Scrap metal is recycled in five stages: collection and traceability, inspection and sorting, magnetic and eddy-current separation, shredding and screening, and smelting to produce new metal. The process separates ferrous metals (iron, steel) from non-ferrous ones (aluminium, copper) and returns them to the production cycle with the same quality as virgin raw material.

Unlike other materials, metals can be recycled infinitely without losing their physical or chemical properties. That makes scrap a strategic resource that sustains entire industries —from steelmaking to the automotive sector— reducing dependence on primary mining.

Summary table: stages of scrap metal recycling

Why is recycling scrap metal important?

Scrap metal recycling is a pillar of the circular economy because of its environmental and economic impact:

• Massive energy savings: producing aluminium from scrap requires 95% less energy than producing it from virgin bauxite. Recycling steel consumes less than 40% of the energy needed to make new steel.
• Lower emissions: manufacturing with recycled material can cut CO₂ emissions by up to 20%, which is key to global climate targets.
• Less mining: it avoids one of the most destructive activities for the ecosystem —soil erosion and biodiversity loss— and preserves finite deposits.
• Stable supply: an estimated 40% of the world’s steel comes from recycled scrap.

Types of recyclable metals

Ferrous metals: steel and cast iron

They contain iron as their base element and include steel and cast iron. Their magnetic property greatly simplifies their separation during the process. Since steel is one of the most widely used materials in construction, managing it is critical to maintaining industrial supply.

Non-ferrous metals: aluminium, copper, nickel, tin and zinc

They contain no iron. They represent a smaller volume but greater economic value. Their demand in electronics and high technology stems from properties such as electrical conductivity or corrosion resistance. Nickel and zinc are essential in alloys that require durability under extreme conditions.

The 5 stages of the scrap metal recycling process

1. Collection, transport and traceability

The cycle begins with the extraction of the material from industrial dismantling operations or urban collection points. Specialised vehicles transport it to the plant. The initial weighing and legal documentation are essential: they ensure regulatory compliance and set the real economic value of the incoming batch. Good segregation at source reduces later costs.

2. Inspection and sorting at the plant

The materials undergo rigorous inspection. Appraisers identify contaminants and assess the quality of the metal in order to determine its destination in the production chain.

3. Separation of ferrous and non-ferrous

Here technology is decisive:

• Magnetic separation: high-power magnets extract iron and steel.
• Eddy currents: they repel conductive non-ferrous metals such as aluminium, separating them from plastics.
• Spectrometry: it identifies specific alloys in real time, allowing sorting to a very high degree of purity and maximising market value.

4. Shredding and screening

Industrial shredders reduce the size of bulky pieces such as car bodies. Twin-shaft shredders are ideal for metals and hard scrap thanks to their high torque and low energy consumption. Screening then separates the particles by size, and non-metallic components (plastics, textiles) are removed to prevent contamination of the final ingots.

5. Smelting and preparation

The clean, homogeneous material is melted down to return to the production chain. In the case of turnings and material that burns off excessively, briquetting compacts the metal and makes it possible to recover oils, coolants and emulsions, increasing resale value.

Handling specific types of scrap

Not all metal waste is processed the same way. Each stream requires differentiated techniques according to its origin and composition.

Electronic waste (WEEE)

Electrical and electronic devices are a challenge because of their technical complexity: they mix materials that must be separated with precision.

• Precious metals: phones and circuit boards hold small but valuable amounts of gold, silver and copper, which are isolated from the plastic and ceramic matrix through specialised processes.
• Hazardous waste: some components contain toxic substances that are managed under strict protocols to prevent contaminants from leaching into soil or water.

Industrial and demolition scrap

Dismantling warehouses or buildings generates beams and heavy structures that require robust machinery capable of cutting and breaking them up before sorting. The resulting mix contains various steels and alloys that are separated with magnets and eddy currents so that each fraction reaches the smelter with the necessary purity.

Packaging and cans

Drink and food cans form a steady, homogeneous stream with excellent recycling opportunities. Aluminium keeps its properties after multiple cycles and saves enormous amounts of energy compared with primary production. Before melting it, it is vital to remove leftover contents, labels and impurities through washing and drying, guaranteeing a flawless secondary metal.

Frequently asked questions about scrap metal recycling

What are the stages of scrap metal recycling?

Five: collection and traceability, inspection and sorting, separation of ferrous and non-ferrous, shredding and screening, and smelting. Each stage prepares the metal to return to the production chain with maximum purity.

How are ferrous metals separated from non-ferrous ones?

Ferrous metals (iron, steel) are extracted with high-power magnets thanks to their magnetic property. Conductive non-ferrous metals, such as aluminium, are separated with eddy currents. Spectrometry refines the sorting by identifying specific alloys.

How much energy does recycling scrap metal save?

Producing aluminium from scrap requires 95% less energy than from virgin bauxite, and recycling steel consumes less than 40% of the energy needed to make it new. This drastically reduces greenhouse gas emissions.

What machinery is needed to recycle scrap metal?

Twin-shaft shredders for hard metals, magnetic separators for ferrous metals, eddy-current separators for non-ferrous metals, screens to sort by size and conveyor belts to move the material between stages.

Does scrap metal lose quality when recycled?

No. Metals can be recycled infinitely without losing their physical or chemical properties, which makes them an ideal raw material for the circular economy.

Optimise your metal recycling process

Recycling scrap metal profitably depends on having the right machinery at every stage. Discover our industrial shredders and scrap metal shredders, or ask our team how to design a complete recycling machinery line tailored to your plant.

Industrial waste collection is an essential process to ensure that waste generated by productive activities is managed safely and in compliance with regulations. Proper planning helps reduce environmental risks, optimize resources, and promote the reuse of materials.

The Importance of Efficient Waste Collection

Industries generate a wide variety of waste streams that require different treatments depending on their composition. For this reason, waste collection is the first step in ensuring proper management and preventing pollution issues or regulatory non-compliance.

An efficient organization improves waste traceability and facilitates subsequent recycling, recovery, or disposal processes.

Main Types of Industrial Waste

Industrial waste can be classified into different categories:

Hazardous Waste

These wastes contain substances that may be harmful to people or the environment, such as chemicals, used oils, or contaminated sludge.

Non-Hazardous Waste

This category includes common industrial materials such as plastics, cardboard, metals, and packaging, which can often be recovered through recycling processes.

Waste by Physical State

Depending on its physical form, waste may be solid, liquid, or gaseous, which determines how it must be stored and transported.

Company Responsibilities

Current legislation establishes that waste producers are responsible for the proper management of the waste they generate. Their obligations include:

• Identifying and classifying generated waste.
• Ensuring safe storage conditions.
• Delivering waste to authorized waste management companies.
• Maintaining the documentation and records required by regulations.

Compliance with these obligations helps avoid penalties and improves an organization’s environmental performance.

Storage and Transportation

Before treatment, waste must be stored under suitable conditions to prevent leaks, mixing, or contamination.

Transportation must be carried out by authorized operators and supported by the required documentation, ensuring full control and traceability of waste from its origin to its final destination.

Waste Treatment and Recovery

Once collected, waste can follow different management routes:

• Recycling of recoverable materials.
• Energy recovery.
• Specific physical or chemical treatments.
• Controlled disposal when no recovery alternative is available.

The chosen treatment depends on the type of waste and its recovery potential.

Innovation and Sustainability

Digitalization, automation, and emerging technologies are improving the efficiency of industrial waste management. These tools help optimize collection processes, increase material recovery rates, and reduce operating costs.

At the same time, the circular economy promotes models in which waste is no longer considered a disposal problem but a valuable resource.

Conclusion

Industrial waste collection goes far beyond the simple removal of waste materials. It is a strategic process that combines regulatory compliance, environmental protection, and resource recovery. Efficient management helps reduce the environmental impact of industrial activities, improve sustainability, and advance toward more responsible and circular production models.

Waste segregation is a fundamental process for properly managing waste generated by households, businesses, and industries. It involves classifying waste according to its nature to facilitate recycling, treatment, and recovery, thereby reducing environmental impact and supporting the circular economy.

Fundamentals of Waste Segregation

Proper waste separation helps optimize waste management and improve the recovery of valuable materials. This process contributes to reducing pollution, lowering the use of virgin raw materials, and promoting more sustainable practices.

Its main benefits include:

• Reducing the amount of waste sent to landfills.
• Lowering polluting emissions.
• Saving natural resources and energy.
• Promoting recycling and material reuse.

Waste Classification

Recyclable Waste

Recyclable materials should be placed in the appropriate containers to facilitate their recovery:

• Paper and cardboard.
• Glass.
• Plastic packaging.
• Cans and metals.

Proper separation improves recycling efficiency and increases the quality of recovered materials.

Organic Waste

Food scraps, peels, and other biodegradable waste can be processed through:

• Composting.
• Anaerobic digestion for biogas production.

These treatments transform organic waste into useful resources such as fertilizers and renewable energy.

Hazardous Waste

This category includes batteries, chemicals, medicines, and electronic waste. These materials require specific management procedures to prevent risks to human health and the environment, following strict storage and treatment regulations.

Efficient Solid Waste Management

An effective waste segregation system should include:

• Properly labeled containers.
• Optimized collection processes.
• The use of compactors and sorting technologies.
• Collaboration between businesses, public administrations, and citizens.

The combination of these measures improves material recovery and reduces waste management costs.

Regulations and Legal Framework

In Spain, waste management is regulated by various laws aimed at promoting prevention, reuse, and recycling. Compliance with these regulations helps companies reduce legal risks, enhance their corporate image, and contribute to the sustainability objectives established by the European Union.

Waste Segregation in the Healthcare Sector

Healthcare waste requires specific classification due to the risks involved. This includes:

• Non-hazardous waste.
• Infectious waste.
• Sharps and cutting materials.
• Chemical or pharmaceutical waste.

Proper segregation and treatment are essential to protect public health and prevent environmental damage.

Training and Awareness

Employee training and public awareness are essential to ensure effective waste segregation. Recommended measures include:

• Training programs.
• Clear container labeling and signage.
• Digital support tools.
• Audits and process monitoring.

Environmental and Social Impact

Proper waste segregation contributes to:

• Reducing greenhouse gas emissions.
• Conserving natural resources.
• Improving environmental quality.
• Supporting the circular economy.
• Strengthening corporate social responsibility.

Conclusion

Waste segregation is an essential tool for achieving more efficient and sustainable waste management. Proper material classification, regulatory compliance, and the involvement of citizens and businesses help reduce environmental impact, improve recycling performance, and promote a circular economy based on the responsible use of resources.

Waste management regulations in Spain are essential to ensure sustainable waste management and reduce environmental impact. These regulations establish measures for waste collection, treatment, recycling, and recovery, while also promoting the development of the circular economy and environmental protection.

Regulatory Framework for Waste Management

Spanish waste legislation is based on national, regional, and European regulations. Among the most important are the Waste Legislative Royal Decree and the State Framework Waste Management Plan, which establish objectives for prevention, recycling, and reducing the amount of waste sent to landfill.

In addition, Spain’s autonomous communities develop specific regulations adapted to the needs of each territory, coordinating with local authorities to improve management efficiency. European Union directives also play a key role, especially in promoting the circular economy and ecological transition.

Types of Waste and Specific Regulations

The regulations distinguish different types of waste according to their hazardous nature and origin. The most important categories include:

• Hazardous waste, which requires strict controls for storage, transport, and disposal.
• Municipal and non-hazardous waste, managed through selective collection and recycling systems.
• Industrial and construction waste, subject to specific treatment plans.
• Waste electrical and electronic equipment (WEEE), regulated through extended producer responsibility systems.

Each category has specific protocols to minimize environmental risks and improve material recovery.

Extended Producer Responsibility

One of the pillars of current regulations is extended producer responsibility. This system requires manufacturers and distributors to take responsibility for managing the waste generated by their products at the end of their useful life.

This particularly affects sectors such as:

• Packaging and plastic products.
• Electrical and electronic equipment.
• Tires and other special waste.

To comply with these obligations, many companies participate in collective collection and recycling systems that allow waste to be managed more efficiently and sustainably.

Waste Collection and Treatment Operations

Waste management includes several key stages:

• Collection and transport.
• Classification and storage.
• Recycling and recovery treatments.
• Controlled disposal.

Among the most common treatments are material recycling, composting of organic waste, energy recovery, and in some cases, controlled incineration or disposal in authorized landfills.

Treatment facilities must comply with very strict technical and environmental requirements to ensure safety and minimize polluting emissions.

Waste Prevention and Circular Economy

Current regulations prioritize waste prevention over disposal. To achieve this, measures are promoted such as:

• Reducing the use of single-use plastics.
• Encouraging product reuse and repair.
• Implementing separate collection systems.
• Developing recyclable packaging and eco-design strategies.

The goal is to reduce waste generation and keep materials within the production cycle for as long as possible, thereby promoting the circular economy.

Environmental Protection and Administrative Control

The legislation also establishes control mechanisms to protect the environment and public health. These include:

• Regulation of contaminated soils.
• Environmental inspection and monitoring systems.
• Waste registration and traceability.
• Control of emissions and polluting activities.

Authorized companies and waste managers must comply with registration, reporting, and waste tracking obligations to ensure safe and transparent management.

Future Challenges in Waste Management

Among the main challenges are the increase in waste resulting from urban growth and consumption, as well as the need to modernize infrastructure and recycling systems.

Spain continues to move toward more sustainable models through the development of new technologies, process digitalization, and the integration of policies aligned with European sustainability and circular economy objectives.

Conclusion

Waste management regulations in Spain are essential to reducing environmental impact and promoting a more sustainable model based on the circular economy. Proper waste classification, collection, and treatment, together with the responsibility of producers, public administrations, and citizens, help improve material recovery and advance toward more efficient and responsible resource management.

Recycling plastics is a crucial activity for environmental sustainability and the circular economy. As everyday life produces large amounts of plastic waste, it is essential to understand the processes involved in its transformation and reuse. 

This comprehensive guide explores the key steps in plastics recycling, the different types of materials, and their impact on the environment. Through education and awareness, we can contribute to a more sustainable and responsible future. 

Key processes in plastics recycling 

Recycling plastics is an essential process for waste management in an increasingly sustainability-conscious world. Not only does this process reduce the amount of plastics that end up in landfills and oceans, but it also encourages the circular economy, where materials are reused instead of being discarded. The key processes in plastics recycling are described below. 

Collection and sorting of plastic packaging 

The first stage of plastic recycling begins with the collection of discarded packaging in homes and workplaces. It is essential that citizens properly separate plastic containers in the yellow container, which is specifically designated for this type of waste. A correct initial classification facilitates the subsequent process, since plastics can be mixed with other materials, which would complicate their recycling. 

Once the plastic containers are deposited in the yellow container, they are transported to recycling plants where they are sorted. In these facilities, a distinction is made between plastics, metals and bricks, thanks to an automated process that uses advanced technology. The purity of the materials is crucial, as it determines the quality of the recycled plastic that will ultimately be obtained. A good level of separation is essential to ensure that recycled plastics are suitable for the manufacture of new products.

Sorting and separation in specialized plants 

The next phase in plastics recycling takes place in sorting plants, where a more detailed process is carried out. These plants are equipped with technology that allows for a precise selection of different types of plastics. This step is key, as plastics have diverse properties and chemical compositions that require specific procedures for processing. 

In Spain, Ecoembes manages a network of 97 sorting plants. There, plastic packaging is classified into categories that include PET (polyethylene terephthalate), HDPE (high-density polyethylene), PVC (polyvinyl chloride) and polypropylene (PP), among others. Thanks to this type of sorting, the recycling process is optimized, ensuring that each type of plastic is treated with the most appropriate method to maximize its recovery and reduce pollution in recycling.

Transformation of plastics into recycled raw material 

Once the plastic packaging has been sorted and sorted, the next step is its transformation into recycled raw material. The plastics are grouped into bales and sent to approved recyclers, who are entities specialized in the processing of these materials. This process involves various treatment techniques, which usually include washing and crushing. 

In the case of PET, commonly used in bottles, it undergoes rigorous washing to remove impurities, followed by a crushing process in which it is converted into small chips. These chips are the ones that will be used to manufacture new packaging or even textile fibers. HDPE, on the other hand, also goes through a similar wash and is transformed into pellets that can be used to produce new products, such as pipes or containers. 

In summary, plastic recycling is a complex process that begins with the collection and sorting of packaging and culminates in the transformation of these into recycled raw materials. Each stage is critical to ensure that effective recycling is achieved that contributes to a more sustainable future.

Types of plastics and their specific recycling methods 

Recycling plastics is a process that varies significantly depending on the type of material used. Knowing the particularities of each plastic is essential to optimize its recovery and recycling. This section will address the specific recycling methods of the most common plastics, such as PET, HDPE, as well as the challenges associated with PVC and polypropylene. 

PET recycling: washing and shredding 

Polyethylene terephthalate (PET) is one of the most recycled plastics in the world, mainly used in beverage bottles. The recycling process begins with the collection of PET containers, which are then transported to recycling plants. There, an exhaustive washing and crushing process is carried out. 

In the washing phase, the containers are purified to remove contaminants such as labels and content residues. The clean PET is then shredded into small pieces, known as chips or flakes. These flakes are the ones that will be used as raw material for the manufacture of new products, including bottles, textiles, and other packaging. 

HDPE Recycling: Processes and Applications 

High-density polyethylene (HDPE) is another commonly recycled plastic, prevalent in cleaning products and food packaging. Like PET, the HDPE recycling process includes washing and transformation stages. HDPE containers are sorted and cleaned to remove impurities. 

Once cleaned, the HDPE is crushed and turned into pellets. These granules have very diverse applications, allowing the manufacture of new products such as containers, pipes and toys. The versatility of recycled HDPE makes it a highly valued material, thus contributing to the circular economy. 

PVC and polypropylene recycling: challenges and solutions 

Recycling other types of plastics, such as polyvinyl chloride (PVC) and polypropylene (PP), presents several challenges. Both plastics are less common in the recycling cycle, in part due to the complexity of their composition and the risks associated with their processing. 

• Purification requirements: PVC, for example, can release toxic substances during recycling, requiring more careful processes. 

• Limitations in mechanical recycling: Polypropylene, although recyclable, is not always accepted in recycling plants due to its low demand on the secondary market. 

• Technological innovations: New chemical recycling technologies are being developed to address these limitations, allowing these plastics to break down into their building blocks. 

With the development of better methods and technologies, it is possible to increase the recycling rate of these plastics and minimize their environmental impact, contributing to a more sustainable future. 

Impact and management of plastics recycling 

Recycling plastics has a significant impact on both an environmental and economic level. Proper management of plastic waste not only contributes to the reduction of environmental impact, but also offers opportunities to strengthen the circular economy. Through a comprehensive approach to recycling management, it is possible to maximize the benefits derived from this crucial process. 

Environmental and economic benefits of recycling 

Plastic recycling is presented as an effective solution to mitigate various environmental problems. First, it helps reduce the amount of waste sent to landfills, which in turn decreases soil and water pollution. By recycling plastics, the generation of new materials from virgin resources is avoided, which translates into lower energy consumption and a reduction in greenhouse gas emissions. 

From an economic point of view, plastics recycling not only creates jobs in the waste management and recycling sector, but also promotes innovation in the production of new materials and products. The integration of recycled plastics in the manufacture of products, such as new packaging and textile fibres, boosts the competitiveness of companies by offering more sustainable alternatives to consumers. 

Education and public awareness for responsible recycling 

Education and awareness are fundamental pillars in the management of plastic recycling. Ecoembes and other organisations work to provide information and resources that help citizens understand the importance of correctly separating waste and contributing to the recycling process. Awareness programs promote sustainable practices in the home, thus encouraging responsible behavior that positively impacts the environment. 

The formation of a culture of recycling among the population allows not only to improve the recovery rates of materials, but also to generate a sense of shared responsibility in the fight against plastic pollution. A comprehensive educational approach can lead to greater citizen participation and more effective waste management, benefiting both the environment and the local economy. 

Reverter Industries Recycling Plants: Solutions for All Materials 

At Reverter Industries we have specialized recycling plants for all types of materials, offering comprehensive solutions that cover the complete waste management cycle. Our facilities are designed to treat metals, paper, cardboard, glass, industrial waste and, of course, all types of plastics. 

Our plastic recycling plants are equipped with state-of-the-art technology to process the main polymers: PET, HDPE, PVC, polypropylene and other plastic materials that are difficult to recover. Thanks to our sorting, washing, shredding and granulation processes, we transform plastic waste into high-quality raw material, ready to be reincorporated into the industrial production chain. 

At Reverter Industries, we believe that the circular economy starts with the right infrastructure. That is why we are continuously investing in expanding our treatment capacity and developing new recycling lines that meet the needs of the market and the environmental objectives of our customers. If you are looking for a reliable industrial partner for the management and recycling of your plastic waste or other materials, at Reverter Industries we have the solution.