The two principal attributes of a thickener pulp are its settling rate and the ultimate pulp density of the thickened mud. Testing for evaluation of
Deep Well turbine pumps receive constantly increasing application to the problem of mining water and other fluids from great depths. Many installations of medium settings
The recovery of copper from low-grade oxidized and mixed oxide-sulfide copper ores by acid leaching is standard practice in the Southwest. Some ores, however, are
The equipment for the separation of the rare earths consists of nearly 200 columns thirty inches in diameter by twenty feet high. They are constructed
The past 15 years have seen rapid advances in the metallurgy of materials for drill machinery and bits, but rock drilling itself continues to be
Subsequent to the work of A. Vita in 1920, a number of investigators have published data dealing with the rapid determination of sulfur in coal
In 1955, the Ideal Cement Company decided to increase the production at its Ada, Oklahoma operations. After many studies it was decided to build a
The largest use of aggregates is for highway construction. Furthermore, the majority of sales for other than highway uses is dependent upon compliance with state
Commonly accepted maintenance methods are being outdated by the rapid acceptance and use of more complicated hydraulic circuitry on modern mining equipment. It is no
While coal production over the past 25 or 30 years has been on a horizontal plane, coal’s share of the total energy market has declined.