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- The dressing or processing of coal or ores for the purpose of (1) regulating the size of a desired product, (2) removing unwanted constituents, and (3) improving the quality, purity, or assay grade of a desired product.
- Concentration or other preparation of coal or ores for smelting by drying, flotation, or magnetic separation.
- Improvement of the grade of coal or ores by milling, flotation, sintering, gravity concentration, or other processes.
Source: Dictionary of Mining, Mineral, and Related Terms
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