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The Effect of Silver on the chlorination and Brornination of Gold
By H. O. Hofman
WHEN dry chlorine gas is made to act in the cold upon finely¬divided gold,' it converts the latter with evolution of heat into auro-auric chloride, Au2CI4, a hard, dark-red, hygroscopic salt. Moi
Mar 1, 1905
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Silver in Canada in International Perspective
By J. G. George
A brief review of the silver industry is presented to set the stage for the analysis of the distribution of silver production by source from various types of mines in Canada and of the changing relati
Jan 1, 1977
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Improving Fragmentation During Ring-Hole Blasting in Coal in Blasting Gallery Panels
By Sri Sawmliana, P. Pal Roy
Blasting Gallery (BG) method was introduced in India for higher production and low cost of excavation to substitute conventional hand section and stowing methods for thick coal seam. The Singareni Col
Jan 1, 2003
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New bearing application for pinion gear drives on mine hoists
By R. A. McIvor, R. Levac
"The Stobie No. 7 shaft, 14 ft diameter, double- drum skip hoist, was installed at the INCO Limited Frood Stobie Complex in 1942. Figure 1 shows the hoist layout. The hoist was originally equipped wit
Jan 1, 2001
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Mining At Aspen
By Bruce Bryant
Silver ore was discovered at Aspen in 1879, but the district did not reach full production until 1888 after lawsuits were settled and railroads furnished less expensive transportation to the outside w
Jan 1, 1982
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Coal Division - Elements In Coal And Potential Environmental Concerns Arising From These Elements
The Environmental Session will consist of five papers dealing with various aspects of trace elements associated with coal. Analytical procedures to determine the amounts of trace elements will be disc
Jan 1, 1979
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Chapter 10. Definitions
By Karl J. C. Harries
"10.1. INTRODUCTIONDefinitions are a necessary part of every agreement. Their purposes are to assist the reader in reading and understanding an agreement and to attempt to avert potential confusion an
Jan 1, 2003
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Carvão Vegetal Como Aditivo Para Coqueificação: Estudo Da Reatividade Ao Co2
By Bruno Deves Flores
O presente trabalho tem como objetivo investigar a influência da adição de carvão vegetal e do seu tamanho de partícula na reatividade do coque. Para isso, um carvão vegetal de eucalipto foi adicionad
Aug 1, 2018
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Synthetic Zeolites: Properties And Applications ? Introduction
By Donald W. Breck
Zeolites were first recognized as a new group of minerals by Cronstedt with the discovery of stilbite in 1756. The word zeolite was coined from the two Greek words meaning "to boil" and "a stone" beca
Jan 1, 1973
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Mineral Commodity Summaries 1996 - Significant Events, Trends, And Issues - The Mineral Sector Of The U.S. Economy
The U.S. economy and, consequently, the demand for minerals grew at more moderate rates in 1995 compared with stronger performances the previous year. Demand for metals such as steel and copper was re
Jan 1, 1996
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Longwall Mining In America (f89fdb53-aac0-4b35-861d-c15df395bb25)
By Joseph Kuti
Longwall mining is the term used for the underground extraction of a wide and deep panel of coal. Such a panel may be blocked out by one or more entries on either side ("head" and "tail") of a longwal
Jan 1, 1978
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IC 6807 Petroleum Refineries, Including Cracking Plants, In The United States January 1, 1934 ? Introductory Summary
By G. R. Hopkins
According to reports received by the Bureau of Mines, Department of the Interior, as of January 1, 1934, there were 591 completed refineries in the United States, an increase of 86 ever the total repo
Jan 1, 1934
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Mineral Commodity Summaries 1995 - Significant Events, Trends, And Issues - The Mineral Sector Of The U.S. Economy
A stronger U.S. economy stimulated the domestic mineral sector in 1994. Metals demand was spurred by robust U.S. motor vehicle sales, while demand for major industrial minerals rose in response to hig
Jan 1, 1995
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RI 2669 Status of Research in Ore Dressing
By Ernest A. Hersam
"INTRODUCTION.Luring the year 1923 a complete survey was made of the condition of research in the reduction (milling) and concentration of ores and nonmetallic minerals - that is, up to the stage wher
Mar 1, 1925
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Cyanide: Just The Facts
By Courtney A. Young
Cyanide is a fast-acting, highly toxic substance but, at the same time, is deemed essential for sustaining life as well 'as our standard of living. In this manuscript, the facts about cyanide are
Jan 1, 1998
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Vitrification of Municipal Waste Combustor Residues: Physical and Chemical Properties of Electric Arc Furnace Feed and Products
By William K. Connor, O&apos
The U.S. Bureau of Mines (USBM), in cooperation with the American Society of Mechanical Engineers (ASME), conducted over 200 hours of melting tests to vitrify residues from five municipal waste combus
Jan 1, 1991
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The IPMI Journal 2020
By IPMI Educational and Scientific Foundation
It is with great pleasure that we announce the availability of this fourth issue of the IPMI Journal, a publication of the International Precious Metals Educational and Scientific Foundation. This dig
Dec 1, 2020
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Future Raw Material Needs of The Canadian Steel Industry Some Problems and Opportunities
By R. J. Goodman, P. Lafleur
This paper presents a current interpretation and projections of recent statistics on raw materials availability based on familiarity with the Canadian steel industry and its development. Problems and
Jan 1, 1976
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Coal-Mine Accidents In The United States 1939 - Introduction
By W. W. Adams
Coal mining in the United States established a good safety record in 1939. The death and injury rates per man-hour of exposure to risk were favorable compared with most previous years, and the number
Jan 1, 1942
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RI 8948 - Analysis of Sampling Variance From Certain Platinum and Palladium Deposits in Alaska
By James C. Barker
The analytical variability encountered when sampling for platinum-group metals (PGM) was statistically evaluated during a 1983 study by the Bureau of Mines and the University of Alaska. Sampling proce
Jan 1, 1985