- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
An improperly placed or overcharged shot of black blasting powder in coal (where used), frequently results in a mine explosion.
Industry:Mining
An improved centrifugal-type mine fan. The vanes, of aerofoil section, are curved backward from the direction of rotation. This fan is popular in British coal mines, and total efficiencies of about 90% have been obtained.
Industry:Mining
An improved cycle and system of operation to achieve rapid advance and continuous operation in low-drillability rock.
Industry:Mining
An improved form of the Chenot process for making sponge iron by heating crushed iron oxide and coal in retorts.
Industry:Mining
An improved liquid oxygen breathing apparatus, weighing 33 lb (15 kg) and approved for use in British mines. Air is fed to the wearer at a temperature of 50 degrees F (10 degrees C) rising to 70 degrees F (21.1 degrees C) in just over 1/2 h and is still only 80 degrees F (26.7 degrees C) after 2-1/2 h.
Industry:Mining
An improved maletra furnace provided with automatic rakes.
Industry:Mining
An improved type of kep in which the kep shoes are withdrawn without previously raising the cage and thus reducing the decking time. The operation may be automatic, except for cage release, because the arrangement allows the kep shoes to trip without the position of the hand lever being altered.
Industry:Mining
An improvement of the Bessemer process in which, by the use of a basic lining in the converter and by the addition of basic materials during the blow, it is possible to eliminate phosphorus from the pig iron and keep it out of the steel.
Industry:Mining
An impulse water turbine with buckets bolted to its periphery, which are struck by a high velocity jet of water. This turbine is most efficient under a head of from 900 to 1,000 ft (274 to 305 m) or more.
Industry:Mining
