Potential utilization of hazardous mining wastes in the production of lightweight aggregates

Hyunsik Park; Minchul Ha; Doyun Shin; Minseok Kim; Il Sohn

doi:10.1080/03719553.2017.1288359

Potential utilization of hazardous mining wastes in the production of lightweight aggregates

Hyunsik Park, Minchul Ha, Doyun Shin, Minseok Kim, Il Sohn

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Lightweight aggregates from mixtures of gold tailing, red mud and waste limestone were produced using a high-temperature sintering process. Raw materials were quantitatively analyzed, and hazardous materials were identified by chemical analysis. An oxide system corresponding to the major components of the mining waste was carefully designed based on the CaO–FeO_x–Al₂O₃–SiO₂ quaternary system similar to lightweight aggregates. Sintering, softening and melting behaviour of the sample was investigated to optimize the sintering conditions. After heating, specimens were analyzed to clarify its sintering mechanism. Phase change during sintering was observed by X-ray diffraction, and the effect of temperature on the structural unit changes of the specimen was confirmed by Fourier transform-infrared spectroscopy. Microscopic analysis by scanning electron microscope-energy dispersive X-ray analysis was carried out to identify the morphological changes of the sample. Physical properties of the specimen were measured, and the compressive strength was improved with less water absorption.

Original language	English
Pages (from-to)	62-71
Number of pages	10
Journal	Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy
Volume	127
Issue number	1
DOIs	https://doi.org/10.1080/03719553.2017.1288359
Publication status	Published - 2018 Jan 2

Bibliographical note

Funding Information:
The research was supported by the Basic Research Project (GP2017-025) of the Korea Institute of Geoscience and Mineral Resources (KIGAM), funded by the Ministry of Science, ICT and Future Planning of Korea.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Geotechnical Engineering and Engineering Geology
Geochemistry and Petrology

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title = "Potential utilization of hazardous mining wastes in the production of lightweight aggregates",

abstract = "Lightweight aggregates from mixtures of gold tailing, red mud and waste limestone were produced using a high-temperature sintering process. Raw materials were quantitatively analyzed, and hazardous materials were identified by chemical analysis. An oxide system corresponding to the major components of the mining waste was carefully designed based on the CaO–FeOx–Al2O3–SiO2 quaternary system similar to lightweight aggregates. Sintering, softening and melting behaviour of the sample was investigated to optimize the sintering conditions. After heating, specimens were analyzed to clarify its sintering mechanism. Phase change during sintering was observed by X-ray diffraction, and the effect of temperature on the structural unit changes of the specimen was confirmed by Fourier transform-infrared spectroscopy. Microscopic analysis by scanning electron microscope-energy dispersive X-ray analysis was carried out to identify the morphological changes of the sample. Physical properties of the specimen were measured, and the compressive strength was improved with less water absorption.",

author = "Hyunsik Park and Minchul Ha and Doyun Shin and Minseok Kim and Il Sohn",

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Potential utilization of hazardous mining wastes in the production of lightweight aggregates. / Park, Hyunsik; Ha, Minchul; Shin, Doyun; Kim, Minseok; Sohn, Il.

In: Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy, Vol. 127, No. 1, 02.01.2018, p. 62-71.

Research output: Contribution to journal › Article › peer-review

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AU - Sohn, Il

N1 - Funding Information: The research was supported by the Basic Research Project (GP2017-025) of the Korea Institute of Geoscience and Mineral Resources (KIGAM), funded by the Ministry of Science, ICT and Future Planning of Korea.

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N2 - Lightweight aggregates from mixtures of gold tailing, red mud and waste limestone were produced using a high-temperature sintering process. Raw materials were quantitatively analyzed, and hazardous materials were identified by chemical analysis. An oxide system corresponding to the major components of the mining waste was carefully designed based on the CaO–FeOx–Al2O3–SiO2 quaternary system similar to lightweight aggregates. Sintering, softening and melting behaviour of the sample was investigated to optimize the sintering conditions. After heating, specimens were analyzed to clarify its sintering mechanism. Phase change during sintering was observed by X-ray diffraction, and the effect of temperature on the structural unit changes of the specimen was confirmed by Fourier transform-infrared spectroscopy. Microscopic analysis by scanning electron microscope-energy dispersive X-ray analysis was carried out to identify the morphological changes of the sample. Physical properties of the specimen were measured, and the compressive strength was improved with less water absorption.

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