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Transactions of the Royal Canadian Institute, Vol. 12, Part 1, 1919, includes "The Reign of Law," by Dr. J. Murray Clark; "The Northern Interior of British Columbia and its Maps," by Rev. A. G. Morice, 0. M. I., M. A.; "Educational Reform: its Relation to a Solution of the Industrial Deadlock," by C. G. Corless, M. Sc. (McGill); "The Growth of the Scales on Fishes," by A. G. Huntsman, B. A., M. B.; "Intellectual Consequences of the War," by Franklin H. Giddings, Ph. D., LL. D., and "Industrial Research," by F.. B. Jewett, Ph. D."

Jan 7, 1919

By Yoshitaka Mitsuda, Masao Miyake, Masafumi Maeda

A leaching treatment was investigated to recover metals including rare earths from the mixtures of hydrogen storage alloys and nickel hydroxide. A potential-pH diagram of the La-Ni-H20 system including the domain of stability of LaNi5 was drawn to find appropriate leaching conditions. Alkaline solutions containing ligands that form complexes with nickel ions were supposed to be available to separate hydrogen storage alloys from the mixture. When the mixture was leached with ammoniacal alkaline aqueous solutions, the nickel hydroxide was dissolved and the hydrogen storage alloy was recovered as its original alloy.

Jan 1, 2004

The University of Idaho Mining Society held a meeting on Oct. 23, and elected the following officers: President, Sam Bloom; Vice-President, Lloyd McDougall; Secty Treas, Jess W. Wade. Regular meetings are held on the first and third .Tuesdays of each month, for informal lectures and reports on technical subjects. The Mining Club of the University of Wisconsin has held four recent meetings On Oct. 17, sixteen new members were inducted, and a committee was appointed to buy a Liberty Bond. The second meeting, Oct. 31, was devoted to general entertainment, at the home of Professor McCaffery.

Jan 1, 1918

By Alfred E. Hunt

By the death of Joseph Dame Weeks, past-President of this Institute, which occurred December 26, 1896, the world has lost an earnest and unwearied philanthropist; the Christian church, a zealous, active and consistent representative; the United States and the State of Penusylvania, a patriotic, pub-

Jan 1, 1898

By George Hope, Jacques McMullen

Recent process advances at Lac Minerals Est Malartic Division are discussed. The Est Malartic mill treats massive sulphide, copper/gold ore from the Bousquet 2 mine, to produce a gravity gold product, a copper flotation concentrate and a gold precipitate. The mill operation has been improved by the application ofKnelson concentrators to replace jigs, the application of Outukumpu high grade tank cells and optimizing the cyanide leach to minimize cyanide consumption.

Jan 1, 1993

By T. Egleston

IF we may characterize the aim of metallurgists twenty years ago by any one point towards which their efforts were especially directed, we should say it was the idea of adapting '' waste products" to some useful purpose, while the energy of to-day seems rather to take the direction of so arranging processes as to have no "waste products." The iron-master of this decade no longer speaks of the waste gases

By T. Prof. Egleston

IF we may characterize the aim of metallurgists twenty years ago by any one point towards which their efforts were especially directed, we should say it was the idea of adapting "waste products" to some useful purpose, while the energy of to-day seems rather to take the direction of so arranging processes as to have no " waste products." The iron-master of this decade no longer speaks of the waste gases

Jan 1, 1873

By James P. Rider, Jay F. Colinet

The National Institute for Occupational Safety and Health (NIOSH) has conducted benchmarking surveys at longwall operations across the country to identify current operating practices and the types of controls being used. Gravimetric and instantaneous dust sampling was completed to quantify dust generation from major sources and determine the relative effectiveness of the different control technologies. Results from the underground dust surveys will be presented as an update on longwall dust control technology and operating practices.

By M. G. Karfakis, K. P. Chong

Determination of fracture toughness using the semi-circular specimen, the chevron edge notch round specimen, the short rod specimen and the cylindrical burst specimen, are critically reviewed. These methods, among all, are the most applicable for fracture toughness determination of rocks. They require minimum machining. Samples are small, and testing procedures are simple. They have a sound analytical basis and allow the fracture toughness to be determined without measurement of fracture length.

Jan 1, 1986

By T. I. Arbuzova

The present work presents the original data concerning using a high pressure torsion method and a shock wave loading technique to produce compact oxide nanomaterials and investigations of the effect of severe plastic deformation on a microstructure, crystal lattice and stability of these compounds. This allowed us to compare two ways of deformation action that can be characterized as quasi-static and dynamic effect, correspondingly. Particular attention was paid to a stoichiometry and surface composition changes upon severe plastic deformations. A procedure for studying chemistry of the oxide nanomaterials by means of nuclear microanalysis and Rutherford back scattering has been worked through. For surface studies the X-ray photoelectron spectroscopy has been used. It was shown that both distortion methods permit to produce massive nano-scale oxide materials from the coarse-grained powder during a single technological cycle. Bulk nanocrystalline materials based on LaMnO3, TiOy and ZrO2:Y2O3 were obtained by the quasi-static deformation technique. Nanoscaled ceramics of CuO, Mn3O4 and LaMnO3 were produced by the dynamic deformations. The density of the nanoceramics comes to 99%. Size effects and specific imperfection of the nanoceramics obtained lead to a set of particularities of physical properties.

Jan 1, 2006

By Miguel Ángel Zúñiga Castillo

El presente texto señala la importancia del transporte minero como actividad en el sistema de costeo. En ese sentido, este se divide en transporte al interior de la mina y al exterior de ella. El primero implica que el mineral sea transportado in situ hasta la tolva de la planta de beneficio, donde no hay una etapa de transformación o concentración, mientras que el segundo traslada los concentrados hasta su destino final como son las fundiciones y refinerías en el mercado europeo, asiático y americano. Por ello, se busca seleccionar la mejor etapa de transporte que responda a las condiciones de las máquinas y equipos que trasladen el mineral desde el interior a la superficie de la mina. Así también se realiza un análisis macroeconómico de la importancia del flete en la actividad minera, originando un perfil de ahorro en la generación de divisas para el fortalecimiento del rol minero en el país.

Nov 24, 1986

By M. Misra, I. Anazia

The effects of the enzyme, peroxidase, on the sedimentation and consolidation characteristics of Florida phosphate slimes were investigated. Results indicate that pretreatment with the enzyme was beneficial for slime dewatering and consolidation. Biological activity, resulting from slime pretreatment with the enzyme, induced higher mechanical binding between slime particles.

Jan 1, 1990

By Yang Cui

The partition ratios of lead and antimony between liquid copper and MgO saturated Cu2O-CaO-SiO2 flux and their removal rate by using CuCl-based flux were measured between 1423 K and 1573 K. For Cu2O-CaO-MgOsatd. system, the partition ratio of Pb was not affected by the CaO content at 1573 K, while that of Sb increased with increasing CaO content. The maximum value was 160 at the CaO content of 15.4 mass%. For Cu2O-CaO-SiO2-MgOsatd. system, two liquid phases of calcium silicate rich phase and Cu2O rich phase were observed at 1573 K. The partition ratios of Pb and Sb between calcium silicate phase and liquid copper depended on the (mass%CaO)/(mass%SiO2) ratio. When the (mass%CaO)/(mass%SiO2) ratio increased, the partition ratio of Pb decreased and that of Sb increased. For CuCl flux, the removal of Pb from liquid copper at 1473 K was possible, and a relatively low concentration could be reached. Moreover, most of lead as metal chloride vaporized from flux. For the removal of antimony from liquid copper at 1423 K, it was difficult by CuCl flux, and the removal ratio was approximately 20% for 75 minutes. However, the addition of CaO or Na2CO3 to CuCl flux was relatively effective to remove antimony, and the concentration of antimony reached a relatively low value after 15 minutes by using CuCl-CaO or CuCl-Na2CO3fluxes. Moreover, a small part of antimony as chloride vaporized from flux.

Jan 1, 2006

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May 1, 2003

By Carlos Agreda

The rock blasting environmental impacts such as: flyrock, groud vibrations,airblast,and/or noise, dust and fumes are identified and mentioned. Some comments on the correction factors that might be taken into consideration to calculate the initial velocity and the maximum projection of the rock fragments are mentioned as well.

Jan 1, 1995

By Jim Simpson, John Waller, Scott Stewart

The authors review the evolution of drilling and blasting procedures at this West Virginia surface coal mine where management seeks continually to improve and update the drilling and blasting programs. Today's operations require efficient programs which include quality control to maximize production and minimize the public's sensitivity to the blasting events.

Jan 1, 1992

By I. Petropouleas, J. Croll, R. Bassett

A programme of tests on controlled internal explosions to a class of circular reinforced concrete columns, has allowed the relationships between the blast energy and the extent of local damage to be understood. These tests have also demonstrated the important additional effects on the damage levels of preexisting axial loads.

Jan 1, 2006

By S. Lin, Y. J. Wang

Through an example three fan ventilation network concepts of subsystem solution and characteristic curves of a multiple fan ventilation system are introduced. The major steps of defining a subsystem, working out the subsystem equations, constructing a solution curve and a characteristic curve, and determining the operating points of the reference fan and the ventilation system are systematically demonstrated through three and two-dimensional curves. Also briefly discussed are the main features of a subsystem characteristic curve.

Jan 1, 1993

By L. J. Laughlin

The majority of non-drive conveyor pulleys use rotating shafts, and typical idler rolls use non-rotating shafts, even though both products are used to support and guide the conveyor belt and its load. This paper will explore and compare the requirements for rotating and non-rotating shaft designs and the impact of that design on the product. Additionally, it will explore how the “roller” bearing types (deep groove ball, tapered, or spherical) affect these designs.

Jan 1, 2003

By J R. Hearst, T R. Butkovich

Explosive-induced fracturing and permeability enhancement far from a free face were studied. A one-dimensional computer program, SOC, was used to predict the total failure-associated distortional strain, ef. Laboratory and field experiments associated the calculated ef with the observed fracture and permeability enhancement. An ef value of 0.015 corresponded to the observed radius of effect, which was about seven times the cavity radius and was consistent with predictions from SOC and from the literature.

Jan 1, 1976