Vedanta Aluminium invites waste-to-wealth partnerships with the cement industry for manufacturing low-carbon products

Vedanta Aluminium Business has invited partnerships from cement producers for using its by-products for manufacturing low-carbon cement. The company expressed its interest in long-term collaboration with cement industry players on opportunities of using fly ash and bauxite residue in cement manufacturing. These two products can be used in cement and concrete manufacturing, providing cement manufacturers significant benefits in terms of quality output, cost and sustainability. Fly ash can partially replace cement in concrete (or be used to produce blended cement), significantly improving the durability and workability of cement. With a 30-33 per cent blending ratio, fly ash can help save 270 kg of carbon emissions for every tonne of cement produced. Bauxite residue can be added to the raw mix in clinker manufacturing to replace virgin bauxite, improving its hydraulic properties and strength. Due to the high concentration of iron oxide and alumina, bauxite residue is a better substitute for laterite, used in clinker manufacturing. Moreover, the residual caustic in bauxite residue helps in controlling the emission of sulphur when used directly, making it a better fit for the purpose. Being industrial wastes themselves, both fly ash and bauxite residue come with significant cost and energy advantages as well.

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