- 行业: 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 mixture of producer gas and water gas obtained by passing steam and air over heated coal or coke in a Dowson producer.
Industry:Mining
A mixture of RDX and TNT that, when cast, has a density of 1.65 g/cm <sub>3</sub>and a velocity of 25,000 ft/s (7.6 km/s). It is useful as a primer for blasting agents.
Industry:Mining
A mixture of refractory materials, either raw or calcined, to which other materials not classified as refractory materials have been added for the purpose of increasing the plasticity, giving air-setting properties, and lowering the temperature at which the bond develops.
Industry:Mining
A mixture of resins, ingredients, and fillers before processing into the finished product.
Industry:Mining
A mixture of spinel, corundum, and magnetite, the corundum being present in variable proportions. It is a heavy, black, fine-grained aggregate. Dark gray crystals of corundum appear in the best varieties.
Industry:Mining
A mixture of the low-molecular-weight paraffin series hydrocarbons methane, ethane, propane, and butane, with small amounts of higher hydrocarbons; also frequently containing small or large proportions of nitrogen, carbon dioxide, and hydrogen sulfide, and occasionally small proportions of helium. Methane is almost always the major constituent. Natural gas accompanying petroleum always contains appreciable quantities of ethane, propane, butane, as well as some pentane and hexane vapors, and is known as wet gas. Dry gas contains little of these higher hydrocarbons. The exact composition of natural gas varies with locality. The heating value of natural gas is usually over 1,000 Btu/ft<sub>3</sub>unless nitrogen or carbon dioxide are important components of the gas.
Industry:Mining
