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By Jean Legault

ZTEM is a natural field airborne EM technology that is in its 10TH year of service and is widely used for porphyry copper exploration around the world, yet is still considered a new technology. ZTEM uses EM fields generated by worldwide thunderstorm activity as is primary source field. Its large depth of investigation (>1km), its sensitivity to weak lateral resistivity contrasts and the relative simplicity of its EM fields for computer modelling are among its greatest attributes. ZTEM has helped discover blind porphyry copper deposits and is also widely used in unconformity uranium, epithermal gold and geothermal exploration around the world.

May 1, 2008

By George Shou

"The paper point out about economics of thickened tailings transportation. In this sense, the optimal concentration is determined based on the balance between the incremental costs of thickening and transportation and theincremental environmental benefits. A detailed feasibility study is essential for financial success of a tailings project. Hydraulics modeling is the key to estimate the transportation cost curve. "

Jul 31, 2003

By Marc Leduc

Since co-disposal technology promises to replace conventional tailings disposal methods at sites with high strip ratios or plentiful old dumps. While the mine waste needs to be relatively strong and low in fine material, and chemical compatibility must be assured, when these parameters are satisfied there are no other significant hurdles to its implementation. In this sense, the paper describe the resulting benefits range from substantial reduction in capital and operating costs to reduction or essential elimination of the short- and long-term liabilities associated with tailings dams are impoundments.Since tailings dam failures are arguably the greatest environmental liability and public relations problem in the industry, reducing the quantity of tailings managed behind dams is a worthy goal.

Jul 31, 2003

By Leonard Harris

"One of the reason to its decline are nationalization of some of the United States company mines in the developing world has been the spectacular rise in extreme environmetalism, which has warped public opinion about mining and delayed and denied exploration and operating permits of many projects in the United States. In this sense, the paper point out this “disease” is speading rapidly to Latin America but can be stopped or atleast controlled, by the union of mining company forces with the strong backing of trade organizations along the lines which have been succesfully instituted in the United States. "

Jul 31, 2003

By Mustafa Onder

The paper point out that there are two méthods in the design of the long auxiliary ventilation systems. These methods can be summarized as constant fan spacing and constant fan size. If the fans are placed at the end of the duct, leakage will increase due to the high combined pressure.Also The program called SERIP can be used to examine the effects of positioning the fans at varying distances along the duct and determine the appropriate locations.

Jul 17, 2000

By Roger Henning

Although flotation is widely used throughout the minerals industry, it is a relatively inefficient process. The economic benefits of improved operation are considerable. A multivariable level stabilising system has been developed to reduce the amount of fluctuation in flotation levels. It has been shown on several plants that the better level control leads to improved metallurgical performance. A level measurement based on conductivity is also described. The device provides some insight into the behaviour of the froth.

May 25, 1998

By Luis Yacher

Proccesing plants currently have sophisticated regulation and control systems and there also systems of managment of the quality and laboratory variables, for the mine-plant transport managment, mineralogical extraction, characterization, maintenance managment were desgined to support specific operational business functions: to operate, maintain, control quality, manage the fleet, etc. The vision of systems dedicated to supporting specific business functions contradicts what is nowadays an integrated business operation, esenctially multidisciplinary and it which the managment and supervision process require access to heterogeneus information sources regarding their regarding their origin and managment system. The consecuence of ongoing pressure for operational excellence is the need of more "fine-lunning"of the processes must be adressed in a synchronized way. Hence, the need arises of restating the issue of operation and related information, for which a new conceptual and techonological focus is proposed aimed at the objetive of operational excellence.

Sep 19, 2006

By R. W. Lawrence

This paper provides a brief overview of biogenic sulphide reagent production from elemental sulphur, discusses the main advantages of recovering metals and treating heavy metal pollution using biogenic sulphide, and presents operating results from commercial plants.

Sep 12, 2005