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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Institute of Resources Recycling
Journal Basic Information
Journal DOI :
The Korean Institute of Resources Recycling
Editor in Chief :
Volume & Issues
Volume 21, Issue 6 - Dec 2012
Volume 21, Issue 5 - Oct 2012
Volume 21, Issue 4 - Aug 2012
Volume 21, Issue 3 - Jun 2012
Volume 21, Issue 2 - Apr 2012
Volume 21, Issue 1 - Feb 2012
Selecting the target year
Technological Modules for the Recycling of Urban Mines and Non-Ferrous Smelting Processes in Korea
Oh, Jae-Hyun ; Kim, Joon-Soo ; Moon, Suk-Min ; Min, Ji-Won ;
Journal of the Korean Institute of Resources Recycling, volume 21, issue 1, 2012, Pages 3~16
DOI : 10.7844/kirr.2012.21.1.003
In order to review the technological modulus of the recycling of urban mine resources and non-ferrous smelting process in Korea, key point of recycling process, physical separation, non-ferrous smelting process, unit operation for the recycling technology, recycling process of LS-Nikko Copper and Korea Zinc were studied. Finally, metal recycling processes of the typical non-ferrous smelters in Japan such sa DOWA Holdings and JX Holdings were compared with those of LS-Nikko Copper and Korea Zinc.
Reclaimed Products to Recycling and Energy Recovery for Sustainable Use of Closed Non Sanitary Landfills through Reclamation Works
Lee, Byung-Sun ; Na, Kyung-Duk ; Han, Sang-Kuk ; Phae, Chae-Gun ; Oh, Sae-Eun ;
Journal of the Korean Institute of Resources Recycling, volume 21, issue 1, 2012, Pages 17~29
DOI : 10.7844/kirr.2012.21.1.017
potential assessment of converting closed non sanitary landfills into sustainable landfill through the reclamation works(= landfill mining project) of illegal landfill discovered in land development site using Sustainable Landfill Reclamation system(SLR-system) was investigated. The SLR system had treatment capacity of 91.4
(130.61 ton/hr) in condition of 28.0% of water content. Recovery ratio and purity of sorted soil were 98.9% and 99.66%, respectively. Sorted combustibles were 91.8% and 92.0%, respectively. Especially, high heating value (HHV) and low heating value(LHV) of combustibles were 4,282kcal/kg and 3,636 kcal/kg, respectively, in considering the energy content and recovery ratio of combustibles. Therefore, combustibles separated from landfill site have higher value than Fluff RDF standard value(3,500kcal/kg) of MOE. RDF can be produced with combustibles by 84.43%. Averaged size and organic foreign matter content of the sorted soil were less than 035mm and 0.31 %(VN), respectively. In addition, concentration of all contents of hazardous matters containing soils met safety standards. Therefore, it is possible to be recycled as refilling and cover materials to rebuild Sustainable landfills by 98.42%.
Study of Polymer Rapid Setting Cement Concrete Using Electric Arc Furnace Oxidizing Slag Aggregate
Jung, Won-Kyong ; Gill, Yong-Soo ; Kang, Seung-Hee ;
Journal of the Korean Institute of Resources Recycling, volume 21, issue 1, 2012, Pages 30~40
DOI : 10.7844/kirr.2012.21.1.030
Electric arc furnace slag is made in ironworks during steel refining, it is been increasing chemical and physical resistibility using ageing method of unstable state of melting steel slag for using concrete's fine aggregates. Which is been changing stable molecular structure of aggregates, it restrains moving of ion and molecule. In Korea, KS F 4571 has been prepared for using the electric arc furnace oxidizing slag to concrete aggregates(EFS). In this study, Electric arc furnace oxidizing slag is used in the PRCC(Polymer Rapid setting Cement Concrete) which is applied a bridge pavement of rehabilitation, largely. The results showed that the increment of compressive strength development by 10- 20%. The flexural strength of EFS-Con increased greatly as the electric arc furnace oxidizing slag changed. The compressive strength and flexural strength developed enough for opening the overlayed EFS-Con to the traffic after 4 hours of EFS-Con placement. The permeability of EFS-Con was evaluated as negligible due to its very low charge passed. Thus, EFS-Con could be used at repairing or overlaying the concrete at fast-track job sites.
A Study on the Behavior of Boron Extraction from Brine by Diol-type Extractant
Yoon, Mi-Hee ; Kang, Dong-Jun ; An, Jeon-Woong ; Min, Dong-Joon ;
Journal of the Korean Institute of Resources Recycling, volume 21, issue 1, 2012, Pages 41~48
DOI : 10.7844/kirr.2012.21.1.041
A study on the behavior of boron extraction by TMPD(2,2,4-trimethyl-1,3-pentanediol) was carried out to find the optimum conditions for the boron extraction from brine. In case of boron extraction from 0.736 g/L boron-containing brine, typical optimum extractive conditions would be confirmed to be 0.75 mol/L of extractant concentration at 3.0 pH of brine with 1 of phase ratio and 20 min. of shaking time at 298 K respectively. And 1 mol/L sodium hydroxide of stripping agent was shown above 99 % of boron extraction and stripping efficiencies. Also, extraction equilibrium equation were obtained through experiments as follows : log D = 1.7 log
+ constant at pH < 6.
Feasibility Analysis on Slag Reprocessing Project in Lubumbashi, Democratic Republic of the Congo
Kim, Yu-Jeong ; Kim, Dae-Hyoung ;
Journal of the Korean Institute of Resources Recycling, volume 21, issue 1, 2012, Pages 49~59
DOI : 10.7844/kirr.2012.21.1.049
One of the world's top resource-rich countries, the Democratic Republic of the Congo has ample reserves of cobalt, iron ore, copper and diamond in particular. Importing most of major mineral resources, the Republic of Korea has examined-together with the Congo government since 2008-the possibility of a project where it supports port construction in the Democratic Republic of the Congo and acquires useful minerals such as zinc, cobalt and copper in exchange through slag reprocessing in the local city of Lubumbashi. This study conducted feasibility analysis on the slag reprocessing project in Lubumbashi, Congo and found that the project's payback period stands at 6.7 years, net present value(NPV) at 34 million dollars and internal rate of return(IRR) at 17.4%. According to sensitivity analysis that takes into account uncertainties concerning taxation, fixed cost, operational cost and resource prices, the NPV of the project ranges from -24.8 million dollars to 92.7 million dollars.
Preparation and oxygen control of Ti-6Al-4V alloys by recycling dental pure Ti scraps
Oh, Jung-Min ; Lee, Back-Kyu ; Choi, Good-Sun ; Lim, Jae-Won ;
Journal of the Korean Institute of Resources Recycling, volume 21, issue 1, 2012, Pages 60~65
DOI : 10.7844/kirr.2012.21.1.060
The Ti-6Al-4V alloys were prepared by recycling of dental Ti pure scraps using vacuum arc melting process, and their physical properties were evaluated the Ti-6Al-4V alloys with different oxygen concentrations. For the preparation of Ti-6Al-4V alloys, Ti pure scraps used for dental implant were utilized as a raw material, and their different oxygen concentrations were ranged from G1 to G4 grade in ASTM standards. It was confirmed that the weight loss of Al in the composition of Ti-6Al-4V alloy could be controlled under the Ar pressure of 875 torr during the melting of alloy. The oxygen concentrations of the Ti-6Al-4V alloys were ranged from 1170 to 3340 ppm. The vickers hardness change of the Ti-6Al-4V alloys showed a similar behavior with that of pure Ti. As a result, we confirmed a possibility of preparation of Ti-6Al-4V alloy by recycling of dental Ti scraps using vacuum arc melting process in this study.
Study on Thermodynamic Properties of Sulfidization for Uranium and Rare Earth Oxides
Lee, Jung-Won ; Lee, Jae-Won ; Kang, Kweon-Ho ; Park, Geun-Il ;
Journal of the Korean Institute of Resources Recycling, volume 21, issue 1, 2012, Pages 66~74
DOI : 10.7844/kirr.2012.21.1.066
In order to evaluate the feasibility of selective sulfidization of uranium and rare-earth(RE) oxides, an analysis on thermodynamic data, such as
phase stability diagram and changes of Gibbs free energy for sulfidization of uranium and rare-earth oxides were carried out. Comparing
phase stability diagram at wide range of sulfur potential,
remains unreacted, while RE oxides are sulfidized. The Gibbs free energy change(
) of sulfidization of RE oxides is lower than that of uranium oxides. Thus, the selective formation of RE sulfides is possible during sulfidization of RE and uranium oxides at lower temperature.
was selected as a sulfidizing agent, because it is a stronger sulfidizing agent than other agents and reacts at lower temperature.
A study of Immobilizing Heavy metals by pellets manufactured from Coal tailings and Iron oxide
Lee, Gye-Seung ; Song, Young-Jun ;
Journal of the Korean Institute of Resources Recycling, volume 21, issue 1, 2012, Pages 75~81
DOI : 10.7844/kirr.2012.21.1.075
Porous pellets for immobilizing heavy metals were manufactured from coal tailings and iron oxide powder. Coal tailings was pulverized and mixed with iron oxide powder. The mixed powder was granulated into spherical pellets and roasted. Over
, residual coal in coal tailings reduced iron oxide to ZVI(Zero-Valent Iron). The pellets have 34.63% of porosity, 1.31 g/mL of bulk density, and 9.82.urn median pore diameter. The pellets were reacted with synthetic solutions containing each heavy metals: arsenic(V), copper(II), chrome(VI), and cadmium(II), respectively. On the test of immobilizing heavy metal, the pellets made at
were superior to the other pellets made under
. Immobilizing over 99.9% of 10ppm heavy metal solutions required I hour for arsenic, 2 hours for chrome, and 4 hours for copper. However, immobilizing capacity of cadmium was inferior to that of the other metals and it was decreased in reversely proportion to initial concentration of the solutions.
Trend on the Recycling Technologies for the used Tungsten Carbide(WC) by the Patent and Paper Analysis
Jeong, Jin-Ki ; Lee, Jae-Chun ; Park, Sang-Woo ; Kang, Kyung-Seok ;
Journal of the Korean Institute of Resources Recycling, volume 21, issue 1, 2012, Pages 82~92
DOI : 10.7844/kirr.2012.21.1.082
There are several kinds of tungsten carbide(WC) such as light bulbs, metal cutting tools, drill bits, mining tools, military ordinance, high speed tool steels, chemicals/catalysts, wear resistance parts, jet engine turbine blades, etc.. These days it has been widely studied for the recycling technologies of the used tungsten carbide(WC) from view points of economy and efficiency. In this paper, open/registered patents of US, JP, EP, and KR and SCI Journal related to recycling technologies of the used Tungsten Carbide(WC) between 1969-2011 were reviewed. Patents and papers were collected using key-words searching and filtered by filtering criteria. The trends of the patents and papers was analyzed by the years, countries, companies, and technologies.