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By Joseph W. Ruetz

The paper describes the San Nicolas deposit, México. San Nicolás deposit is the most important VMS deposit discovered in Mexico to date, and a major deposit on a global scale. The discovery of San Nicolas resulted from the early recognition of VMS mineralization in a region not known for this style of mineralization, and the flexible use of appropriate exploration technology.

Apr 24, 2001

By B. Whistler

The Alpala porphyry copper-gold deposit is a recent discovery located in the Imbabura Province of northwestern Ecuador. The drilling of seventeen diamond core holes over a 900 m by 400 m area has defined a northwesterly-trending, steeply northeast-dipping dike-stock complex of diorite to quartz diorite that exceeds 1300 m in height. This intrusive complex is hosted by a sequence of andesitic volcaniclastic rocks and lavas. The host-rocks are interpreted to be part of the Paleocene to Late Eocene Macuchi Formation (BGS-CODIGEM, 1997; Cruz, 2007). The best drill intercept to date is 1312 m at 0.67 % Cu and 0.63 g/t Au from 128 m depth in CSD-15-012, which includes 576 m at 1.03 % Cu and 1.19 g/t Au.

May 1, 2008

By Jan Klein

"The last decade of the 20th century saw the development of one of the last missing geophysical tools for mineral exploration: the Airborne Gravity Gradiometer. It is possible that Airborne Induced Polarization, one of the stillelusive systems, will make its debut in the next few years. In this sense, the paper point out are the most recent and important improvements in geophysical technologies for mineral exploration. Airborne techniques are followed by the systems used on the ground and in boreholes. New equipment and data processing and modeling software are referred to. Brief remarks are made about developments that can be expected in the years to come, these will be mainly focussing on deep search in rugged and conductive terrains. "

Apr 24, 2001

By Reinhold A. Errath

The Antamina Concentrator plant was one of the first plants in the world, where about 60 Megawatt only in Milling Power was installed. As a consecuence of the use of Gearless Mill Drives the speed of the mills is adjustable, which allows the operators react to the different ore grades correspondingly, in order to get the best results in terms of milling efficiency. In this sense, this paper describe the basic idea of a Gearless Mill Drive, the construction of it, the manufacturing facilities, the transport, the installation and the function in detail. It gave enough insights to understand why Gearless Mill Drives are so reliable and used as an adjustable speed drive, why it counts with the highest efficiency of all drive systems.But it did describe as well the overload capabilities, the reaction to the network, the reason why the maintenance of the drive system is proven as a minor issue, and finally it was self- explaining why the Gearless Mill Drive is called a working horse.

Sep 12, 2005

By Eric B. Braun

"The paper describes Rio Blanco like a virgin porphyry copper discovery, located in Perú along the Ecuador border at the north end of a belt of copper systems that includes porphyry Cu-Mo, porphyry Cu-Au and highsulfidation types.Rio Blanco is a porphyry Cu-Mo system containing low Au and As. The presence of andalusite, diaspore and pyrophyllite, intense QSP alteration and absence of potassic alteration indicate a shallow level oferosional exposure."

Apr 26, 1999

By Benito Perez

Newmont Akyem mine in Ghana is committed with continuous improving results. A new environment where the price varies rapidly requires of better understanding of the deposits and the gold contained in the ore. This better understanding allows the mine planners to quick adjust and fast response to economic changes for gold price. Newmont Akyem Mine has approximately 9.4 million tons of ore in the stockpiles. Mine planers are still using average grade in all stockpiles to do a mine plan. The re-handled material is blended with the prime material coming from the mine.

Sep 1, 2017

Mintek's Measurement and Control Division has been developing and supplying control systems to the Minerals Processing industry for many years. This paper will focus on the development of a third generation control system, PlantStar 2000, for mineral processing applications. Case studies of a flotation and milling circuit illustrate the success of the technology.

Jul 17, 2000

By William R. Adamson

"The paper point out how mechanistic blast outcome models can be employed to explore the likely extent of achievable benefits associated with application of different explosive products, of quantifiably known characteristics.maximizing the advantages of the use of this modeling approach requires the use of field based measurements as model inputs, as has been done in this particular study. Inevitably, enhanced confidence in the routine application of the approach will be obtained through the collection, analysis and interpretation of field performance verification data such as fragmentation size distribution data. "

Jul 31, 2003

By Osvaldo A. Bascur

This paper presents a real time software infrastructure with people tools that gives the users the ability to sift through available data, transform data into information for business continuous improvement and optimization. In this sense, the paper introduce a simple collaborative tool to add context to business areas or assets for getting things done in an industrial complex

Sep 12, 2011

By Emilio Navarro

XML technology can be used as a standard to transfer information from a relational database to any system that relies on such information. There have been many proprietary methods to perform this information transfer, However, none of them was either able to talk to each other or exchange information in a transparent way. This paper describes a system that will allow for a transparent exchange of information not only between a Web browser and a Web Server but also a stand-alone application and the same Web Server. First, the autor summarize the Internet technologies that support the possibilities. Then the autor outline the tasks needed in order to take advantage of these technologies. Finally, it is suggest a few applications that could take advantage of this system.

Aug 25, 2002

By Alex Jankovic

The paper point out the high capacity processing of a hard, fine grained silica rich magnetite ore with several circuit operations was carried out to assess the energy efficiency, operating cost and project economics expressed through NPV. The result of the study autogeneuss grinding technologíes offers significant benefits over the conventional grinding circuits options.

Sep 21, 2013

By Rajiv Kalra

"The paper point out at evaluating the merits of oflarge geared mills versus gearless driven mills by evaluating the following factors: The capability of currently available systems in terms of power and milldiameter, efficiency in terms of overall electrical power consumed vs mechanical output power, capital cost, running costs, rooling requirements in terms of air versus water cooling and the installation and delivery time"

Sep 12, 2011

By Rubén Muñoz

This paper point out the discussion and evaluation of the non-conventional water resources; the discussion of the results of a multicriteria analysis which allows understanding and evaluating the differences; advantages and disadvantages from the technical-economical, social and environmental point of view of the non conventional water supply options: re use of municipal waste water as compared to seawater supply and its two sub options: raw seawater and desalinated seawater. The results show that there are advantages and disadvantages to each approach, but that use of non-conventional water resources is a viable option for mining companies.

Sep 21, 2013

By Quan Situ

In evaluating the influence of increased mine ventilation utilizing the vertical production shaft as intake or exhaust, various factors, such as conveyance motion and especially the shaft guide system, have been studied. Case studies of two typical conveyance guide systems, namely rope guide (in a potash mine) and fixed guide (in a hard rock mine) are presented.

Oct 21, 2015

By Victor Tenorio

At the present time, the mineral resources in the majority of underground mines are assessed and reported within a deterministic scenario. Irrespective of the techniques utilized for the estimation, the uncertainty in the reporting of resources is limited to their classification in categories such as Measured, Indicated and Inferred, according to a qualitative appreciation that depends on the abundance and quality of geologic information and sampling. Tonnages and grades reported within each category are treated as of fixed or variable precision depending on their classification; nevertheless, this degree of precision is not quantified, which makes it difficult for mine planning and can seriously affect the decisions that are taken on the resources of a deposit. The uncertainty in the resources comes from the lack of adequate geological information and grades, but this lack of information is very difficult to improve or supplement since the information-versus-cost curve increases exponentially

Sep 19, 2006

By Pierre Shields, Luiggi Sassarini, Richard Zandstra, Thomas Li

The intent of this paper is to demystify the mythology which often confront mine owners and engineers faced with this dubious question “Is it better to develop or continue a ramp or make a vertical shaft to access the new ore body of interest?” trough out measuring risk and return using probabilistic analysis and unhidden cost the affect long term decision such ventilation.

Sep 1, 2017

By Timo Toma

Hitherto flotation machines have by and large been operated and coaxed to best performance through the human endowments of sight and problem solving ability. A new device that measures accurately distinct froth characteristics on-line is now revealing fresh insights into the complexity of the froth removal, at the same time showing promise as a practical tool for the automation of stable control as well as flotation machine and flotation circuit performance optimization. The FrothMasterTM is introduced. Actual plant results are shown and discussed. A functional and practical leading edge solution to flotation machine control automation is presented.

Aug 25, 2002

By Chris Twigge

The paper point out development and successful commercial introduction of new technologies into a metalurgicall. The discussion that follows examines the overall issues of implementation from a management perspectiva and will highlight areas where key success factors are often overlooked. The framework presented is structured around the following key themes: The prime incentive for introducing new technologies is broadly one of economics, the implementation of new technologies is, to a large degree, a process of risk management and although the implementation of new technologies revolves around technical and economic issues, in the end the decisiva factor is people. Proper recognition of the human factors is critical to success. In this sense, the above principles are discussed in the sections that follow and include a number of examples to illustrate how technology can be successfully implementad and how it can fail.

Oct 6, 1999

By Dario Bernabe

This paper evaluates four open pit mine scheduling programs recently developed and compares them in order to determine if significant differences exist among them. The same input data, which consist of a 3-D block model, an economic set of parameters, and the initial surface topography for a operating copper mine in Southern Peru, was used to test each technique.

Aug 25, 2002

By Rob D. Morrison

The paper point out the opportunities for improved performance from Mine to Product using a range of technologies developed at the JKMRC. There are several underlying themes: Readily available computing power makes possible instrument like SPLIT, JKFrothCam and the JK/FEI Mineral Liberation Analyser, a large research project is underway applying acoustic monitoring techniques to large mills with the object being to more accurately monitor total mill load and ball load on-line. Taking advantage of these opportunities will require detailed ore characterization, good models and accurate measurement of mine and plant performance.

Sep 13, 2001