Worth investing in EFE?, page-80

Some info for y’all to read

https://www.mogroup.com/insights/blog/mining-and-metals/eco-efficient-and-cost-effective-process-design-for-magnetite-iron-ore/







In this study it was found that highly energy-efficient autogenous processing routes can offer significant benefits for fine-grained, competent magnetite ores.

The traditional AG mill and pebble mill-style comminution circuit or those requiring significant steel grinding media to operate have been found to be less effective from a purely economic perspective. Circuit options utilizing multi-stage magnetic separation and with energy-efficient autogenous comminution equipment, although more complex, are more likely to add project value. For the ore type evaluated, the application of HPGR and stirred mill technology is indicated to reduce energy consumption by up to 25 percent compared with conventional flowsheets with wet tumbling mills.

There are many other flowsheet selection drivers that can become relevant, however, the operating cost associated with power draw and grinding media will always remain critical, even more so with the expected introduction of a carbon tax. A “synergy” of HPGR, pebble and stirred milling can result in a very effective circuit from a capital and operating point of view. It can be expected that highly energy-efficient autogenous processing routes would be further developed and increasingly applied in practice.