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Aluminium Powder: Molten Aluminium Shot into Water, then Stamped
Aluminium powder is the fuel of the thermit reaction that turns metal oxides into metal. Thorpe (1912) gives how it was made: molten aluminium poured into water, and the small irregular fragments, once dry, pounded under stamp-mills until fine enough. Molten metal and water: face shield, gloves, and pour slowly. Keep the powder away from flame.
The picture: aluminium powder (Wikimedia Commons).
中级
1 day
说明
1
1
Melt the aluminium
Melt the aluminium
Melt 200 g of aluminium in a crucible in the furnace.
此步骤所需材料：
铝锭200 克所需工具：
等臂天平
坩埚
木炭坩埚炉
坩埚钳
面屏
皮手套2
2
Pour it into water
Pour it into water
Stand back behind the face shield and pour the metal slowly, in a thin stream, into a bucket of cold water. It sets as small irregular fragments.
所需工具：
水
带盖金属提桶坩埚钳面屏皮手套3
3
Dry the fragments
Dry the fragments
Lift the fragments out with a skimmer and dry them completely.
所需工具：
漏勺4
4
Stamp to powder
Stamp to powder
Pound the dry fragments under the stamp mill until the powder is fine. Sieve, return the coarse part to the stamps, and keep the powder in a closed jar.
所需工具：
捣矿机
细筛
带盖玻璃罐此蓝图制作
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