In recent years, more than 99 percent of the domestic mica produced has been scrap and flake mica (mica which does not meet specifications for
The high reactivity of chlorine as an oxidizing agent in leaching ore has long been recognized, but chlorine has not been extensively used because of
Cementation of copper onto iron is a historically old process for recovery of copper from leach solutions. Although about 13 percent of the Nation’s primary
The activity of rare-earth compounds for catalysis of the hydrogen-oxygen reaction is of interest because of their possible use for electrocatalysis of the cathode reaction
This report is a sequel to earlier Bureau of Mines investigations which indicated the need for a seepage environmental research investigation relative to the slime
The Calico mining district in California contains extensive deposits of low-grade silver ore. The deposits cover a large area and constitute an important silver reserve
Mining companies have been confronted with a multitude of production problems in their endeavors to extract maximum quantities of ore at minimal costs. These problems
The minerals industry in the field of Underground Mine Design is presently faced with the problem of meeting a rapidly increasing domestic and foreign demand
Mines are recycling more water than ever before. This is a logical response to water stresses (see our article on Water Balances). However, there is
The reconnaissance-level investigations were carried out to gather supplemental data to the in-depth studies of Kennecott’ s Magna and Phelps Dodge’s Morenci tailings deposits and