a) Dump Leaching In most applications, dump leaching is a convenience for open pit mining operations to dispose of lower grade or waste rock (typically below 0.2% Cu) (4) and stripped material with the intention of recovering the valuable metals contained therein (Figure 1). Dump design is dictated by topography and haulage costs.

dump copper acid days Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. ... Generally, dump leaching is performed with minimal solution control and recoveries do not exceed 40 to 60% of the copper present in the ore after periods up to five years of leaching. Recoveries are even poorer when ...

Dump leaching is a method that utilizes chemical or bacterial leaching to process noncommercial and low-grade commercial coarse ore stockpiles, the extraction …

Dump and heap leaching (via irrigation and percolation of acid onto and through the material) is often the selected process option for many marginal low-grade orebodies typically for Cu, Uranium and Ni ores. This process typically presents much lower capital and operating costs, albeit at lower metal recoveries.

Engineering, Environmental Science. 1993. Keywords: Mecanique des sols ; Sols non satures Reference Record created on, modified on . 3,430. PDF. Semantic Scholar extracted view of "Study on preferential flow in dump leaching of low-grade ores" by A. Wu et al.

Definition of dump leaching. Term applied to dissolving and recovering minerals from subore-grade materials from a mine dump. The dump is irrigated with water, sometimes acidified, which percolates into and through the dump, and runoff from the bottom of the dump is collected and mineral in solution is recovered by a chemical reaction. …

Abstract. Based on the law of temperature changes in the leaching dump and the forming process of heat flux, the basic balance equation of heat flow in dump was established, the dissipated heat flow from dump to the atmosphere was analyed to estimate the surface temperature of the ore particle in dump and discover the law of forced heat ...

The dump leaching of low-grade copper ores, as an integral part of the open-pit mining operations in the Southwest, has been practiced for the last fifty years and is …

dump leaching Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number CN201410246647.2A Other languages Chinese (zh) Other versions CN104032138A (en …

Dump leaching began at Teller in late-1988 at a rate of 4 MTPA and has been progressively expanded to the present rate of 10 MTPA. Teller's on-going commitment to dump leaching is driven by the amenability of gold ores to the process and the availability of large tonnages of low grade gold ore. The sequence of evaluating ores for dump …

In copper dump leaching, run-of-mine ore is irrigated with acidic leaching solution to generate aqueous cupric ions for further processing. The very large size of the ore particles being leached, as much as two meters in diameter, should preclude any significant metal recovery. Dump leaching should not work; and yet it does. This study investigated the …

Scheffel, R.D. Heap Leaching Design for Success-a Case Study. In Proceedings of the Low-Grade Uranium Dump and Heap Leach Technical Meeting, Vienna, Austria, 29–31 March 2010. Petersen, J. Heap leaching as a key technology for recovery of values from low-grade ores—A brief overview. Hydrometallurgy 2016, 165, 206–212.

The technology selected is the dump leaching of copper and other metal values from low-grade copper ores. The portion of the presently used process to be placed in this case is the solvent extraction (SX) train in which the copper in solution is separated from the leach liquor from dump leaching. ... Publication Date: Wed Feb 01 00:00:00 EST ...

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 …

Property Value; dbo:abstract 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 …

Heap leaching copper from oxide and secondary sulfide ores has been practiced commercially since the late 1960's. This methodology is mostly used for low-grade ores and involves the following basic processing steps: Mining, Crushing, Leaching, Solvent Extraction (SX) and Electrowinning (EW). Depending on ore characteristics other …

Using dump leaching as an example, we analyzed the aerial images of a dump leach pad acquired by a camera installed on a drone while the leach pad was under construction. The image analysis results showed that the dump leach pad contained an extremely wide range of particle sizes. A spatial segregation of fine and coarse particles …

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 …

The copper heap leaching, solvent extraction, and electrowinning process has revolutionized the copper industry and significantly reduced the capital and operating costs for the production of copper from low-grade ores.A schematic of a typical heap leach/SX/EW operation is shown in Fig. 4.29.The SX part of the flowsheet recovers …

LixTRA™ is a surfactant that boosts copper heap and dump leach performance by increasing metal recovery and reducing mining costs in an environmentally sound and sustainable manner. It is a liquid, which is added in small (ppm) quantities to the irrigation system of the leaching process. It is a non-hazardous, low ing, non-ionic oligomer.

This report presents a description of the magnitude and distribution of copper dump leaching, the design and operation of Teaching facilities, the potential for environmental …

The ore piles in the proximity of the Vlaikov Vrah mine, Bulgaria, contain about thirty million tns of waste low-grade copper sulphide and mixed ores. In 1972 industry began using these ores for ...

Dump leaching. Heap and in-situ leaching characteristics are combined in dump leaching. Depending on the dump location, an impermeable layer may or may not be employed in a dump leach. The ore is dumped to allow similar processing to heap leaching, but the geological conditions of the area allow a valley or pit to act as the …

Abstract. Preferential flow in dump leaching of low-grade ores was investigated in this paper. The production of the dump leaching plant at Dexing Copper Mining in China was significantly influenced by preferential flow due to the heterogeneity of the ores in dump. Surface tension, negative pore water pressure, matrix suction and …

In this case, the dump leaching technology may be used; i.e., a terrain is prepared on which the crushed ore is piled and the leaching acid is introduced at the top of the pile and collected at the bottom-a system that is also extensively used for gold, copper, and uranium ores (Habashi, 1969). In the present work, experiments were conducted to ...

Dump and Heap Leaching 33 LEACH PADS. The leach pad itself is a key element of the heap or dump leach process. Selection of the type of leach pad, detailed pad . design, …

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 ...

Dump leaching practice generally consists of dumping the low-grade run-of-mine material. The material is dumped over the edges of mining terrain under which a liner has been placed. It is sometimes placed on lined leaching pads. Leaching solutions are applied at the top of the dump and allowed to percolate through the dump.

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 ...

CA1093837A CA278,624A CA278624A CA1093837A CA 1093837 A CA1093837 A CA 1093837A CA 278624 A CA278624 A CA 278624A CA 1093837 A CA1093837 A CA 1093837A Authority CA Canada Prior art keywords ore dump copper h2so4 acid Prior art date Legal status (The legal status is an assumption and is not a legal …