Antinuclear

A solar energy revolution in mining

The next solar revolution could replace fossil fuels in mining, The Conversation, Geoffrey Brooks Pro-Vice Chancellor (Future Manufacturing), Swinburne University of Technology, June 29, 2016  Recently Sandfire Resources, a gold and copper producer based in Western Australia, announced its new solar power plant will soon start powering its DeGrussa mine. By replacing diesel power, the 10-megawatt power station, with 34,000 panels and lithium storage batteries, is expected to reduce the mine’s carbon emissions by 15%.

This is an exciting development because it realises an important potential that has long been recognised but not exploited. Two of Australia’s greatest resources – solar energy and minerals – are, as luck would have it, both highly concentrated in the same parts of Australia.

In this case, solar energy is being used to power the mine, but there is also great potential for solar energy to be used to convert the minerals to chemicals and metals……..

The next revolution

Currently, Australia’s use of solar energy is largely limited to homes, for hot water and solar-powered electricity. But solar energy has great potential for regional Australia too.

Mines are often isolated. There is typically limited natural gas and electricity supply, and in remote areas energy supply is limited to liquid fossil fuels. This is exactly the potential being exploited by Sandfire Resources at its mine facility 900km north of Perth.

Recent studies by CSIRO have identified the potential to use solar in high-temperature processing of ores such as bauxite, copper and iron ore. This process would use concentrated solar thermal (CST) energy as a heat supply. This heat can also be converted to electricity, known as concentrated solar power (CSP).

This is different to the solar photovoltaic technology used in Sandfire’s solar power plant (and rooftop solar panels), which converts sunlight directly to electricity……..

Concentrated solar energy is still relatively expensive. The Australian Solar Institute estimated in 2012 that the cost of electricity from concentrated solar was approximately double the current cost for conventional energy, reflecting largely the high capital cost of solar systems.

This gap can reasonably be expected to close with increases in the scale of operations (lowering manufacturing costs) and in regulatory pressure on conventional power sources.

It may be a way off, but the small step by Sandfire Resources could be the start of a revolution in the Australian minerals industry. https://theconversation.com/the-next-solar-revolution-could-replace-fossil-fuels-in-mining-61153

June 30, 2016 - Posted by Christina Macpherson | AUSTRALIA - NATIONAL, solar