• Geophysics and Geophysical Exploration
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• v.17 no.4
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• pp.247-252
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• 2014

Gagok Mine, which is skarn deposits, includes sulfide minerals such as sphalerite, galena, chalcopyrite, and pyrrhotite. To explore these minerals, spectral induced polarization (SIP) is relatively effective compared to other geophysical exploration methods because there is a strong IP effect caused by electrode polarization. In the SIP, the chargeability related to sulfide mineral contents and the time constant related to the grain size of the minerals are obtained. For this reason, we aim to compare difference in the mineralized characteristics between two orebodies in the Gagok Mine by using the chargeability and the time constant. For this study, we sampled ores from the south of Wolgok orebody and the north of Sungok orebody. In order to recognize the mineralization characteristics, the metal content of the samples was measured by a potable XRF and the SIP data of the samples were acquired by using a laboratory SIP measurement system. As a result, the metals in the samples such as Pb, Zn, Cu, and Fe were detected by the portable XRF measurement. In particular, the Fe and Zn contents were far higher than the other metals. The Fe and the Zn were caused by the sphalerite and the pyrrhotite through microscopy. The Wolgok orebody had higher sulfide mineral contents than the Sungok orebody and the result corresponded with the chargeability result. However, we considered that the Sungok orebody had a larger sulfide mineral grain size than the Wolgok orebody because the time constant of the Sungok orebody was larger.

• Economic and Environmental Geology
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• v.37 no.1
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• pp.113-119
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• 2004

Mineral wastes are generated by the minerals, mining, and metal industries. These are generally inorganic waste streams of mainly waste rock or residues from refining during extraction of metals or minerals from the ore. There are many plants where minerals are recovered in secondany circuits, treating tailings, where the feed grades are much lower than would be economic on a mined ore. The world is now becoming aware of the finite nature of its resources at a price, and of the ever-increasing development costs of large new mines. Reprocessing of old tailings on a large scale must be worth examining very seriously by those with access to sufficient material of this type. In the present paper, mineral separation techniques to recover valuable metals and resources from the old tailings are reviewed, and new trends for future developments are also discussed.

• Journal of the Mineralogical Society of Korea
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• v.23 no.3
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• pp.251-265
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• 2010

A column bioleaching experiment at room temperature with no addition of sulfuric acid was effectively carried out to leach the valuable elements from pyrite, which is common mine waste. The Fe concentration of pyrite leachate from bioleaching column was 14 times higher than that of the control leachate, and secondary minerals were not formed. The $SO_4^{2-}$ concentration of the pyrite leachate was 2.99 times higher. The XRD intensity of the (111), (200), (220), (311), (222), (230) and (321) planes of pyrite decreased, whereas the intensity of (210) and (211) increased after column bioleaching.

• Mineral and Industry
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• v.15 no.1
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• pp.15-24
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• 2002

납석은 전남 일대를 중심으로 약 5,200만 톤이 부존 되어 있고 매년 약 80-90만 톤씩 생산되고 있어 , 국내 비금속광 중 생산액 순으로 4위 정도를 차지하고 있다. 수요의 대부분은 국내에서 조달하고, 생산량의 약 30% 정도를 수출하고 있지만 최근에는 고품위 광석을 중심으로 수입이 증가하는 추이를 보이고 있다. 방석의 국내 수요도 과거에는 내화벽돌용이 주를 이루었지만 근래에는 유리 장성유용이 가장 큰 시장역할을 하는 것으로 변모하였다. 물량만으로는 시멘트 부원료용이 가장 많지만 가격이 낮아 시장규모는 별로 크지 못하다. 시장가격을 기준으로 추정한 국내 납석시장의 규모는 수출시장을 포함할 경우 200억 원 규모이지만 소수의 상위 생산광산에서 주요한 시장을 차지하고 있어 다수의 소규모 광산들은 약 40억원 정도의 시장을 두고 경쟁하고 있다. 납석은 저가 광물인 만큼 고부가가치화를 시키려는 노력이 필요하며, 다량 부존되어 있는 저품위광을 활용하기 위한 노력과 다른 비금속광물과의 경쟁력을 지닐 수 있도록 분체물을 처리하는 분야의 연구 역시 필요할 것이다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2005.04a
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• pp.247-248
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• 2005

중금속의 용해도에 미치는 지배요인 중에서 금속의 지화학적 phases, 용액의 pH 및 반응 시간 등이 중금속 원소의 용해에 미치는 영향을 규명하고자 하였다. 실험결과, 청양광산의 과거 광산사무실에 있었던 장소의 광미들은 탄산염광물을 함유하는 것으로 보이고 하천 둑에 땋여있는 광미들보다 산화작용이 더 많이 진행되어 있는 것으로 판단된다.

• Resources Recycling
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• v.21 no.3
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• pp.3-14
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• 2012

In order to review the recycling status of urban mine resources in China, recycling of ELV(End of Life Vehicles), E-waste(WEEE) and nonferrous metals were surveyed. Number of the sales volume of the new vehicles were over more than ten million and number of discharge vehicles are increasing now. However, recycling system has not been managed smoothly in China. Though usage of home appliances in urban is similar with advanced countries, there are significant differences in rural community. In the other hand, China is the country with the largest E-waste import in the world. Production and consumption of the nonferrous metals are increasing year by year in China, but recycling of metals is not enough.

• Journal of Korea Soil Environment Society
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• v.2 no.3
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• pp.39-47
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• 1997

Geochemical study was carried out to find out the distribution of metals and cyanide in soil in the vicinity of the abandoned Daduck mine and the reason for acid mine drainage occurrence in the tailings impoundment. Chemical analysis showed that content of As in soil around tailings exceeded 15mg/kg, Korean standard of soil contamination in the farm land. That means the contamination of soil by As is due to input of tailings. According to total decomposition of tailings, As, Cd, Cu, Pb, Zn and S were highly concentrated in tailings. However the water in tailings impoundment was changed to acidic and contaminated by metals and sulfate because the tailings in the top of the tailings impoundment had been oxidized. Acid mine drainage contaminated the water course in the vicinity of the paddy soils. The proper measures are required to prevent contamination of the soil and water in the vicinity of the Daduck mine.

• Journal of Korean Society of Environmental Engineers
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• v.22 no.3
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• pp.463-473
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• 2000

This research was carried out to investigate chemical pretreatment using limestone in treating abandoned metallic mine drainage with anaerobic biological treatment, and to estimate application of papermill and livestock sludge as carbon sources for SRB (Sulfate Reducing Bacterial. Capacity of anaerobic limestone bed was steeply decreased. But if limestone was utilized as pretreatment process in treating them with anaerobic biological treatment. it could look forward to stabilize system because it did initally neutralize them. Effluent SCOD in R-4 was lower than R-l~R-3 in inital HRT 5day but its concentration was high in HRT 1day after passed time. Therefore in point of durability and supply of organic matter. it seemed that R-4 was useful became organic matter in R-4 was not consumed by excessive degradation within short period. In all reactors, pH was suitable for SRB growth in whole HRT, but on the evidence of ORP, SRB was active after HRT 2day. Fixation trend of heavy meta s showed high as $SO_4{^{2-}}$ reduction efficiency increased, and $SO_4{^{2-}}$ reduction and fixation of heavy metals were relatively high in HET 2day.

• Journal of the Korean GEO-environmental Society
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• v.12 no.12
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• pp.71-78
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• 2011

This paper aims to present the evaluation of engineering characteristics and reusing possibility of waste powders produced in dolomite and limestone nonmetal mining by physical and mechanical experiments on compaction, uniaxial compressive strength, permeability, chemical composition, and so on. Granite soil, 2 types of limestone waste powder, and 1 type of dolomite waste powder were used for main materials, and cement and bentonite were used for admixed materials in this experiments. The findings based on the experimental results are the severe difference of chemical composition of the dolomite & limestone waste powder and the crushed rock waste powder, and the outstanding of engineering characteristics of the dolomite waste powder with high content of MgO compared with the limestone waste powder. The engineering properties on compaction, uniaxial compressive strength, and permeability are enhanced with increase of admixed ratio of waste powder on granite soil. From the experimental results, it can be suggested that the dolomite waste powder admixed with in-situ granite soil is useful as geo-materials with considering of distribution costs.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.9
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• pp.355-361
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• 2018

Mining is important as a national key industry that supplies energy and raw materials that are the basis for industrial development. On the other hand, mine development is necessarily accompanied by mineralization, for example, ground subsidence, heavy metal pollution, and water pollution. The mine hazard has a large range of damage, and it takes much time and cost to recover. In addition, there is a need for systematic mining management in order to prevent damages from occurring continuously. In this study, the present status of domestic mining industry and geospatial information construction technology for mining management were investigated. 95% of the mines surveyed were nonmetallic, and limestone mines accounted for 67%, and the constructed mine spatial information is not constructed with 3D geospatial information due to 2D current status, section, and geological map. Considering the results of the survey and analysis of 3D laser scanner and characteristics of Korean mine, handheld scanner is considered to be the most suitable method for constructing mine geospatial information. In addition, the data acquired through the 3D laser scanner can effectively visualize the object, and it can contribute to the systematic management of mining because it can be used for various purposes such as generation of drawings and calculation of volume.