囘轉爐製原鐵の特質

概要

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Among some kinds of raw iron made with the rotary furnace, sponge iron and loop (Luppe) belong to the principal material for steel making which may be treated similarly to scrap iron. A third product which may be regarded as the intermediate between the two can be manufactured in the actual rotary furnace operation. It is tentatively called a "Karuisi-tetu" (pumice iron). The three kinds of raw iron e. g. sponge iron, pumice iron and loop were compared as regards to their industrial characteristics and the following conclusion was obtained : The manufacture of loop is the most rational among several rotary-furnace methods and the simplest in the smelting operation. The loop manufactured under suitable conditions and in a perfect process of production, has no defect when used as material for steel making, There is no better grade of raw irons that is not dependent on the scrap iron. However, the grade of the final product of loop depends on the method for its manufacture. Therefore, a more effective development in this line should be found and some unfavorable criticisms on the loop hitherto produced would be dispelled if a standard specification for its composition is formulated.
1941-07-25