TITLE:
STILLMETAL - Sustainable sLag process to obtain a valuable METAL
DESCRIPTION:
STILLMETAL project develops a sustainable process to convert foundries slag into ferroalloys. It solves the problem of slag landfill disposal, transforming a cost into a revenue and increasing competiveness and independence from raw materials supply. Know-how belongs to OPIGEO (SME specialized in slag valorisation), to UNIPD and ZAG, whereas ITALGHISA (SME ferrolloys leading supplier) possesses trade secret. ZEROCENTO will be the 1st customer building the industrial plant (TRL9).
Cast iron foundry companies produce an average of 1.000 tons/year of slag (500.000 tons/year in Italy; 5 million tons/years in Europe) that’s now disposed of in landfill with a cost of 25€/tons. The project aims to valorise the slag through a process, sustainable from both technical and economical point of view, able to transform it into valuable materials. This process involves the reaction at high temperatures, in the molten state, between the slag and specific added materials to give a metal and a residual oxide slag. The added materials are either home or new or old scraps rich in Si and old scraps of Al. The obtained metal has a composition of a Ferroalloy, a valuable alloy of iron with silicon, that can be sold or reused inside the same foundry for the production of new cast iron, whereas the residual oxide slag, despite being a slag, possesses a right composition, a mix of oxides of aluminium, silicon and alkali, to have a market value for ceramic and/or cement industry. The process has already been tested at TRL5 and during the project a process at TRL9 will be realized and installed in a cast iron foundry. The process will contribute to improve both the cost saving (reducing to zero the waste management) and the resource and energy efficiency (producing ferroalloy from slag) of cast iron foundries.
Cast iron foundry companies produce an average of 1.000 tons/year of slag (500.000 tons/year in Italy; 5 million tons/years in Europe) that’s now disposed of in landfill with a cost of 25€/tons. The project aims to valorise the slag through a process, sustainable from both technical and economical point of view, able to transform it into valuable materials. This process involves the reaction at high temperatures, in the molten state, between the slag and specific added materials to give a metal and a residual oxide slag. The added materials are either home or new or old scraps rich in Si and old scraps of Al. The obtained metal has a composition of a Ferroalloy, a valuable alloy of iron with silicon, that can be sold or reused inside the same foundry for the production of new cast iron, whereas the residual oxide slag, despite being a slag, possesses a right composition, a mix of oxides of aluminium, silicon and alkali, to have a market value for ceramic and/or cement industry. The process has already been tested at TRL5 and during the project a process at TRL9 will be realized and installed in a cast iron foundry. The process will contribute to improve both the cost saving (reducing to zero the waste management) and the resource and energy efficiency (producing ferroalloy from slag) of cast iron foundries.
DURATION:
2022/07/11 - 2024/12/31
FUNDING:
EIT RM
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