• Journal of Energy Engineering
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• v.27 no.1
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• pp.40-50
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• 2018

Today, the development of industries and rapid urbanization has a profound impact on the human environment. It can be said that the environment in the craft village is most affected. The environment in these areas is severely degraded and depending on the type of production, the environment in the craft villages is different. In Phong Khe ward of Bac Ninh Province, Vietnam, there are over 204 small and large facilities of recycling and producing paper. The paper facilities produce about 200,000 tons of paper each year and the amount of paper produced is not less than 500 tons each day in Phong Khe. They are creating livelihoods for more than 6,000 workers and generating local budgets from VND- 50 billion to VND 60 billion per year. Despite this great contribution, the use of old machines and "backward" modes of production means that paper recycling has caused serious air, soil, and water pollution in the region. The specific objectives of this study were as follows: (1) provide an overview of paper production process in the Phong Khe paper craft village; (2) comprehensive literature review of the current status of water environment, atmosphere environment, soil environment and solid waste; (3) figure out about waste treatment in Phong Khe ward.

• Proceedings of the Korea Concrete Institute Conference
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• 2002.10a
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• pp.521-526
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• 2002

In this paper, we described about the characteristic evaluation of environment-friendly ceramic paint with calcium-silicate mineral as a main binder. Particularly, we performed discharge of the environmental poisoning materials(e.g. VOCs, heavy metal, etc.), and properties of paint slurry and coating film of the ceramic paint. In the comparison of the ceramic paint with natural paint and mineral paint which were known as our environment-friendly paints, ceramic paint had good characteristics in the environmental safety and properies of wet slurry and dried coating film.

• The Journal of the Petrological Society of Korea
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• v.18 no.4
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• pp.371-379
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• 2009

A famous foreign mining company in Argentina, Yamana Gold, its profile including company history, current and future mining projects, and production are introduced in this paper for the Korean mining companies those are sincerely looking for reliable collaborative partners to deliver the practical company informations.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.341-342
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• 2010

This paper presents rheology of mortar using mineral admixture(Ground granulated blast furnace slag and Fly ash). The measurement of the rheology of mortar, including viscosity and yield stress, as well as its compressive strength were also carried our.

• The Journal of the Petrological Society of Korea
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• v.18 no.3
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• pp.269-278
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• 2009

A famous foreign mining company in Argentina, Barrick Gold, its profile including company history, current and future mining projects, and production are introduced in this paper for the Korean mining companies those are sincerely looking for reliable collaborative partners to deliver the practical company informations.

• Journal of the speleological society of Korea
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• no.4
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• pp.33-39
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• 1996

Secondary mineral deposits of gypsum, mirabilite, thenardite, crisobolite have long been known and, in fact, are quite common in lava tubes of southwest Idaho. Until recently, calcium carbonate were found in a few tubes in very small amounts and were thought to be qu are. The recent ‘rediscovery’ of Helen's Hidden Hide - Away lava tube h significantly changed this thinking. The deposits in this lava tube are only quite extensive but extremely varied in structure. As this is a v recent discovery, only basic preliminary work will be presented in t paper. It is hoped this will stimulate intrest for further and more inte study of the lava tubes of southwestern Idaho.

• Journal of the speleological society of Korea
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• no.5
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• pp.70-78
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• 1997

Secondary mineral deposits of gypsum, mirabilite, thenardite, and cristpbolite have long been known and, in fact, are quite common in the lava deposits tubes of southwest idaho. Until recently, calcium carbonate were only found in a few tubes in very small amounts and were though to be quite rare. The recent ‘rediscovery’ of Henlen's Hidden Hide -A way lava tube has significantly changed this thinking. The deposits in the lava tube are not only quite extensive but extremely varied in structure. As this is a very recent discovery, only basic preliminary work will be presented in this paper. It is hoped this will stimulate interest for further and more intensive study of the lava tubes of southwestern idaho.

• Clean Technology
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• v.19 no.2
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• pp.75-83
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• 2013

In the present paper, we review recycling and applications of titanium binary alloy scraps. The recycling techniques are to successfully prepare low oxygen content ingots using hydrogen plasma arc melting (HPAM) and to produce low oxygen content titanium alloy powders by Hydrogenation-dehydrogenation (HDH) and Deoxidation in solid state (DOSS) process. In addition, as applications of the titanium binary alloy scraps, Ti based solid-solution carbide powders, which would be used for producing Ti based solid-solution cermets with high toughness, were prepared using the titanium binary alloy scraps. These results confirmed that the titanium alloy scraps could be recycled and refined using the HPAM. The resulting oxygen content of the titanium alloy powders were below 1,000 ppm after powderizing. Finally, we had confirmed that the refined titanium alloy powders were able to be utilized as raw materials for preparing the toughened cermets.

• Journal of Energy Engineering
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• v.29 no.3
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• pp.57-63
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• 2020

In this paper, we reported that the global trend of cement production and utilization as raw materials and as a fuel. As we know, cement is one of the significant materials required for the construction industry. The recent trend of rising urbanization, both the cement and construction industry played a vital role. The cement industry is a major sustainable infrastructure for the countries. Currently, China producing cement half of the world's cement production. During the year 2018, Korea producing cements nearly 57.5 million metric tons. Waste materials are used as circular resources and also having tremendous benefits for cement production. Another important use of these circular resources is fuel for the cement industry. There is a large potential benefit of the cement industry, but it's creating a severe environmental threat. The cement industry contributes to the major emissions of CO2. This leads the global warming. As per the Paris agreement, the Korean government initiated the recycling policy of waste materials and also the utilization of circular resources for the prevention of limited natural resources and also the global warming effect.

• Resources Recycling
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• v.18 no.5
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• pp.72-81
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• 2009

The demand for platinum group metals for various advanced industries has been growing due to their excellent physical and chemical properties. Since the deposit of platinum minerals are restricted to few countries, their recovery from various secondary resources has becomes an important issue to related industries for keeping the supply reliably. In this paper, patents on the metallurgical technologies for the platinum group metals were analyzed. The search of patent was limited to the open patents of USA (US), European Union (EP), Japan (IP), and Korea (KR) from 1986 to 2006. Patents were surveyed using key-words searching and selected by filtering criteria. The trend of patents was analyzed by the years, countries, companies, and technologies.