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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 20, Issue 6 - Dec 2011
Volume 20, Issue 5 - Oct 2011
Volume 20, Issue 4 - Aug 2011
Volume 20, Issue 3 - Jun 2011
Volume 20, Issue 2 - Apr 2011
Volume 20, Issue 1 - Feb 2011
Selecting the target year
Status of EAF Dust Management in Taiwan
Chen, Wei-Sheng ; Chou, Wei-Shan ; Tsai, Min-Shing ;
Journal of the Korean Institute of Resources Recycling, volume 20, issue 1, 2011, Pages 3~13
DOI : 10.7844/kirr.2011.20.1.003
Taiwan`s annual steel production reached 21.29 million tons. EAF accounted for about half of this total, or 11.2 million tons in 2008. The other 10.09 million tons came from blast furnace and converter process methods. The annual EAF carbon steel production is about 9.76 million tons, and the quantity of dust generated from the EAF process is 160 thousand tons, or about 16kg of dust per ton of steel was produced. In 2009, there is Walez process for carbon steel EAF dust recycling, and the capacity is about 70,000 tons per year; and there is RHF/SAF process for stainless steel EAF dust, the capacity is 60,000 tons per year which is enough to treat stainless steel EAF dust in Taiwan. There are many new treatment facilities processes will be that introduced to recycle the EAF dust in the near future, these processes will perform smoothly and successfully in Taiwan. The estimation of recycled crude ZnO is about 90,000 tons each year. The recycling and upgrading crude zinc oxide will be the next important issue in Taiwn zinc and steel industry.
Automotive Recycling System and Recycling Business of Dismantler in Japan
Oh, Jae-Hyun ; Kim, Joon-So ; Moon, Suk-Min ; Min, Ji-Won ;
Journal of the Korean Institute of Resources Recycling, volume 20, issue 1, 2011, Pages 14~27
DOI : 10.7844/kirr.2011.20.1.014
In order to review the End-of Life Vehicle(ELV) recycling system and recycling business of dismantlers in Japan, scheme of the automobile recycling law, status of ELV recycling, exports of used cars, ELV marketing business of dismantler and upgrading of used parts net work were studied. On the other hand, field survey in details for dismantling works were conducted at West-Japan Auto Recycling Co.. Although the ELV recycling system has been operating smoothly without any noticeable trouble, recycling business is running under severe circumstance. Exports of used cars have been increasing day by day through worldwide 176 countries. Finally, reuse parts of ELV concerning innovation marketing was discussed.
Study on Recycling of Refractory Materials from High-Temperature Melting Furnace by Color Sorting Technology
Seo, Kang-Il ; Lee, Deok-Hee ; Choi, Woo-Zin ; Jang, Jung-Hoon ; Park, Eun-Kyu ; Oh, Young-Gil ;
Journal of the Korean Institute of Resources Recycling, volume 20, issue 1, 2011, Pages 28~36
DOI : 10.7844/kirr.2011.20.1.028
More than 50% of refractory materials generated from high-temperature melting furnace was not carbonized and could be recycled by adopting proper separation process. In the present work, the separation of refractory materials has studied by adopting color sorting technology to promote the recycling of waste refractory. Purity of the refractory materials was obtained with at 97.2%, color temperature of sorter light source 6,500K, which gives less interference of surrounding light source. Purity and separation efficiency were improved as size is setting bigger and lower conveyer belt speed. It is revealed that optimum conditions were color temperature 6,500K, conveyer belt speed 1,000 mm/sec, particle size -20 mm, etc. To improve purity and separation efficiency on below 10mm size, the resolution of should be fixed camera and it narrow recognition range. As a result of the study, color sorting technology could be used for separation of waste refractory materials and will contribute to promote the waste recycling.
Development of Non-sintered Construction Materials for Resource Recycling of the Flotation Tailings
Kim, Joo-Ik ; Jung, Moon-Young ; Park, Jay-Hyun ; Lee, Jin-Soo ;
Journal of the Korean Institute of Resources Recycling, volume 20, issue 1, 2011, Pages 37~45
DOI : 10.7844/kirr.2011.20.1.037
This study was conducted to recycle flotation tailings as non-sintered construction materials considering the economic and eco-friendly treatments. The particle size distribution( median
) of flotation tailings from Soon-shin mine was confirmed to be larger than that(median
) of tailings from Sam-kwang mine. Thus we investigated the properties of non-sintered eco-brick producted with the tailings from Sam-kwang mine and non-sintered water permeable block producted with the tailings from Soon-shin mine. Compressive strength of non-sintered water permeable block which was made with less than 25 wt% of tailings from Soon-shin mine was met with products class(over 14.70 MPa) of water permeable concrete(EL 245) from KEITL. Meanwhile, the coefficient of its permeability wasn`t met with the products class( over
). The properties of non-sintered eco-brick with less than 40 wt% of tailings from Sam-kwang mine were satisfied with third class in sintered clay brick products standard(KS L 4201). The non-sintered eco-brick as a result of leaching test on heavy metals by KSLT was verified to be environmentally stabile.
Properties of Concrete using Surface Treatment Recycled Aggregates and Steel Fibers
Bae, Ju-Seong ; Kim, Nam-Wook ;
Journal of the Korean Institute of Resources Recycling, volume 20, issue 1, 2011, Pages 46~53
DOI : 10.7844/kirr.2011.20.1.046
The recycled aggregate produced from the waste concrete have the disadvantages in the quality for the natural aggregate. Therefore, in order to reuse the recycled aggregate widely it is a previous subject to improve the quality of recycled aggregate. We deduced the more effective surface treatment method using the colloidal silica solution for quality improvement of recycled aggregate. This study aimed to verify the influences of the deduced surface treatment method and the reinforcement of steel fiber to the properties of concrete. For this object, we inquired into the results of the strengths and the flexural failure tests for the five kinds of concrete specimens.
Manufacturing of Artificial Lightweight Aggregates using a Coal Fly Ash Discharged from Fluidized Bed Combustor
Kang, Min-A ; Kang, Seung-Gu ;
Journal of the Korean Institute of Resources Recycling, volume 20, issue 1, 2011, Pages 54~60
DOI : 10.7844/kirr.2011.20.1.054
The spherical artificial aggregates (AAs) with a diameter of 8 mm, which contains fly ashes discharged from the fluidized bed combustion in a thermal power plant and clay were manufactured by direct sintering method at
for 10 minutes. The effect of fly ash contents on the bloating phenomenon in the AAs was analyzed. The AAs containing fly ash of the amount under 50 wt% showed the black-coring and bloating phenomena. The AAs containing fly ash of the amount over 5Owt%, however, the specific gravity was increased and the color of specimens fully changed to black. These color change phenomena were caused from the formation of FeO by the reduction reaction of almost
component by the excessive reducing atmosphere formed simultaneously with the rapid emission of the gases generated from the high contents of unburned carbon of with increasing the added fly ash amount. Specific gravity was decreased as fly ash contents increased in the case of sintering at the same temperature condition. Water absorption of all specimens except of the specimens containing 10 wt% fly ashes decreased with increasing sintering temperature. These were because a liquid phase was formed as the increasing the sintering temperature. In the case of the specimens manufactured in this study containing fly ashes discharged from the fluidized bed combustor in a the thermal power plant and 10~90 wt% of clay, the specific gravity was 0.9~1.8 and the water absorptivity was 8~60%, therefore it is considered that those results can be applied to the light or heavy aggregates.
Removal of Impurities from Metallurigical Grade Silicon by Acid Washing
Lee, Man-Seung ; Kim, Dong-Ho ;
Journal of the Korean Institute of Resources Recycling, volume 20, issue 1, 2011, Pages 61~68
DOI : 10.7844/kirr.2011.20.1.061
Impurity removal from metallurgical grade silicon by acid washing at
was investigated by employing sulfuric, nitric acid and the mixture of hydrochloric and hydrofluoric acid. Acid washing treatment had no effect on the removal of boron and the concentration of this clement after treatment was rather increased. In our experimental range, the removal percentage of phosphorus was 60%. In the acid washing with sulfuric and nitric acid, the removal percentage of major impurities was below 50%, which indicates that refining effect was not great with these acids. Acid washing with the mixture of hydrochloric and hydrofluoric acid led to removal percentage of higher than 90%. Data on the purity of silicon after acid washing at various conditions are reported.
Microstructure Control, Forming Technologies of Mg Alloys and Mg Scrap Recycling
Shim, Jae-Dong ; Lee, Dong-Hui ;
Journal of the Korean Institute of Resources Recycling, volume 20, issue 1, 2011, Pages 69~79
DOI : 10.7844/kirr.2011.20.1.069
Recently, magnesium alloys are in the spotlight as a promising materials in the fields of automobile parts and electronic appliances due to their merits representing light weight, high specific strength, damping property, shielding of electromagnetic wave and so on. However, magnesium alloys show a poor formability at room temperature because magnesium has HCP crystal structure with limited slip planes and strong basal texture is formed during plastic deformation process such as rolling and extrusion. Therefore, many R&D efforts have been paid for improvement of formability through grain refinement, texture control and various forming technologies. This paper is giving an overview about recent achievements on control of microstructures, forming technologies and magnesium scrap recycling.