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The process of making tamahagane continues for 36–72 hours (a day and a half to three days), depending on how many people work and how much metal is to be obtained. Within an hour of smelting, the iron sand sinks to the bottom, called the bed of fire, in which it will be assessed by color to determine which parts of the smelt will be combined ...
Morioka Domain quickly expanded operations, constructing two more blast furnaces to produce 1125 tons of pig iron per year, using over 1000 workers, making it the largest smelter in Japan at the time. Although most of this iron was intended for weapons production, the domain also produced coinage on behalf of the government. When an order came ...
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Katsunori Suzuki is one of a few craftsmen in Japan still producing cast iron cookware by hand using laborious traditional techniques. ... Suzuki fetches buckets of molten iron and hurriedly ...
Early Japanese iron-working techniques are known primarily from archaeological evidence dating to the Asuka period (538–710 CE). Iron was first brought to Japan during the earlier Yayoi period (900 BCE to 248 CE). Iron artifacts of the period include farm implements, arrowheads, and rarely a knife blade.
An integrated mill with coke, iron, and steel facilities, Yahata was also responsible at this time for 80-90% of Japan's steel output. [ 4 ] [ 9 ] Energy efficiency was greatly improved by the conversion from steam to electricity as a power source, resulting in a drop in consumption of coal per ton of steel produced from four tons in 1920 to 1. ...
Steel is an alloy composed of between 0.2 and 2.0 percent carbon, with the balance being iron. From prehistory through the creation of the blast furnace, iron was produced from iron ore as wrought iron, 99.82–100 percent Fe, and the process of making steel involved adding carbon to iron, usually in a serendipitous manner, in the forge, or via the cementation process.
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