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Updated: June 5, 2025
The charcoal packing behind the carbon plates is required to confine the heat and to protect them from combustion. With this furnace, aluminum can be reduced directly from its ores; and chemical compounds from corundum, cryolite, clay, etc., and silicon, boron, calcium, manganese, magnesium, and other metals are in like manner obtained from their ores and compounds.
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