• Resources Recycling
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• v.27 no.2
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• pp.68-76
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• 2018

EAF (Electric arc furnace) dust is an important secondary resource such as zinc, lead, and iron. Recycling of EAF dust is benefit to solving disposal and environmental problems caused by the heavy metals entrained in the dust. In this study, pyrometallurgical treatment technology of EAF dust reviewed for the improvement of conventional process and development of new process. The existing technologies categorized into four groups: those by rotary kiln process, rotary hearth furnace (RHF) process, shaft type process, and reduction smelting process. The product of these processes are ZnO and Fe or slag as a waste. Their mechanisms for the production of ZnO from EAF dust were carbothermic reduction and oxidation of zinc gas with air.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.77-78
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• 2006

Post industrial technologies have improved human standard of living, however, a host of negative environmental consequences from the unlimited industrial appetite have posed serious global challenges. Remanufacturing is an industrial manufacturing process that is to restore old products to perform like a new and to save energy, natural resources, landfill space and to reduce air pollution by less re-smelting. By extending product life cycle, remanufacturing gives us enormous opportunities for sustainable development of our society. This paper introduces current state of the art and future perspective in the field of automotive remanufacturing focusing on alternator and start motor. The results could be used as a basic information for further remanufacturing applications in Korea.

• Transactions of the Korean Society of Automotive Engineers
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• v.17 no.1
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• pp.120-129
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• 2009

Remanufacturing is an industrial manufacturing process. The merits of remanufacturing are to reuse old products to perform like a new product and to save energy, natural resources, landfill space and to reduce air pollution by less re-smelting. This paper proposes a systemic approach for activating the domestic remanufacturing industry. The approach is based on inside and outside regulations to apply remanufacturing companies. And, we analyzed the state and problems of remanufacturing industry for automobile parts. Also 5 essential tactics and 20 detail strategies are suggested. On the basis of the approach, the domestic remanufacturing industry will carry out the cooperation for their competitions.

• (The) Research of the performance art and culture
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• no.37
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• pp.127-155
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• 2018

This paper considers the structure and meaning of the folktale accompaniment of the sound of UlsanSoeburisoree. The review process examined the meaning of each structure of the UlsanSoeburisoree in the preparation process while preparing the main elements of the structural features along with the historical background of the structure. UlsanSoeburisoree is Poongcheol ritual ceremony which means prayer ceremony for the production of iron. The sound of UlsanSoeburisoree is 1-Gilnori 2-Gosa 3-The sound of blowing smelting process 4-The sound of process of iron smelting 5-The sound of tabooline 6-The sound of blowing smelting process 7-The sound of blowing matches 8-The After-party. This structure is in line with the structure of folk play called Gilnory-Gosa-Performance-After-party. This is similar to the basic structure of folk beliefs Cheongsin(請神)-Osin(娛神)-Songsin(送神). Thus, the sound of UlsanSoeburisoree was formulated in a sequential parallel structure. The sound of UlsanSoeburisoree resemble the sacrifice of heaven ceremony since the time of the SamHan dynasty. The sound of the birth of life by physical sacrifice also plays the role of the song of creation of new life. The sound of UlsanSoeburisoree can be seen not only in Korea 's folk culture but also in folk culture of GyeongnamDo area. There are many festivals to pray for the abundance of life for UlsanSoeburisoree. Soil plays an absolute role in the process of producing iron. For those who soak it, the earth is a religious object. Among the folk tales handed down in the Yeongnam area, there are a lot of performances that are passed down through the blending of the people 's affection to overcome the harshness of life. In the case of the sound of UlsanSoeburisoree, it can be said that it was made and mixed with the wind that wanted to go beyond the harshness of life and the spirit of art.

• Journal of Korean Society for Atmospheric Environment
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• v.31 no.2
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• pp.118-130
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• 2015

Fine dust containing iron compounds is of current interests in metro subway as well as large scale industries including iron manufacturing and smelting works. This work attempts to find a new design of magnetic filter module for iron dust capture. It simulated the vertical rectangular duct with metal mesh which might promote electric fields in the duct space. A lab test using coal fly ash composed of 8.66% Fe with the most form of $Fe_3O_4$ and $Fe_2O_3$ showed capability of magnetic collection. It showed the capture efficiency with 80~93% for $PM_{2.5}$ depending on magnetic intensity. Ferromagnetic wire mesh contributed up to 50% of collection increment.

• Resources Recycling
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• v.23 no.6
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• pp.12-21
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• 2014

Nickel oxide ores are composed of two kinds of minerals; one is saprolite that is processed by smelting to obtain nickel products, and the other is limonite that is used in hydrometallugical processes. It is not efficient economically to process the mixture of limonite and saprolite, so the processes to saparate the ore mixture should be developed. In the present study, the mixture was separated by dry-classification after liberationg using grindability difference between limonite and saprolite. Consequently, it is possible to obtain the limonite with less than 10% of Mg+Si contents, which could be treated by hydrometallurgical processes, when the limonite contain less than 30% of saprolite.