23th of February 2026
Sustainability is no longer a voluntary add-on in industry. It is increasingly being demanded – by customers, by partners, along the supply chain, and through regulatory frameworks. At the same time, many companies face a dilemma: sustainability targets must be achieved without jeopardizing production processes, allowing investments to spiral, or adding further operational complexity.
This article demonstrates why the briquetting of metallic production residues is a particularly effective and practical ESG lever. It addresses an area where relevant material flows arise in nearly every metalworking operation: metal chips, dusts, and sludges. By compacting, dewatering, and structuring these materials, measurable ecological effects can be achieved – while delivering economic benefits and requiring minimal intervention in core production.
ESG: From buzzword to management responsibility
The term ESG – Environmental, Social, Governance – has, in recent years, moved from the financial markets into everyday industrial practice. What originally primarily concerned investors and publicly listed companies now also affects the industrial SME sector.
The reason is clear: ESG requirements are increasingly passed along the value chain. Companies are confronted with questions such as:
- How do you handle your resources and waste?
- What are your recycling or recovery rates?
- Which concrete measures reduce environmental impacts in production?
What is crucial here is this: Even companies that are not (yet) subject to reporting obligations must provide data – for example to customers who are required to meet ESG standards, or in the context of tenders, audits, and supplier evaluations.
ESG thus becomes a management responsibility. It is less about communication and more about structures, processes, and reliable key figures.
What is required are concrete figures:
- Quantities
- Rates
- Continuous improvements
- Before/after effects
The dilemma of many industrial companies
In practice, a recurring pattern can be observed: many sustainability measures fail not because of a lack of will, but because of feasibility.
Typical hurdles include:
- High investment costs
- Interventions in ongoing production processes
- Long project durations
- Unclear or difficult-to-validate data situations
Especially in automated, cycle-based production environments, the willingness to change proven processes is low. Sustainability is then quickly perceived as an additional burden – rather than an opportunity.
The underestimated lever: metallic production residues
Regardless of industry or product, relevant residual materials arise in nearly every metalworking industrial operation:
- Metal chips (e.g., steel, aluminum, non-ferrous metals)
- Grinding dusts and grinding sludges
- Oil- or emulsion-containing residues
These materials are often not a core topic for the company – yet they cause effort, costs, and logistical complexity. At the same time, they possess considerable material value and influence several ESG-relevant indicators simultaneously (waste volume, hazardous material classification, transport, circularity).
Briquetting: sustainability where it becomes tangible
Briquetting describes the compaction of loose metallic production residues into dimensionally stable, standardized briquettes. What initially sounds technical unfolds in practice as a very concrete effect – particularly in the ESG context.
Massive volume reduction and logistical effects
Through briquetting, the volume of metal chips decreases significantly. In practice – for example with aluminum chips – volume can be reduced by a factor of 10.
This directly leads to:
- Significantly fewer container or skip changes
- Fewer transports
- Reduced space requirements within the plant
- Reduced internal handling
These effects are not only operationally noticeable, but also easy to measure – a clear advantage for ESG verification.
Lower residual moisture and improved material quality
During the pressing process, a large proportion of adhering coolants is squeezed out. The result is briquettes with significantly lower residual moisture compared to loose chips or sludges.
For companies, this means:
- Less oil- or emulsion-containing waste
- Improved traceability and recyclability of the material
- More stable quality for recycling or melting processes
- Lower disposal and treatment costs
Sustainability thus becomes part of an economically sound material strategy.
Grinding sludge: from hazardous substance to manageable residue – and a source of recovered coolants
A particularly practice-relevant effect of briquetting becomes apparent with grinding sludges. In loose, wet form, these are often considered dripping and are accordingly classified as hazardous material – with far-reaching consequences for disposal, transport, documentation, and costs.
Through the briquetting of grinding sludge, several effects are achieved simultaneously:
- Free liquid is pressed out
- The sludge is no longer dripping
- The waste code can change
In addition – and for many operations this is the decisive economic lever – valuable coolants (oil or emulsions) are pressed out of the sludge during the pressing process. These can be collected, treated, and returned to the production process.
In practice, this means:
- Lower disposal costs due to changed classification
- Reduced regulatory effort (hazardous material handling, transport requirements)
- Reduced coolant consumption through recovery
- Simplified logistics and clean, manageable residues
Briquetting of grinding sludge therefore operates on two levels: it reduces risks and costs in disposal and transforms a previously lost media component into a recoverable valuable resource – a clearly measurable ESG effect, both ecologically and economically.
For sustainability to become manageable, key performance indicators are required. Briquetting provides a very solid basis for this, as much of the data already arises within operations.
Typical KPIs include:
- Number of container or skip collections
- Disposal volume (t/month)
- Volume of residues (m³)
- Transport effort
- Recovery or recycling rate
- Revenues from metal recovery
- Recovered media (oil/emulsion)
These key figures can be clearly documented, compared, and improved over time. Sustainability thus becomes operationalized – rather than merely described.
RUF Maschinenbau: briquetting as an industrially proven solution
As a global leading manufacturer of briquetting solutions, RUF Maschinenbau has been developing systems for decades specifically designed to meet the requirements of metalworking companies: robust, automatable, and integrable into existing production environments.
The approach is deliberately practice-oriented:
- Modular briquetting presses for metal chips and sludges
- Well-designed peripheral systems (conveying technology, buffers, automation)
- Compact design
- Simple operation
- Possibility of material testing and trial pressing
The objective is to transform heterogeneous metallic residues into structured, usable material flows – thereby implementing sustainability effectively in everyday industrial operations.
ESG is not an end in itself. For industrial companies, what matters is that measures are:
- Measurable
- Economically viable
- Operationally feasible
The briquetting of metallic production residues fulfills precisely these criteria. It reduces volume, lowers residual moisture, simplifies disposal logic (including potential changes to waste codes), enables the recovery of valuable coolants, and strengthens circularity – without modifying core production.
Sustainability thus becomes not an additional burden, but an integral component of efficient industrial processes. This is precisely where the added value of briquetting solutions from RUF Maschinenbau lies: technical expertise combined with a clear understanding of industrial realities.
