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OTANI STEEL CORPORATION
To view a brief explanation of a process, click the icon for the process you want to hear about.
Materials acceptance - charging rrSteelmaking process rrContinuous casting process rrRolling process rrShearing - shipping
Materials acceptance
Acceptance checking is carried out on the materials used to manufacture products, and only materials that have passed the checks are so identified and then stored in the appropriate area according to grade and intended use.
Charging
The correct steel scraps are chosen from the 16 areas where scrap is stored according to the grade intended use, and put in buckets ready to be loaded into the electric arc furnace.
Weighing and blending steel scraps
We use a unique calculation method that divides 80 tons of scrap steel into three lots, to be weighed and blended.
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Melting and refining
The loaded scrap steel is melted in the electric arc furnace, and refined to remove impurities. Pure steel is the result.
Tapping out
Once the refined molten steel is confirmed to have reached the prescribed temperature, it is transferred to the ladle.
Bubbling
Nitrogen gas is used inside the ladle to blend the contents. This process evens out the chemical constituent and temperature of the molten steel.
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Continuous casting
Continuous casting is used to cast billets (semi-finished rectangular rods) in a mold from molten steel.
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The turner
The turner changes the direction of the billets as they come from the continuous casting process, to prepare them for rolling.

The billet yard
The billet yard is where billets (semi-finished products) that were produced during the continuous casting process are stored.

Induction heating
When direct rolling is to be done, the temperature of the billets is finely adjusted, as necessary, in preparation for the rolling process.

Heating
To prepare for cold rolling, the billets are heated to the correct temperature for the rolling process.
Rolling
The billets are forged alternately vertically and horizontally on the HV stand, until they meet the rolling size required to make the desired finished product.
Slit (D10-D16)
One billet is divided lengthwise into equal left and right pieces, leading to the creation of two finished products.
Cooling
The rolled products are left standing to cool.
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Shearing
The rolled products are cut to the specified length, which can be from 3.5 m to 12 m long.
Binding and weighing
The products cut to specified length are bound with the appropriate number in each bundle, and the weight of each bundle is then checked.
Shipping
The products are delivered to the customer' designated location.
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