Associated Minerals: Placer gold invariably is accompanied by other heavy minerals, which comprise the black, white, or yellow concentrates found in the sluice box when cleaning
Zirconium crucibles are rapidly becoming a standard piece of equipment, particularly in laboratories where fusions using strongly alkaline fluxes are common. This Center has found
Table of ContentsMethod AEquipment MaterialsMaterialsProcedureProcedure NotesMethod BEquipmentMaterialsProcedureProcedure Notes At times it may be necessary or desirable to dissolve a ferrochrome sample in acid rather than
Table of ContentsEquipmentMaterialsProcedureProcedure Notes Manganese commonly occurs in mineral chromite as an impurity, and the amount can range from trace quantities to a few percent.
Table of ContentsEquipmentMaterialsProcedureProcedure Notes Silica is present in chromite ores as a basic silicate. In characterization and beneficiation studies performed on chromites at this Center,
Calcium is rarely found in chromite ores in amounts greater than a few tenths of a percent, and calcium analysis is rarely requested on ore
Table of ContentsEquipmentMaterialsProcedureProcedure Notes Aluminum and magnesium occur as gangue components in chromite ores and ferrochrome slags. At this Center, ores from many different sites
Table of ContentsMaterialsProcedureProcedure Notes It would truly be unusual to find a sample of mineral chromite with metallic iron in it. However, (his Center has
Table of ContentsEquipmentMaterialsProcedureProcedure Notes The determination of ferrous iron in mineral chromites and other chromite-bearing samples is limited by the difficult solubility of the chromite
Table of ContentsEquipmentMaterialsProcedureProcedure Notes Iron is the second major element in chromite. In smelting operations where ferrochrome is the product, a specific range in the