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THE Lehigh Valley Section is planning with a num-ber of other organizations a three-day conference, April 25, 26 and 27, with field visits to cement, slate and steel plants in the vicinity of Easton, Pa. W. B. Plank is chairman and D. Knickerbocker Boyd is sec-retary. Headquarters will be at Hotel Easton. Wednesday' will be cement day. In the forenoon A. S. T. M. Committee D-16 will meet and after luncheon the delegates will visit the Martin Creek plants of the Alpha Portland Cement Co. An evening dinner and general session on cement is being arranged. Thursday morning will be devoted to a technical ses-sion on slate, and the breaking of ground for the new John Markel mining building at Lafayette College. After luncheon various slate quarries will be inspected, the visitors being guests of the companies. In the eve-ning there will be a conference dinner at Hotel Easton with a number of distinguished visitors. Friday will be given over to steel and will include a visit to Lehigh University, an inspection of the plant of the Bethlehem Steel Corp., and a luncheon as guests of the latter.

Jan 3, 1928

By E. F. Jr. Young, H. E. Steinman, G. C. Smith

Through a progressive laboratory and pilot-plant program Jones & Laughlin Steel Corp has analyzed and corrected mine drainage pollution problems at all of its coal mines. In conducting this program, the company found no "typical" drainage discharge. Each discharge point at each mine was unique, so that varied approaches were needed to eliminate stream pollution. To illustrate the variety of these approaches, the treatment of drainage from foul, discharge points at three mines in Pennsylvania will be considered here. The flows and critical analyses of the drainage sources and treated effluents arc shown in Table I. Hydrated Lime Works at Thompson Borehole The discharge stream from the Thompson bore- hole at the Vesta No. 5 mine flowed into a small branch creek where it created a "yellowboy" deposit and affected aquatic life. Investigation indicated that hydrated lime would neutralize the acid and precipitate ferric iron without aeration. Treatment of the 150.000-gpd flow, however, created about 4000 gpd of wet sludge for which there was no nearby accumulation site. With State approval, this sludge was deposited through an unused borehole into an abandoned section of the Vesta No. 6 mine several miles away.

Jan 1, 1970

ADDRESS BY THE PRESIDENT OF THE INSTITUTE (MR. C. H. MARTIN) IN PRESENTING THE CERTIF1CATE TO SIR GEORGE FISHER, C.M.G.Members of The Institute, distinguished guests, of which there are many, ladies and gentlemen, you are welcome.And might I add a special welcome to Lady Mawby and Lady Fisher and to Sir George's only son Peter, who with his wife, Betty and one of Sir George's three daughters, Helen, are present this evening, and also to Sir Maurice's son, Colin, and Colin's wife, Jay, also in our company.The family presence must surely be a great source of pleasure and satisfaction to all those so intimately concerned.It is hardly. necessary for me to state the sole and only rC'l.son for our presence here tonight, which is to conJer on Sir George Fisher and Sir Maurice Mawby Honorary Membership of The Australasian Institute of Mining and Metallurgy, and at the same time to acknowledge two people who have rendered great service to the mining industry albeit tinged with sadness to all of us in the knowledge that from now on their influence may diminish.

Jan 1, 1976

THE CHAIRMAN (H. W. MORSE, Los Angeles, Cal.).-I would like to open this meeting for a little while to the general subject of leaching. We ought not to hold back if we have any new schemes for the future. I know that those of us who are tangled up with this lei thing work will appreciate any suggestions that will make us work harder and, scheme, harder to pull through these past difficulties on leaching. F. S. SCHIMERKA, Clifton, Ariz.-Under the direction of J. W. Bennie, General Manager of the Shannon Copper Co., Clifton, Ariz., 'it has been my valued privilege to cooperate in the elaboration of a hydrometallurgical process aiming at the recovery of copper in mill tailing resulting from a gravity concentration of a low-grade semi-oxidized sulphide ore occurring in a porphyritic gangue. The experimental work which has been carried on with a 25-ton plant is completed, and the company is building at present a leaching plant on a larger scale, the first unit consisting of a 150-ton roasting furnace and accessories for leaching the calcine.

Jan 12, 1916

ENGINEERS AVAILABLE (Under this heading will be published notes sent to the Secretary of the Institute by members or other persons introduced by members.) Member, technical graduate, aged 40, member Institute of Mining and Metallurgy 16 years, with varied experience. Actual underground work,. foreman, surveying, milling, mine examination, superintendent, manager, and other positions of trust. Several years' European practice. Familiar with flotation process. Desires responsible position. References furnished. No. 172. Member, aged 40, graduate Massachusetts Institute of Technology. Twenty years' successful experience as blast-furnace superintendent (merchant and steel works), covering operating, remodeling and? building. General superintendent and general manager of proposition comprising blast furnaces, coal and coke, and iron-ore operation, etc. Good organizer and handler of men. Desires position in above line anywhere. No. 173. Member, technical graduate, aged 43, with 20 years' experience in management of gold, silver, and copper properties and also coal and smelting properties in United States, Canada and Mexico. Owing to illness compelled to resign. Now open for engagement. No. 174. Member, technical graduate, with many years' experience with large smelting and refining companies as chemist, metallurgist, and superintendent desires position. No. 175.

Jan 1, 1915

By C. P. Mangelsdorf

Introduction During the 13 years since C. C. White introduced the Birmingham roof truss there has been a revolution in permanent roof support technology. While not all of the emerging concepts have their origins in the truss-resin bolting is a prime example - the combinations and permutations of devices presently available to the underground mining industry reflect a well-spring of creative activity. The purpose of this report is to chronicle a number of roof support system that have same physical similarity to the Birmingham truss, and to report on their application. Definitions The application of the tern "truss" to the device developed by White of the Birmingham Bolt Company in 1967 may be derived from the classical technique of stifwood, by the attachment of an underslung, sometimes pretensioned metal strap, rod or cable. If the beam is separated from the reinforcement by a single block or vertical post it is called a "King's Post Truss". If two equally spaced blocks or posts are used it is referred to as "Queen's Post". When the immediate roof of a mine is visualized as a beam, the Birmingham device completes a structure resembling this latter form.

Jan 1, 1982

By John C. Ludlum

A most stimulating event in the development of world mineral production and technology, the Eighth Commonwealth Mining and Metallurgical Congress was convened at Melbourne Town Hall on March 1 by Sir Maurice Mawby, President of the Congress. Continuing successively at Melbourne, Canberra, Sydney, and Surfers Paradise in Australia and then at Wellington, New Zealand, the four plenary sessions, 50 technical sessions, and both local and extended mine and plant tours during the seven weeks of the Congress, provided a superb medium for assessing the present and looking into the future. There were more than 2300 participants from 32 countries in the various functions of the Congress, including 500 delegates and wives from countries other than Australia and New Zealand, and from 18 countries not members of the British Commonwealth of Nations. Registrants from South Africa numbered close to 200 and there were about 100 from Canada, 70 from the United Kingdom, 60 from the United States, and 20 from Zambia. Although most of the overseas delegates held administrative positions with companies, government agencies, and colleges or universities, professions identifiable from registrations included 100 engineers, 60 geologists and 30 metallurgists.

Jan 8, 1965

By E. A. Rychkun

It is essential for a. mining company to determine an optimal mining strategy which will maximize the return on investment. In the case of Placer Development Ltd., the Lerch-Grossman three-dimensional optimization technique has been implemented on a digital computer to assist in the determination of such a strategy. It is the purpose of this chapter to explain and illustrate the methodology of the Placer Development Ltd. computer system with emphasis on the feasibility phase of a mine's development. In the Placer Development Ltd. strategy determination process, it is essential that certain objectives be considered: 1) There must be some means of constructing a realistic computer model of an ore body which gives a significant weight to geological constraints. 2) Data must be accurate and quantifiable. 3) Computer solutions must be unique, i.e., approximation or iteration methods of determining optimal solutions are undesirable. A method must be used which, when given fixed parameters and data, yields a mathematically sound unique solution. The following material is a presentation of how these objectives have been implemented. The flow of this outline will be from the general to the specific, with an example application.

Jan 1, 1979

By David L. Bradfield

This paper covers the development of the Yeelirrie Uranium Project from the discovery of the Yeelirrie deposit in 1970 to the present time, with emphasis on the mining, processing, and environmental requirements of the project. The Yeelirrie Uranium Project is managed by the "Yeelirrie Uranium Joint Venture Partnership", which, when formed, consisted of Yeelirrie Development Company Pty., Ltd., Urangesellschaft, Australia Pty. Ltd. and Esso Exploration and Production Australia Inc. The Yeelirrie Uranium Joint Venture Partnership holds mineral claims over the Yeelirrie uranium ore deposit in Western Australia. This deposit encompasses some 35 million tonnes of ore containing in excess of 50,000 tonnes of uranium as U308. Agreement has been reached with the State of Western Australia to mine and process the ore to produce uranium ore concentrate. The Project scope provides for an open-cut mine, alkaline leach hydrometallurgy plant, power plant, township, airstrip, access roads, community services and utilities. The Yeelirrie Uranium Project described herein has progressed through the stages of exploration, mine evaluation, process testing, project scope definition, environmental approval, Pilot Plant operation, preliminary engineering and the publishing of a definitive Project Feasibility Study. This article summarizes the project development through the above stages.

Jan 1, 1984

By C. J. Savage

Rio Tinto Minera, S.A. operates in Southern Spain, at one of the most ancient mining sites in the world, using advanced computerised mine planning. This paper describes the development and application of the mine planning systems to the copper and gold/silver operations. It briefly covers the hardware configuration, and the advantages and improvements in mine planning achieved. The system's application started with the long term mine planning of Cerro Colorado (open pit) copper mine and was gradually extended to cater for the medium and short term planning requirements of the other operations of the Company. The base of the system is a mineral inventory established by the combined use of the geology and geostatistical methods, and compatible with the mine planning requirements. The planning system has three major components: one used for open pit design and long term mine planning, another used for blast evaluation and finally one used for short term mine planning. Recently, a fourth component has been added to the system for reconciliation between predicted and actual tonnages and grades. There is common data file transfer throughout the system.

Jan 1, 1986

The Yabulu refinery of Queensland Nickel Pty Ltd located near Townsville now imports more than three million wet tonnes per year of nickel laterite ore from New Caledonia and Indonesia, making it the largest importer of any commodity in Australia. The project has illustrated that importing untreated bulk ore and re-exporting high value products makes good economic sense for the company and the nation. The economics of this exercise have been considerably enhanced in the past year by changing the project's principal product from nickel oxide sinter to refined high purity nickel metal. It is one of the few operations in the world where nickel ore is transformed to nickel metal at a single site. Several novel technological processes were developed at Yabulu and incorporated into the refinery to allow this product transition to occur. By utilising internally developed technology the new processes were installed at a capital cost of less than $10 million. It is unique for a large nickel producer to completely change the quality of its entire product range many years after the plant was constructed and considerable attention to marketing the new products has been required.

Jan 1, 1995

By J. Koskinen, P. Vanninen, T. Leskinen, A. Leppala

Continuous and accurate analysis of slurries has become a critical requirement in mineral processing. With on-stream assay data, automation procedures can be employed to obtain higher recovery and improved control of production. The Courier system was developed by Outokumpu Oy, taking advantage of mineral processing know-how, to provide means for achieving these objectives in the company's ore concentrator operations. It became evident, based on early experience with on-stream analysis, that the Courier should be a complete system to fulfill all functions of the analysis operation. The system includes equipment and techniques for primary sampling, sample preparation for assaying, and processing of data for final assay results. In addition, the on-line X-ray spectrometer unit was developed specifically for industrial use, incorporating a number of technical advances. A new system for converting spectrometric data to assays is based on a physical model programmed on a digital computer. The Courier system is furnished on a turn-key installation basis incorporating all elements needed for operation including calibration. The experience to date with the Courier system at the Pyhäsalmi concentrator is summarized. Reference is also made to recent results with installations at the Outokumpu and Vihanti concentrators.

Jan 1, 1972

By L. B. McConville

The general term "tar sand" refers to sand that contains varying amounts of dense, viscous petroleum. Tar sand deposits have been found throughout the world, often in the same geographical area as conventional petroleum. The largest one by far is known as the Athabasca Tar Sands, in the province of Alberta, Canada. Actually a group of three deposits, these particular sands underlie an aggregate area of more than 12,000 sq miles. Current estimates place the contained raw petroleum at about 700 billion bbl; and via currently available technology, the amount of recoverable synthetic oil may be as much as 300 billion bbl-which is roughly equivalent to five times the combined US and Canadian total crude oil reserves. With the ever-widening gap between energy supply and demand, mining and petroleum companies are now evaluating all possible energy resources-both developed and underdeveloped-and, certainly, the Athabasca Tar Sand deposit is one of the more important ones to merit such attention. The first section in ME deals with the geology and historical developments; the other four sections, with mining methods, extraction technology, economics, and outlook.

Jan 1, 1975

By Luciano Almeida de Freitas

Este artigo tem como objetivo verificar os resultados da aplicação de ações que almejam a excelência no processo de carga, descarga e transporte de minério ferro de uma empresa situada na Região do Médio Piracicaba em Minas Gerais. Esta pesquisa é um estudo de caso de natureza exploratória e documental. No desenvolvimento deste estudo foram analisados os documentos da empresa, que referem-se às atas de reunião e relatórios gerenciais. As reuniões foram realizadas pelos gestores e supervisores do processo de carga, descarga e transporte de minério para identificar falhas e apresentar ações que almejassem a excelência no processo produtivo. Por fim, os resultados foram verificados e identificou um aumento no índice da utilização física dos caminhões de 11,46%, aumento da produtividade horária de 27,5% e um crescimento da movimentação total de produção dos caminhões de 23,92%. Com isso, pode-se verificar os ganhos com a aplicação das ações implementadas, que almejam a excelência nas operações.

Oct 30, 2017

By Rudá Grossi Coimbra Martins

A estruturação organizacional da gestão da informação em Central de Serviços já está consolidada no ambiente de Tecnologia da Informação. O ambiente de Tecnologia de Automação compartilha características semelhantes, já que também fornece serviços para seus clientes. Entretanto, serviços de automação possuem particularidades derivadas, em grande parte, do fato de que são mais críticos para a atividade fim da empresa, já que visam manter a operação. Implantar uma Central de Serviços em ambiente de Tecnologia de Automação de uma empresa já existente demanda uma série de modificações em termos de Tecnologias, Processos e Pessoas para trazer os retornos desejados em termos de gerenciamento, organização da rotina e disponibilidade dos ativos. Este trabalho apresenta alternativas para atuar sobre os três componentes supracitados durante a implantação de uma Central de Serviços, com foco em sua operação através de uma Gestão Compartilhada (Cosourcing). Experiências adquiridas em projetos de especificação e operação de Central de Serviços também são apresentadas para embasar a estruturação da gestão da informação em ambiente de Tecnologia da Automação de indústrias de Metais e Mineração.

Jul 30, 2018

By M. A. Bérubé

Le but principal de cette étude était de vérifier certaines hypothèses de nature minéralogique susceptibles d'expliquer en tout ou en partie les variations importantes observées au concentrateur no 1 de Mines Gaspé quant aux performances du circuit B de broyage et de flottation. A cette fin, nous avons examiné six séries d'échantillons prélevés lors d'une campagne de mesures effectuée au cours de l'été 1980. Ainsi, la capacité du circuit de broyage semble dépendre principalement devariation s dans les caractéristiques minéralogiqu es et texturales du minerai, par exemple du rapport grenat/quartz, le grenat ayant une influence néfaste sur le rendement de cette étape, contrairement au quartz . Quant au processus de concentration, la fraction du cuivre sous f orme de minéraux difficilement récupérés par flottation, en particulier des carbonates de cuivre, varie de façon significative dans le minerai, et cela peut certes expliquer en partie des récupérations parfois plus basses. Malgré ces variations important es de la composition minéralogique globale du minerai et de sa broyabilité, le degréde libération des sulfures de cuivre dans le produit de broyage dépend presque seulement de la granulométrie de ce produit. Afin de garantir des performances égales à l'étape de concentration, il est fortement suggéré de contrôler cette granulométrie à un niveau constant.

Jan 1, 1984

By Grant Arnold

Le Camp Minier de Matagami est situé dans la ceinture volcano-sédimentaire Harricana- Turgeon appartenant à la Province du Supérieur, sous-province de l?Abitibi, au Québec. Les gisements de métaux de base polymétalliques sont retrouvés exclusivement dans les deux domaines lithotectoniques comprenant l?association basalte-rhyolite (Matagami-Brouillan et Joutel-Raymond). Tous ces dépôts, à l?exception de ceux de Selbaie, sont de type exhalatif et représentent des dépôts volcanogènes à Zn-Cu, typiques de l?Archéen. Le complexe volcanique de Matagami est constitué principalement de deux phases de volcanisme tholéïtique. Les dacites et les rhyolites du Groupe de Watson, représentent la phase la plus précoce et celles-cis sont recouvertes par la seconde phase qui est constituée majoritairement de roches intermédiares à mafiques intercalées d?horizons felsiques, formant le Groupe de Wabassee. Un sédiment chimique sulfuré, la Tuffite Clef, marque le contact et l?hiatus entre ces deux groupes. Cette tuffite est reconnue à la grandeur du flanc sud du camp minier et représente l?horizon favorable à explorer puisque sa déposition a correwspond à une période d?intense activité hydrothermale. Le complexe volcanique de Matagami est limité au nord et au sud par des bandes sédimentaires orientées est-ouest, connues respectivement sous les noms de Groupe de Matagami et Groupe de Taïbi. Le Complexe intrusif de la Rivière Bell, qui occupe la base du Groupe de Watson, est un complexe lité consistant en une séquence stratifiée gabbroïque avec localement des niveaux stratiformes à concentrations d?oxydes magmatiques, la bordure de ce complexe est marquée par la présence d?un horizon granophyrique. Cette intrusion synvolcanique prétectonique, représente probablement la source de chaleur étant à l?origine de l?activité hydrothermale observée dans les roches volcaniques sus-jacentes. Suite à un levé aéroporté, le camp minier de Matagami a vu le jour en 1956 lors de la découverte du dépôt de Mattagami Lake, un gisement volcanogène de 25.6 millions de tonnes. Depuis ce temps, un total de neuf gisements ont été exploités et un dixième, Bell Allard, est présentement en production. En date du 31 décembre 1999, la production historique du camp s?élevait à plus de 41 millions de tonnes. Cette présentation mettra l?accent sur la géologie des récentes découvertes dans le prolifique camp minier de Matagami. Les ressources publiées pour le dépôt Persévérance sont de 947,000 tonnes titrant 19.12% Zn, 1.37% Cu, 32 g/t Ag et 0.40 g/t Au. Deux autres découvertes, Équinoxe et Persévérance Ouest contibueront à la ressource globale. Les trois dépôts sont situés au niveau de la Tuffite Clef même si les roches sus-jacentes ne sont pas celles typiquement observées dans les autres dépôts du flanc sud. Ces découvertes sont le résultat d?un programme d?exploration ciblé et soutenu, démontrant ainsi la possibilité de découvrir de nouvelles ressources même dans les camps miniers comme Matagami qui ont été explorés intensivement depuis plus d?un demi-siècle.

May 1, 2001

By L. M. Ame, W. D. Harwood

"This paper outlines a management philosophy aimed at promoting employee involvement, quality and process improvement at Inco 's Thompson operations. It describes the use of statistical process control techniques, lessons learned and examples of progress.IntroductionThis paper provides an overview of the Manitoba Division's performance through the promotion of greater employee involvement, quality and process improvement. Having learned from other practitioners o f quality management, the Manitoba Division believes its experiences are applicable to all mining and other businesses.The Thompson operation consists of two underground mines, an open pit, a mill, a smelter and an electrolytic refinery. The workforce consists of 2000 members. The main products are electrolytic nickel slab and proprietary nickel rounds. Production levels are currently at capacity in response to heavy market demand.Paralleling much of the mining industry the corporation was faced with six years of decreasing nickel prices (Fig. I). Inco Limited survived by focusing on productivity and cost improvement. Manitoba Division productivity improved 32070 over three years beginning in 1982-the worst financial year in the company's history (Fig. 2). A real unit cost reduction of 20%, net of inflation, was also achieved (Fig . 3)."

Jan 1, 1990

By E. J. Harris

Data obtained from mine ventilation pressure and quantity surveys are required to accurately diagnose ventilation problems, project future air quantity needs, and to locate conditions adversely affecting the efficiency of a mine ventilation system. A method for making mine ventilation pressure surveys with aneroid altimeters was presented in Bureau of Mines Information Circular 7809, and a description of field calculation technique is presented. This report supplements Information Circular 7809 by developing the information obtained during a mine ventilation pressure survey into a single equation suitable, with appropriate modification, for use with desk-top calculators and digital computers. The equation can be used to calculate the ventilation pres sure from the base station to any underground station, or between any two underground stations, and can be programed for semiautomatic sequential calculation using a desk-top calculator. An example of application to a programed desk-top calculator is provided in the appendix.

Jan 1, 1973

"Nanisivik Mines Ltd. operates a 10-M W diesel-electric generating plant at its zinc-lead operation on Baffin Island in the Canadian Arctic. This paper provides a description of the plant and the integrated waste heat recovery system. Data is presented detailing the actual costs of operating a plant over a period of seven years. Problems in operation are described as well as the success of the plant in meeting its objectives over the years. IntroductionNanisivik is located on the shore of Strathcona Sound at the north end of Baffin Island (Fig. I). Nanisivik Mines Ltd. has operated a 2,100 tonne per day zinc-lead underground mine and a concentrator, together with supporting infrastructure, at this location since October 1976. Annual production of 100 000 tonnes of zinc and 10 000 tonnes of lead concentrate is transported by ship to Europe during the mid -July to mid October shipping season.All electrical needs of the project are provided by the company-owned and -operated power plant. Facilities served by this electrical system are the underground mining areas, the concentrator and industrial area, a townsite, airport, and shiploading dock complex."

Jan 1, 1986