| 00:00:00 | Comminution - history and laws |
| 00:00:21 | Posted Abstract |
| 00:00:38 | Format |
| 00:01:22 | Definition |
| 00:01:49 | Comminution |
| 00:02:47 | Crushing & Grinding |
| 00:03:16 | Why crush? Why grind? Why size reduce? |
| 00:05:08 | Examples where size reduction is important |
| 00:05:53 | When not to crush? |
| 00:06:09 | Crushing before Agricola |
| 00:06:26 | Chimpanzees |
| 00:06:50 | Black powder |
| 00:07:34 | Native American grinding stones |
| 00:07:48 | Size reduction - comminution |
| 00:08:22 | Crushers and mills |
| 00:08:37 | Mills |
| 00:08:59 | Size reduction - particle size example! |
| 00:09:08 | Breakage of large particle(s) |
| 00:10:31 | Breakage of large particle(s) |
| 00:11:38 | Comment |
| 00:11:52 | Dry and wet milling |
| 00:13:31 | The link between energy and size reduction |
| 00:14:38 | From muscles to electricity |
| 00:14:55 | Most is wasted… |
| 00:15:24 | Energy |
| 00:15:47 | The laws |
| 00:17:32 | Pages 900 - 901 |
| 00:18:15 | Milling/comminution/size reduction |
| 00:18:41 | Rittinger (1867) |
| 00:19:33 | Kick (1885) |
| 00:20:50 | Proofs of Rittinger’s and Kick’s Laws |
| 00:21:15 | Bond (1951/2) |
| 00:21:54 | Fred Bond (1899 - 1976) |
| 00:23:09 | General form |
| 00:23:29 | Specific form (1961) |
| 00:23:46 | http://www.met.sgs.com/min_sgs_403_australia_comminution_a4.pdf |
| 00:23:56 | BICO (http://www.bicoinc.com/ballMill.html) |
| 00:24:02 | Milling/comminution/size reduction |
| 00:24:11 | Hukki 4th Law (1960-1975) |
| 00:24:51 | Untitled |
| 00:25:27 | Alban J Lynch, and Chester A. Rowland The history of grinding Soc./Mining, Metallurgy & Expl., 2005 ISBN 0-87335-238-6 |
| 00:25:37 | Milling/comminution/size reduction |
| 00:25:46 | Rittinger |
| 00:25:59 | Modeling comminution distributions |
| 00:27:18 | General form of equation |
| 00:27:39 | Rosin-Rammler-(Sperling-Bennett-Weibull) |
| 00:27:57 | …..or more simply Rosin-Rammler |
| 00:28:18 | RRSB |
| 00:28:50 | RRSB |
| 00:29:37 | Energy Consumption |
| 00:30:02 | Cement – energy consumption 32mm screen |
| 00:30:42 | Laws of comminution |
| 00:31:03 | Some words on wet size reduction Milling to nano dimensions? |
| 00:31:33 | Why? |
| 00:32:11 | Wet reduces (tendency to) aggregation Michael Peters, Plant Manager, Pfizer Pty. Ltd, West Ryde, NSW, Australia "Size reduction in pharmaceuticals" Australian Chemical Processing and Engineering July 1969 pp 22 - 27 |
| 00:33:10 | Colloid mills |
| 00:33:28 | Energy/Time! x50, x90, x99 |
| 00:34:09 | Classifier Efficiency Tromp Curve |
| 00:34:23 | Grade Efficiency (Tromp) Curve |
| 00:34:50 | Grade Efficiency (Tromp) Curve |
| 00:35:47 | Grade Efficiency (Tromp) Curves |
| 00:36:39 | Grade Efficiency (Tromp) Curves |
| 00:36:51 | Thank you! |
This presentation deals with size reduction - a technique found in virtually every industry from mining to pharmacueuticals. We will briefly deal with the long history of size reduction before outlining comminution theories and their applicability.