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Related to puddling: Puddling furnace


see Henry CortCort, Henry,
1740–1800, English inventor. He revolutionized the British iron industry with his use of grooved rollers to finish iron, replacing the process of hammering, and through his invention of the puddling process.
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a metallurgical process for the conversion of pig iron into mild, low-carbon iron, produced in a pastelike state on the hearth of an internally fired reverberatory (puddling) furnace. Puddling, which replaced bloomery conversion, was characterized by higher productivity, and it also permitted the replacement of expensive and scarce wood charcoal with coal and other types of fuel. A reverberatory furnace was used for the first time to produce wrought iron in England in 1766 by the brothers T. and D. Cranedge, who used coal as a fuel. The process was perfected in 1784 by H. Cort, who played a major role in the widespread adoption of the process.

In essence, the process requires that pigs of iron be loaded onto the hearth of a puddling furnace. The molten metal and slag found in the furnace are stirred (puddled) with metallic rods in order to increase the contact surface. The small lumps of iron formed on the furnace hearth are rolled onto a rod to form a bloom, usually 40–60 kg in weight. The bloom is then removed from the furnace, hammered, and conveyed to rolling. Puddling iron is readily welded or worked into shapes and contains little phosphorus or sulfur and few nonmetallic inclusions.

Having come into widespread use at the beginning of the 19th century, puddling was the basic method of producing large quantities of iron and steel. During the second half of the 19th century, the more advanced converter process (seeBESSEMER PROCESS) and open-hearth process of converting pig iron into steel began replacing puddling. Puddling has not been used in the USSR since the 1930’s.


Metallurgiia stali. Moscow, 1961.
Ocherki istorii tekhniki v Rossii (1861–1917). Moscow, 1973.
Mezenin, N. A. Povest’ o masterakh zheleznogo dela. Moscow, 1973.



A process for the production of wrought iron by agitation of a bath of molten pig iron with iron oxide in order to reduce the carbon, silicon, phosphorus, and manganese content.

puddle, clay puddle, puddling

Clay to which a little water has been added and which then has been tempered, to make it homogeneous and to increase its plasticity; used to prevent the passage of water.


1. Inducing compaction in mortar or concrete by the use of a tamping rod.
2.See puddle.
References in periodicals archive ?
The Mahindra 575 is a clear validation of this focus and offers the highest level of mechanisation for puddling operations ensuring higher productivity for farmers engaged in paddy cultivation.
The Mahindra 575 in the 45 HP category, is a tractor with full cage wheel suitable for deep puddling operations needed for paddy cultivation in Andhra Pradesh.
Puddling breaks down, smears, and disperses soil aggregates.
This paper describes a method to quantify puddling intensity and reports on the effect of puddling on soil dispersion and hydraulic conductivity/percolation rates as well as changes in soil physical properties during drying of the puddled layer.
The laboratory puddling apparatus used steel rods as puddling implements, attached to a disk driven by a controlled constant speed DC-motor (Fig.
The puddling ratio ranges from 0 for an unpuddled soil to infinity for a soil that was 'completely puddled'.
The puddling talents, on the other hand, don't produce the value, aren't stable and can be used only to make steel.
Soil puddling degrades soil structure and leads to reduced infiltration rates.
A potential strategy to minimise soil structural degradation in rice-based cropping systems is a reduction in soil puddling (So and Woodhead 1987).
A rice-mungbean crop rotation was simulated under controlled conditions to evaluate the impact of 2 different puddling intensities on the growth and yield of rice and mungbean on 3 different-textured soils.
Puddling treatments were applied on 9 and 10 August 1993 and rice seedlings transplanted 1 week later (16 August 1993).
2) Richard McCombs, owner of Oaks Drain Service in Thousand Oaks, suggests that homeowners with yards with low-lying areas subject to puddling buy a utility pump in preparation for El Nino's arrival.