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Aluminum Recycling Foundry

NaHCO3 SOLVAir®
Active Carbon / Lignite

Pre-ground SOLVAir® Sodium Bicarbonate and Active Carbon or Lignite Coke for Aluminum Recycling Foundry

In the metallurgical industry, aluminum recovery smelters are crucial to the metal's lifecycle, enabling efficient resource utilization and waste reduction. However, this industrial process generates fumes containing pollutants such as sulfur oxides (SOx), hydrochloric acid (HCl), hydrofluoric acid (HF), and heavy metals, including copper, magnesium, silicon, zinc, and manganese, which pose a threat to the environment and public health. To address this challenge, it is essential to implement cutting-edge fume treatment methods to limit the environmental impact of aluminum recovery smelters.

Solution with Pre Ground SOLVAir® Sodium Bicarbonate plus Active Carbon or Lignite Coke

Using a combination of Solvay SOLVAir® pre-ground sodium bicarbonate and activated carbon or lignite coke, highly efficient flue gas purification can be achieved from aluminum smelters. Sodium bicarbonate effectively reacts with the acids in the flue gas, neutralizing them and converting them into inert salts, while activated carbon or lignite coke can adsorb heavy metals and other harmful pollutants. The process requires precise injection of these additives through two calibrated dosers, ensuring maximum contaminant removal efficiency and compliance with environmental regulations.

Design and Realization

MetalTek specializes in the design and manufacture of high-quality mills and feeders with top-quality components. Our equipment is available in various configurations, and upon request, we can design customized loading and injection solutions for every need.

Metaltek Dosers Specialized for SOLVAir® Pre-ground Sodium Bicarbonate Metaltek Dosers Specialized for Active Carbon or Lignite Coke

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Metaltek Services: Assistance, Maintenance and Monitoring

Assistance, Maintenance and Monitoring Services on existing systems

Metaltek, with thirty years of experience in the sector, supplies cutting-edge systems for the purification of industrial fumes, designed to guarantee reliability, continuous efficiency and compliance with environmental regulations.

Thanks to our team of highly specialized consultants and designers, we create customized solutions that optimize the use of pre-ground sodium bicarbonate, active carbon and lignite coke, reducing operating costs and waste. We offer timely assistance, professional analyses, teams equipped to work at heights and in confined spaces, and a constantly stocked spare parts warehouse. The quality and robustness of our systems, combined with global technical support and our Tek Lab analysis service make them ideal for flue gas purification where precision, reliability, and service continuity are essential.

Tek Lab by Metaltek: the exclusive fixed and mobile analysis laboratory for monitoring, testing and innovation

Tek Lab: Analysis and Innovation Laboratory

Tek Lab by Metaltek is a leader in the analysis of industrial fumes and residues. A cutting-edge technology to detect and address issues with overdosing or problems related to excess acids, dioxins, or other harmful compounds. It offers both on-premises analysis and on-site monitoring and analysis with its mobile laboratory.

Quality Products and exclusive Metaltek Services: a benchmark, the state of the art of Aluminum Recycling Plants

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Flue Gas Cleaning with Pre-ground Solvay SOLVAir® Sodium Bicarbonate and Active Carbon or Lignite Coke

FAQ

What are the main pollutants generated in aluminum foundries?

Aluminum recovery foundries emit pollutants such as sulfur oxides (SOx), hydrochloric acid (HCl), hydrofluoric acid (HF), and heavy metals such as Copper, Magnesium, Silicon, Zinc, and Manganese, which must be controlled to minimize harmful effects on the environment and human health.

Why is premixed sodium bicarbonate and activated carbon/lignite coke used for flue gas cleaning in aluminum foundries?

During the melting and recovery of aluminum, fumes contaminated with sulfur oxides (SOx), acids (HCl and HF), and heavy metals (such as Copper, Magnesium, Silicon, Zinc, and Manganese) are emitted. Premixed sodium bicarbonate neutralizes these acids, converting them into less harmful solid salts, while activated carbon or lignite coke captures the heavy metals, offering a significant reduction in harmful emissions.

What roles do sodium carbonate or sodium bicarbonate and activated carbon or lignite coke play in aluminum foundries?

Sodium carbonate and sodium bicarbonate reduce the acidity of the fumes transforming them into inert compounds such as sodium chloride (NaCl) and sodium fluoride (NaF), thus reducing the environmental impact of the emissions. Activated carbon and lignite coke, thanks to their adsorption capacity, effectively remove heavy metals and other hazardous compounds from the fumes.

Can activated carbon and lignite coke be used interchangeably?

While both activated carbon and lignite coke are employed in flue gas purification, their properties differ slightly. Activated carbon, with its advanced porous structure, is particularly effective in adsorbing a wide range of pollutants. Lignite coke, on the other hand, is better suited to specific needs, such as low-temperature treatment, providing a cost-effective solution where applicable.

Is there a difference between using Sodium Carbonate and Sodium Bicarbonate?

Sodium Carbonate and Sodium Bicarbonate are both used to neutralize acids in the fumes, but they operate differently. Sodium Carbonate, being more alkaline, efficiently neutralizes a broad range of acids, while Sodium Bicarbonate decomposes into CO2, water, and active Sodium Carbonate, increasing efficiency due to its greater contact area with the acids, particularly under reduced temperature conditions.

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