5 Terms
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Mineral mining
The extraction of valuable minerals or other geological materials from the earth for economic interests.
Industry: Mining
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Mineral mining
hot-carbonate process
Mining; General mining
A process developed by the U.S. Bureau of Mines in which a hot solution of potassium carbonate is used to absorb impurities from gases and is then regenerated for reuse in a continuous cycle with ...
hotpotash process
Mining; General mining
A process developed by the U.S. Bureau of Mines in which a hot solution of potassium carbonate is used to absorb impurities from gases and is then regenerated for reuse in a continuous cycle with ...
Benfield process
Mining; General mining
A process developed by the U.S. Bureau of Mines in which a hot solution of potassium carbonate is used to absorb impurities from gases and is then regenerated for reuse in a continuous cycle with ...
Sturzelberger iron reduction process
Mining; General mining
A process evolved for dealing with pyrite roasting residues rich in zinc (8% to 10%). The direct reduction takes place in a short rotary drum that has a rammed tar-dolomite lining. Lime is added to ...
Copaux-Kawecki fluoride process
Mining; General mining
A process for converting beryl to beryllium oxide by sintering a mixture of beryl, soda ash, sodium silicofluoride, and sodium ferric fluoride, leaching with hot water, and adding caustic soda to ...
Sawyear-Kjellgren process
Mining; General mining
A process for converting beryl to beryllium oxide, based on quenching the melted beryl in cold water. The resultant frit reacts with concentrated sulfuric acid, and is steamed and agitated. The ...
Bethell's process
Mining; General mining
A process for creosoting timber (such as track sleepers) to extend its useful life. The timber is first dried, then placed in a cylinder and subjected to partial vacuum, and finally impregnated with ...
