ArcelorMittal Tubarão invests continuously in partnerships with teaching institutions all over the countries aiming at stimulating the academic sector to carry out researches for the development of new technology to make viable the use of steel making residues such as blast furnace and LD slag.
The result is the broadening of the field of opportunities for the development of researchers of such institutions, added to projects that make it possible to transform inert materials into quality raw material for several segments of the economy, from the construction to agricultural sector.
The cooperation of the educational institutions has been fundamental to maintain the company as a reference in the management of residues. In 2009, the production residues reuse index at Tubarão was above 97%, far higher than the sector average, which is 80%. From the total of residues reused, 32% are used in the steel process and 68% are traded.
Co-product obtained through Revsol treatment process, developed and patented by ArcelorMittal Tubarão, in 2002.
Acerita gained market for its qualities as road base and sub-base and for pavement cover. Produced from steel slag, it is widely used as a substitute for crushed stone, especially for road works. In 2009 the National Department for Transport Infrastructure (DNIT) approved the technical regulations for the use of Acerita as paving sub-base and base. This regulation, based on the evaluation of the structural and environmental technical aspects, will enhance its use in road paving in Brazil. In the last 5 years 392 thousand tons of Acerita have been used to pave streets, avenues and public roads, as well as industrial roads and yards, thus preventing the use of at least the same amount of non-renewable natural resources.
Also a result from the steel process, after the processing of steel slag, this co-product is used in primary coating of roads as a substitute for natural aggregates.
It is mainly used in a joint project with the government - specially the town halls in Espirito Santo - to improve traffic conditions and access to rural roads. It is also widely used as a primary coating of industrial roads and yards reducing implementation and maintenance costs. In the last 5 years Revsol has been used in improvement works on more than 260 km.