페로망간 집진분(集塵粉)의 재활용(再活用)에 관한 연구(硏究)

김윤채,송영준,박영구,Kim, Youn-Che,Song, Young-Jun,Park, Young-Koo 한국자원리싸이클링학회 2012 資源 리싸이클링 Vol.21 No.3

이전의 연구에서는 $Mn_3O_4$ 분진으로부터 고순도 훼로망간를 얻기 위해, Al 테르밋법이 검토되었다. 그 결과는 Mn 함유율이 약 93% 이상이고, KS D3712 규격 이하의 낮은 C, P, S의 불순물을 함유한 고순도 페로망간을 얻을 수 있음 보여주었다. 본 연구에서는 제조 코스트가 Al 분말보다 저렴한 Si 분말이 $Mn_3O_4$ 분진의 테르밋 반응법의 환원제로 검토되었다. 그 결과 환원제로 Si 분말을 단독으로 첨가할 경우는 착화가 불안정하여 테르밋 반응이 일어나지 않았으나, 환원제로 Si 분말과 Al 분말을 동시에 첨가할 경우는 C, P, S의 불순물 함유율이 매우 낮은 고순도 페로망간을 얻을 수 있었다. In order to make high-purity ferro-manganese from $Mn_3O_4$ dust, the application of aluminothermy process to the reduction of $Mn_3O_4$ dust was investigated in previous work. The result showed the fact that can be obtained high purity ferro-manganese which have over about 93% of manganese content and lower impurities such as C, P, S than those of KS D3712 specification. The addition of silicon powder instead of aluminum powder was investigated as reductant in the thermite reaction process of $Mn_3O_4$ dust in this work because its production cost is lower than that of aluminum powder. In case of addition of silicon powder only as reductant, the experimental result showed the unstable ignition and no thermite reaction of mixture, but in case of simultaneous addition of silicon and aluminum powders as reductant, showed the fact that can be obtained high purity ferro-manganese which have much low content of impurities such as C, P, S component.

인공지능기법을 이용한 맞대기용접부의 잔류응력 예측시스템 개발

김윤채,성백섭 조선대학교 생산기술연구소 2006 生産技術硏究 Vol.28 No.2

In this study, it is developed that the system for effective prediction of residual stresses by the backpropagation algohthm using the neural network. To achieve this goal, the series experiment were carried out and measured the residual stresses using the sectional method. Using the experimental results, the optional control algorithms using a neural network should be developed in order to reduce the effect of the extemal disturbances duhng GMA welding processes. Then the results obtained from this study were compared between the measured and calculated results, weld guality might be controlled by the neural network based on backpropagation algorithm.. This system can not only help to understand the interaction between the process parameters and residual stress, but also improve the quantity control for welded structures.

분말야금용 분무철분개발

김윤채,안동홍,허재진 한국분말야금학회 1995 한국분말야금학회 학술대회논문집 Vol.1995 No.1

생산용량 제약하의 최소공급량 정책을 위한 롯사이징 모델 정의

김윤채,황학진 조선대학교 생산기술연구소 2007 生産技術硏究 Vol.29 No.2

We consider a lot-sizing model for replenishing and delivehng items under a minimum replenishment policy in which the production or replenishment capacity is limited. We formulate a mathematical model for this lot-sizing and give a general research direction for solving the model.

철압분체의 (鐵壓粉體) 활성화소결에 (活性化燒結) 대한 연구

김윤채,도변광상 (渡邊侊尙),이방식 대한금속재료학회 1985 대한금속재료학회 학술대회 개요집 Vol.1985 No.1

fe-Cu-Sn계 입분체의 소결성 향상

김윤채 한국분말야금학회 2000 한국분말재료학회지 (KPMI) Vol.7 No.1

In order to reduce the sintering temperature of iron based sintered parts, sinteing properties of iron-copper prealloyed powder were investigated at various temperatures in the range of 700∼890$^{\circ}C$, and than the rusults were compared with those of the conventional iron-copper-tin compact using elemental powders, The using of prealloyed as a new process improved its sintering performance at lower temperature than elemental powder as the conventional process. The relative sintered density and radial crushing stength of the compact using prealloyed were higher than those of using elemental powder at all sintering temperature. For example, the radial curength of the compact using powder was about 50kg/mm2 at 700$^{\circ}C$, while that of the compact using elemental powder sintered at 890$^{\circ}C$ was 43kg/mm2.

합금철 분진의 재활용을 위한 기초 연구

신강호,송영준,김윤채 三陟大學校 1998 論文集 Vol.31 No.1

This study was performed to obtain the basic data for recycling of the dust in ferroalloy manufacture. The chemical composition, composition material, particle size and shapes of the bulk dust, sizing dust and magnetic separating dust were investigated. As the result, the dust from High Carbon Ferromanganese Manufacturing Process is not sufficient as source material of Mn, the dust from Bag Filter of AOD Process is a good source material of Mn, and the dust from Cooler of AOD Process can be a good source material of Mn through Sizing or Magnetic Separation.

Fe-Cu계 합금분말을 이용한 Fe-Cu-Sn계 소결합금의 제성질

원용신,김윤채 三陟大學校 産業科學技術硏究所 2000 産業科學技術硏究論文集 Vol.5 No.-

In order to reduce the sintering temperature of iron based sintered parts, sintering properties of iron-copper-tin compact made from iron-copper prealloyed and tin powders were investigated at various temperatures in the range 700∼890 ℃, and then the results were compared with those of the conventional iron-coper-tin compact made from iron, copper and tin powders. The results obtained are as follows : 1) Sintered density ratio and radial crushing strength of iron-copper-tin compact made from iron-copper prealloyed and tin powders were higher than those of the conventional iron-copper-tin compact made from iron, copper and tin powders at all sintering tempeatures. 2) The radial crushing strength of iron-copper-tin sintered compact made from powder mixture, of which iron-7.20%copper prealloyed powder mixed with 1.80% tin powder in the copper and tin ratio 8 : 2, was obtained about 50kg/㎟ at the lowest temperature studied 700˚C for 30min, and this increased to about 60kg/㎟ after sintering at 890˚C for 30min. 3) The radial crushing strength of iron-copper-tin sintered compact made from iron, copper and tin powders mixture as the conventional method, also its chemical composition was same with in case of using above the iron-7.20%copper prealloyed powder, was obtained about 23kg/㎟ at 700˚C for 30min, and this increased to about 43kg/㎟ after sintering at 890˚C for 30min. As the result, the using of iron-copper prealloyed powder improve its sintering performance permitting lower sintering temperature more than conventional metnod.

망간 용해액의 정제를 위한 기초 연구

신강호,송영준,김윤채 三陟大學校 1998 論文集 Vol.31 No.1

This study was performed to obtain basic data for refining manganese nitrate solution which used as starting material for manufacturing Mn₃O₄, raw material of Mn-Zn soft ferrite. 1. Among the various kinds of manganese oxide, MnO is most appropriate for making manganese nitrate solution, for the MnO is easily dissolve in nitric acid and which reaction is exothermic. 2. The most appropriate condition for reduction roasting which reducing Mn₃O₄to MnO is temperature of 700~800℃, roasting time of 30~60min, carbon 5~10 wt.%. 3. The appropriate pH of solution and reaction time for removing iron and silicon from manganese nitrate solution by controlling the pH of solution are pH4~6, 1~2hour, respectively. 4. The appropriate condition for removing calcium and magnesium from manganese nitrate solution by precipitating in the form of oxalate are pH of 1~4, (NH₄)₂C₂O₄adding amount of 0.1M or less and as long reaction time as possible.

Fe-Sn系 燒結合金의 諸性質에 미치는 Sn粉의 粒度 및 配合量의 影響

홍범식,김윤채 三陟大學校 1997 論文集 Vol.30 No.1

Effects of particle size and content of tin powder on the properties of iron-tin sintered alloy for porous bearing were investigated in comparison with those of iron powder compact. The results obtained are as follows; 1) The effect of particle size of tin powder : When the particle size becomes finer, the compact shrinks a little and pore-structure becomes finer and then, the strength increases considerably. 2) The effect of tin powder content : When content of tin powder increases, the compact expands a little and also the pore-structure grows a little. But the strength decreases especially with increasing of the tin content above 1.5wt&. Therefore, it is desirable that the particle size is -350mesh and the content is about 1.0wt%.