Climate & Energy
Grecian Magnesite addresses in multiple simultaneous ways the objectives of maximizing its energy efficiency as well as playing its part in the joint effort to achieve climate neutrality by 2050 as set by the EC. Specifically:
- Ongoing efforts are being made to replace fossil fuels as much as possible with sustainably-produced biomass. During 2020, the contribution of biomass to our overall thermal power requirements was 10% whereas this figure is targeted to increase >30% within 2021. The biomass used by GM mainly consists of agricultural waste coming from the entire Chalkidiki region.
- Thorough investigation of the possibility to fully replace the solid fossil fuels used for Rotary Kiln No 2 with LNG is already under way. If realized, this fuel switch would not only result in the reduction of CO2 emissions by at least 40% but render flue gas desulfurization unnecessary as well. Finally, the use of LNG as the main kiln fuel is expected to improve energy efficiency by at least 8%.
- Continuous efforts are being made to commercialize the greatest part of the captured rotary kiln dust as well as dusts from all downstream processing units. At present, >80% of these dusts are converted via pelletizing and recalcination into a saleable product.
- Systematic exploitation of the thermal energy contained in the rotary kiln flue gases to obtain proper drying of magnesite prior to magnetic beneficiation.
- Successful operation of a novel FGD plant fed with the flue gases of RK-3. Plant operation relies on the dry injection of MgO-based sorbents deriving from existing stockpiles of formerly unexploited mining waste. Research efforts to valorize the FGD plant byproduct are currently underway.
- Installation of low-NOx burners of our own making in RK-2 and RK-3. Preliminary results from the operation of these burners show that NOx emissions can be reduced up to 30% even under the high temperature conditions employed for DBM production.