The knowledge of particle size distributions is a critical factor in the monitoring, control and optimization of many processes. This is particularly true of the
From May 1951 to March 1967, the Bureau of Mines, as part of its iron and steelmaking research program, operated a series of experimental blast
The recovery and recycling of metals from process wastes is a major research effort of the Bureau of Mines. The present work was undertaken by
Design engineers involved with mine or tunnel construction require knowledge of rock behavior in order to assure economic excavation of rock and stability of underground
In the commercial electrowinning of zinc, zinc oxide is leached from the roasted calcine with an aqueous acid sulfate electrolyte. The zinc-rich solution is purified
The profitable operation of a coal preparation plant under today’s stringent product standards and ever-rising labor, material, energy, and equipment costs requires that the preparation
One of the goals is to minimize the requirements for critical and strategic mineral commodities through conservation and substitution. As a part of this effort,
As a part of the Bureau of Mines research program to develop new mining methods for underground bedded deposits, a rock splitting tool capable of
Chromium is essential to modern industry, and there are few acceptable substitutes for most of its metallurgical and chemical applications. In 1979 the United States
The iron oxide pelletizing industry is very energy intensive and relies heavily on natural gas to fire pellet-indurating furnaces. Approximately 75 million long tons of