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Most previous furnaces couldn't attain excessive enough temperatures to melt the steel. All of those temperatures may very well be reached with historical methods used because the Bronze Age. Small quantities of iron have been smelted in ancient instances, within the stable-state, by heating the ore in a charcoal fireplace and then welding the clumps along with a hammer and in the method squeezing out the impurities. Manning, Charlotte Speir. Ancient and Mediæval India.
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