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By Osvaldo A. Bascur

Connectivity between mining and metallurgical process operations and their business systems has become a reality. Expanded use of plant information on the desktop is a standard tool for revenue improvement, cost reduction, and adherence to production constraints. The industrial component desktop support access to information for continuous improvement and innovation by staff personnel and engineers. Collaboration between groups enables the implementation of an overall process effectiveness index based on losses due to equipment availability, production recovery and quality rate. In this sense, the paper point out three cases studies of large integrated power stations.

May 25, 1998

By Adilson Curi

"A fundamental aspect in the development of any open-pit mining project is the determination of the mineable mineral reserves, obtained with the design of the so-called ultimate pit limits. In this paper, firstly the Vulcan software applied over the data of MR phosphate deposit will be introduced. Modeling of the ore deposit has been done by geostatistical and conventional methods by using geological data of 41 diamond core samples. Insitu geological reserves were estimated to a level of accuracy to support detailed mine planning. Ore body has been divided into regular three dimensional fixed blocks. The ultimate pit limits of the model deposit weredetermined by the vulcan program by an optimizing technique. Additionally, the approximate location of the deposit and drillholles and the contour map of the ultimate pit limits generated by the vulcan program are presented. "

Jul 17, 2000

By Patrick P. M. Afenya

"The paper point out the mineralogical aspects about metals processing volcano-related gold, silver and copper ores. The copper group of metals comprises gold, cooper and silver. These metals have been considered together here because of similarities in their chemical properties. Consequently, these metals commonly form minerals with the same elements or group of elements. It is realized that the formation of minerals and final physicaland chemical states of any mineral may depend on many factors such as temperature, pressure, activity of species and pH of the fluid, mode of formation, paragenesis, geological age and post crystallization events. For the purpose of this discussion, attention will be focused on temperature as the principal factor influencing mineral formation."

Jul 31, 2003

By Patrick High Smith

The paper summarizes the results from geochemical orientation and project surveys in North and South America. The orientation surveys were designed to characterize the soil gas response over buried mineralization and compare soil gas geochemistry with other geochemical exploration techniques for overburden. In addition to successful tests in orientation surveys, soil gas geochemistry has been applied in large-scale exploration programs for gold, copper, and zinc. The studies includes results from several of these surveys, including the Crandon Zn-Cu massive sulfide deposit in Wisconsin, USA, and the Ruby Star skarn Cu deposit in Arizona, USA.

Apr 24, 2001

By Xuejing Xie

Exploration geochemistry for many years has been very effective in searching for mineral deposits covered by residual overburden or blind ore bodies hosted in pre-ore rocks. It has not been as effective discovering ore bodies deeply concealed under various kinds of transported overburden or post-ore sedimentary and volcanic rocks. From the 1980s to 1990s, various types of new geochemical techniques with the ability of deep-penetration through exotic covers have been developed. The concepts and methodology of deeppenetrating geochemistry are evolving from partial extraction and gas surveys prevailing from the 1950s up to now, but there are intrinsic differences. Most of the new deep-penetrating methods are used in detailed surveys to delineate deeply concealed ore bodies which could not be ascertained by conventional geological, geophysical and geochemical surveys. In this sense, the sampling and analytical methods of Nameg and Momeo are described briefly. Experiments of such strategic deep-penetrating geochemical surveys have been carried out in desert, alluvium, steppe and laterite covered terrains in China, Australia and Uzbekstan.

Apr 24, 2001

By J. Scarbrough, J. Barrett

Vector Induced Polarization arrays aim to provide unbiased and minimally low spatial sampling of artificially generated electric fields to efficiently investigate the Induced Polarization and Resistivity variations in the subsurface, generally of use in the exploration of disseminated sulphide systems beneath large covered areas.

May 1, 2008

By G. Ward Wilson

Waste rock and tailings may be combined through intimate blending to create new materials with superior physical and hydraulic properties. The new material, termed Co-Mix, has high shear strength characteristics, low compressibility, low hydraulic conductivity, and a high water retaining capacity. Co-Mixed tailings and waste rock may be used to construct cover systems, internal barriers and seals, confinement structures and full depth waste repositories. Field scale test trials using Co-Mixed blends of waste rock, tailings and slag have been constructed at the Copper Cliff Mine in Sudbury, Canad. These lysimeters will be used to evaluate the performance of the new material for cover systems that may potentially be constructed on the tailings impoundment upon closure. In this sense, the paper point out the construction of the lysimeters with respect to expected field performance during the spring snow melt period and summer to produce cover systems for closure.

Sep 12, 2005

By Robert Gordon, Leduar Ramayo

This paper reviews the application of the magnetotellurics method for deep earth imaging, specifically its recent use to better understand original mineral emplacement processes. Resistivity information from newer innovative applications of the technology for nearer surface imaging also provides valuable insights into near surface structure, which in some cases has led directly to new discoveries.

May 10, 2023

By R. Bergstrom

The implementation of a Quality Management System (QMS) or an Environmental Management System (EMS) that conforms to the standards issued by the International Organisation for Standardisation (ISO) no longer needs to result in a bureaucratic nightmare supported by mounds of paperwork. In this sense, this paper describes the Quality Management System that was implemented and demonstrates how the technologies that were developed can be used to satisfy other similar requirements.

Aug 25, 2002

By C. A. Brown

"Steady-state simulation has been used for over 20 years to optimise the operation of crushing and grinding circuits. Throughout that period continuing comminution research has been the basis for improving the models.Site surveys, ore characterisation, model development and investigation of different operating scenarios by simulation has proved to be a cost-effective method for improving plant performance. In this sense, this paper presents findings from experience with these valuable optimisation techniques with reference to specific case studies."

Sep 12, 2005

By Ronald Benito

El presente texto señala el algoritmo basado en grafos como la técnica que determina el límite óptimo de minado a cielo abierto. Por ello, se adaptó la técnica de Lerchs y Grossmann y intermedias (algoritmos) y fue usada para crear nodos, arcos y estructuras de árboles en tablas para determinar la máxima cerradura de un grafo.

Sep 1, 2013

By José Luis Vitteri

Dado que se generan largas colas de los camiones mineros en los puntos de carga, es necesario revisar las causas principales que la originan. Entre estas tenemos: el desconocimiento de la variabilidad y sus efectos nocivos y la aceptación de que el mínimo costo de operación se obtiene con la mayor utilización de la excavadora. En este sentido, el presente texto describe el manejo de la variabilidad en los procesos de carguío y transporte con equipos pesados a través del estudio de sus causas, de forma que la única manera correcta de reducir el perjuicio de la variabilidad en el transporte, es manipulando la frecuencia inicial de los camiones.

Oct 1, 2013

By Luis Artola

El presente texto señala la estrategia de implementación, la estructura y los principales entregables para lograr la integración de tres aspectos de la gestión de la organización: la calidad, la seguridad, salud y la protección del medio ambiente. Para ello, se utiliza el sistema de calidad ISO 9001 como modelo de mejora continua que integra a los otros dos sistemas de gestión (de seguridad/salud y medio ambiente) de forma que enlaza con el modelo de gestión de proyectos (del PMI) para la realización de los trabajos.

Apr 1, 2015

By Jorge Sandoval

El presente texto señala un modelo conceptual genérico, cuyo uso de plataformas informáticas permite revisar la validación de la data, previa a la emisión del KPIs, de forma que genera rigurisidad y representatividad para el análisis. En ese sentido, el modelo se basa en la integración de las plataformas, reduciendo los tiempos de procesamiento de la data y eliminando sesgos por la manipulación de la misma. Asimismo, homologa y standariza los árboles de equipos, modos de falla, entre otros aspectos.

Mar 1, 2016

By Jorge Tramaglia

En la naturaleza existe elementos radioactivos naturales conocidos por las siglaS NORM ( naturally occurring radioactive material) que desde su origen en el reservorio, se movilizan acompañando al petróleo hasta las instalaciones de proceso en superficie. En ese sentido, el presente texto señala la radioactvidad de esto materiales, transporte y acumulación, procesos de separación, valores de contaminación, las formas de irradiación y la espectometría.

May 1, 2015

By Juan Beltrán

Durante el tiempo de operación de la refinería de Ilo, el teluro ha ocasionado problemas operativos en la calidad de depósito, al contaminarlo química o físicamente. El objetivo del presente estudio fue minimizar la concentración de teluro en la solución de agua madre, producto de la lixiviación de lodo anódico, mediante el proceso de cementación de teluro con cobre. En las pruebas desarrolladas en planta se alcanzó una extracción de 24% de Te, lo que hizo posible dar mayor valor agregado a los subproductos de la refinería.

Sep 30, 2020

By Jerry Rowe

There are numerous examples of historic and recent mines that have no closure system or have poorly designed closure systems. These mines may contaminate water resources, land resources and cause significant impacts to human health and the environment. As a result of these problems, many regulatory agencies around the world require that mine closure systems be implemented to manage ARD and protect water resources. In this sense, the paper discusses some of the key elements that need to be evaluated when selecting a mine closure system. These include the specific site climatic, hydrogeologic, hydrologic and geochemical conditions that must be considered for closure design. Two examples of innovative mine closure systems that have been implemented to take advantage of site specific conditions to effectively manage water are provided. The mine closure systems incorporate passive measures to control ARD (acid rock drainage) and protect water resources.

Sep 21, 2013

By Gloria Lara

El presente texto señala la aplicación de la metodología de daño proporcionales a tres casos de correas transportadoras críticas que funcionan sobrecargadas en una minera al norte de Chile y así determinar el nivel de carga necesario para mantener un nivel de confiabilidad.

Mar 1, 2015

By Pablo Espinoza, Ezequiel Chancan, Luis Loaiza

En este artículo se desarrolla un proceso alternativo al SART, viable para recuperar cobre y zinc por precipitación fraccionada o selectiva. El proceso propuesto es aplicable a soluciones (Barren) producto del proceso Merrill Crowe de precipitación de plata y oro con polvo de zinc, que es recirculada como agua de proceso al circuito de cianuración. En el trabajo se determinan los parámetros para una exitosa precipitación fraccionada de zinc y cobre a partir de una solución cianurada en medio alcalino. Se concluye además que la recirculación de la solución cianurada con menores contenidos de cobre y zinc mejora la recuperación de plata y el rendimiento del proceso de control de cianuros en la solución agotada que constituye el relave final.

Jun 30, 2019

By Ángel Fernández

En Minera Coimolache se generan aproximadamente 700 t de residuos sólidos al año. El 50% de estos corresponde a residuos orgánicos, los que mediante fermentación anaeróbica con microorganismos eficaces son transformados en un plazo muy breve en bioabonos sólidos y líquidos (solución ecológica). Los microrganismos eficaces presentes en estos bioabonos han mejorado notablemente los procesos de siembra, incrementando hasta en un 361% la densidad poblacional de la misma. Por otro lado, dado que la actividad microbiana generada compite por el oxígeno del suelo reduciendo de forma colateral la generación de drenaje ácido de roca (el pH incrementó de 2.02 a 7.55 y se redujeron metales como el Fe, Pb, Cu y Zn), se ha obtenido una solución económica al emplear suelos abonados, como sustituto de la cal, para la cobertura de depósitos en proceso de cierre.

Jul 30, 2018