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United States Bureau of Mines
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 ...
Fireclay pot for melting glass--open at the top.
Industry:Mining
Fire-resisting paper bag, about 8 in (20.3 cm) long, filled with dry sand for stemming shotholes in coal or hard headings. See: water-ampul stemming
Industry:Mining
Firing blasts from a mains supply.
Industry:Mining
Firing electrically with delay blasting caps in a number of holes at one time.
Industry:Mining
Firm compact clay; brick clay. Also spelled galt, golt.
Industry:Mining
Five compounds have been reported: Mo<sub>2</sub>B , melting point, 2,120 degrees C, and sp gr, 9.3; Mo<sub>3</sub>B<sub>2</sub>, dissociates at 2,250 degrees C; MoB, exists in two crystalline forms: alpha MoB, melting point, 2,350 degrees C, sp gr, 8.8; and beta MoB, melting point, 2,180 degrees C, sp gr, 8.4; Mo<sub>2</sub>B<sub>5</sub>, dissociates at approx. 1,600 degrees C, sp gr, 7.5; and MoB<sub>2</sub>, melting point, 2,100 degrees C, sp gr, 7.8, and thermal expansion, 7.7 x 10<sub>-6</sub>.
Industry:Mining
Flat rocks on which clothes were beetled (stamped or pounded).
Industry:Mining
Flat screen or trommel on which passing ore is exposed to sprays or jets of water to remove as undersize any adherent mud or other fine material.
Industry:Mining
Flat stope advanced (overhand if deposit is inclined) in slanted steps, each flat forming a separate working place.
Industry:Mining
Flat strut that sometimes is used instead of an arch on the bottom of a tunnel cross section.
Industry:Mining