EcoSand is a product that comes from ECOFER slag processing process. It is a unique ecological product which binds carbon dioxide from the air.
Cement clinker is produced by burning lime. This results in huge CO2 emissions. EcoSand is comparable with cement clinker and can be used in cement production instead of cement clinker and also in concrete production instead of sand. Recycling EcoSand to cement, to replace cement clinker, achieves 500 kg CO2 reduction per tonne. Economical impact is also huge. Cement clinker FOB price is around 30USD/ton.
How EcoSand is generated
Ecofer has developed with partner an unprecedented fine fraction crushing technology, combined with chemical treatment, deactivates active free lime from slag sand. In ECOFER process, the FeM is liberated from the lime and lime is crushed in to fractions of < 1 mm (80%) and < 4 mm (20%).
The slag of each steel mill is carefully studied and analyzed to find the best solution for neutralizing free lime.
The right recipe for use as additive in cement production is designed with cement laboratories by casting blocks. The blocks are mechanically and physically tested and compared with blocks made of Portland cement and sand.
China, for example, produces around 160 million tonnes of steel slag as a by-product of steel production, which could be recycled as a whole to cement production. In this way, China would reduce its CO 2 emissions from cement production by 80 million tonnes annually.
By ECOFER slag processing solution, China could reach totally reduction in CO2 emissions of 160 million tons annually.