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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 10, Issue 6 - Dec 2001
Volume 10, Issue 5 - Oct 2001
Volume 10, Issue 4 - Aug 2001
Volume 10, Issue 3 - Jun 2001
Volume 10, Issue 2 - Apr 2001
Volume 10, Issue 1 - Feb 2001
Selecting the target year
Current Status and Future Prospects for The Car Recycling System in Korea
Journal of the Korean Institute of Resources Recycling, volume 10, issue 3, 2001, Pages 3~13
The Korean Auto industry has developed remarkably over the past 30 years. In 2000 alone, Korea produced 3.11 million vehicles, and the number of vehicles registered surpassed the ten million mark. As the number of vehicles registered in Korea has increased, yew after you, a rising number of cars have been scrapped. In 2000, a total of 455,592 automobiles were scrapped, up dramatically from only 101,158 in 1989. The system for handling of ELV(End-of-Life Vehicles) in Korea is governed by the "Motor Vehicle Control Act". The Act places the responsibility for vehicle scrapping directly on the vehicle owners. h vehicle owner can only can eel a vehicle registration after he gets a certificate from an authorized vehicle dismantler showing that his vehicle was properly scrapped according to the law. The take-back rate of ELV reaches nearly 100% in Korea. The vehicle scrapping process in Korea is very similar to those in other countries. fluids such as fuels and oils are first removed, and recyclable parts are collected and separated. Engines and transmissions are dismantled and recycled for use as raw material. Plastics, which are not easily reused, are generally treated as industrial wastes. The "Motor Vehicle Control Act" prohibits reuse of certain parts in order to guarantee the safety of the used auto parts. However, some restrictions on the reuse of auto parts have recently been eased to promote recycling. In this paper, additionally, car recycling policy of the foreign countries such as Japan, Germany and EU were reviewed.
Separation of Unburned Carbon from Coal Fly Ash Using and Electrocyclone
Journal of the Korean Institute of Resources Recycling, volume 10, issue 3, 2001, Pages 14~22
For the recycle of coal fly ash generated from power stations, we developed an electrocyclone system which can separate unburned carbon form coal fly ash, based on the fact that coarse fly ash particles contain higher amount of unburned carbon and unburned carbon particles are charged positively, and pure ash particles are charged negatively on contacting each other. Additionally, guide vanes were installed in the cyclone to control the cut size. Two types of electrode, stick and grid type, were designed to investigate the effect of electrode type. Results show that by introducing an electric field inside the cyclone, the yield increases by 5 to 15e1o. But the content of unburned carbon in the clean ash does not change significantly.
A Study on the Recovery of Zinc ion from Metal-Plating Wastewater by Using Spent Catalyst
Journal of the Korean Institute of Resources Recycling, volume 10, issue 3, 2001, Pages 23~28
Zinc ion could be recovered from metal plating wastewater with the spent iron oxide catalyst which was used in the plant of Styrene Monomer(SM) production. The zinc was recovered more than 98.7fo at higher than pH 2.0. The saturation mag-netization of the spent catalyst is enough high as 59.4 emu/g to apply in the solid-liquid separation after treating the wastewater. The mechanism of zinc recovery with the iron oxide catalyst could be a electro-chemical adsorption at pH 3.O~8.5, and a precipitation as Zn(OH)2 at higher than pH 8.5. Spent catalyst, Iron oxide, Zinc recovery, Metal-plating wastewater
Basic Studies on the Recovery of Zinc Metal from Wastewater by Cyclic Voltammetry
Journal of the Korean Institute of Resources Recycling, volume 10, issue 3, 2001, Pages 29~36
Cyclic voltammetry has been applied in the basic studies for the treatment and recovery of heavy metal component contained in wastewater by electrochemical reduction. The electrochemical behaviors of zinc ion for zinc metal electrode and carbon elec-trode were characterized by voltammograms and it was showed that zinc ions were reduced to metallic form below -0.76 V vs SHE. The change in the features of crystalline form of metallic zinc upon oxidation and reduction reaction was observed by X-ray diffraction method and the Am analysis verified that zinc ions were reduced to metal on copper plate. The results of this study were regarded to be important and meaningful in the treatment of heavy metal containing wastewater and, as a result, in the obtainment of metallic product by electrochemical method.
Development of Iron and Steelmaking Processes by Slag Engineering Technology
Journal of the Korean Institute of Resources Recycling, volume 10, issue 3, 2001, Pages 37~42
Current iron and steelmaking operation was re-evaluated on the basis of slag engineering technology to optimize slag operations. In blast furnace process, increase in the basicity of slags (C/S) could obtain progressed fluidity and hot metal quality. COREX process would be stabilized in view of slag fluidity and hot metal quality by reducing input content of
In STS-AOD process, addition of small amount of lime could improve refining capacity of the slag; also calcium aluminate flux could be taken into account as a potential substitute for fluorspar, without degradation of operation efficiency and steel quality.
Physical Treatment for Reclaiming Spent Carbon-Zinc and Alkaline
Journal of the Korean Institute of Resources Recycling, volume 10, issue 3, 2001, Pages 43~50
Characteristics of crushing and magnetic separation on the spent batteries, were investigated for reclaiming spent carbon-zinc and alkaline manganese dioxide batteries. Crushing of carbon zinc battery was easier than that of alkaline
battery using impact type crusher with rotary blades. Most of magnetic products were distributed in the range of 8 mesh size. With crushing 1 ton of spent carbon-zinc and alkaline
batteries respectively, magnetic separation of 8 mesh oversize particles, we can get 214 kg and 235 kg of magnetic products which is composed of 94% and 88% of Fe.
Removal of Impurities from Waste Carbon Sludge for the Recycling
Journal of the Korean Institute of Resources Recycling, volume 10, issue 3, 2001, Pages 51~59
Impurities removal from waste carbon black was carried out to produce high-grade carbon black. A large amount of hydrophilic carbon black is produced as a byproduct of the hydrogen production process by flame decomposition of water. Due to its impurities content such as sulphur, iron, ash, etc., it can only be used as low-grade carbon or burnt out. High-grade hydrophilic carbon black is 3~5 times more expensive than oil-based carbon black because of high production cost associated with process complexly and pollutant treatment. Hydrophilic carbon is normally used for conductive materials for batteries, pigment for plastics, electric wire covering, additives for rubber, etc. In these applications, impurity content must be blow 1 fe. In this study, magnetic separation, froth flotation and ultrasonic treatment were employed to remove impurities from the low-grade hydrophilic carbon black. Results showed that the ash, iron and sulphur content of product decreased to less than 0.01 wt.%, 0.01 wt.% and 0.3 wt % respectively and the surface area of product was about 930
/g for conductive materials.
Dehydrochlorination Behavior of Pure PVC Powder
Journal of the Korean Institute of Resources Recycling, volume 10, issue 3, 2001, Pages 60~65
The PVC powder was treated at
, in 0~2 M NaOH solutions for 0~5 h to study the kinetics of dehydrochlorination. In the case of water, the dehydrochlorination of PVC powder proceeded by the zero order reaction with X(the degree of dehydrochlorination), and the apparent activation energy was about 46 kcal/mol. The rate of dehydrochlorination increased with con-centration to 0.5 M NaOH, and proceeded by the first order reaction with X. And, the kinetics of dehydrochlorination was almost equal above 0.5 M NaOH. The apparent activation energies of dehydrochlorination in 0.1 M and 0.5 M NaOH was about 46 kcal/mol, respectively.