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무산화 직화로 버너의 연소특성이 강재표면의 산화에 미치는 영향
박홍수,유갑종,Park, Heung Soo,Riu, Kap Jong 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.3
An experimental study for the two types of burners used in the non-oxidizing direct fired furnaces of the heat treatment process for the cold rolled plate has been carried out to investigate the combustion characteristics and the oxidization of the surface of steel plate. A steep temperature gradient and entrainment of residual oxygen were found near the heating surface in the flame of the nozzle mixing burner which has strong swirl velocity component. It was concluded that the elimination of the residual oxygen and the increase of the temperature of combustion gas on the heating surface are needed to enhance the performance of the burners for application to the non-oxidizing direct fired furnaces.
박홍수 대한자원환경지질학회 1999 자원환경지질 Vol.32 No.1
Coal properties are controlled by the following two factors : One is the maceral components and the other is the degree of coalification. In other words, even if coals in question indicate the same degree of coalification, their chemical and physical properties considerably vary one another when their maceral components are different. It is well known that virtrinite reflectance is the best single criterion for the degree of coalification covering the whole range of coal rank. Some authors have recently insisted that sporinite fluorescence is more leliable coal rank parameter than vitrinite reflectance in case of low rank coals. In this paper, to examine the relince of sporinite fluorescence as coal rank parameter, fluidity analysis of coals is newly performed and the data are analyzed in comparision with those of virinite reflectance, sporinite fluorescence and maceral components. The results of this study are as follows; 1) Vitrinite reflectance becomes low when degradinite content is high within one columnar samples, and vice versa. 2) variation of vitrinite reflectance depend on degradinite content and on difference of roiginal plant. 3) In dealing with the Japanese paleogene coals, sporinite fluorescence is more reliable parameter indicating the degree of coalification than vitrinite reflectance. 4) Maximum fluidity increases exponetially in proportion to the increases of degradinite content.
지방산 카르바미드/왁스/아크릴 공중합체의 블렌드에 의한 내구유연발수제의 제조에 관한 연구(II) -면직물에의 발수처리-
박홍수 한국섬유공학회 1993 한국섬유공학회지 Vol.30 No.12
To prepare a durable softening water repellant(PADWC), quaternized octadccyl methacrylate-2-dieth-ylaminoethyl methacrylate(ODMAC) as a mother resin and quaternized fatty carbamide(DACDC) which increase the softening effect and the hydrostatic pressure. Were blended with waxes and their emulsifier in various and improved tear strength and crease recovery. There was no significant lowering effect in water repellency when PADWC was applied with the antistatic agent by the one-bath method, and the effect of catalyst on water repellency was studied. Decrease of the color fastness to crocking of dyed textiles was not significant when durable softening water repellent PADWC was used. And the water repellency mechanism of cotton fabrics treated with PADWC was also discussed in detail.