• Title/Summary/Keyword: copper slag

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The Study on the Property of High Strength Concrete Used Copper Slag (동제련 슬래그 잔골재를 이용한 고강도 콘크리트의 물성에 관한 연구)

  • 박정우;김상미;강태경;백민수;임남기;정상진
    • Proceedings of the Korea Concrete Institute Conference
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    • 2001.11a
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    • pp.99-104
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    • 2001
  • Slag product has the possibility as alternative aggregate and sand under the circumstance of natural resource shortage. Copper slag is the by-product produced in process of copper industry. Recycling the slag in construction industry could give positive effects on the environmental preservation. This study presents that the fundamental properties of high strength concrete which used copper slag as alternative sand. Testing factors are concrete's slump, bleeding, air contents and compressive strength. The results of this study are as follows. (1) Mixing of W/C 30%, substitution rate 25% shows the best slump. As substitution rates are going up, concrete slump is uprising and air contents are downsizing. (2) The bleeding of concrete becomes more serious as substitution rates are going up. (3) The best compressive strength of copper slag concrete is achieved in mixing of W/C 30%, substitution rate 25%.

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Drainage Characteristics of Copper Slag Compaction Pile Installed in Clay Based on the Laboratory Consolidation Model Test (대형압밀시험기를 이용한 동슬래그 다짐말뚝의 배수 특성)

  • 천병식;정헌철;김경민;조한영
    • Proceedings of the KSR Conference
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    • 2001.10a
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    • pp.552-557
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    • 2001
  • Copper slag is the by-producted material on the proceeding of refining the copper. To verify applications of copper slag to vertical drain material can substitute for the sands in ground improvement, laboratory soil tests and consolidation model tests were conducted. The results of consolidation model test was analyzed as the hyperbolic method. The hyperbolic method assumes that the settlement(s) versus time(t) behavior approaches a straight line describes a hyperbolic reaction. The inverse of the slope of the line would then yield the ultimate settlement. Through in this study, copper slag is compatible with vertical drain material as like sands. Copper slag compaction pile promote the consolidation settlement.

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Applications of the Copper Slags as Ground Improvement Material (지반개량재로써 동제련슬래그의 활용에 관한 연구)

  • Chun, Byung-Sik;Jung, Hun-Chul;Cho, Han-Young
    • Journal of the Korean GEO-environmental Society
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    • v.3 no.1
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    • pp.27-36
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    • 2002
  • This study is about the applicability of copper slag as the ground improvement material. By the geo-technical characteristics of the copper slag and by the effect of consolidation and under drainage condition, it is proved that the copper slag can be used for ground improvement material as substitution for sand. As a result of laboratory tests, it was shown that the permeability of the copper slag was similar to that of sands under the vertical drainage condition. In addition, the copper slag showed higher critical hydraulic gradient than that of sand under up-ward vertical flow state. The copper slag has potential safety against piping and it has internal stability of particles. The conclusion is that the copper slag is suitable for drainage and filter material.

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Utilisation of glass powder in high strength copper slag concrete

  • Zaidi, Kaleem A.;Ram, Shobha;Gautam, Mukesh K.
    • Advances in concrete construction
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    • v.5 no.1
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    • pp.65-74
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    • 2017
  • This study was focused on the use of partial replacement of cement with glass powder in high strength concrete and also copper slag as a partial replacement of coarse sand in concrete. The high strength concrete was prepared with different mineral admixtures like silica fume, fly ash and rice ash husk in different proportions. An experimental investigation has been carried to study about the effect of glass powder on high strength copper slag concrete. The range of glass powder was 10%, 15% and 20% as a replacement of cement. The range of copper slag was 0%, 20%, 40% and 60% as a replacement of natural sand. In addition to the different percentage of fly ash, silica fume, and rice husk ash 5% and 10% was also studied in copper slag concrete. Thus, a total of 51 cubes were casted and compressive strength test was performed on them. The result of the study shows that the value of average compressive strength of concrete after addition of 10%, 15% and 20% of glass powder are 70.47, 72.01 and 73.31 respectively. The value of average compressive strength after addition of 20%, 40% and 60% copper slag as a replacement of sand are 72.18, 74.38 and 73.08 respectively. The value of average compressive strength after addition of 5% and 10% fly ash as a replacement of cement are 71.56 and 73.22. The value of average compressive strength after addition of 5% and 10% silica fume as a replacement of cement are 72.33 and 73.53. The value of average compressive strength after addition of 5% and 10% rice husk ash as a replacement of cement are 72.86 and 69.49. At the level of 20% replacement of cement by glass powder meets maximum strength as compared to that of controlled concrete and copper slag high strength concrete.

A Novel Process for Extracting Valuable Metals from Waste Electric and Electronic Scrap Using Waste Copper Slag by a High temperature Melting Method (폐동(廢銅)슬래그를 활용(活用)한 폐전기전자(廢電氣電子) 스크랩으로부터 유가금속(有價金屬) 고온용융추출(高溫鎔融抽出) 공정(工程) 개발(開發))

  • Kim, Byung-Su;Lee, Jae-Chun;Lee, Kwang-Ho
    • Resources Recycling
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    • v.16 no.3 s.77
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    • pp.27-33
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    • 2007
  • It is very important in the view point of resource recycling to recover valuable metals such as copper and tin from waste electric and electronic scrap. The waste electric and electronic scrap contains significant amounts of copper, tin, and so on. In this study, a new process for extracting copper and tin contained in the waste electric and electronic scrap using waste copper slag which is generated from the melting furnace of copper smelter was presented. Advantage of the proposed process is to reuse waste copper slag instead of new fluxes as slag formatives. In each experiment, the waste electric and electronic scrap and waste copper slag were melted inputting suitable amount of CaO as an additional flux. Up to 95% of copper and 85% of tin in the raw material were extracted in a Cu-Fe-Sn alloy phase.

A Study of Copper Production Techniques at the Archaeological Site in Gwanbukri, Buyeo in the 6th and 7th Centuries (6~7C 부여 관북리 유적의 동 생산기법 연구)

  • Lee, Ga Young;Cho, Nam Chul
    • Journal of Conservation Science
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    • v.36 no.3
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    • pp.162-177
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    • 2020
  • Research was conducted to characterize the copper production and smelting process with 11 copper smelting by-products (copper slag and copper crucible) excavated from the NA and LA areas at the Gwanbuk-ri archeological site in Buyeo. Scanning electron microscopy-energy dispersive spectroscopy, wavelength dispersive X-ray fluorescence, X-ray diffraction, and Raman microspectroscopy were employed in the analysis. The research results reveal that the copper slag from Gwanbuk-ri contained silicate oxide, magnetite, fayalite, and delafossite, which are typical characteristics of crucible slag and refined slag. The outward appearance and microstructure of the slag were grouped as follows: 1. glassy matrix + Cu prill, 2. glassy matrix + Cu prill + magnetite, 3. silicate mineral matrix + Cu prill, 4. crystalline (delafossite and magnetite) + amorphous (Cu prill), 5. magnetite + fayalite, and 6. slag from slag. The copper slags from Guanbuk-ri were found to contain residues of impurities such as SiO2, Al2O3, CaO, SO4, P2O5, Ag2O, and Sb2O3 in their microstructure, and, in some cases, it was confirmed that copper, tin and lead are alloys. These results indicate that refining of intermediate copper(including impurities) and refining of alloys of copper(including impurities) - tin and refining of copper(including impurities) - tin - lead took place during the copper production process at Gwanbuk-ri, Buyeo.

A Study on the Improvement of Property of Concrete using Copper Slag and Fly ash (동슬래그 및 플라이애쉬를 혼합하여 제작한 콘크리트의 성능 향상 연구)

  • Kim, Chun Ho;Lee, Won Goo;Kim, Nam Wook
    • Resources Recycling
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    • v.24 no.1
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    • pp.28-34
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    • 2015
  • Generally, when using copper slag mixed into the concrete, due to higher weight of copper slag, a reduction in the compressive strength and durability of the hardened concrete to increased bleeding is caused. In this study, hence copper slag, a kind of by-product was used as an alternative to the fine aggregate, it was carried out in combination with the use of fly ash in eliminating disadvantage and recycling aspects. As a result of this study, the mixing of fly ash is decreased in the 50% of bleeding, 5% of drying shrinkage, 30% of carbonation test and improvement of 10% of compressive strength than that of copper slag only at most.

A Study on the Basic Property of Mortar as the Grading Distribution of Copper Slag Used as Fine Aggregate (잔골재로 사용한 동슬래그의 입도에 따른 모르타르의 기초적 특성 연구)

  • Lee Jong-Chan;Lee Mun-Hwan;Lee Sea-Hyun
    • Proceedings of the Korea Concrete Institute Conference
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    • 2005.05b
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    • pp.97-100
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    • 2005
  • The purpose of this study is to research the basic property of mortar as the grading distribution of copper slag used as fine aggregate and the results are as follows. The compressive strength of mortar as the size of largest diameter of copper slag granule is the highest when the largest size is in 2.5-5mm, and flow of mortar is in proportion to the size. As the largest size of copper slag particle is under 2.5mm(Type 1) the compressive strength and flow is higher as the big granules is more included than small ones. As the largest size of copper slag granule is under 5mm(Type 2) the compressive strength and flow is similar to situation of Type 1, except compressive strength is higher as the percent of the size of granule in $2.5\~5mm$ is under 35$\%$. F.M.(Fine Modulus), compressive strength and flow is relative each other except the batch with 2.5$\∼$5mm granule size of copper slag.

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A Study on the Fundamental Characteristics of a Copper Slag Mixed with Granite Soil (동슬래그 혼합토의 기본 성질에 관한 연구)

  • 김영진;배정호;홍승서
    • Proceedings of the Korean Geotechical Society Conference
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    • 2000.11a
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    • pp.447-454
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    • 2000
  • This paper presents fundamental characteristics of a copper slag when used geotechnical materials. For this study, it was conducted laboratory tests such as compaction, large direct shear, hydraulic conductivity, leaching, TDR, frost heave test and so on. The results of laboratory tests shown gradually increase in draining capacity and shearing resistance more slag mixing. The unfrozen water in temperature changes and frost heave amounts in condition of -17 $^{\circ}C$ appeared to decrease. Also, toxicity tests based on the domestic solid waste regulations were satisfied with nonhazardous. By this research results, a copper slag mixed with granite soil may been used as granular base and embankment materials, fill etc.

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A Study on the Phrsical and Mechanical Properties of Concrete with Ferro Copper Slag (동슬래그를 잔골재로 사용한 콘크리트의 물리.역학적 특성에 관한 연구)

  • Lee, Mun-Hwan;Lee, Sea-Hyun;Song, Tae-Hyeob
    • Journal of the Korea Concrete Institute
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    • v.15 no.3
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    • pp.361-368
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    • 2003
  • As the supply of aggregate needed in the construction site becomes difficult due to preservation of environment and exhaust of aggregate resource, a research for replacement aggregate in shortage is being actively progressed and a copper slag is also a kind of replacing aggregate. To use copper slag as fine aggregate of concrete, many studies are already conducted in each of the advanced countries and in the state of applying these at the site. In the year of 2000 a Korea industrial standard of Copper slag aggregate for concrete was established in our country so that this can be applied in the construction site. This study is to find out whether copper slag is equipped with the physical and chemical requirements for the use in concrete aggregate, and to analyze the dynamic properties of copper slag concrete that replaces 25, 50, 75, 100% of fine aggregate. Copper slag study not only satisfies the using condition of fine aggregate, but also reveals high level of physical property compared to ordinary concrete up to 50% of sand replacement rate. In the future after confirming the durability of concrete using copper slag, it is judged to be advantageous for the preservation of environment to use this as a replacement material for natural aggregate.