Journal of the Korean Institute of Resources Recycling最新文献

{"title":"A Study on Improvement of Recycling Process of Waste Fluorescent Lamps","authors":"Gee Hun Lee, D. H. Lee, Y. Song, Kim Chang Kwon","doi":"10.7844/KIRR.2020.29.3.61","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.3.61","url":null,"abstract":"This study was conducted to improve the recycling process of waste fluorescent lamp, and investigate the possibility of using the waste fluorescent lamp glass as a raw material for glass beads, the leaching method of rare earth from the waste phosphor powder, and the possibility of solvent extraction of rare earth from the rare earth leaching solution. The waste phosphor contained 28.9% yttrium oxide, 3.46% cerium oxide, 1.95% europium oxide, 1.76% terbium oxide, and 1.43% lanthanum oxide. As a result of the trial production of glass beads using waste fluorescent lamp glass, it was judged that the production yield and quality were excellent, so that waste fluorescent lamp glass could be used as a raw material for glass beads. The soda roasted waste phosphor was leached in water and thereby the aqueous solution was blown with CO2 to drop the pH to about 7, Then, Al, Si and residual Na2CO3 were dissolved, and NaAlCO3(OH)2 and SiO2 were precipitated in the aqueous solution. In the 62 이기헌 · 이동훈 · 송영준 · 김창권 J. of Korean Inst. Resources Recycling Vol. 29, No. 3, 2020 1. 서 론 희토류는 Table 1에서 보듯이 원자번호가 57(Lanthanum) 부터 71(Lutetium)까지인 원소계열을 말하며, IIIA 족의 원소군(La족 15가지 원소와 및 Scandium와 Yttrium)을 포함하여 총 17종이 희토류 원소(Rare earth element)로 총칭되고 있다. 희토류는 자성재료, 전자 재료 등 첨단산업용 소재로 광범위하게 사용되고 있어 지속적으로 수요가 증가하고 있으며 그 내용을 Table 2에 나타내었다. 희토류 원소중 형광등 및 LED와 같은 조명용 광원에는 Y, La, Ce, Eu, Tb 등과 같은 물질들이 Phosphors 조성물질로 주로 사용 되고 있다. 희토류가 생산되는 지역은 매우 한정적이며 최근 들어 중국을 비롯한 희토류 생산국가에서 광물자원 을 국가발전 전략을 수립하는 중요한 요소로 사용하고 있 다. 희토류 자원은 확정매장량 기준으로 중국 36.5%, 독 립국가연합 19.3%, 미국 13.2%, 호주 5.5% 등에 주로 분 포되어 있다. 특히 경희토류인 네오디뮴(Nd)과 중 희토류인 디스프 로슘(Dy)과 터븀(Tb)은 중국에서 거의 전량이 생산되고 있다. 중국 외의 국가에도 희토류가 적지 않게 매장되어 있 음에도 불구하고 생산량을 늘리지 못하는 이유는 희토류 원광의 추출 및 분리과정에서 발생하게 되는 환경오염 때문이다. 희토류 1톤 생산 시 약 8.5kg의 불소와 13kg의 분진, 그리고 960만~1,200만 리터의 폐수를 배출한다. 또 한 분진, 폐가스, 플루오르화수소산, 이산화황, 황산, 약 75,000리터의 산성 폐수, 그리고 방사성 폐기물이 포함 되어 있다. 특히 산성 폐수에는 다량의 중금속과 미량의 희토류 금속이 존재 한다. Fluorescent lamp는 Light source인 자외선을 가시광선으로 바꾸어 주는 형광체가 유리관 내부에 도포하게 되는데, 1회에 6~7μm 씩 30μm 이 상 될 때까지 6회 이상 반복적인 도포 작업 과정을 거친 후 600°C로 가열하여 코팅하게 된다. 유리관 내부에 코 팅된 Phosphor는 host lattice와 소량의 activator로 구성 된다. 에너지를 빛의 형태로 방출하는 물질을 Phosphor라 solvent extraction of cyanex272-hydrochloric acid, cyanex272-sulfuric acid, D2EHPA-hydrochloric acid, D2EHPA-sulfuric acid, Ionquest290-hydrochloric acid, Ionquest290-sulfuric acid, p507-hydrochloric acid using xylene as a diluent, the extraction yield of Y, Eu, Ce, La, and Tb are close to 100%. However, in this conditions, the difference in extraction yield for each element, that is, selectivity is 16% or less.","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88716507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Basic Study for Manufacturing High Refractive Beads from the Waste Fluorescent Glass","authors":"Gee Hun Lee, D. H. Lee, Y. Song, Kim Chang Kwon","doi":"10.7844/KIRR.2020.29.3.51","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.3.51","url":null,"abstract":"This study was carried out to get the optimum conditions for manufacturing high refractive glass beads from waste fluorescent lamp glass. Chemical composition, X-ray diffraction pattern, particle size distribution, refractive index of glass beads, and the effect of air mixing ratio and ejection rate were investigated. The obtained results are as follows. The X-ray diffraction pattern and chemical composition of glass beads made of waste fluorescent glass are similar to common glass except ReO2 0.0108 wt%, BaO 0.071 wt%, NiO 0.0039 wt% and CaO 7.8 wt% but 11.7 wt% of common glass. The glass beads made 52 이기헌 · 이동훈 · 송영준 · 김창권 J. of Korean Inst. Resources Recycling Vol. 29, No. 3, 2020 1. 서 론 폐형광등은 자원순환정책에 따른 자원회수 품목임에도 국내에서 적정처리 되는 양은 35.7백만개 정도에 불과하며 연간 1억 개 이상의 폐형광등이 무단으로 폐기되고 있다. 서울시의 경우 주거지역 증가로 Fig. 1에서 보듯 폐형 광등의 폐기량은 매년 지속해서 증가되고 있다. 그러나 2012년도 이후 부터는 정부와 조명업계·협회·재활용 업 체간에 처리비에 따른 갈등이 발생하면서 전국적인 발생 량은 2013년 60.4톤/일, 2014년 148톤/일, 2015년 48톤/ 일, 2016년 177.5톤/일, 2017년 147.2톤/일, 2018년 89.9 톤/일 인데 비하여 폐형광등 재활용 업체의 처리실적은 2013년~2017년까지는 정확한 수량이나 물량이 확인되지 않으며 2018년 처리실적으로 148톤/년 정도만 확인되고 있다. 서울시를 대상으로 면적별·건물수 고려하여 국가 건물관리 규정에 정해진 건물면적별 조명설치 기준에 따 라 조명설치 물량을 산출할 경우 Fig. 2에서와 같이 약 8,178만개로 산출된다. 폐형광등은 유리, 알루미늄, 구리, 세라믹, 주석, 플라 스틱과 납, 수은 및 희토류로 구성된 형광체 파우더로 구 성되어 있고 처리 및 재활용을 위해서는 유해물질을 제거 하지 않으면 환경오염원이 된다. 폐형광등은 전체 조성 물의 85% 이상이 유리 성분으로 구성되어 있다. 국내에 서 사용하고 있는 폐형광등유리의 화학적 조성은 SiO2 70.2%, NaO 15.9%, CaO 5.68%, MgO 3.12%, K2O 1.12%로 나타났으며, Al2O3 2.21% 및 기타 성분들로 구 성되어 있다. 높은 에너지비용을 들여서 재활용공정으 로 정제된 유리는 현재 일반적 추세로 일반포장용, 콘크 리트용, 아스팔트용, 보도블럭용등 대부분 저가의 골재 대용으로 사용되고 있다. 폐형광등은 독일의 Herborn GmbH 기술도입을 통해 구축된 수도권, 영남권, 호남권 의 폐형광등 재활용처리 시설에서 유리와 알루미늄을 회 수하고 있다. 특히 유리는 Fig. 3과 같이 재활용공정을 거 of waste fluorescent lamp glass have the narrower particle size distribution of and the higher refractive index than the glass beads made of common glass. The optimal conditions of kiln operation for manufacturing glass beads from waste fluorescent lamp glass are 20 m/sec of ejection rate, 1.7 of air mixing ratio, and 940°C of temperature.","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"129 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91448725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chlorination Kinetics of Synthetic Rutile with Cl2+CO Gas","authors":"Sungkook Hong, So-Yeong Lee, H. Sohn","doi":"10.7844/KIRR.2020.29.3.3","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.3.3","url":null,"abstract":"The chlorination kinetics of synthetic rutile prepared by selective chlorination of ilmenite with Cl2 and CO gas mixture were studied in a fluidized bed. The effects of reaction temperature, reaction time, and the ratio of Cl2 and CO partial pressure (ClCO ) on the conversion rate of TiCl4 were investigated. The conversion rate of TiCl4 was low under the high ClCO conditions. Moreover, it was considered that the partial pressure of CO gas was more effective than that of Cl2 gas when comparing the stoichiometric conversion rate and experimental results of high CO partial pressure. Considering the porous structure of particles, the rate controlling step of the chlorination of synthetic rutile was determined to be chemical reaction and the activation energy was calculated as 53.77 kJ/mol.","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72950655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts for Waste Management According to Waste Trade","authors":"Sang-hun Lee","doi":"10.7844/KIRR.2020.29.3.43","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.3.43","url":null,"abstract":"This study reviewed the examples on analyses of the potential impacts to waste management, due to the recent trends of waste trade regulation, and summarized an analysis strategy of the impacts. As a result, a desirable analysis may begin with reasonable estimation of recent waste amounts and flows, and reasonable prediction of the future trends of waste amounts. Then, it is effective to list various key factors and derive future scenarios of the impacts, as well as employ the traditional viewpoints focusing on waste material flow or environmental regulations. The applicable analyses for each scenario can be largely divided into qualitative and quantitative methods. Due to a high uncertainty in the recent international situations with entailing possible innovative economic changes, qualitative methods may be considered in advance, and then quantitative techniques may be utilized to predict gradual changes at relieved uncertainty of the situations. Based on this review so far, proper methodology and procedures for the impact analysis were suggested on recent waste trade conditions in Korea. Given existence of the recent uncertainties such as the health and economic crises, the analysis preferably focused on deriving strategic scenarios with respect to various aspects, and suggested analysis methods applicable to each scenario.","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82027697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Gravity Separation of Speiss and Limestone Granules Using Vibrating Zirconia Ball Bed","authors":"J. Yoo, Minji Lee, Gyeong-Hwan Kim, Kyoungkeun Yoo","doi":"10.7844/KIRR.2020.29.3.36","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.3.36","url":null,"abstract":"In the present study, gravity separation of speiss (6.74 g/cm3) and limestone (2.7 g/cm3) was investigated using a vibrating 1 mm-zirconia ball (5.6 g/cm3) bed as a medium. The floating ratio and separation efficiency with increasing the number of spiess and limestone granules were examined by changing the vibration frequency from 18 Hz to 26 Hz. During the vibration, the zirconia balls circulate inside the vessel, and the spiess granules sink with the zirconia balls, but limestone granules remain on the surface of the zirconia ball bed. As the number of particles of spiess and limestone granules increased, it was observed that the granules were congested in the path of the granule sinking, so the rate of particle sinking decreased, and that limestone granules overlapping with the spiess granule also sunk. Therefore, the separation efficiency decreases with increasing the number of granules, but when the vibrational frequency increases, there is no more congestion and the separation efficiency increases. When each of the three particles was added, a separation efficiency of 100% was acheived at 22 Hz, which indicates that a dry gravity separation process that does not require a drying process is possible.","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83747014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Breakage and Liberation Characteristics of Iron Ore from Shinyemi Mine by Ball Mill","authors":"Donwoo Lee, Jihoe Kwon, Kwanho Kim, Heechan Cho","doi":"10.7844/KIRR.2020.29.3.11","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.3.11","url":null,"abstract":"This study aims to investigate breakage and liberation characteristics of iron ore from Shinyemi mine, Jeongseon by ball mill. Parameters of breakage functions for three grade samples of iron ore were obtained using single-sized-feed breakage test and back-calculation based on nonlinear programming. The results showed that with the increase in the grade of iron ore, the breakage rate factor decrease whereas the particle size sensitivity decreases. This results from retardation of microcrack-propagation by magnetite grain in the ore. Breakage distribution analysis showed that the breakage mechanism appear to be impact fracture dominant with the increase of grade owing to the stress distribution effect by magnetite grain. Degree 12 이돈우 · 권지회 · 김관호 · 조희찬 J. of Korean Inst. Resources Recycling Vol. 29, No. 3, 2020 1. 서 론 광업 분야에서 선광 공정은 분쇄 공정과 이후의 분리 공정으로 이루어진다. 선광 공정에서 가장 선행되는 분쇄 공정은 입도의 감소를 통하여 광석 내 목적광물을 맥석과 입자 단에서 분리시키는 것을 목적으로 실시한다. 이러한 분쇄 공정은 높은 에너지를 소비하는 공정으로 대부분의 선광 공정에서 총 에너지 비용의 약 50% 이상을 차지한다. 또한, 에너지 효율이 낮기 때문에 투입 에너지의 10-20% 만이 실제 입도 감소에 사용된다. 이때 소비되는 에너지 의 양은 입도 영역에 따라 차이가 존재하며, 입도 영역이 작아질수록 소비되는 에너지의 양이 기하급수적으로 증 가한다. 뿐만 아니라 분쇄 공정에서의 단체분리 달성도가 전체 공정의 효율에 영향을 끼친다는 점에 있어서도 분쇄 공정은 중요한 의미를 갖는다. 그러므로 효율적인 분쇄 공정의 설계는 에너지 절약 및 이후 공정의 효율적인 수행 측면에서 필수적이나 국내 대부분의 현장에서 분쇄 공정 은 장비의 매뉴얼이나 경험에 의존하기 때문에 비효율적 인 공정을 운영하고 있다. 따라서 분쇄 대상 광석의 분쇄 및 단체분리 특성에 대한 이해를 바탕으로 효과적인 장비 운용이 가능하도록 할 필요가 있으며, 이를 위해 수학적 모델에 기초하여 분쇄 공정을 해석하는 방법을 적용할 수 있다. 수학적인 분쇄모델은 과거로부터 많은 연구가 진행되 어 왔다. 고전적인 분쇄모델로는 Kick, Rittinger, Bond의 법칙이 있는데, 이들은 볼밀의 회분식 분쇄실험의 결과 를 바탕으로 한 경험적 모델로서, 에너지와 분쇄 전과 후 입도의 관계식 형태로 나타난다. 일반적으로 큰 입도에서 는 Kick의 법칙이, 작은 입도에서는 Rittinger의 법칙이 잘 일치한다고 알려져 있다. 이러한 고전적인 분쇄모델의 한계를 보완하는 모델이 1960년대에 등장한 물질수지방 정식(population balance equation, PBE)에 기초한 모델 로 분쇄율과 분쇄분포를 이용하여 분쇄 공정을 설명하였 으며, Austin, Luckie, Reid에 의해 연구가 수행되었다. 이 모델을 이용하면 투입한 시료에 대하여 임의의 분쇄시 간에 따른 분쇄 후의 입도 분포의 예측이 가능하다. 분쇄 공정 이후의 분리 공정의 효율에는 분쇄 후의 입 도 분포뿐만 아니라 단체분리도 역시 매우 중요한 지표로 작용한다. 단체분리도는 전체 유용 광물 중 맥석과 결합 되지 않고 단일 광물 입자 형태로 존재하는 비율로 정의할 수 있으며, 현미경을 통한 화상 분석을 이용하여 측정할 수 있다. 과거에는 단체분리도 측정을 위한 광물의 경계 면 구분 방법으로 화학적 부식을 이용하는 접근법들이 주 로 사용되었으나, 최근에는 광물의 색과 빛에 의한 반사율 을 통해 경계를 구분하는 방법이 주로 사용되며, 광학 현 미경 대신 주사전자현미경(scanning electron microscope, SEM)을 이용하여 분석이 이루어진다. 전자현미경의 후 방산란전자(black scattered electron, BSE)에서 획득한 이미지의 경우 원자 크기에 따라 충돌 확률 차이에 기인한 명암 차이가 발생하기 때문에 이를 이용하여 분석이 가능 하다. 이때 명암 정도가 비슷하여 구별이 어려울 경우 X 선 회절 분석(X-ray diffraction, XRD)이 보완적으로 활 용될 수 있다. 최근 분석 장비의 발달로 주사전자현미경 의 BSE이미지와 이미지 상 입자들의 X선 정보를 함께 활 용하여 목적광물의 품위 분포 측정이 가능하게 되었다. 본 연구는 신예미 광산의 철광석을 대상으로 수행되었 다. 신예미 광산은 태백산 광화대 서부에 위치하며, 2019 년 10월 현재 연간 1백만 톤의 자철광석을 생산하고 있다. Fe 기준 품위 36%의 원광으로부터 선별 과정을 거쳐 약 42% 품위의 건식 정광을 생산하며, 이 과정에서 발생되 는 22% 품위의 중광은 2차 선별 공정의 대상이 된다. 2차 선별 공정은 볼밀에 의한 분쇄, 습식 자력 선별로 구성되 어 있으며 2차 정광의 평균 품위는 약 55%이다. 중광에 대한 2차 선별 공정은 분쇄 공정 비용으로 인해 철광석의 가격에 따라 가동 유무를 결정하고 있는데 공정 비용 중 볼밀에 의한 분쇄 공정이 약 80% 이상을 차지하는 것으 로 추산된다. 철 함량 기준 원광의 20%를 차지하는 중광 의 경제성을 확보하기 위해서는 효율적인 분쇄 공정 설계 of liberation (DOL) increased with the increase in grade and","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88353387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Separation of Valuable Metal from Waste Photovoltaic Ribbon through Extraction and Precipitation#","authors":"Wei Sheng Chen, Yen-Jung Chen, K. Yueh","doi":"10.7844/KIRR.2020.29.2.69","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.2.69","url":null,"abstract":"With rapid increasing production and installation, recycling of photovoltaic modules has become the main issue. According to the research, the accumulation of waste modules will reach to 8600 tons in 2030. Moreover, Crystalline-silicon (c-Si) Photovoltaic modules account for more than 90% of the waste. C-Si PV modules contain 1.3% of weight of photovoltaic ribbon inside which contains the most of lead, tin and copper in the PV modules, which would cause environmental and humility problem. This study provided a valuable metal separation process for PV ribbons. Ribbons content 82.1% of Cu, 8.9% of Sn, 5.2% of Pb, and 3.1% of Ag. All of them were leached by 3M of hydrochloric acid in the optimal condition. Ag was halogenated to AgCl and precipitated. Cu ion was extracted and separated from Pb and Sn by Lix984N then stripped by 3M H2SO4. The effect of the optimal parameters of extraction was also studied in this essay. The maximum extraction efficiency of Cu ion was 99.64%. The separation condition of Pb and Sn were obtained by adjusting the pH value to 4 thought ammonia to precipitate and separate Pb and Sn. The recovery of Pb and Sn can reach 99%.","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"109 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74000562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comminution Characteristics for Recycling Waste Glass Bottle","authors":"Hansol Lee, Hoon-Ha Lee","doi":"10.7844/KIRR.2020.29.2.28","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.2.28","url":null,"abstract":"To enhance the recycling rate of wasted glass bottles toward recycled aggregates, the study would decide optimal comminution equipment based on the particle size distribution, aspect ratio and equipment energy analysis. The impact, compress and abrasion is type of generated force by comminution. So, hammer crusher, shredder, roll crusher and ball mill have been selected because they have characteristic which is each type of force. As a result of the particle size analysis of each product, only the shredder product satisfied concrete and asphalt aggregate quality standard condition. Also, as a result of aspect ratio analysis using Imaging software program (Image J, National institute of health), most of size fraction is confirmed under 1.6 value. It was confirmed that the product has low dangerousness and satisfying to shpage index. Also, the particle reduction ratio against input energy of shredder product was the most high. Therefore, we can decide that the optimal equipment which applicable for comminuting waste glass bottle in certain particle size under 10mm is shredder. The result of study will make contribution to increasing energy efficiency of comminution processing and competitiveness of product.","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"56 8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80111958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis for Water Vapour Adsorption and Desorption Performance of Waste Paper-Mulberry according to Particle Size Control","authors":"K. Jo, Tae-yeon Kim, S. Seo, Oh-Kyu Lee, Yong-sik Chu","doi":"10.7844/KIRR.2020.29.2.8","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.2.8","url":null,"abstract":"In this study, adsorption and desorption characteristics of pulverized waste paper-mulberry pellet and bast fiber were measured to confirm the applicability to humidity control products. Paper-mulberry powder was classified by 710-355μm, 355-100μm, 100-45μm and less than 45μm and used in experiment. Specific surface area increased from 1.02m2/g to 1.35m2/g as the particle size decreased from 710μm to under 45μm. Adsorption and desorption performance decreased in the order of 355-100 μm, 710-355μm, 100-45μm, less than 45μm and bast fiber, adsorption content on each particle sizes were 141.1g/m2, 147.1g/m2, 135.7g/m2, 129.0g/m2 and desorption content were 117.2g/m2, 123.6g/m2, 110.2g/m2, 93.3g/m2. As a result, adsorption and desorption performance of paper-mulberry powder were superior to those of the bast fiber and these phenomenon can be considered that it caused by pore distribution in pellet and damage of fiber.","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"122 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88123372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recovery of the Vanadium and Tungsten from Spent SCR Catalyst Leach Solutions by Hydrometallurgical Methods#","authors":"In-hyeok Choi, Gyeonghye Moon, J. Jeon, Jin-Young Lee, K. Rajesh","doi":"10.7844/KIRR.2020.29.2.62","DOIUrl":"https://doi.org/10.7844/KIRR.2020.29.2.62","url":null,"abstract":"In new millennium, wide-reaching demands for selective catalytic reduction (SCR) catalyst have been increased gradually in new millennium. SCR catalyst can prevent the NOx emission to protect the environment. In SCR catalyst the main composition of the catalyst is typically TiO2 (70~80%), WO3 (7~10%), V2O5 (~1%) and others. When the SCR catalysts are used up and disposed to landfills, it is problematic that those should exist in the landfill site permanently due to their extremely low degradability. A new advanced technology needs to be developed primarily to protect environment and then recover the valuable metals. Hydrometallurgical techniques such as leaching and liquid-liquid extraction was designed and developed for SCR 폐촉매 침출액으로부터 습식제련법에 의한 바나듐, 텅스텐의 회수 63 자원리싸이클링 제 29권 제 2호, 2020","PeriodicalId":17385,"journal":{"name":"Journal of the Korean Institute of Resources Recycling","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82161440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}