Aluminum smelting is the process of extracting aluminum from its oxide, alumina, generally by the Hall-Héroult process. Alumina is extracted from the ore bauxite by means of the Bayer process at an alumina refinery.
Although abundant in the earth’s crust, pure aluminum is virtually impossible to find. Until the development of the Hall-Héroult process, the available quantities of pure aluminum amounted to samples. The Hall-Héroult process enabled the mass production of aluminum. In 1888, Hall founded the first industrial smelting operation, and global production has grown ever since.
By eliminating the risk in hazardous waste materials, transforming it into valuable products with assured market offtakes, aluminum smelter waste materials such as spent potlining, butt shot-blast fines and high-sodium anode butts, can be considered as valuable mineral resources, if treated properly. If the hazards in the materials are removed while retaining the valuable chemicals and minerals, the materials can be used for beneficial energy savings and lower greenhouse gas emissions in cement manufacture.
Limult Group realises this value proposition by:
- transforming hazardous waste materials into valuable products that are safe to handle and use in other industries
- delivering products and technical support to established markets
- providing certification for regulatory compliance and chain of custody control.
Limult provides a fully sustainable solution for SPL recovery and re-use with no residual waste material.
By maximizing the value of these materials, Limult provides the smelter with the lowest cost option for responsible management of residual materials.
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