Iron is dispersed in nature very extensive, but the mankind discovers and apply iron to want than gold and copper however late. It is above all
Iron is because of the iron of natural simple substance condition on the earth very exiguous, and it oxidizes simply rust, the melting point that increases it (1812K) compare copper again (1356K) get high much, make it compares copper be hard to fusion. The iron that the mankind discovers the earliest is from celestial fallen aerolite, percentage of the ferreous in the aerolite is very high, it is the mixture of the metal such as iron and nickel, cobalt, did not come out in the method of melt iron ore, the mankind gains the time of cast iron a lot of more impossibly, iron is regarded as a kind of the most precious metal that contains mysterious sex all the time.
Discover the earliest and person of Xi Yahe ladder masters puddling skill. Our country has puddling from the Eastern Zhou Dynasty, pervade to times of age the Warring States, it is one of countries that master skill of smelt metal iron earlier. The make period in age the Warring States presents the iron that our country exercises the earliest artificially. This bar that from Jiangsu grave of 6 age adding up to a county comes up out of land, Tie Wan, the Tie Ben that with ash of early days of Henan Luoyang the Warring States hole comes up out of land all can be certainly up to now our country's earliest cast iron thing. Cast iron exercises skill appear, its effect to the feudal society and steamer can compare the United States to the effect of capitalist society.
The discovery of iron and large-scale apply, it is the mankind is begun history the milepost of a ray that go up, it takes the mankind to ironware times from times of Stone Age, bronze ware, drove the mankind to be begun civilizedly. Up to now the cause that iron remains modernization to learn industry, the metallic stuff with human advancement indispensable place.
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