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By R. Bernard

This paper will discuss innovative strategies that combine the capabilities of an Enterprise Asset Management (EAM) solution, sometimes referred to as a Computerized Maintenance Management System (CMMS) and E-Commerce solutions. Strategies discussed include solutions that minimizes the costs of operations through maximized equipment productivity and availability. Thusly, achieving the ultimate goal of keeping the cost per production unit as low as possible.

Jan 1, 2001

By Deepak Malhotra

Western technology is considered a panacea for all ills in developing countries. Is that really the case? Are inventors of new technology overselling? What are the expectations of the receiving party? The author offers his views on these questions and proposes a process for systematic transfer of technology while minimizing surprises on the part of the seller and the receiver.

Jan 1, 2001

By J. M. Gambogi

Demand for titanium minerals and pigments was nearly unchanged in 1996 compared with 1995. However, through mine expansions and process optimization by the TiO, pigment industry, the available supply of titanium minerals and pigments increased moderately. At the end of 1996, exploration, development and expansion programs were ongoing in the mining sector. But expansion projects in the pigment sector were delayed pending increased demand.

Jan 1, 1997

By Marina K. Peshkova, Izabell V. Pomorova

Computer modelling system for definition optimal way of in- vestment under condition of diverse directions of activities mining enterprises has been created. The main purpose of paper is to introduce the new scientific approach of finding effective variants of investment for mining industry under free market condition in Russia, it can be also interesting for domestic and foreign investors.

Jan 1, 1996

By John P. Fillion

This paper will present an overview of conveyor haulage systems. Technical and economic feasibility will be examined as conveyor haulage is applied to large western surface coal mines. Theoretical analysis and actual cases will be presented from NERCO Coal Corp. experiences in bringing this application to their Western mines.

Jan 1, 1989

By A. Zomosa

In the operation of continuous countercurrent decantation it is well known that an increase in the number of thickeners results in an increase of the fixed costs. But inversely it happens that the variable costs are reduced, i.e. the valuable material has a better recovery. The aim of this paper is to solve the problem by means of an economic balance of both parameters, in order to determine the optimum number of stages.

Jan 1, 1991

By D. Panda, P. K. Sahoo, A. S. Rao

The waste phosphogypsum produced by Paradeep Phosphate Limited (PPL) at Paradeep (Cuttack, Orissa, India) consists primarily of calcium sulfate with small amounts of phosphoric acid, calcium fluoride and other harmful components. Presently these are dumped as waste. In this work, laboratory trials have been made to utilize the calcium sulfate present in the phosphogypsum to prepare usable products like ammonium sulfate, calcium carbonate and magnesium sulfate.

Jan 1, 1994

By Jerry Harrington, Brad Wigglesworth, David C. Beling

Commercial operations at the open pit, heap leach Crofoot Mine commenced in April, 1988. Approximately 13,600 tonnes (15,000 st) of low grade pregnant solution are treated daily using a Merrill-Crowe circuit. Acceptable gold recoveries from these low grade solutions can be obtained by optimizing solution pre-treatment prior to zinc addition.

Jan 1, 1990

By Peniti Niskanen

Outokumpu metals & Resources (OMR) is a sub-group of Outokumpu Oy. OMR is a Mining and Metallurgy group of about 75 companies in 16 countries. The main activities are exploration, mine development and, mining and metallurgical processing of base metals.

Jan 1, 1996

By Deepak Malhotra

Is operator training necessary for optimization of flotation plants? The answer is obvious-Yes. The author suggests a three-phase program for operators when new plants are built or new crews are hired in existing operations. Case examples are discussed to illustrate the benefits of operator training.

Jan 1, 1999

By J. Changsheng, Z. Youdi

Based on the criteria of maximum net present value per ton of reserves and on the optimum matching of some other essential parameters, a comprehensive optimization model of surface-mine production rate is developed using system- engineering approaches and using the theory of economy of scale. A mine is then selected to demonstrate the application of the model.

Jan 1, 2000

By James F. ` King

This paper reviews the changes which have taken place in the supply of smelter-grade alumina and refinery-grade bauxite over the past twenty years. It highlights the current situation and identifies some trends which are to be expected in the medium- and longer-term future.

Jan 1, 1986

By Nina I. Fedunec, Olga E. Fomicheva

Results of researches on creation of the intelligent adviser system for mining dispatcher are represented. A method of the analysis of subject domain is considered and results as the generalized expert questionnaire and diagrams are represented. The system-adviser REALTREE, functioning in real time, is represented, results of an estimation of a system effectiveness during decision making by the dispatcher are submitted.

Jan 1, 1996

By M. A. Bothwell

The purpose of this paper is to describe the methods used to select mill discharge screens, and to outline factors which should be taken into consideration when choosing screens for this application.

Jan 1, 2001

By Priscilla P. Nelson, Yousof Abd Al-Jalil, Christopher Laughton

Prediction of excavation rates is a critical element in the pre-planning of a tunnel boring machine (TBM) project. A realistic evaluation of performance expectations is needed that reflects both the knowns and unknowns of the excavation process and geologic conditions. Current planning procedures are often based on deterministic “best guess” estimations. In this paper, a probabilistic approach to performance simulation is presented that will permit rational consideration of general and project-specific uncertainties in establishing realistic performance estimates. Companion to the simulation software is a database of over 600 public-domain case histories.

Jan 1, 1999

By Robert L. Bates

The field of industrial minerals and rocks includes such a wide diversity of materials and occurrences that communication is essential to foster a sense of "belonging? among geologists and other professionals. Besides, exchange of ideas and information is essential in meeting the needs of an ever-expanding world economy. A survey of the field shows to what an extent such communication--especially in the form of conferences and their proceedings--has increased during the past 25 years.

Jan 1, 1995

By Z. M. Zhang, Y. Luo, S. S. Peng

This paper presents the precise definitions of a number of commonly used subsidence parameters. Using an integrated approach, the parameters were determined for 110 subsidence cases collected from major US coal fields. Attempts were made to establish empirical formulae for the parameters. The results of this study indicate that some traditionally held concepts should be changed.

Jan 1, 1997

By Ch. Roumpos

The present contribution investigates the way of applying benchmarking for large-scale open-pit mining operations based on sustainability indicators proposed by numerous institutions or groups of experts. These indicators have been developed taking into consideration the legal and regulatory framework that are in force. However, their scope is not only to declare the mining company?s compliance with all legal requirements but also to represent its economic, environmental, and social performance. In this way, sustainability indicators allow assessment of a company?s capacity to produce commodities, to meet the environmental quality requirements and to contribute to a long-term economic, cultural and social development of the local communities.

Jan 1, 2007

By V. Nemec

The paper deals with further progress of the space and time models achieved since some of the previous APCOM symposia (1970, 1975, 1980) where original methodology was presented. Various transformations, de- and retectonization of space models, transfer of patterns, interactive time models are among the most important improvements. Enlarged possibilities of practical applications of the developed system are shown.

Jan 1, 1986

By Qingxia Liu, Chen Tingzhong, Chen Jin, Yang Xiaosheng

It is common problem (Huan Xinsheng, etc.,l992)for most iron ore concentrators in China that the concentration of thickened tailings is lower than the need for economical transportation. To solve the problem, two methods of improving the properties of the existing thickeners and using separate thickening technique have been applied in three iron ore concentrators. However, in the case of the Daye iron concentrator a new technique of cyclone-flocculated sedimentation was developed by present authors and verified by experiments. The new technique employs efficient hydrocydone designed by authors in conjunction with a low cost flocculant named KLP.

Jan 1, 1995