gangue

• Hence the elimination of the worthless "gangue" by concentration of the iron particles associated with it, seemed to be the only solution of the problem Many attempts had been made in by-gone days to concentrate the iron in such ores by water processes, but with only a partial degree of success. —  Edison, His Life and Inventions
• In addition they are usually associated with large quantities of "dead" ore or a sort of gangue which must be discarded slag-like. —  IF September, 1952
• It is reported that the project covering 160 mu, will be divided into two phases to build 5 new wall material production lines of shale gangue sintering, producing various new-type construction materials replacing clay brick, with such characteristics as high intensity, high heat preservation, heat insulation and sound insulation. —  Chinalyst - China blogs in English
• The gangue is quartz, occasionally argillaceous and bituminous. —  Scientific American Supplement, No. 312, December 24, 1881
• The loss of potash and soda by volatilization and combination with the gangue is entirely avoided 4. —  Scientific American Supplement, No. 829, November 21, 1891

Used in the Same Context