{"batchcomplete":"","continue":{"lecontinue":"20240719225026|1312","continue":"-||"},"query":{"logevents":[{"logid":1322,"ns":0,"title":"Pebble crushing or not","pageid":246,"logpage":246,"revid":1545,"params":{},"type":"create","action":"create","user":"Alex Doll","timestamp":"2026-05-25T20:45:33Z","comment":"Created page with \"== Pebble Crushing, or not ==  The choice of adding a pebble crusher to a circuit requires balancing the following: * the ratio of rod mill to ball mill work index values * the desired transfer size of the grinding circuit (what is the model running at) * energy efficiency of the grinding circuit  === Ratio of work indices === If the rod mill (and crushing work index, to a lesser extent) are higher than the ball mill work index, then the circuit will probably require peb...\""},{"logid":1321,"ns":0,"title":"HPGR or SAG","pageid":245,"logpage":245,"revid":1544,"params":{},"type":"create","action":"create","user":"Alex Doll","timestamp":"2026-05-25T20:42:06Z","comment":"Created page with \"== HPGR or SAG? == Choosing an appropriate grinding configuration is important for conceptual design.  Here are some things to consider when making the choice between an HPGR-ball mill circuit and a SAG-ball mill circuit.  ===Work index ratios === Having a hard ore is not a valid reason for choosing an HPGR circuit, the ore must be hard in a certain way.  More specifically, it should have a rod mill work index greater than the ball mill work index, and a ball mill work i...\""},{"logid":1320,"ns":6,"title":"File:SGI v WiRM.svg","pageid":244,"logpage":244,"revid":1538,"params":{},"type":"create","action":"create","user":"Alex Doll","timestamp":"2026-05-15T13:18:27Z","comment":"Public Grindability Database regression of the SAG Grindability Index versus the Bond-type rod mill work index.  Only considers SGI values below 150 minutes."},{"logid":1319,"ns":6,"title":"File:SGI v WiRM.svg","pageid":244,"logpage":244,"revid":1538,"params":{"img_sha1":"mkr8mrangpnbbnrx5xikzgol6j5i0og","img_timestamp":"2026-05-15T13:18:27Z"},"type":"upload","action":"upload","user":"Alex Doll","timestamp":"2026-05-15T13:18:27Z","comment":"Public Grindability Database regression of the SAG Grindability Index versus the Bond-type rod mill work index.  Only considers SGI values below 150 minutes."},{"logid":1318,"ns":6,"title":"File:WiRM v SGI.svg","pageid":243,"logpage":243,"revid":1537,"params":{},"type":"create","action":"create","user":"Alex Doll","timestamp":"2026-05-15T13:17:09Z","comment":"Public Grindability Database regression between Bond-type rod mill work index and the SAG Grindability Index (SGI), only considering SGI values below 150 minutes."},{"logid":1317,"ns":6,"title":"File:WiRM v SGI.svg","pageid":243,"logpage":243,"revid":1537,"params":{"img_sha1":"47y9whn40h4vb0dr4zs7y9nzmb6yyzy","img_timestamp":"2026-05-15T13:17:09Z"},"type":"upload","action":"upload","user":"Alex Doll","timestamp":"2026-05-15T13:17:09Z","comment":"Public Grindability Database regression between Bond-type rod mill work index and the SAG Grindability Index (SGI), only considering SGI values below 150 minutes."},{"logid":1316,"ns":6,"title":"File:ExampleDB-WiRMvSGI-comparison.png","pageid":132,"logpage":132,"revid":1536,"params":{"img_sha1":"4c3q13le6nsnz4wj697qkgi808f3ykl","img_timestamp":"2026-05-15T13:12:36Z"},"type":"upload","action":"revert","user":"Alex Doll","timestamp":"2026-05-15T13:12:36Z","comment":"Reverted to version as of 13:59, 2 July 2024 (UTC)"},{"logid":1315,"ns":6,"title":"File:ExampleDB-WiRMvSGI-comparison.png","pageid":132,"logpage":132,"revid":1535,"params":{"img_sha1":"s92ks2axe1gcx3908ae0rb9mp9qzc2r","img_timestamp":"2026-05-15T13:11:17Z"},"type":"upload","action":"overwrite","user":"Alex Doll","timestamp":"2026-05-15T13:11:17Z","comment":""},{"logid":1314,"ns":6,"title":"File:A\u00d7b v WiRM2.png","pageid":242,"logpage":242,"revid":1522,"params":{"img_sha1":"f4ylv2mv33s66k08k0suk8p62a2opf2","img_timestamp":"2026-01-09T13:04:51Z"},"type":"upload","action":"upload","user":"Alex Doll","timestamp":"2026-01-09T13:04:51Z","comment":"2025 version of the Public Grindabilty Database"},{"logid":1313,"ns":6,"title":"File:ExampleDB-WiRMvAxb-comparison.png","pageid":130,"logpage":130,"revid":1519,"params":{"img_sha1":"02k9r4ux7awgzr0dr0i91vk02ytlael","img_timestamp":"2026-01-09T12:35:05Z"},"type":"upload","action":"overwrite","user":"Alex Doll","timestamp":"2026-01-09T12:35:05Z","comment":"updated for 2025 Public Grindability Database"}]}}