Buddle

Also known as	Buddling, Round buddle
Category	Ore Processing

A shallow, usually circular pit in which crushed ore was washed and mechanically stirred so that heavier mineral settled out from lighter waste by gravity.

Historical usage

Buddling developed mainly in Cornwall for concentrating tin ore, and spread from there to lead, zinc and copper dressing floors across Britain through the 18th and 19th centuries; most surviving examples are the circular, mechanically-raked Victorian design.

How it worked

Crushed ore in suspension, typically fed from the stamps, was run into the buddle and spread across its sloping floor. Rotating brushes or rakes, often driven by a waterwheel, kept the mixture gently stirred while a steady flow of water washed the lighter waste material outward and away, leaving the denser, valuable ore to settle near the centre or inlet, where it could be shovelled out.

Why it was used

Buddling used gravity and a controlled flow of water to do the separating work, needing little beyond the pit itself, a water supply and (commonly) a small amount of water-wheel power — a comparatively cheap, low-technology way to concentrate ore before smelting.

Risks & limitations

Buddling was labour-intensive to load, tend and clear, needed a reliable water supply, and its gravity-based separation was relatively crude compared to what followed it: from the late 19th century, buddles were progressively superseded by American-invented mechanical concentrators — first the Frue vanner, later the Wilfley shaking table — which achieved better recovery with less manual handling.

Regional variation

Round buddles of the kind common in Cornwall and the Pennines were one of several related gravity-dressing devices; a related, freestanding, all-wooden Cornish variant used on tailings was known as a round frame.

Diagrams

A cutaway diagram of a round buddle pit, from E. Henry Davies' 'Machinery for Metalliferous Mines' (1902). — E. Henry Davies, 1902, public domain, via Wikimedia Commons

Mines associated with this term

Included only where MineArchive's own research gives a reasonable evidential basis — not every mine where this might plausibly apply.

Killhope Lead Mine — County Durham (surviving physical example)
Killhope's restored site includes a surviving buddle house among its ore-dressing structures.
Minera Lead Mines — Wrexham (surviving physical example)
Minera's dressing floor remains include buddle structures.

Sources

(secondary) Buddle pit — Wikipedia

Record created: 20 August 2026 · Last researched: 20 August 2026