Solidification and stabilization of harmful elements in antimony tailings and synergistic utilization of multiple solid wastes

Wu, Fang; Liu, Xinxin; Qu, Guangfei; Ning, Ping; Jin, Caiyue; Cui, Qingyuan; Ren, Yuanchuan; He, Minjie; Yang, Yuyi; Li, Junyan

doi:10.1016/j.cemconcomp.2022.104718

Cited by 16 publications

(2 citation statements)

References 36 publications

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“…When antimony tailings were used as coarse aggregate, the specimens had better tensile strength and compressive modulus of elasticity than the concrete using a natural rock as coarse aggregate; the cubic compressive strength, splitting tensile strength, and prismatic compressive elastic modulus are 1.31, 2.22, and 1.40 times that of natural rock, respectively, but their alkali activity and cracking sensitivity were less compared to conventional concrete. Wu et al [31] used Portland cement, S95 slag powder, fly ash, phosphogypsum, water-based aluminum powder paste, foaming agent, and antimony tailings to prepare test blocks and put them into molds. After curing for 3 d, 7 d, 14 d, and 28 d, the compressive strength, flexural strength, and toxicity leaching were measured.…”

Section: Using Antimony Tailings To Prepare Raw Materials For Buildin...mentioning

confidence: 99%

Present Situation and Research Progress of Comprehensive Utilization of Antimony Tailings and Smelting Slag

Yu,

Wang,

Zheng

et al. 2023

Sustainability

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The production process of antimony produces a large amount of solid waste, such as waste rock in mining, tailings in the beneficiation, metallurgical slag in the smelting, and so on. At present, most of these solid wastes are currently in storage, and the storage of a large amount of solid wastes is not only harmful to the local ecological environment but also a waste of resources. In view of this situation, this paper will take antimony tailings and metallurgical slag as examples and summarize them according to their different treatment methods. The comprehensive utilization of antimony tailings is mainly recovering metals by beneficiation and metallurgy and using antimony tailings as building materials and underground filling materials, while the comprehensive utilization method of antimony metallurgical slag is mainly the recovery of valuable metals by pyrometallurgy or hydrometallurgy or the stabilization technology. This paper summarizes the advantages and disadvantages of different treatment methods and puts forward the prospect of future research directions for the treatment of different metallurgical slags and tailings.

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Section: Using Antimony Tailings To Prepare Raw Materials For Buildin...mentioning

confidence: 99%

Present Situation and Research Progress of Comprehensive Utilization of Antimony Tailings and Smelting Slag

Yu,

Wang,

Zheng

et al. 2023

Sustainability

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show abstract

“…However, reducing the amount of cement has become a key objective due to the high production cost and the production of a high number of pollutants such as CO, which consumes energy and pollutes the environment [16]. Related studies, such as that of Feng et al [17], using cement stabilization to solidify antimony mine tailings concluded that with a higher tailing content (75% and 90%), the mechanical strength and heavy metal immobilization capacity decreased significantly. Yong et al [18] stabilized and cured lead and cadmium tailings through a clinkerless binder, reducing the amount of cement used and lowering the cost of the cement used.…”

Section: Introductionmentioning

confidence: 99%

Performance and Heavy Metal Analysis of Graphite Tailings Cured Using Cementitious Materials

Jiang,

Wang

2024

Buildings

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The massive accumulation of graphite tailings causes serious environmental pollution, mainly from heavy metal pollution. Therefore, this article introduces a method of using graphite tailings as a high-content main material, cement as a small component of the auxiliary cementitious material, and clay as a substitute for cement. The compressive strength and permeability of graphite tailing–solidified material (GT, GT–Clay) were tested, and the effect of clay partially replacing cement as an auxiliary cementitious agent on GT–Clay performance was compared. In addition, inductively coupled plasma mass spectrometry (ICP) was used to analyze the effect of the graphite tailing placement time on the heavy metal content, as well as the changes in the GT heavy metal leaching concentration and its heavy metal content under outdoor freeze–thaw conditions. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to elucidate the microstructural changes in the GT–Clay. The experimental results show that, as the substitution of clay for cement increased from 0 to 50%, the compressive strength of the 90% GT–Clay gradually decreased, and the permeability also increased. The compressive strength of 95% GT–Clay did not show significant changes, but the permeability increased, and when mixed with quicklime, gypsum, and silica fume, the permeability decreased. The Ni and As in graphite tailings fluctuated significantly with the placement time. The heavy metal leaching concentrations of the 90% GT and 95% GT were below the standard limit, and Cd, As, and Ni in GT were potential sources of pollution. The analysis of the microscopic test results showed that the hydration products of the GT–Clay included ettringite, Ca(OH)2, and calcium silicate hydrates. The hydration product stabilized and filled the gaps between the tailing particles, thereby cementing them together. Not only did it improve the mechanical strength of GT, it also reduced the permeability and heavy metal leaching rate. This study provides a new analytical approach to applying graphite tailings for environmental treatment.

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Leaching toxicity and deformation failure characteristics of phosphogypsum-based cemented paste backfill under chemical solution erosion

Yao

et al. 2023

Environ Sci Pollut Res

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Solidification and stabilization of harmful elements in antimony tailings and synergistic utilization of multiple solid wastes

Cited by 16 publications

References 36 publications

Present Situation and Research Progress of Comprehensive Utilization of Antimony Tailings and Smelting Slag

Present Situation and Research Progress of Comprehensive Utilization of Antimony Tailings and Smelting Slag

Performance and Heavy Metal Analysis of Graphite Tailings Cured Using Cementitious Materials

Leaching toxicity and deformation failure characteristics of phosphogypsum-based cemented paste backfill under chemical solution erosion

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