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In machining, automotive parts manufacturing, foundries and metal cutting industries, aluminum chips, steel chips, cast iron chips, copper chips and brass chips often contain cutting fluid, coolant or lubricating oil. If these metal chips are stored, transported or remelted without proper treatment, they can increase handling cost, reduce melting efficiency and lower the selling price of the scrap.

For recycling companies and machining factories, high oil content in metal chips is not a small issue. It directly affects scrap value, workshop cleanliness, transportation safety and remelting performance. This is why more companies are using a Scrap Briquetting Press to compress oily metal chips into high-density briquettes and recover part of the cutting fluid.

High oil content in metal chips usually comes from cutting fluid, coolant, emulsion or lubricating oil used during machining. Different machining processes create different chip conditions.

For example, CNC machining centers, lathes, milling machines and drilling machines use coolant continuously when processing aluminum, steel or cast iron parts. The chips produced during machining carry out a certain amount of liquid. If the factory does not use centrifugal de-oiling, filtration or briquetting treatment, the chips may keep a high level of coolant or oil.

Chip shape also matters. Long curled chips, tangled chips and mixed chips tend to carry more liquid, while short chips and dry powder-like chips are usually easier to process. Therefore, before choosing a metal chip briquetting solution, it is important to confirm the material type, chip shape, oil content and required capacity.

The higher the oil and coolant content, the lower the actual metal content. Recyclers and smelters pay for metal value, not oil or water. Therefore, metal chips with high oil content are often purchased at a lower price, and buyers may deduct moisture, oil and impurity losses.

Loose oily metal chips take up more space and may drip during storage or transportation. Oil leakage can make trucks, containers and workshop floors dirty, increasing environmental and cleaning pressure. For long-distance transportation or export, high liquid content also reduces loading efficiency.

When oily metal chips are charged into a furnace, oil and moisture must evaporate or burn first. This can create smoke, odor and unstable furnace conditions. For aluminum chips and light metal chips, high oil or moisture content requires more careful remelting management. Loose chips also have a larger surface area, which may increase oxidation loss.

If oily chips are stored for a long time, they may cause floor contamination, odor, agglomeration or impurity mixing. For companies that need cleaner production and better environmental management, oily metal chips should be collected and treated in a more standardized way.

A metal chip briquetting press uses hydraulic pressure to compress loose chips into high-density cylindrical or block-shaped briquettes. During compression, part of the cutting fluid, coolant or oil is squeezed out and collected through a drainage system.

1. Higher chip density
After briquetting, loose metal chips are greatly reduced in volume. They are easier to stack, store and transport. For aluminum chips, steel chips, cast iron chips and copper chips, briquettes are more like standardized furnace material.

2. Cutting fluid and coolant recovery
The liquid squeezed out during briquetting can be collected and reused or treated. For machining factories, coolant recovery can reduce consumption cost and improve workshop conditions.

3. Better remelting performance
High-density briquettes are easier to charge into the furnace and reduce scattering and oxidation. Compared with loose chips, briquetted metal chips are usually more stable during remelting and may help improve metal recovery value.

4. Higher scrap selling price
For downstream recyclers and smelters, briquettes are easier to weigh, transport and charge into furnaces. Compared with loose oily chips, briquetted scrap usually has better market acceptance and stronger bargaining power.

Aluminum chips are light, loose and easy to oxidize, and they often contain coolant. After being processed by an Aluminum Chip Briquetting Press, the density increases and transportation becomes easier. For aluminum processing plants, briquetting can significantly improve chip storage and selling value.

Cast iron chips are usually smaller and can be formed well by briquetting. A Cast Iron Briquetting Machine can press cast iron chips into dense briquettes for remelting in foundries. Briquetting also reduces dust and scattering during transportation.

Steel chips may include short chips, long curled chips and mixed chips. Long curled steel chips may need to be crushed or loosened before entering a Metal Chip Briquetting Press. After briquetting, steel chips are easier to store, transport and recycle.

Copper chips and brass chips have higher material value. Oil content and material loss have a greater influence on recycling profit. Briquetting can reduce loose chip loss, increase value per unit volume and make high-value metal chips easier to sell and remelt.

If metal chips contain a high level of oil or coolant, companies should not sell or remelt them directly without evaluation. The following points should be checked first.

Different materials have different briquetting results. Customers should confirm whether the material is aluminum chips, steel chips, cast iron chips, copper chips or mixed chips. Chip shape should also be checked, such as short chips, long curled chips, powder or tangled material.

The oil content before briquetting directly affects briquette quality and final residual liquid. If the customer requires a specific result, such as residual coolant after briquetting ≤2%, it should be evaluated according to the original liquid content, pressing force, holding time and drainage structure.

Small machining workshops can choose a lower-capacity briquetting press. Medium and large machining factories, foundries or recycling companies should select a larger model according to hourly capacity. For higher automation, the machine can be equipped with a hopper, screw feeder, lifting conveyor and PLC control system.

If the main material is oily chips, the drainage and liquid collection design should be considered carefully. A good drainage system can reduce workshop pollution and help recover cutting fluid.

Wanshida provides different models of Scrap Briquetting Press and Hydraulic Metal Briquetting Machine for aluminum chips, steel chips, cast iron chips, copper chips and brass chips. The equipment can be customized according to material type, capacity requirement, briquette size, voltage standard and feeding method.

For oily metal chips, we suggest customers provide material photos, videos or sample information before model selection, including:

• Metal chip material
• Chip shape
• Hourly capacity
• Whether the chips contain coolant or oil
• Required briquette size
• Whether screw feeder, lifting conveyor or level sensor is needed

With around forty years of experience in hydraulic scrap metal recycling equipment manufacturing, Wanshida has a professional factory and engineering team to provide customized solutions. CE and ISO9001 certification support can also be provided. Whether the customer is a machining workshop, foundry, automotive parts factory or scrap recycling yard, we can recommend a suitable metal chip briquetting solution according to the actual working condition.

High oil content in metal chips can reduce scrap value, increase transportation cost, affect melting efficiency and create workshop management problems. Through briquetting, companies can increase chip density, recover part of the cutting fluid, reduce storage space and improve the selling and remelting value of metal scrap.

For companies that want to reduce scrap handling cost and improve metal recovery efficiency, choosing the right Scrap Briquetting Press is not just about adding one machine. It is about building a cleaner, more efficient and more valuable metal chip recycling process.