Hardness

Mineral Hardness Kit

A Mineral Hardness Kit is made up of reference rocks and mineral samples and a scratching tool.  Test Kits will often contain with (9) specimens: gypsum, talc, calcite, fluorite, apatite, orthoclase, quartz, topaz and corundum.  Use will use a nail or scratching tool to see if you can scratch any of the minerals in the box you purchased.  Based

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What Ore Testing is Required For Mill Selection

Beginners might ask what grinding test data is required in order to properly size a grinding mill. After the grind requirements are established, testing for the selec­tion of comminution circuits and mill size can be initiated and can include the following:

  • Primary Autogenous Media Competency
  • Primary Autogenous and Semi-Autogenous Pilot Plant
  • Secondary Autogenous (Pebble) Testing
  • Impact Crushing – Bond Work Index
  • Rod Mill Grindability – Bond Work Index
  • Ball Mill Grindability – Bond Work Index
  • Abrasion Index
  • Crushing, Grinding and Concentration Pilot Plant

SAG & AG Mills can be sized according to any of the most appropriate methods of rock

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