
“White gold”
Historically used in the paper and ceramics industry, kaolin is now viewed as a “white gold” new economy commodity, able to play a pivotal role in carbon reduction across a range of industries when processed into metakaolin or High Purity Alumina (“HPA”).
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Metakaolin
Now recognised as one of the best cement substitutes in concrete production, metakaolin can enable the associated CO2 emissions of concrete to be reduced by up to 40% through reducing the amount of cement required in the process. To put this into context, the cement/concrete industry currently generates 8% of global CO2 emissions and around 25% of industrial emissions. If viewed as a country, this sector would be the third largest emitter behind China and US with every tonne of cement produced generating up to a tonne of CO2.
Improving concrete’s performance
Studies have also shown metakaolin can improve concrete’s flexibility and strength whilst reducing its permeability.
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HPA
HPA is in increasingly high demand as it is used in smartphones, LEDs and – most significantly – lithium-ion batteries. Traditionally produced from aluminium metal, new technologies mean HPA can now be produced more economically from kaolin. This is now fuelling an ever-growing interest in, and demand for, high quality kaolin.
High Value
Dependent on quality, processed kaolin can fetch up to $400/t, untreated $10-20/t in bulk.
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