https://wiki.sagmilling.com/index.php?action=history&feed=atom&title=Category%3ATestworkCategory:Testwork - Revision history2026-05-20T05:27:55ZRevision history for this page on the wikiMediaWiki 1.43.8https://wiki.sagmilling.com/index.php?title=Category:Testwork&diff=771&oldid=prevAlex Doll: Created page with "==Category:Testwork== Testwork normally means tests performed in a laboratory on samples of ore from a particular mineral deposit. There are several different tests that are ..."2015-03-28T22:53:06Z<p>Created page with "==Category:Testwork== Testwork normally means tests performed in a laboratory on samples of ore from a particular mineral deposit. There are several different tests that are ..."</p>
<p><b>New page</b></p><div>==Category:Testwork==<br />
Testwork normally means tests performed in a laboratory on samples of ore from a particular mineral deposit. There are several different tests that are used in the industry, and only the ones relevant to Power Models are used in the SAGMILLING.COM databases. <br />
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===Grouping tests by size class===<br />
Tests can normally be grouped based on the size class they are investigating, and there will normally be reasonably strong correlation between tests in the same size classes. <br />
* '''Coarse tests''' are the Bond impact crushing work index, the point load index and the unconfined compressive strength. The Minnovex CI (part of the SGS SPI™ protocol) often reflects the breakage of coarse sizes, even thought the specimens used aren't particularly coarse.<br />
* '''Medium tests''' are the Bond rod mill work index, SGI, and the drop weight tests (DWT). Other tests that aren't part of the database usually fit into this range; examples are SAGDesign and MacPherson tests.<br />
* '''Fine tests''' means exclusively the Bond ball mill work index test. The Morrell Mib value can be determined from the Bond results and it isn't considered a distinct test from the standpoint of the database.<br />
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===Grouping tests by type of apparatus===<br />
Another way to group tests is by the type of apparatus used in the test:<br />
* '''Drop Weight Tests''' are tests performed by vertically dropping a weight on a sample and measuring the resulting particle sizes. The JK Drop Weight Test and the SMC test are both classed as Drop Weight Tests.<br />
* '''Tumbling Tests''' are tests performed by tumbling sample in a rotating mill that contains some sort of media. The Bond rod mill and ball mill work index tests, SGI and Bond abrasion index tests are all Tumbling Tests.<br />
* '''Pendulum Tests''' are tests where a pendulum (usually a pair of pendulums) strikes the sample horizontally. The Bond impact crushing work index is an example of a Pendulum Test.</div>Alex Doll