유리폐기물과 하수슬러지 소각재의 고형화 처리연구

한상목,신대용,윤봉구,김승겸 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

하수슬러지 소각재, 폐유리분말 및 고로슬래그의 고형화에 의하여 건자재를 제조하였다. 하수슬러지 소각재는 SiO_2와 Al_2O_3가 75 wt%, Fe_2O_3가 8.21 wt%, 폐유리분말은 SiO_2 71.4 wt%, Na_2O 14.43 wt% 및 CaO 9.32 wt%, 고로슬래그는 SiO_2 33.4 wt%, CaO 41 wt% 및 Al_2O_3 14.5 wt%를 함유하여 세라믹스 제조원료로 사용이 가능하였다. 하수슬러지를 800℃에서 2시간 하소한 무기질분말을 분쇄하여 하수슬러지 소각재를 제조하였다. 30∼70 wt%의 하수슬러지 소각재, 30∼70 wt%의 폐유리분말 및 10∼30 wt%의 고로슬래그를 혼함하여 950∼1,100℃에서 2시간 소성하여 시편을 제조하였다. 하수슬러지 소각재 첨가량이 감소하고 폐유리분말의 첨가량과 소성온도가 증가하면 부피비중과 압축강도는 증가하였으나 기공률과 흡수율은 감소하였다. 1,050℃에서 소성한 시편(No. 1, 3, 5 및 7)의 부피비중은 1.70∼1.83, 기공률과 흡수율은 0.3∼2.4% 및 0.1∼1.5%, 압축강도 272∼323 kgf/㎠을 나타내었다. 고로슬래그를 첨가하여 1,100℃로 소성한 시편(No. 8, 9, 및 10)의 부피비중은 1.82∼2.11 및 압축강도는 350∼671 kgf/㎠이었다. 하수슬러지 소각재, 고로슬래그 및 시편의 중금속출량은 매립지 침출수배출 허용기준치보다 낮아, 본 연구에서 제조한 시편은 주변 환경에 해가 없어 건자재로의 이용이 가능하였다. An experimental study for the constructional material by solidification using sewage sludge ash, waste glass powder and blast furnace slag was carried out in the senses of waste materials disposal and utilization. The reusability of sewage sludge ash, waste glass powder and blast furnace slag as a raw material in the manufacturing process of ceramics was highly expected because the chemical compositions of these waste materials were mostly SiO_2 and Al_2O_3. Sewage sludge ash was fabricated by calcined at 800℃ for 2 hours and obtained by the crushing. The mixture of 30∼70wt% of sewage sludge ash, 30∼70 wt% of waste glass powder and 10∼30 wt% of blast furnace slag were heated at 950∼1,100℃ for 2 hours. The density and the compressive strength of specimen increased with increasing the sintering temperature and decreasing the addition amount of sewage sludge ash, No. 1, 3, 5 and 7 specimens showed the bulk density of 1.70∼1.83, porosity of 0.3∼2.4%, water absorption of 0.1∼1.5% and compressive strength of 272∼323kgf/㎠. And, that of the No. 7 specimen heated at 1,100℃ increased with increasing the addition amount of blast furnace slag, and for No. 8, 9 and 10 specimens, bulk density was 1.82∼2.11 and compressive strength was 350∼671 kgf/㎠. An extraction test for specimen to detect toxic materials showed below the permitted standard of land-filling extractable heavy metal contents. It was founded that the specimen were useful for the constructional materials.

재생 Al₂O₃분말을 이용한 Al₂O₃세라믹스의 소결 특성 연구

한상목,신대용 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-

Al2O3 세라믹스의 재활용을 위한 소결거동을 조사하기 위하여 재생 Al2O3 분말의 첨가량, 입자크기 및 소결온도에 따른 시편의 물리ㆍ기계적 특성을 측정하였다. 1,650℃에서 소결한 순수 Al2O3 시편을 급랭에 의하여 500㎛ 정도의 입자로 파쇄한 후, 자동유발을 이용하여 40㎛ 전ㆍ후로 분쇄하였다. 분쇄한 Al2O3 분말과 순수한 Al2O3 분말을 적정비로 혼합 후, 재소결에 의하여 제조한 Al2O3 세라믹스의 재생 Al2O3 분말의 첨가량, 입자 크기 및 소결온도에 따른 시편의 밀도 흡수율, 기공률, 3점곡강도 및 SEM 분석을 행하였다. 재생 Al2O3 분말의 첨가량이 증가함에 따라 시편 내에 존재한 기공에 의하여 밀도와 3점곡강도는 감소하였으나, 1,650℃에서 소결한 시편의 3점곡강도는 200 MPa 이상으로 구조용재료로 사용이 가능하였다. 또한, 재생 Al2O3 세라믹스 100wt%의 유리분말을 첨가하요 1,650℃에서 소결한 시편은 첨가한 유리분말의 고온용융에 의하여 생성한 액상에 의하여 물리ㆍ기계적 성질은 감소하였다. The sintering behavior of the Al2O3 composites for recycling Al2O3 powder was investigated as a function of the recycling Al2O3 powder and particle size with respect to physical and mechanical properties. Pure Al2O3 specimen was fabricated by sintering and was crushed into powder under 40㎛ in particle size by thermal shock treatment and automatic mortar crushing. Then, the crushed Al2O3 powder was mixed with pure Al2O3 powder, and the mixture was subjected to re-sintering to reuse Al2O3 composites. The reclaimed Al2O3 specimen were investigated by 3-point bending strength and SEM observation of microstructure. Density and 3-point bending strength of the reclaimed Al2O3 composites decreased as the addition amounts of recycled Al2O3 powder increased. The average 3-point bending strength of specimens heated at 1,650℃ were over 200 MPa. SEM observation indicated that pore distribution was inhomogeneous and pores were still resided in specimen, Pores, consequently, formed cracks which markedly decreased bending strength. Futhermore, 10wt% glass containing reused Al2O3 specimens were decreased physical and mechanical properties, so called over-sintering behavior.

고속 신호 획득을 위한 SoC GPS수신기의 설계 및 구현

한상목,박찬식 충북대학교 컴퓨터정보통신 연구소 2004 컴퓨터정보통신연구 Vol.12 No.2

본 연구에서는 SOC을 목표로 GPS 수신기를 설계 및 구현 하였다. 5채널 GPS 수신기를 Altera사의 10만 게이트 Excalibur를 이용하여 구현할 수 있었다. 여기에 초기 신호 획득 시간을 줄이기 위해 다중 상관 방식을 추가하였다. 질제 측정치를 이용하여 실험한 결과는 이중 장관기일 경우 40% 그리고 사중 상관기일 경우 60% 이상 성능 향상됨을 보여주었다. 본연구의 결과는 차세대 GPS 수신기와 갈리레오 수신기설계 및 제작에 쉽게 적용할 수 있을 것이다. A design and implementation of SoC based GPS receiver is given in this paper. A 5 channels GPS receiver is implemented using Alteta's Excalibur with 100 thousand gates. A multiple correlation method is added to SoC based GPS receiver to reduce signal acquisition time. Experimental results show that improvement of more than 40% and 60% can be made by using dual-correlator and quad respectively. It is expected that these results can be easily applied into the design and implementation of GPS/Galileo receivers.

소결체 미구조의 현미경적 고찰 : 카오린-도석 계 Kaolin-Pottery stone system

한상목 江原大學校 産業技術硏究所 1985 産業技術硏究 Vol.5 No.-

The microstructure of sintered body of two component(kaolin-pottery stone) system after firing was examined with scanning electron microscope. At first the pottery stone ws melted into glassy phase and the kaoline was decomposed to mullite and silica at higher temperature. The interlocked mullite crystals and silica surrounded by glassy phase are belived to increase strength.

Electro-osmosis에 의한 Dehydration

한상목 강원대학교 산업기술연구소 1984 産業技術硏究 Vol.4 No.-

In process of water removing safely from plastic clay, an electric field applied to a wet, porous solid such as clay usually causes the rapid dehydaration. The water-bearing positive ions move to negative electrode under the d.c. electrical stress or field. Therefore application of electro-osmosis to wet clay could include drying thick and large-scale ceramic body quickly and evenly. The d.c. power supply unit to 60 volts is necessary for safe practice. Also wider contact area and shorter distance between electrodes accelerate effectively the removal of water.

요산樂山 한신계곡

한상목 대한사립학교장회(구 대한사립중고등학교장회) 2020 私學 Vol.159 No.-

도자기용 단가마에서 CO₂분석기를 사용한 효율적 소성방법 연구 I. 도자기 유약개발에 관한 연구

한상목,Han, Sang-Mok 강원대학교 산업기술연구소 1983 産業技術硏究 Vol.3 No.-

There are chief concerns every ceramist must keep in mind when firing a single kiln : Being able to read and control the kilns temperature as the firing progresses and as the kiln cools after firing. Controlling the atmosphere of the kiln in order to create desired glaze and clay body effects. Getting the most efficient use from the fuel-the most heat possible from the least fuel possible. The more exactly, author can control these factors with some result.

A Study on the Mud Flow Characteristics in Directional Drilling System

한상목,우남섭,김영주 한국에너지학회 2018 한국에너지공학회 학술발표회 Vol.2018 No.04

초보자를 위한 해설 -유리와 유약

한상목 이화여자대학교 도예연구소 1981 陶藝硏究 Vol.- No.3

Solid-liquid mixture flow through a slim hole annulus with rotating inner cylinder

한상목,우남섭,황영규 대한기계학회 2009 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.23 No.2

An experimental study was conducted to study solid-liquid mixture upward hydraulic transport of solid particles in vertical and inclined annuli with rotating inner cylinder. Lift forces acting on a fluidized particle play a central role in many important applications, such as the removal of drill cuttings in horizontal drill holes, sand transport in fractured reservoirs and sediment transport, etc. Annular fluid velocities varied from 0.4 m/s to 1.2 m/s. Effect of annulus inclination and drill pipe rotation on the carrying capacity of drilling fluid, particle rising velocity, and pressure drop in the slim hole annulus have been measured for fully developed flows of water and of aqueous solutions of sodium carboxymethyl cellulose (CMC) and bentonite, respectively. For higher particle feed concentration, the hydraulic pressure drop of mixture flow increases due to the friction between the wall and solids or among solids.