Cement copper production in the United States has increased during the past few years, principally because more submill-grade material from open-pit operations is being leached
Considerable amounts of the world’s known reserves of elemental sulfur are found near the surface in areas of volcanic activity both active and inactive. Because
In January of 1964, the Board commenced a vigorous program using appropriated funds and funds donated by the coal industry to finance a research program
The language concerning ventilation in many sections of the Act could very well deprive or limit the mining engineer in planning the ventilation for new
Bacterial attack of sulfide minerals has been going on for centuries but only recently was it discovered that the acid and iron often found in
One of the problems facing both the designer and the user of magnetic separators is the evaluation of the body forces acting on particles in
In late 1965 General Mills announced the availability of a new liquid ion exchange reagent LIX-64, for the recovery of copper from various solutions, such
The occurrence of acid mine drainage (AMD) with coal mining has been well documented. Less documentation is available of its association with other types of
A series of tests were run on fresh Becker drill samples from a drill hole in Kennecott’s Chino “J” dump, near Silver City, New Mexico,
Leaching of waste material at Kennecott’s Chino Mines Division at Santa Rita, New Mexico, has been accompanied by increasing difficulty in circulating leach solutions through