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CaCO3 계 Flux Injection 에 의한 용선의 탈황에 대한 연구
민병진,노광현,강길원 대한금속재료학회(대한금속학회) 1985 대한금속·재료학회지 Vol.23 No.3
An injection method using CaCO₃powder and other additives as fluxes was employed for the desulfurization of molten pig iron. The results are as follows: 1. The injection method using CaCO₃powder appeared to have a very effective desulfurization by forming the porous and active fine CaO particles and stirring effect due to CO₂gas formed when CaCO₂gas formed when CaCO₃decomposed 2. Partially substituting of CaCO₃with CaO decreased the desulfurization degree as the content of CaO increase. This means that the ability of desulfurization of CaCO₃is superior to CaO. 3. All addition as reduction agent (deoxidizer) improved the desulfurization degree and this is attributed to the promotion of decomposition reaction of CaO into Ca+O by lowering the oxygen chemical potential with formation of Al₂O₃. De-si and de-Mn reaction, however, were suppressed by the Al addition.
민병진 만주학회 2023 만주연구 Vol.- No.36
This article probes the intricate collaboration between the central government of Manchukuo and local elites in the 1930s. It specifically examines the Hoko (Baojia, 保甲) system, exploring how this system fostered and facilitate these relationships, culminating in the establishment of robust local partnerships and regional organs instrumental in performing crucial managerial and administrative tasks. The Hoko system emerged as a pivotal conduit for building solidarity between local elites and the new state power of the era. It was meticulously tailored to cater to major societal imperatives: public safety. The system, embodying a necessarily flexibility, was strategically oriented towards augmenting the efficient use of resources to bolster and maximize self-defense measures and streamline administrative functionalities. Though the Hoko system began as a collaborative effort at inception, is also encountered challenges. Competition between local governments and elites over power and autonomy eventually strained their relations. This adversarial dynamic led to the system’s instrumental use for profiteering at the expense of the local residents. Consequently, despite the Hoko’s initial successes, it transcended its initial objectives and subsequently made way for the implementation of the Gaison system.