小野田セメント製造株式會社におけるセメント焼成窯の種類と操業状況

概要

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Throughout the changes of cement manufacturing techniques in the Meiji and Taisho eras, the history of Onoda Cement Corporation, the resources and material left with them were examined in order to find out a part of Japan's modernization. The material includes the transition of the amount of cement, manufacturing process, energy cost, operating term etc. according to the change of kiln types between 1883 and 1923. The following findings were obtained: 1) Although the cement manufacturing process in bottle kilns, batch system, was consisted of 1) filling raw materials into the kiln, 2) firing, and 3) taking cement clinker out of the kiln, there was not precise manufacturing process in Dieztsch's ones and the revolving ones which systems were continuous. 2) While the operating cycle of Bottle kilns was about ten days, Dieztsch's ones run approximately half a year. Rotary ones paused four days a month for mechanical repairs in 1912. 3) By the end of the Taisho era, along with the changes of firing kiln, the cement manufacturing productivity increased sixty times, and the labor productivity for each person improved rapidly seven times as those of the establishment. 4) The fuel and labor cost accounted for a majority of all the manufacturing cost. 5) The manufacturing capacity, the productivity, and the cost were improved with the times.
2006-11-30