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Grog from Fired Clay
Clay

Imeundwa na

Clay

11. Oktoba 2026DK
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Grog from Fired Clay

Grog is clay that has already been fired and then crushed. Mixed into raw clay it opens the body, cuts shrinkage and cracking, and lets steam out as the piece dries and fires, which is why crucibles, kiln bricks and big pots are full of it. It is made by firing lumps of the same refractory clay, or by crushing broken unglazed pots.
Mwanzo
A day, plus a kiln firing

Maagizo

1

Make lumps

Wedge refractory clay into fist-sized lumps and let them dry completely.

Vifaa kwa hatua hii:

Udongo Unaostahimili MotoUdongo Unaostahimili Moto10 kg
MajiMaji1 lita

Zana zinazohitajika:

Birika la kuchanganyiaBirika la kuchanganyia
2

Fire them

Fire the dry lumps in the kiln, raising the heat slowly at first so they do not burst.

Zana zinazohitajika:

TanuruTanuru
Kipima joto kaliKipima joto kali
Vifaa vya ndani ya tanuruVifaa vya ndani ya tanuru
3

Crush

Put the cold lumps in a sack and break them with the sledgehammer; finish small pieces in the mortar. Wear a dust mask and glasses.

Zana zinazohitajika:

Gunia la kuhifadhia la hessianGunia la kuhifadhia la hessian
Nyundo kubwaNyundo kubwa
Kinu na mchiKinu na mchi
Barakoa ya vumbiBarakoa ya vumbi
Miwani ya usalamaMiwani ya usalama
4

Sieve into sizes

Sieve through the graded sieves and keep each size apart: coarse grog for bricks, fine grog for crucibles and thin pots. Re-crush what is too big.

Zana zinazohitajika:

Seti ya chekecheke (matundu ya viwango)Seti ya chekecheke (matundu ya viwango)
Barakoa ya vumbiBarakoa ya vumbi
5

Store dry

Store each size in its own lidded bucket, labelled with the clay and firing it came from.

Zana zinazohitajika:

Ndoo ya chuma yenye mfunikoNdoo ya chuma yenye mfuniko

Vifaa

2

Zana Zinazohitajika

11

Mchoro huu unatengeneza

Thumbnail
Kishikilia nafasi

Grogi (vyombo vya udongo vilivyochomwa na kupondwa)

Free

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Thumbnail
Kishikilia nafasi

Kifuta ubapa wa udongo

Free

99
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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Making a Clay Crucible for Smelting — The Vessel That Holds Molten Metal

Making a Clay Crucible for Smelting — The Vessel That Holds Molten Metal

na ForgeNO

Uchimbaji chuma

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