Filtration solutions for metals and mining

Glosfume metals and mining

At Glosfume, we excel in crafting solutions that eliminate the emissions challenges posed by the metal and mining industry’s growing restrictions

The metals and mining industry remains a critical foundation of US infrastructure and manufacturing, with demand for minerals such as lithium, copper, and rare earth elements increasing as part of the transition to electrification and low-carbon technologies. At the same time, the US Environmental Protection Agency (EPA) continues to enforce strict limits on particulate emissions, including PM2.5, due to their impact on air quality and public health. High-temperature processes such as smelting and refining generate submicron particulates that can pass through conventional filtration systems, requiring more advanced control methods. As a result, effective hot gas filtration and emissions control are essential to support compliance, protect downstream equipment, and ensure reliable operation under increasingly stringent regulatory conditions.

At Glosfume, we pride ourselves on the ability to produce and provide air pollution solutions to the mining and metals industry to ensure that the ever-increasing restrictions on emissions associated with the industry are no longer a headache, removing the stigma of the industry being one of the biggest sources of global air pollution. Glosfume gas filtration systems are situated globally in a range of applications for the metals and mining industry, specializing in the removal and reduction of submicron particles, acid gases, NOx, and dioxins/furans. Glosfume is able to ensure all operations are creating “a breath of fresh air.”

Talk to us about metals and mining

Metals and Mining - At Glosfume, we excel in crafting solutions that eliminate the emissions challenges posed by the industry’s growing restrictions

Where we help in the metals & mining industry

Metal and mining processes generate high-temperature gas streams containing particulates, fumes, and gaseous emissions that must be controlled to meet increasingly stringent environmental regulations. Glosfume filtration systems are designed to operate within these demanding conditions, supporting compliance while protecting downstream equipment and maintaining process efficiency.

Primary smelting (including aluminum)
Primary smelting operations produce high-temperature off-gases containing fine particulates, metal oxides, and process fumes. In aluminum smelting, emissions may include process-specific gaseous compounds and submicron particulate. Effective high-temperature filtration is critical to capture these contaminants before discharge, helping meet air quality standards and protect downstream systems.

Secondary smelting and metal recovery
Secondary smelting processes, including recycling and metal recovery, often generate variable emissions due to inconsistent feedstock. Dust, fumes, and vaporized metals are common, requiring robust filtration capable of handling fluctuating conditions.

Foundries and casting operations
Foundry processes produce particulate-laden exhaust streams from melting, pouring, and mould handling. These emissions can include fine dust, sand particles, and combustion by-products. Filtration at elevated temperatures helps reduce particulate discharge and protects downstream equipment from fouling and wear.

Mining and ore processing
Ore processing activities such as crushing, drying, and thermal treatment generate dust and fine particulates that can become entrained in process gases. In higher-temperature stages, these emissions may include submicron particles that can pass through conventional filters, requiring high-temperature filtration for effective removal.

Metal finishing and thermal treatment
Processes such as heat treatment, coating, and surface finishing can produce fine particulates and gaseous emissions depending on the materials and temperatures involved. Consistent filtration performance is required to manage these outputs, particularly where regulatory compliance and air quality standards are critical.

Across all of these applications, the ability to capture submicron particulate at high temperatures supports compliance with tightening emissions regulations while improving plant reliability and reducing maintenance demands.

Key challenges faced by the metals and mining sector

High-temperature metal and mining processes generate complex emissions and operational challenges, requiring reliable filtration to maintain compliance and system performance. Glosfume filtration systems are designed to address these challenges directly.

Continuous high-temperature operation

Metal processes produce hot gas streams that require continuous filtration at elevated temperatures. Glosfume systems are designed to operate continuously at temperatures up to 750°C under both vacuum and pressure conditions, maintaining stable performance.

Disposal and material handling

Conventional filtration methods can generate liquid waste streams that are costly to manage. Glosfume systems operate under dry conditions, allowing collected material to be discharged as dry bulk powder, which can be handled more easily and may be reused as feedstock where appropriate.

Scalability and system flexibility

Process capacity requirements can change over time. The modular pod system allows filtration units to be scaled in stages, enabling expansion without major system redesign.

Fire risk and temperature limitations

Many filtration systems require spark arrestors or temperature reduction to prevent damage. Glosfume ceramic filters are not susceptible to fire in the same way as conventional media, allowing operation at higher temperatures without additional protection systems.

Meeting evolving emissions standards

The metals and mining sector faces increasingly stringent emissions regulations. High-efficiency particulate removal supports compliance with current standards and helps prepare systems for future environmental requirements.

Control of acid gases and complex emissions

Process gases may contain acid gases and other harmful compounds. When combined with dry scrubbing processes, Glosfume systems can support the removal of these pollutants, improving overall emissions control.

Talk to us about metals and mining

Solutions: fume extraction and industrial air filtration systems for hot processes

Fume extraction and industrial air filtration systems for hot processes are designed to capture dust, fumes, and submicron particulates directly from high-temperature gas streams. In metals and mining applications, these systems function as part of an integrated filtration stage, removing particulate matter while supporting the control of gaseous pollutants such as NOx and other process-derived compounds.

In operation, hot gases are drawn through ceramic filter elements, where fine and submicron particles are retained on the surface, preventing release to atmosphere. This is particularly important in processes where particulate emissions include PM10 and PM2.5, which are known to pass through conventional filtration systems. When combined with dry scrubbing methods, these systems can also support the management of acid gases and compounds such as dioxins and furans, in line with established industrial filtration approaches .

Unlike workshop-style fume extraction systems, which are typically designed for ambient temperature air and localised capture, high-temperature industrial air filtration systems operate directly within process gas streams. This allows filtration to take place without significant cooling, maintaining efficiency and ensuring compatibility with demanding thermal conditions.

Overall, these systems provide a practical solution for controlling emissions, protecting downstream equipment, and supporting compliance with increasingly stringent environmental regulations in metals and mining operations.

Dry scrubbing + multi-pollutant control

Dry scrubbing combined with high-temperature filtration provides an effective approach to multi-pollutant control in metals and mining processes. Within this approach, particulate removal and gas treatment occur within the same system, supporting control of emissions from complex, high-temperature gas streams.

In operation, a dry absorbent such as sodium bicarbonate or similar material is introduced into the gas stream upstream of the filtration stage. As the gas passes through the ceramic filter elements, particulates are captured while the absorbent reacts with targeted pollutants. This enables the treatment of acid gases and the reduction of compounds such as dioxins/furans within the same process step, alongside particulate filtration.

This dry process avoids the generation of liquid waste streams and allows the reaction products to be collected as dry material, simplifying handling and disposal. It also enables operation across a broad temperature range without the need for significant gas cooling, maintaining process efficiency.

In addition to particulate control, this combined approach supports the management of NOx and other gaseous compounds where applicable, contributing to overall emissions reduction. As emissions restrictions continue to tighten across the metals and mining sector, integrated dry scrubbing and filtration systems provide a practical route to maintaining compliance while ensuring stable and reliable operation.

Scalable system design (pod-based, 1–32 pods)

Glosfume industrial air filtration systems are designed using a modular, pod-based approach that allows capacity to be scaled in line with process requirements. Each pod functions as a self-contained filtration unit, and multiple pods can be combined to form a complete system sized to the application.

In practical terms, this means systems can be configured from a single pod for smaller installations up to larger multi-pod arrangements, depending on gas flow rate and operational demand. As process requirements increase, additional pods can be integrated into the system, allowing expansion without the need for complete system replacement.

This modular design supports flexibility during both initial installation and future upgrades. Systems can be delivered in sections for ease of transport and installation, and individual pods can be isolated for maintenance while the remaining system continues to operate. This helps maintain continuity in demanding industrial environments.

For operations requiring a dust collection system capable of adapting to changing production levels, the pod-based design provides a practical and scalable solution. It enables phased investment while supporting consistent filtration performance across the full system.

FAQ

Fume extraction refers to the capture and removal of hazardous fumes, dust, and fine particulates directly from high-temperature process gas streams. In metals and mining applications, this includes submicron particles that can pass through conventional systems and are subject to increasingly strict emissions restrictions. Glosfume systems are designed to address these challenges through high-temperature ceramic filtration integrated within the process.

Metal processing often generates sparks and hot particles that can pose a fire risk in conventional filtration systems. Spark-safe filtration is important to prevent ignition and maintain safe operation. Ceramic filter elements are not susceptible to fire in the same way as traditional media, allowing operation at elevated temperatures without the need for spark arrestors or gas cooling, supporting continuous and stable operation.

Oil mist extraction involves removing fine oil droplets suspended in air, typically generated during machining, cutting, or metal finishing processes. While this is relevant in certain metalworking environments, it generally occurs at lower temperatures. Glosfume systems are focused on high-temperature industrial emissions, particularly where hot gas filtration and submicron particulate control are required.

Grinding dust extraction involves capturing airborne dust and fine particles at source to prevent exposure and maintain safe working conditions. This typically requires appropriately designed extraction and filtration systems to control particulate emissions and meet health and safety requirements. Effective filtration helps reduce airborne dust levels and supports compliance with workplace regulations.

Industrial filtration systems can be scaled using a modular approach. Glosfume systems utilise a pod-based design, allowing configurations from a single pod up to larger multi-pod systems. This enables capacity to be increased as production requirements change, supporting phased investment and long-term flexibility without complete system replacement.

Processes such as smelting, refining, and thermal treatment generate high-temperature gas streams containing particulates, metal oxides, and gaseous compounds. These emissions often include fine and submicron particles, which require effective filtration to prevent release and ensure compliance with environmental regulations.

Many metal and mining processes operate at elevated temperatures where conventional filtration systems are not suitable. High-temperature filtration allows gases to be treated directly within the process stream, avoiding the need for cooling and maintaining overall system efficiency while capturing fine particulates.

Captured particulates form a layer on the surface of the filter elements and are periodically removed using reverse-jet cleaning. The material is then discharged as dry bulk powder for collection and handling, simplifying disposal and, in some cases, enabling reuse within the process.

Metals and mining case studies

Ceramic elements, Metals and mining

Secondary smelting of scrap car engines

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Talk to us about gas filtration for the metals and mining industry

Glosfume offers self-cleaning, high-efficiency filters that can withstand up to 1000°C of heat. We have installed over 2,000 filters covering all seven continents over the last three decades, a feat that has positioned Glosfume as a global market leader.

We pride ourselves on our cost-effective pricing, thanks to our in-house approach to designing and manufacturing. With Glosfume, you will receive high-quality bespoke solutions at a competitive price.

Our award-winning hot gas filtration systems can also be tailored to the unique specifications of your application, so get in touch to discuss your requirements using the contact form.

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