How do we smelt aluminum in ancient times?

How do we smelt aluminum in ancient times?



In ancient times, it could not electrolysis, but there was still a little aluminum.

Legend has it that Napoleon and his knives and forks are made of aluminum. At the banquet, he provided gold tableware for most guests, and only a few guests used aluminum tableware to make a deeper impression on the guests. In 1885, the top hat of Washington Monument, built in Washington, D.C., was also made of metallic aluminum. Because in the nineteenth Century, aluminum was a precious metal. The aluminum grain that people first acquired is just like a treasure, and its price is equal to that of gold. Because it is extremely difficult to extract aluminum from aluminum ores. In 1825, a small amount of pure aluminum was separated from the OE of Denmark. In 1827, hler metal potassium and anhydrous aluminum chloride reaction and prepared aluminum. But K is too expensive, so do not allow a large scale production. 27 years later, a French chemist, Deweier, heated with metallic sodium and anhydrous aluminum chloride to get a small aluminum ball that shone with metallic luster. Although the use of metal sodium greatly reduced the production cost of aluminum, it obviously did not reach the level of universal application of aluminum. In 1884, the United States Department of chemistry at Oberlin College, a young student named Charles Martin Hall. He was only twenty-one years old. Once, he listened to a professor (this professor is a student of Weller), said: "no matter who can invent a low-cost aluminum smelting method, it will get ahead." This made Holzer realize that only by exploring cheap aluminum smelting method can aluminum be widely applied. Holzer decided to run a family laboratory in his home's firewood house. He intends to apply an early David invention to melt the current into molten metal salts that can deposit metal ions on the cathode to separate the metal ions. Because the melting point of alumina was very high (2050 degrees C), he had to look for a material that could dissolve alumina and reduce its melting point, and accidentally found the Na3AlF6. The melting point of cryolite alumina molten salt is only between 930 and 1000 degrees. Cryolite is not decomposed under the electrolysis temperature and has enough fluidity. This will be beneficial t



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