heap leach closure

Brewery Creek Report - Government of Yukon

Brewery Creek Report.doc 3.0 USE OF HEAP LEACHING IN THE YUKON – BREWERY CREEK The Brewery Creek Mine was an open pit heap leach gold mine, located approximately 55 km east of Dawson City in the Yukon Territory (Figure 2). The Brewery Creek Mine was first staked in October 1987.

Chapter 4 - GARDGuide

The decommissioning phase involves activities aimed to reestablish premining conditions (to the extent possible) or conditions suitable for beneficial post-mining land use. Active mining and the activities associated with mining and processing cease (e.g., cessation of dewatering activities, cessation of heap leaching).

Current Developments in Heap Leach Closure - CiteSeerX

closure approach can be developed that is well suited to the particular site, using a variety of “tools” that have been developed for heap leach closure. Closure Tools Rinsing The primary challenge of heap leach closure is management of the process solution inventory. Managing the …


Treatment of Cyanide Heap Leaches and Tailings 2 Since the 1970's and early 1980's, heap leaching has developed into an efficient way to beneficiate a variety of low-grade, oxidized gold ores. Compared to tank leaching, heap leaching has several advantages, including simplicity of design, lower capital and operating costs, and shorter startup ...

Heap Leach Facility Design, Construction, Operation, and ...

This course is for everyone associated with heap leach facility design, construction, operation and closure, including mining engineers, civil engineers, mechanical engineers, metallurgists, environmental specialists, hydrologists and hydrogeologists who would like to understand factors that are involved with heap leach pad design, operation ...

Geotechnical and Environmental Aspects of Heap Leach ...

The geotechnical and environmental aspects of heap leaching are very closely tied during design, operations and closure. Potential environmental impacts from heap leaching are mostly due to land disturbance and water quality issues, including both groundwater and surface water. Water quality issues are mostly related to containment design, which is primarily a function of proper...

Heap Leach Short Course -

The morning will conclude with a discussion on operational considerations, which include discussions on material handling, solution application and management, as well as other key issues to consider. The afternoon will be dedicated to heap leach closure issues, including a discussion on cover design, draindown and geochemistry.

Modeling Cyanide Degradation in Heap Leach Systems: …

This paper considers a heap leach gold mine using cyanide to mobilize gold. In order to anticipate closure and the different closure strategies SRK modeled the heap leach system once operations have stopped. After mine closure the solution circuit will be shut down and …

FACT SHEET Robinson Nevada Mining Company

operation, and closure of the A-, B-, and C-Pad gold heap leach facilities that were built on historic acid-leached dumps (ALDs) and WRDs surrounding the Ruth Pit. In early 1991 (the exact issue date does not appear in the Bureau of Mining

Heap Leach Engineering | Tailings, Heap Leach and Waste ...

His specialties include design, operational optimization, and development of integrated closure plans for tailings disposal, heap leach and process fluid management systems, with operating designs that demonstrate significant reduction of potential closure liabilities.

Erosion Protection Closure of Leach Heaps & Dumps

In the foreseeable future, closure and final abandonment of precious metals heap and dump leach operations is going to become more difficult and more expensive as each year passes. Aside from the removal or destruction of the heap’s or dump’s contained cyanide which is an entirely different subject, the other major problems facing the owner of the operation to be closed are; Both U.S ...

Paper: The evolution of cyanide heap leach closure methods

This paper documents the history of heap leach closure approaches since the late 1980s and discusses the evolution of understanding and consequently the methods proposed to stabilise spent heap ore during closure. Data from several closed heaps are presented as illustrations of the progression of approaches to heap rinsing.

InfoMine - Home | Facebook

That would be permitting, operations, metallurgy and closure of heap leach pads. Why are you having the conference in Nevada? Jeff Parshley: Nevada is a great place to do it because the modern heap leach operation developed for gold was developed in the State of Nevada in the 1980s. Nevada has been heap leaching for about 35 years.

Cyanide Heap Leach And Tailings Impoundments Closure

Cyanide Heap kach Closure SECTION 2. CYANIDE LEACHING Introduction Cyanidation uses solutions of sodium or potassium cyanide as lixiviants (leaching agents) to extract precious metals from ore.Cyanidation techniques used in the gold industry today include heap or valley fill leaching, agitation leaching followed by carbon-in-pulp (CIP), and agitated carbon-in-leach

Geotechnical engineering for heap leach operators

The authors present a geotechnical primer especially oriented to heap leach operators, as well as geotechnical engineers new to heap leaching. The geotechnical behavior of leach heaps and pads can have important impacts on a wide range of key issues, from leach kinetics to …

The Evolution of Cyanide Heap Leach Closure Methods - SRK

The evolution of cyanide heap leach closure methods J.V. Parshley et al. 74 | Mine Closure 2012, Brisbane, Australia When the first modern heap leach closure regulations were promulgated in the State of Nevada, USA, in 1989, the requirements for closure of heap leach facilities were based on limited information and a number

Sterling Mine -

Sterling is an underground gold mine in southern Nevada. Gold recovery is through heap leaching and a carbon adsorption-desorption-recovery (ADR) plant. Tierra Group team members have a long history at Sterling starting with heap leach pad final permanent closure planning and closure construction observation (Vector, 2004 to 2005).

Tailings & Mine Waste Engineering | Tailings, Heap Leach ...

Clara is a civil engineer with 12 years of experience in tailings and heap leach facility design, operation, and closure. She specializes in tailings storage facility …

NAUE Solution for safe heap leaching in mining industry

The growth of heap leaching is heavily tied to the massive scale on which mines are being built, with some sites requiring huge investments. Heap leach stacks can near 200m as operations look to more quickly prove and sustain site yield. Heap leaching accomplishes this—but only with the containment support of geosynthetics.

Heap Leach Pad Cover and Facilities Monitoring Program

Heap Leach Pad Cover and Facilities Monitoring Program August 2005 3 3. LC50 toxicity sampling will be completed on BC-28 on a MWA basis. 4. Results from the heap effluent water quality (BC-28a) will be reviewed to ensure the geochemical stability of the heap. Operating experience has demonstrated lag times in the heap from the top elevation until

Ayres and O'Kane 2013 Design, construction, and ...

1 Design, Construction, and Performance of Closure Cover Systems for Spent Heap Leach Piles – A State-of-the-Art Review Brian Ayres, O’Kane Consultants Inc., Canada Mike O’Kane, O’Kane Consultants Inc., Canada Abstract

North America - Heap Leach -

This paper documents the history of heap leach closure approaches since the late 1980s and discusses the evolution of understanding and consequently the methods proposed to stabilise spent heap ore during closure. Data from several closed heaps are presented as illustrations of the progression of approaches to heap rinsing.

Operational techniques to recover metal values from heap ...

operators worldwide during leaching and rinsing before heap-leach closure. Examples of the use of this technology are presented. Introduction: Nearly 10% of the entire world’s gold production is from heap-leaching operations--236 metric tons gold/yr (Marsden, 2006). Thus, heap leaching is an important process for the mining industry.

A Case Study for Final Closure of a Mine Site, Santa Fe ...

Dec 07, 2017· This paper presents a case study for the final closure of heap leach pads and dumps for an inactive open-pit gold mine in Nevada with the focus on management of draindown solution from the leach pads. Design and lessons learned in the permitting and construction phases will be discussed.

Closure - Engineering Analytics

Mining Project Profiles Closure Environmental and Engineering Reclamation Services. Black Cloud Mine, Leadville, Colorado. Engineering Analytics provides environmental and enginee

Paper: Mine closure experiences — Bolivia, South America

This paper reviews the results of the closure efforts of the gold and silver heap leaching operations on the highlands of Oruro and Potosí, where pits, mine waste, evaporation ponds and tailings storage facilities were closed. The paper also addresses another gold agitation leaching operation, in the rainforest which was also closed.

Infiltration, Seepage, Fate, and Transport Modeling Report

Illustration 2 Conceptual Closure Model of the Heap Leach Facility 2.1 Model Input Parameters Modeling was performed for two (2) primary steps in the life of the Heap Leach Facility: Drain-down of the heap after active leaching ceases (about a two (2) to three [3] year period); and Facility closure.


the design and management of tailing storage facilities (TSF) and heap leach facilities (HLF) to protect human health, wildlife and flora, protect groundwater and/or surface water, prevent uncontrolled releases to the environment, manage process fluids and set requirements for closure and reclamation.

Standardized Reclamation Cost Estimator (SRCE) | NDEP

The Nevada Standardized Process Fluids Cost Estimator (PFCE) for closure of heap leach pads and tailings storage facilities is now available for download (see below). NDEP, BLM, and Industry representatives jointly developed PFCE, which is an estimation tool for the calculation of bond amounts required for Interim Fluid Management (IFM) and ...


POTENTIAL ENVIRONMENTAL IMPACTS September 1997 B - 4 Materials and wastes from metal mining activities that have the potential to generate acid drainage include spent ore from heap and dump leach operations, tailings, waste rock, and overburden material.

Heap leaching - Wikipedia

Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from ore using a series of chemical reactions that absorb specific minerals and re-separate them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the ...


Heap leaching is a tried and tested mining technique enabling the processing of different kinds of ores which could not otherwise be exploited under viable economic conditions. Modern day heap leaching, which has a relatively low level of energy consumption, is for example

Technical Report Treatment Of Cyanide Heap Leach And Tailings

Summary of State Requirements: Cyanide Heap Leach and Tailings Impoundment Closure and Reclamation (Continued) State Treatment Criteria Reclamation/Bonding Nevada General Performance Standard that facilities may not degrade the waters of the State. Surface water quality is …

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