is irrigated with a dilute cyanide solution that percolates through the ore to ...

Ground Water Contamination G - EPA

maintain ground water quality. Generally, the greater the distance between a source of contamination and a ground water source, the more likely that natural processes will ... Once in the landfill, chemicals can leach into the ground water by means of precipitation and sur-face runoff. New landfills are required to have clay or synthetic liners ...

Bioleaching: metal solubilization by microorganisms | FEMS ...

5.2.1 Dump leaching. Dump leaching is the oldest process. The size of the dumps varies considerably and the amount of ore may be in the range of several hundred thousand tons of ore. The top of the dump is sprinkled continuously or flooded temporarily .

Waste Mismanagement in Developing Countries: A Review of ...

The dump of hazardous and non-hazardous wastes poses serious public health and environmental issues, since rainwater leach from the waste to the groundwater contaminating the surrounding areas . Same issues regard the agriculture industries, with the production of waste related to pesticide containers and spry solutions.

Bioleaching model of a copper-sulfide ore bed in heap and ...

A two-dimensional (2-D) model for a heap or dump bioleaching of a copper ore containing mainly chalcocite and pyrite has been developed. The rate of the mineral sulfide dissolution was related to the rate of oxidation by bacteria attached onto the ore surface. The latter was calculated using the model of Michaelis-Menten, where both temperature and dissolved oxygen in the leach solution were ...

Copper Dump Leaching and Management Practices That ...

The dump is also compressed by the added weight of the solutions and the destruction of the competency of the bridging rocks by chemical reactions that decrepitate the rock.17 Characteristics of the Leach Solution The leach solution for dump leaching of low-grade copper ores typically consists of the barren solution from the precipitation or ...

U.S. Geological Survey Field Leach Test for Assessing ...

Leachate pH data for eight mine dump composite samples using the 18-hour U.S. Environmental Protection Agency Method 1312, Synthetic Precipitation Leaching ... leaching by water, and to understand potential impacts of these interactions on the surrounding environment. Introduction Water-induced leaching of major elements, trace metals,