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Tuyere Iron: a Slotted Grate Cast in Grey Iron
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Forge

Created by

Forge

18. October 2026NO
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Tuyere Iron: a Slotted Grate Cast in Grey Iron

The tuyere is the opening in the bottom of the forge fire through which the blast is blown. Bacon (1919): its openings must let the blast through easily while keeping cinders from dropping into the blast pipe, and there should be a way to open the pipe below and clear out the cinders that still get through. This one is a slotted grate over a socket for the blast pipe, cast in grey iron. The design and sizes are ours. The picture: our drawing.
Advanced
2 days

Instructions

1

Make the pattern

From pine, make a pattern of a square plate about 15 cm across and 2 cm thick with four or five narrow slots, and a short round socket under its centre to take the blast pipe. Taper every side slightly so it draws from the sand.

Tools needed:

Pine BoardPine Board
Coping SawCoping Saw
Chisel Set - WoodChisel Set - Wood
Wood GlueWood Glue
Digital Caliper 6-InchDigital Caliper 6-Inch
2

Ram the mould

Ram the pattern up in casting sand in the flask, draw it out, and cut a sprue and a runner to the cavity.

Tools needed:

Casting SandCasting Sand
Moulding FlaskMoulding Flask
Hand TrowelHand Trowel
3

Melt the iron

Melting pig iron in the cupola and tapping it into the ladle.
4

Pour

Pour the molten grey iron from the ladle into the sprue in one steady stream until the mould is full; about 4 kg with the sprue (our estimate). Let it cool in the sand.

Materials for this step:

Pig Iron IngotsPig Iron Ingots4 kg

Tools needed:

Foundry LadleFoundry Ladle
Moulding FlaskMoulding Flask
Welding GlovesWelding Gloves
Leather ApronLeather Apron
Face ShieldFace Shield
5

Clean up

Shake out the casting, cut off the sprue, grind the fins and brush off the sand. Check that every slot is clear.

Tools needed:

Angle GrinderAngle Grinder
Wire Brush SetWire Brush Set
Welding GlovesWelding Gloves
Face ShieldFace Shield
6

Set it in the forge

Set it in the hearth with the blast pipe in its socket and a way to open the pipe below for clearing cinders. Richardson's forge had its tuyere iron four inches below the hearth surface.

Tools needed:

Digital Caliper 6-InchDigital Caliper 6-Inch

Materials

1

Tools Required

14

This blueprint makes

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Tuyere Iron

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