- Отрасли: 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 ...
A furnace, the hearth of which consists of terraces rising from the outer edge to the center. The hearth is circular and revolves when in operation.
Industry:Mining
A furnace, with a shallow hearth, usually non-regenerative, having a roof that deflects the flame and radiates heat toward the hearth or the surface of the charge. Firing may be with coal, pulverized coal, oil, or gas. Two of the most important types are the openhearth steel furnaces and the large reverberatories employed in copper smelting.
Industry:Mining
A fuse composed of an explosive core within a textile or plastic covering. It detonates every explosive that is in direct contact with it.
Industry:Mining
A fuse consisting of high explosive that fires the charge without the assistance of any other detonator. It consists of a high-explosive core of pentaerythritol tetranitrate (PETN) enclosed in tape and wrapped with textile countering yarns. Usually, this fuse is then reinforced or completely enclosed in a strong waterproof plastic outer cover. The finished external diameter is normally about 0.2 in (5 mm). Primacord is the best known brand.
Industry:Mining
A fuse enclosed in an insulating tube in order to confine the arc when the fuse blows.
Industry:Mining
A fuse lighter similar to a Fourth-of-July sparkler, that burns for 2-1/2 min, sufficient time to light 30 to 50 fuses. The lead splitter is a lead tube of diameter about 1/8 in (3.2 mm) in filled with a slow-burning powder that burns at the rate of 36 s/ft (118 s/m) with a hot splitting flame.
Industry:Mining
A fused mass of synthetic material up to 5 cm long, pear or carrot-shaped, particularly as produced by the Verneuil or Crochralshi processes in the production of synthetic sapphire, ruby, spinel, or rutile. Etymol: Fr. "ball."
Industry:Mining
