The pressing force of a metal briquetting press is a critical specification that varies enormously based on the application, material, and desired briquette density.

There is no single answer, but here is a detailed breakdown by category:

Range of Forces (General Overview)

Small-scale / Low-density: Start around 20 - 100 tons (used for loose turnings in-house to reduce volume for recycling).

Standard Industrial / High-density: The most common range for serious scrap processing is 150 - 700 tons.

Heavy-duty / Super-dense: For the hardest materials (stainless steel, Inconel, titanium) or large logs, presses range from 800 - 2,500+ tons.

Key Factors Determining Required Force

Type of Metal Material:

Soft & Ductile (Copper, Aluminum, Brass): Lower force required (e.g., 100-300 tons). These materials compress and bind together more easily.

Hard & Brittle (Cast Iron, Borings): Requires moderate force. They compact but can fracture.

Hard & Springy (Steel, Stainless Steel, Titanium Turnings): Require very high force (500+ tons). They resist compression and have "memory," needing immense pressure to form a stable, dense briquette (often called a "puck" or "log").

Form of the Scrap:

Turnings / Swarf: Long, stringy, and tangled. Require higher force to shear, compress, and interlock. Wet/oily turnings compress more easily than dry.

Borings / Shavings: Smaller and more granular. Compress more easily but still require significant force for high density.

Powders / Filings: The easiest to compact, but force is needed to achieve a metallurgically dense briquette for furnace charging.

Desired Briquette Density:

"Handle-able" Briquette: Just enough force to make a block that won't fall apart during handling (~30-60 lbs/cu ft). Lower force.

"Dense" or "Log" Briquette: Near-solid briquette (120-150+ lbs/cu ft) that minimizes oxidation, fetches maximum price from mills, and is ideal for remelting. Very high force required.

Production Throughput:

Higher force presses are built more robustly and often have larger chambers, allowing for bigger briquettes per cycle and higher hourly output.

Important Related Concepts

Compaction Ratio: This is the key metric. It's the ratio of the volume of loose scrap to the volume of the finished briquette (e.g., 8:1). Higher force enables a higher compaction ratio.

Pressure (vs. Force): Engineers often think in terms of pressure (Force/Area, measured in psi or bar). The required pressure for steel can be 20,000 - 45,000 psi (1,400 - 3,100 bar) or more in the compression chamber. The total force (in tons) is this pressure multiplied by the cross-sectional area of the briquette.

Hydraulic System: These forces are achieved using powerful hydraulic systems. The pressure in the hydraulic lines (e.g., 3,000 psi) is amplified by the size of the hydraulic cylinders to generate the massive tonnage at the ram.

Conclusion

To determine the right pressing force for your needs, you must consider:

What is your primary material? (e.g., Stainless steel requires much more force than aluminum).

What is your volume and throughput requirement?

What density do your buyers (or your melting furnace) require?

A practical approach: Consult with major briquetting press manufacturers (like PRAB, Ruf, Metso, Orwak, etc.). They will typically ask for a sample of your material to test in their lab and recommend the appropriate model and force required to achieve your goals.

In short: while 200-400 tons is a common industrial range, always size up based on your toughest material, as higher force gives you more flexibility and a better end product.