Production of cement copper in the United States has been increasing during the past few years principally because more mine waste from open pit operations
The starters, generators, and alternators recovered in scrapping up to 7 million junk automobiles annually are a significant source of recyclable copper. At present, the
Where water is abundant, hydraulic mining of placer deposits is usually the least expensive extraction system. In the past, large volumes of water were required,
In recent years, Bureau of Mines projects under the sponsorship of the National Aeronautics and Space Administration (NASA) have explored various aspects of the problems
The Bureau of Mines has conducted extensive research to improve the extractive technology of gold and develop processes which may be applicable to refractory ores.
The preparation of ductile vanadium from vanadium carbide was investigated by the Bureau of Mines as a part of a research program on the extraction
For some time researchers have attempted to increase drilling efficiency by adding certain agents to the flushing medium. Much of this interest is the result
The Froth Flotation Process is about taking advantage of the natural hydrophobicity of liberated (well ground) minerals/metals and making/playing on making them hydrophobic (water-repel) individually
The Bureau of Mines is developing technology which will contribute to realizing the most effective use of recycled metals. Development of improved methods for the
This research was conducted as a part of a Bureau of Mines aim to promote more efficient use of mineral-based materials. The objective of the