Search Documents
Search Again
Search Again
Refine Search
Refine Search
-
Preliminary Production Report From the Bureau of Mines
A record $18.7 billion worth of metals, non- metals and fuels was produced in the U.S. during 1962, according to a year-end estimate from the USBM. The 1962 total value, based on preliminary statistic
Jan 2, 1963
-
Minerals Beneficiation - Belt Conveyor Power Studies
By A. W. Asman
The problem of balanced design in a belt conveyor has been under constant study. Increased use of this method of transport in recent years has stimulated investigations. Conveyor belt, power transmiss
Jan 1, 1961
-
Institute of Metals Division - The Measurement of the Tetragonality of Ferrous Martensite (TN)
By F. W. Schaller
TETRAGONALITY is an important aspect of the models of transformation, strengthening, and tempering of ferrous martensite. When the c/a
Jan 1, 1963
-
Coal - Crushing ofAnthracite for Reductionof Domestic to Steam Sizes
By P. D. Rao, H. B. Charmbury, D. R. Mitchell
As a result of a changing market pattern for anthracite, there is now an increasing demand for steam size and a decreasing demand for domestic sizes. To help the producer meet this new demand, the aut
Jan 1, 1961
-
Papers - Production - Domestic - Developments in California Oil Industry during 1940
By V. H. Whihelm
Since 1935 California has enjoyed a remarkable cycle of discovery, which has placed the state in a very satisfactory position in regard to oil reserves. Most ol the geophysical plays have been drilled
Jan 1, 1941
-
Papers - Production - Domestic - Developments in California Oil Industry during 1940
By V. H. Whihelm
Since 1935 California has enjoyed a remarkable cycle of discovery, which has placed the state in a very satisfactory position in regard to oil reserves. Most ol the geophysical plays have been drilled
Jan 1, 1941
-
Boron and Borates
By Robert B. Kistler, Ward C. Smith
The borate industry is one of the few sectors of the mining and mineral-processing industry which the United States still dominates. Since about 1927, the United States has supplied over half of the w
Jan 1, 1975
-
Part IX - Papers - Prediction of Extrusion Pressures in the Cold Forging of Steel
By L. J. Kashar
By means of a continuum-mechanics approach, the following equation for calculuting the pressure for axisymmetric cold forging has been derived: where P is the extrusion pressure; K and n are the st
Jan 1, 1968
-
Minerals Beneficiation - Applications of Hydrocyclones and Sieve Bends in Wet Treatment of Coal, Minerals and Mineral Products
By H. H. Dreissen, F. J. Fontein
The operating principle of the classifying cyclone has been described often but some special aspects of the cyclone receive further clarification here. In addition, several uses of the classifiers ar
Jan 1, 1963
-
Rock Mechanics Studies In A Mechanized Longwall Coal Mine
By Paul H. Lu
Methods and results of measuring three basic parameters for ground stability control, ground pressure, strata movement, and geomechanical properties of mine rock are presented in this paper. It is fou
Jan 1, 1984
-
Institute of Metals Division - Increased Martensite Formation Temperature in Thin Films (TN)
By H. Warlimont
In recent investigations of the microstructure and crystallographic features of martensite by electgon microscopy,', '9 thin films (about 50 to l000A in thickness) have been used as specimen
Jan 1, 1962
-
Phase Changes During Aging Of Zinc-Alloy Die Castings, II - Changes In The Solid Solution Of Aluminum In Zinc And Their Relation To Dimensional Changes
By R. L. Wilcox, M. L. Fuller
MOST commercial alloys undergo changes in phase composition after casting. This is a natural result of the fact that the alloys are not in a state of phase equilibrium as cast and phase changes will t
Jan 1, 1935
-
An Investigation to Develop Hard Alloys of Silver for Lining Ring Grooves of Light Alloy Pistons
By Claus Goetzel
THE object of this investigation was to determine whether silver alloys could be used instead of the currently employed insert of high-expansion AVERAGE COEFFICIENT PER DE G. C. OVEN RANGE 20° To 2
Jan 1, 1937
-
Producing – Equipment, Methods and Materials - The Skin Effect in Producing Wells
By E. B. Brauer, W. Hurst, J. D. Clark
Because of drilling, completion, and workover practices, the permeability around a wellbore generally is different from the permeability of the formation. The zone with the altered permeability is cal
Jan 1, 1970
-
Institute of Metals Division - Comparison of Tensile Strength Measured in Tension and Bending (TN)
By A. G. Rozner
TRANSVERSE rupture tests have been commonly used in mechanical investigations of brittle materials. The specimens are simple, easy to prepare, and loading presents no difficulty. Owing to the complexi
Jan 1, 1965
-
Secondary Recovery - Reservoir Heating by Hot Fluid Injection
By J. C. Martin
Stmplified equations are developed for the flow of fluids in gas drive reservoirs in which the effects of gravity can be neglected. The results show that the pressure distribution is governed by a non
-
Selection Of Motors - Drive Trains- Electrical Circuitry For Comminution Circuits
By M. N. Brodie, John Chapman
INTRODUCTION - DEFINITION & HISTORICAL PERSPECTIVE While this symposium is concerned with comminution which, by definition, relates to all stages of size reduction of an ore body to a form suitabl
Jan 1, 1982
-
Technical Notes - Improved Methods for Measuring Aeration in Flotation Cells
By J. B. Gayle
PRESENT flotation processes depend almost entirely on the buoyant properties of air bubbles to effect separations of mineral and gangue, but there is no convenient method for measuring aeration in flo
Jan 1, 1959
-
Quantitative Methods, Computers, Reconnaissance Geology And Economics In The Appraisal Of Mineral Potential
By D. P. Harris
This paper examines recent developments and work in progress on the application of quantitative methods and computers to the appraisal of the mineral resource potential of discrete areas by employing
Jan 1, 1969
-
Reservoir Engineering - General - Control of Injection Gas Composition in Enriched Gas-Drive Proj...
By J. Jones-Parra, R. S. Reytor
The porosities of fractured limestone reservoirs can be divided into two broad types in accordance with their effects on fluid distribution and fluid flow. In the coarse porosity, gravity segregation