SISEMTEK S.r.l. is an Italian company based in Niardo, Brescia, specializing in the design, manufacture, and installation of specialized furnaces and equipment for large-scale recycling of precious and strategic metals.
The company, formed through the merger of ETEK S.r.l. and Tecnosap, focuses on pyrometallurgical technologies including Top Blown Rotary Converter (TBRC) furnaces, along with supporting hydrometallurgical processes and electrowinning systems. Its solutions process heterogeneous feedstocks such as e-waste, spent catalysts, batteries, and mining residues to produce black copper and refined metals including copper, gold, silver, platinum, and palladium.
In June 2026, NEXTCHEM, a MAIRE subsidiary, acquired a 70% stake in ETEK S.r.l., which wholly owns SISEMTEK, to expand its circular economy offerings in critical raw materials recovery.
Revenues +6.9% to €3.68bn; EBITDA +14.7% to €266.2m; H1 order intake €7.2bn, backlog €16.3bn; Nextchem buys Ballestra and 70% of ETEK.
Majority buy adds pyrometallurgical, hydrometallurgical and electrowinning tech to recover precious and critical metals from e‑waste, batteries, PV panels and mining tailings.
