Free-milling sentence example

free-milling
  • The process is rarely applied to ores direct; free-milling ores are generally amalgamated, and the tailings and slimes, after concentration, operated upon.
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  • It is best adapted for free-milling ores, especially after the bulk of the gold has been removed by amalgamation.
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  • A silver ore is either free-milling or refractory, that is, the silver mineral is readily amalgamated or it is not.
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  • In free-milling ore the silver is present either in the native state, or as chloride or as simple sulphide.
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  • The yield in silver is low unless the ores are exceptionally free-milling; the bullion produced is high-grade, as refractory silver minerals are hardly attacked.
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  • The average annual product of India for the period 1886 to 1899 inclusive was £698,208, and its present annual product averages about 550,000 oz., or about £2,200,000, obtained almost wholly from the free-milling quartz veins of the Colar goldfields in Mysore, southern India.
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