抄録
The iron and steel industry in Japan was full of great difficulties for several years after the cessation of World War-I due to social chaos, shortage of coal and electric power which are the prime moving power of industries, and poor qualitif; s of raw materials.
However, with the importation of iron ores from Feb.1948, the iron and steel industry gradually started to rehabilitate to its normal production. Furthermore, after 1949 with the kind assistance of the United States of America, it was possible to modernize the steel making facilities and improve its operation by introducing the American technical “know-how”. Especially, by using fuel oil for firing the open hearth furnaces, its operation were greatly rationalized by controlling its operation with instruments and also adopting the epoch making process of oxygen steelmaking method, both of which greatly contributed in improving the efficiency cf steel making.
Consequently some of the shops in Japan has achieved an excellent record with such low fuel consumption rate of 700,000 Kcal per ton of steel, which is the highest standard in the world. With the blowing-in of the converter in Japan belonging to Nippon Steel Tube Co. for the first time in 1949 since the end of the war, the blowing of open hearth furnaces and the adoption of oxygen steelmaking process, there has been made a remarkable progress in the quality and production of steel ingots.
Thus the production of steel ingots in 1953 has, broke the record of 7,650,000 tons and exceeded it with the operation of only 56% of the total furnaces in Japan. Today Japan has completely recovered from the chaos of war in the field of steelmaking and the author took this opportunity to report the development in technical progress.
