Test research on hydration process of cement-iron tailings …
Mechanically activated siliceous iron tailings were used as SCMs to prepare concrete, and their compressive strength, impermeability, frost resistance, ... Preparation and characterization of Portland cement clinker from iron ore tailings. Constr. Build. Mater., 197 (2019), pp. 152-156. View in Scopus Google Scholar [20]
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Utilization of Iron Ore Tailings as Raw Material for Portland …
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 …
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Innovative methodology for comprehensive utilization of iron …
However, there is only a little information about iron ore tailings in the production of cementitious materials. On one hand, the iron ore tailings are used as admixture in cement. On the other hand, they are used to produce clinker, but the consumption of iron ore tailings is only about 5% [10], [11]. In this paper, we use the residues after ...
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Harnessing iron tailings as supplementary cementitious …
The increasing demand for sustainable construction materials has led to the exploration of iron tailings (ITs) as supplementary cementitious materials (SCMs) in Limestone Calcined Clay Cement (LC 3).This study investigates the effects of varying ITs content in LC 3 on compressive strength, microstructure, and environmental impact. Replacing 28 % of LC 3 with …
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Mechanical activation as an innovative approach for the preparation …
Although the comprehensive reuse of iron ore tailings has made modest progress, for example, it is used as an additional material in the production of cement and as an aggregate in the production of autoclaved aerated concrete (Ma et al., 2016, Shettima et al., 2016, Zheng et al., 2013), its utilisation rate remains low (Wang et al., 2016).
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The Role of Chemical Activation in Strengthening …
The preparation of iron ore tailings (IOTs) into supplementary cementitious materials (SCMs) is an effective approach to achieve value-added utilization of industrial solid waste.
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Preparation and characterization of Portland cement …
[27] Yan J, Nie S, Liu S and Qiu T 2021 Preparation of Portland cement clinkers by utilizing copper tailings as siliceous material Bulletin of the Chinese Ceramic Society 40 1273–9. Google Scholar [28] Huang Y Y 2017 Study on The Characteristics of C3S Minerals and the Influence of Trace Element Doping in Portland Cement Clinker.
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The Role of Chemical Activation in Strengthening Iron Ore Tailings …
The preparation of iron ore tailings (IOTs) into supplementary cementitious materials (SCMs) is an effective approach to achieve value-added utilization of industrial solid waste. This study systematically investigates the hydration pattern and strength development of Portland cement systems with the incorporation of IOTs, steel slag (SS), granulated blast-furnace slag …
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Preparation and characterization of Portland cement clinker …
We report a type of high-magnesium and low-silicon iron ore tailings (IOT) utilized as a raw material replacing clay to produce cement clinkers by conventional sintering process. …
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Preparation and characterization of Portland cement clinker …
Iron tailings powder (ITP) is a kind of solid waste, which pollutes the environment, without any treatment. The application of ITP in cement concrete is a good choice. In this …
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Utilization of copper tailings in the preparation of low …
Qiu et al. [23] successfully prepared Portland cement clinker via calcination at 1300 °C by replacing clay with CTs and coal gangue. CTs have a certain mineralization effect; their presence (1.5 %–2.5 % content) in raw materials facilitates tricalcium silicate (C 3 S) production and minimizes the f-CaO content in clinker [24].However, the use of CTs as raw …
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Mechanical activation as an innovative approach for the preparation …
DOI: 10.1016/j.mineng.2019.106068 Corpus ID: 208698266; Mechanical activation as an innovative approach for the preparation of pozzolan from iron ore tailings @article{Yao2020MechanicalAA, title={Mechanical activation as an innovative approach for the preparation of pozzolan from iron ore tailings}, author={Geng Yao and Qiang Wang and Yu …
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Performance and hydration mechanisms of ultrafine iron ore tailings …
GBFS serves as the primary raw material in this composition, while gypsum and cement clinker (or cement) function as sulfate and alkaline activators, respectively [6], [7]. In SSC systems, the hydration of a minor portion of Portland cement clinker produces calcium hydroxide (CH), establishing an alkaline environment that promotes GBFS dissolution.
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C-A-S-H Gel and Pore Structure Characteristics of Alkali …
Although the cost of alkali activator accounts for 41.6% of the total material cost, this AACM attains lower materials cost than the reference C30 concrete. It suggests that using iron tailings as aggregates, red mud, blast furnace slag, and a small amount of Portland cement as precursors to prepare AACM has a certain economic potential.
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Field and laboratory study of iron ore tailings–Portland …
Accordingly, the mechanical behaviour of artificially cemented iron ore tailings for dry stacking purposes was evaluated, with a focus on comparing the responses between field …
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Mechanical activation as an innovative approach for the …
If iron ore tailings exhibit pozzolanic activity (a capacity to react with calcium hydroxide to form hydration products), they can be used as solid precursors in cementitious …
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CN104150794A
The invention provides a preparation method for Portland cement with iron tailings. The Portland cement comprises at least the following raw materials in percentage by weight: 60-70% of calcium oxide, 12-20% of silicon oxide, 5-20% of the iron tailings and 3-6% of aluminium oxide. The preparation method comprises the following steps: weighing the raw materials according to the …
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Preparation and properties of Portland cement from …
Secondary recycle waste of rare earth tailing (RET) was used as raw material to prepare Portland cement. The phase composition and microstructure of clinker, mechanical …
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CN104150794B
The invention provides the preparation method of a kind of iron tailings portland cement, comprise the following steps: raw material at least includes following components: calcium oxide, silicon oxide, iron tailings and aluminium oxide, the mass percent of each component is: calcium oxide 60～70%, silicon oxide 12～20%, iron tailings 5～20%, aluminium oxide 3～6%, raw material, …
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Early hydration and mechanical performance of composited …
Faria et al. [36] used iron tailings and fixed the saturated lime coefficient of 0.96 to prepare Portland clinker, when the doping of iron tailings was 32 %, the optimal cement clinker was prepared and the compressive strength reached 71.20 MPa at 28 days to meet the strength requirements of Portland cement. Young et al. [37] used iron ore ...
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Utilization of Iron Ore Tailings as Raw Material for …
These findings suggest that IOT can replace the clay as alumina-silicate raw material for the preparation of Portland cement clinker. 1. Introduction. IOT are the solid wastes generated …
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Hydration kinetics of cement–iron tailing powder composite …
K-D model can simulate cement-iron tailings powder composite binder's hydration. ... of dry powdered nSiO 2, nAl 2 O 3, nCaCO 3, and colloidal nSiO 2 on the hydration kinetics and apparent activation energy of Portland cement. ... In the sample preparation, the hardened paste samples of CT-C-CMs that have reached the specified age are removed ...
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Preparation and characterization of Portland cement …
This work reported a process for the preparation of Portland cement clinker from sulfuric acid leaching residue of coal fly ash. Aluminum and iron in fly ash were effectively leached by sulfuric ...
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Utilization of Iron Ore Tailings as Raw Material for Portland Cement
The cement industry has for some time been seeking alternative raw material for the Portland cement clinker production. 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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Properties of Ultra-High Performance Concrete incorporating iron …
In this research, ordinary Portland cement (P.O 52.5), silica fume (SF) and fly ash were used as cementitious materials. ... Utilization of iron tailings to prepare high surface area mesoporous silica materials. Sci. Total Environ., 736 (2020), Article 139483. View PDF View article View in Scopus Google Scholar [29] S. Zhao, J. Fan, S. Wei.
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Comparative Study of Iron-Tailings-Based Cementitious …
2.1. Raw Materials. Based on the principle of solid waste to maximize utilization of resources, the raw materials selected for this experiment were graphite ore, graphite tailings, fly ash, blast-furnace slag powder (S95), ordinary Portland …
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(PDF) Research progress on the preparation of …
Therefore, according to the characteristics of the tailings, this article has studied on the pozzolanic activity of the tailings when used as cement admixture and the optimal amount of the ...
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Experimental study on the preparation of cementitious …
Studies have shown that iron tailings (IOT) have potential activity and can be used to prepare cementitious materials to replace cement.The purpose of this study was to evaluate the effects of different activation methods, activation time and activator types on the properties of IOT cementitious materials.Different mechanical activation time (0.5 h, 1 h, 1.5 h, 2 h, 2.5 h, 3 h), …
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Stabilization of iron ore tailings with cement and bentonite: …
The abundance of mining activities continuously increases mine wastes/tailings that require storage/disposal. It is well understood that the accumulation of tailings around mines, and consequently, their spreading in the environment could cause serious ecological hazards. Reuse and recycling of mine tailing materials, in construction and earthwork applications (such …
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Preparation and characterization of Portland cement clinker from iron …
We report a type of high-magnesium and low-silicon iron ore tailings (IOT) utilized as a raw material replacing clay to produce cement clinkers by conventional sintering process. Properties of the cement clinkers sintered at 1420 °C with different IOT addition, from 0 to 20 wt%, were investigated. The chemical and mineralogical analysis, and microscopic examination showed …
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