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Tuyere Iron: a Slotted Grate Cast in Grey Iron
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Forge

Yenziwe ngu-

Forge

18. uMfumfu 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.
Osezingeni eliphezulu
2 days

Imiyalelo

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.

Amathuluzi adingekayo:

Ipulangwe lomphayiniIpulangwe lomphayini
Isaha Se-CopingIsaha Se-Coping
Isethi yezisebenzi zokhuniIsethi yezisebenzi zokhuni
Iglu LokhuniIglu Lokhuni
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
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.

Amathuluzi adingekayo:

Isihlabathi sokubumbaIsihlabathi sokubumba
Ibhokisi lokubumbaIbhokisi lokubumba
Ifosholo LesandlaIfosholo Lesandla
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.

Izinto zokwakha zalesi sinyathelo:

Izingqumba zensimbi eluhlazaIzingqumba zensimbi eluhlaza4 kg

Amathuluzi adingekayo:

Ikhezo lokuthela insimbi encibilikileIkhezo lokuthela insimbi encibilikile
Ibhokisi lokubumbaIbhokisi lokubumba
Amagilavu okushiselaAmagilavu okushisela
Ipheshana LesikhumbaIpheshana Lesikhumba
Isivikelo SobusoIsivikelo Sobuso
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.

Amathuluzi adingekayo:

I-angle grinderI-angle grinder
Isethi yamabhulashi ocingoIsethi yamabhulashi ocingo
Amagilavu okushiselaAmagilavu okushisela
Isivikelo SobusoIsivikelo Sobuso
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.

Amathuluzi adingekayo:

I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6

Izinto

1

Amathuluzi Adingekayo

14

Le blueprint yenza

Thumbnail
Isibambeli

I-tuyere yensimbi yeziko

Free

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Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

Casting Iron in a Cupola Furnace — Re-Melting Pig Iron into Finished Castings

Casting Iron in a Cupola Furnace — Re-Melting Pig Iron into Finished Castings

ngu-PiettUS

Umsebenzi Wensimbi

45
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Brick Blacksmith's Forge with a Bottom-Blast Tuyere

Brick Blacksmith's Forge with a Bottom-Blast Tuyere

ngu-ForgeNO

Umkhandi

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