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In the era of commercial wrought iron, blooms were slag-riddled iron castings poured in a bloomery before being worked into wrought iron. In the era of commercial steel, blooms are intermediate-stage pieces of steel produced by a first pass of rolling (in a blooming mill) that works the ingots down to a smaller cross-sectional area, but still greater than 36 in 2 (230 cm 2). [1]
A bloomery in operation. The bloom will eventually be drawn out of the bottom hole. A bloomery is a type of metallurgical furnace once used widely for smelting iron from its oxides. The bloomery was the earliest form of smelter capable of smelting iron. Bloomeries produce a porous mass of iron and slag called a bloom.
Thick slabs are available up to 2200×450 mm at a specific steel facility, generically ranging typically from 200mm to 300mm; Thin slabs (low-carbon steel): 1680×50 mm at a specific facility, generically ranging from 40mm to 110mm thick depending on an individual machine's design [1] [3] Conventional bloom casters cast sections above 200×200 mm.
Khouzestan Steel Company produces three main products: [3] Billet, also known as bloom, is an intermediate product of steel rolling with a cross-sectional area smaller than 230 square centimeters. The cross-sectional shape of this product is either circular or square with a width of less than 15 centimeters.
Blooms are hot or cold rolled into structural steel, such as I-beams and rails. In modern steel mills these processes often occur in one assembly line , with ore coming in and finished steel products coming out. [ 17 ]
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Once the iron has converted to steel, the clay vessel is broken and the steel bloom removed. Typically ten tons of iron sand yield 2.5 tones of tamahagane, or raw steel. This smelting process thus differs considerbly from that of the modern mass production of steel, and also differs from contemporary Chinese and Korean methods.
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