DOI: 10.1016/J.CONBUILDMAT.2018.11.236 Corpus ID: 139908662; Preparation and characterization of Portland cement clinker from iron ore tailings @article{Young2019PreparationAC, title={Preparation and characterization of Portland cement clinker from iron ore tailings}, author={G. Young and Mei-Zhen Yang}, …
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Iron Ore Tailings (IOT) are the waste slag resulted from iron ore mines. Large amount of Iron Ore Tailings (IOT) have been generating every year posing serious environmental problems, large production of cement everyday resulting the emission of CO 2 and increase in the consumption of river sand for construction activities making the river beds over …
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— The aim of this study is to investigate the utilization of the tailings taken from a chrome ore concentration plant in Eskisehir, Turkey as fine aggregate in ready-mixed concrete production.
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A discussion of tailings dam construction is found in the SME Technical Paper "An Introduction to Tailings Facilities. i " Background. What are Tailings? Tailings are a by-product of mining. After ore containing an economically-recoverable commodity is mined from the earth, that commodity is extracted in a processing plant or mill.
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— The present work evaluated the possibility of using iron ore tailing as an addition to the partial replacement of the cement in mortars. The iron ore tailings were processed by drying in oven (48h at 105oC) and milling in a planetary mill (10min at 300RPM), obtaining medium grain size of 14,13 μm. ... Abstract The cement industry …
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— This study investigated the feasibility of utilizing industrial byproduct iron ore tailings and carbon fiber cement-based materials (ICCM) in sulfate freeze-thaw (F-T) environments. ... The recycling of solid waste materials in the building materials industry is a necessary part of the green and low-carbon development of the building materials ...
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— Iron ore tailings (IOT), the predominant solid by-products of iron ore mining and refining, present significant environmental challenges due to their sheer volume. This paper endeavors to scrutinize the prospective deployment of IOT as an alternative to soft soil in the fabrication of controlled low strength materials (CLSM) for backfill applications.
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3.1.4 Iron Ore Tailings Tailings are the materials left over, after the process of separating the valuable fraction from the worthless fraction of an ore. Tests on Iron Ore Tailings procured from Kudremukh, Lakya Dam site were conducted. The properties of the IOTs are indicated in table 3.4 Fig 3.2 Iron Ore Tailings
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vated bricks were created with iron ore tailings replacement levels of between 40 and 90%, in increments of ten percent. Results revealed that bricks with 40% iron ore tailings replacement performed better in terms of strength and durability, and that this improvement decreased as iron ore tailings ratio increased.
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— The Role of Chemical Activation in Strengthening Iron Ore Tailings Supplementary Cementitious Materials. by. Zhihang Hu. 1,2,3, Xiaowei Gu. 1,2,3,*, Baojun Cheng. 1,4, Qing Wang. 1,2,3, Jianping Liu. …
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— In this study, the potential of converting iron ore tailings (IOTs) into sustainable building materials was explored. IOTs were combined with fly ash (FA) and ground granulated blast-furnace slag (GGBFS) to prepare IOTs-based supplementary cementitious materials (SCMs). A concrete mix using IOTs-aggregate was also …
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The current trend all over the world is to utilize the treated and untreated industrial by-products as a raw material in concrete, which gives an eco-friendly edge to the concrete preparation process. This practice not only helps in reuse of the waste material but also creates a cleaner and greener environment.This study aims to focus on strength aspects …
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Iron ore tailings (IOTs) are large piles of ground rocks that are discarded during the beneficiation process of iron ore concentra-tion. In rapidly developing countries like …
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— Iron ore tailings (IOTs) are a form of solid waste produced during the beneficiation process of iron ore concentrate. In this paper, iron recovery from IOTs was studied at different points during a process involving pre-concentration followed by direct reduction and magnetic separation. Then, slag-tailing concrete composite admixtures …
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The successful utilization of iron ore tailing (IOT) as fine aggregate would turn this waste material into valuable resources, reduction in the strain on the supply of natural sand, …
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— The limited cementitious activity of steel slag (SS) powder restricts its large-scale utilization as a replacement material for Portland cement and even more so for inert iron ore tailings (IOT). The micro-IOT (MIOT) were utilized as additives to improve the compressive strength and hydration degree of a binary system containing SS and PC.
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— MPa was 20% CGC, 40% iron ore tailings, 25% lime, 10% cement, 5% desulphurization gypsum and 0.06% aluminium powder. From this dry mixture, slurry with 56% water was made (Wang et
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— Gold ore tailings can be used as a siliceous raw material for cement production. • The cement phases are 3CaO·SiO 2, 2CaO·SiO 2, 3CaO·Al 2 O 3, and 4CaO·Al 2 O 3 ·Fe 2 O 3.. The hydration products are portlandite, calcium silicate hydrate, and ettringite. The optimum addition of gold ore tailings in cement production is 5 wt%.
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— Abstract. The need for low-cost raw materials is driven by the fact that iron ore tailings, a prevalent kind of hazardous solid waste, have created major …
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— The three-tailed slag mainly contains SiO 2, CaO, Al 2 O 3, etc., which can be used as Portland cement or concert to provide the required chemical components. And the phase analysis and appearance of the combination adopt gradient grinding technology, which makes it have a good application.. The composite micro-slag is composed of …
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— The advantages of CPB is summarised as following: (1) reclaim water, process reagents, and energy; (2) maximise the density of mine tailings, thus, minimise the footprints of surface tailings ponds; (3) minimise the risk of tailings ponds failure; (4) increase ore recovery rate and decrease ore dilution; (5) increase mining safety, …
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— Iron ore tailings have been widely studied in recent years for blending in cementitious materials, ... Eco-efficient cements: potential economically viable solutions for a low-CO2 cement-based materials industry. Cement Concr Res, 114 (2018), pp. 2-26, 10.1016/j.cemconres.2018.03.015. View PDF View article View in Scopus Google Scholar
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— Iron ore tailings (IOTs) are byproducts of the iron mining industry that have gained significant attention in recent years due to their potential for comprehensive utilization. This study investigates how blending steel slag with IOTs (a siliceous raw material) instead of lime (a calcareous raw material) affects slurry ing properties, …
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— Some possible applications for iron ore tailings (IOT) after the separation step. ... Portland cement additives), ceramic industry, 35,42,63-65. alkali activated materials, 56 and for ...
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— The aim of this research was to investigate the possibility of utilizing iron ore tailings (IOT) to replace clay as alumina-silicate raw material for the production of Portland cement clinker.
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Iron ore tailings are a byproduct of the mining and processing of iron ore, and their potential use as a ... resources as aggregates in the concrete industry causes a serious impact on the environment. The demand for natural ... binder chemically stabilized the tailings. The tailing-cement, tailing-lime, and tailing-slag combinations had 1, 2 ...
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— 1. Introduction. The mineral mining and processing generate numerous tailings after extract valuable minerals and abandon associated minerals [1], [2], [3].Approximately 7–10 tons of tungsten tailings is produced for per ton of tungsten concentrates depending on the tungsten ore grade and dressing level [4], [5].Tungsten …
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ore, the local topography and climate, site geology, seismic risk and cultural context. SETTING THE SCENE Mine tailings management is a long-term process that starts well before any tailings are produced (Figure 2). It can be difficult to estimate the 'typical' cost of building, operating and closing a tailings storage
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— Xiaoyan Huang is supported by a grant from the Chinese Scholarship Council as a visiting scholar at the University of Michigan. The authors would like to acknowledge Lafarge (cement), U.S. Silica (silica sand), W. R. Grace (HRWRA), Kuraray (PVA fiber), and Shouyun (iron ore tailings) for material supplies.
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IOT replaced fine aggregate in 0.32 W/C concrete mixtures from 0 to 50%. The IOT concrete was tested for compres-sive, tensile, and durability. IOT replacement did not …
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— In this study, the potential of converting iron ore tailings (IOTs) into sustainable building materials was explored. IOTs were combined with fly ash (FA) and …
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— Sub-grade chromite ore with Cr 2 O 3 of about 38.5% of Sukinda region of India, can be upgraded to a marketable chrome concentrate of 53–54% Cr 2 O 3 with a …
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— The aim of this review is to re-assess the potential utilization of tailings for cement clinker production and the opportunities and challenges of using tailings as aggregate or supplementary cementitious materials (SCMs) in cement and concrete, so …
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