Construction and works
ALOCLIN
SALT SLAG TREATMENT BYPRODUCTS FOR CLINKER PRODUCTION
SECONDARY ALUMINIUM REFINING REQUIRES THE USE OF SODIUM AND POTASSIUM CHLORIDE MIXTURES as fluxes to prevent oxidation, increase yield and boost thermal efficiency; but in doing so, it generates so-called aluminium salt slag which is a hazardous waste. The recovery of salt slags aims at separating the aluminium metal and salt from the contaminants so that all components can be reused. RESAL, a company of the Otua Group, carries out the necessary grinding and separation treatments, and the hydrometallurgical treatment of the non-metallic fraction (NMF) of the salt slag, and is able to fully close the aluminium recycling and reuse cycle. For ALOCLIN, the cement company SOCIEDAD FINANCIERA Y MINERAL and INATEC, the Otua Group’s R&D Unit, have collaborated in the project.
The main source of input waste for the Otua Group’s secondary aluminium refinery is ELVs, which are subject to reuse, recycling and recovery targets that are difficult to achieve with the treatment technologies currently in operation.
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