In order to study the feasibility and sand substitution mechanism of cement mortar mixed with iron ore tailings (IOT), iron ore tailings cement mortars (referred to as IOTC) with IOT content of 0%, 25%, and 50% were made and tested. First, the basic properties of IOT used were measured to verify the theoretical feasibility. Second, the …
In the cement, mortar, and concrete industry, mineral admixtures, such as silica fume, ground granulated blast furnace slag and fly ash, have commonly been employed to enhance the physical and mechanical properties of cement mortar and concrete [14], [15].Fly ash constitutes 80% of the total residue resulting from the …
Effective electromagnetic interference shielding has become a focal point of concern for special construction and buildings. In this study, a novel cement-based electromagnetic shielding composite material was developed by the incorporation of both nickel-iron alloy powder (NF) and the partial replacement of the fine sand portion of ISO standard sand …
Experimental and statistical evaluations of strength properties of concrete with iron ore tailings as fine aggregate. J. Hazard. Toxic Radioact.Waste, 24 (1) (2020), 10.1061/(ASCE)HZ.2153-5515. ... Preparation and Mechanical Properties of High Volume Iron Tailings Sand Concrete. Shenyang University of Technology, Shenyang (2019) …
Mechanical properties of concrete samples with different mixing amounts of iron ore tailings were tested in accordance with the national standard GB/T 50081-2002. As shown in Figure 4, standard compressive concrete cube specimens (150 × 150 × 150 mm 3 ) were fabricated according to different amount of iron ore tailings.
Correspondingly, properties of outgoing products are of importance. Degradation of Direct Reduced Iron (DRI) feedstock greatly influences storage, handling, risk of reoxidation, and following melting operations. The focus of this work has been on the physical properties of DRI, and their effect on mechanical properties.
This work aims to evaluate the influence of the incorporation of iron ore tailings (IOTs) on the mechanical, thermal, and morphological properties of polypropylene, IOT, and maleic anhydride grafted polypropylene (MAPP) composites. IOTs come in the form of coarse particulates (sand) and fine particulates (iron sludge). Composites were …
Thus, the performance of ITZ plays an important role in the mechanical properties of concrete [7, 8]. In order to improve the mechanical performance, we add iron ore tailings (IOTs) to RAC. IOTs are the waste residue after separating the iron concentrate, which are one of the major industrial wastes [9].
The world reserves of iron ore are around 170 billion tons. More than 2.4 billion tons of iron ore were processed in 2019, in which 36.7% correspond to the world's largest producer, Australia ...
The flow-related mechanical properties of dusts from the de-dusting systems of several sinter plants were investigated. The mass median diameters of the dusts were in the range from approximately 3 to 100 µm. ... Mechanical properties of dust collected by dust separators in iron ore sinter plants Environ Technol. 2015;36(24):3186-93. doi: 10. ...
Macro-synthetic fiber-reinforced iron ore tailings (IOT) concrete is an environment-friendly building material featured by recycling IOT and improving performance of IOT concrete due to fiber incorporation. In this study, the mechanical properties of macro-synthetic fiber-reinforced concrete incorporating IOT were investigated.
Iron ore tailings (IOTs) was the residual solid waste that remained after the extraction of iron from iron ore [1, 2], which was typically deposited in tailings ponds.Leakage or spillage from the tailings pond can result in the release of harmful substances into the surrounding soil, groundwater, and rivers, causing contamination of …
This work aims to explore the mechanical properties of iron ore sinter experimentally and numerically based on the pilot-scale pot tests and high resolution X-ray computed tomography. The influence of coke rate addition levels on the sinter strength was investigated in terms of the macro fracture and micro stress distribution. In addition, the ...
Quantitative and qualitative metallography has been applied within the extruded product to match with the values of the mechanical properties. The product achieves maximum density of 7.55 gm/cc after extrusion with 240 MPa extrusion pressure at 1200 °C. ... Simultaneously iron ore fines in the fraction are also produced during …
obtain valuable elements from iron-ore. 79. 80. 2. Materials and methods . 81. ... An investigations have been made into the microstructure and mechanical …
Investigating mechanical properties of hot mix asphalt containing iron ore flotation tailing ... Iron ore tailings (IOT) are a form of solid waste produced during the beneficiation process of iron ore concentrate. Among all kinds of mining solid waste, IOTs are one of the most common solid wastes in the world due to their high output ...
Through the 3D reconstruction of two types of iron ore sinters, the morphology and distribution of minerals in three-dimensional space were analyzed, and the volume fraction of minerals in a 3D image was calculated based on their pixel points. In addition, the microhardness of minerals was measured with a Vickers hardness tester.
Abstract. The goal of this experimental study is to produce fly ash (FA)-based coarse aggregates by adding iron ore tailings (IOT) to the FA-based precursor as an additional mix component. The involvement of different types of binders—influential factors of both pelletization and geopolymerization that govern the production of FA-based …
This chapter presents the mineralogical, chemical compositional, and physical characteristics of the main types of iron ore deposits mined from around the world. It …
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 CO2 and increase in the consumption of river sand for construction activities making the river beds over …
A detailed characterization of the ore becomes impor-tant during ore processing because the rate and standard of the metals produced are afected by …
Macro-synthetic fiber-reinforced iron ore tailings (IOT) concrete is an environment-friendly building material featured by recycling IOT and improving …
To fully develop iron ore tailings and construction wastes, the prediction model of mechanical properties of iron ore tailings recycled concrete and its influence weights of the three factors are clearly defined in the foundation treatment project. This article also takes control factors for the compressive strength of iron ore tailings ...
The consumption of ore has been significant, and the corresponding solid waste produced has become a bottleneck for the development of China's mining …
"Séetec". The filler is iron ore tailings in particle form and approximately irregular in shape with particle sizes 150, 212 and 300 µm from iron ore beneficiation plant in Itakpe, Kogi State in the Middle belt region of Nigeria. 3.2. Iron Ore Tailings Preparation . The iron ore tailings was dried at room temperature 30˚C
Thereby, the exploration of the mechanical properties and durability indicators of cementitious composites with high additions of IOT will contribute to know the effects of the residue in this application. ... Experimental study on the properties of concrete mixed with iron ore tailings. Adv Mater Sci Eng (2016), p. 8606505, …
3.2. Iron Ore Tailings Preparation The iron ore tailings was dried at room temperature 30˚C ± 2˚C and 50% ± 5% relative humidity for a minimum of 40 hours prior to testing [13,14]. The different particle sizes were …
Section snippets Raw materials. The IOTs used in the study were obtained from an iron ore plant (Zhashui Mineral Co. Ltd. in Shanxi, China). Bentonite and bauxite were purchased from commercial corporation (Xinding Mineral Co. Ltd. in Xinyang of Henan, China).. The chemical composition of the raw materials was measured by X-ray …
The global iron-producing industries are trying to use the high alumina content iron ores due to the exiguity of high-grade ores and economic reasons. For this …
The mechanical properties of concrete with a tailing content of less than 50% are enhanced or comparable to those of the control specimen, as shown in Fig. 5, Fig. 6, Fig. 7. However, beyond a IOTs replacement ratio of 50%, the mechanical properties of the modified concretes are lower than those of the control specimen and show a …
Iron ore tailings (IOT) are a type of mining solid waste and cause many environmental and safety problems. The aim of this paper was to investigate the effect of high-volume ultra-fine IOT on the mechanical properties and hydration mechanism of cementitious materials.
A new iron ore tailing is applied to develop conductive cement composite materials. • The addition of iron ore tailing can improve the mechanical properties and conductivity. • Nuclear magnetic resonance to analyze the pore distribution is adopted. • Digital image correlation to evaluate the stress sensing ability and strain field ...
1. Introduction. The rapid development of the steel industry produces numerous industrial by-products, especially iron ore tailings (IOTs) [1].It was reported that China's IOTs production reached 475 million tons in 2018 [2].A Brazilian mining company produced 625.9 million tons of sterilized residue and tailings in 2019 [3].Meanwhile, the …
