In this study, iron ore tailings (IOTs) are used as aggregates to prepare ironoretailingengineered cementitious composites (IOTECCs) to achieve clean production. Some mechanical indexes, such as compressive strength (fcu), fourpoint flexural strength (ff), axial compressive strength (fc), deformation properties, flexural toughness, and stressstrain behavior, are studied.
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Semantic Scholar extracted view of "Preparation of UHPC with cement replaced by richsilicon iron ore tailing powder" by Lini Yang. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 215,130,968 papers from all fields of science. Search ...
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The main chemical component of highsilicon iron tailings (HSITs) is SiO2; HSITs also include some oxides such as Al2O3 and CaO. Mechanical activation can reduce the particle size of HSITs and enhance their pozzolanic activity such that they can be used as a type of mineral admixture for cementbased materials (CBMs). This study aims to investigate the mechanical activation (ultrafine grinding ...
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Iron ore tailings not only cover huge land and pollute environment, but also give rise to security risks. In November 2007, 13 people died in the accident caused by iron ore tailings dambreak in Anshan of Liaoning province, China. ... High titanium heavy slag powder (HSP) is a typical waste with vast reserves but lacks effective disposal. ...
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Particularly, iron ore tailings (IOT) as ordinary industrial solid waste in China is discharged and deposited. ... and YB/T [28], there are three types of IOT: iron tailings powder, iron tailings super fine sand, iron tailings fine sand. However, in most previous researches, IOT mainly covers three categories: (i) iron tailings rock ...
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Sakthivel et al in their work prepared magnetite powder using iron ore tailing. A fraction of the extracted FeCl 3 solution was changed into FeCl 2 via metallic iron formation using NaBH 4 as a reducing reagent. The magnetite particles synthesized in different ways showed varying degrees of magnetization behavior, credited to the change in ...
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To investigate the application of iron tailings in cementbased materials as fine aggregate and mineral admixture, six iron tailings sands were selected from different places of origin, and the methods of acid and alkali activation were adopted to increase the activity of tailings powder. The strength of mortar was evaluated and the composition and microstructure were analyzed to explore the ...
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Iron ore tailings (IOT) are discharged as waste after the beneficiation process to concentrate iron ore, which has triggered a series of environmental problems. ... [23] found that IOT powder decreased the compressive strength but that the strength was similar to that of plain cement paste with increasing curing age. Han et al. ...
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For example, the content of SiO 2 in phosphate tailings is, in contrast to the in iron ore tailings. Even if there were all leadzinc tailings or iron ore tailings, the variation content of SiO 2 is in the leadzinc tailings or in the iron ore tailings. As a result, if tailings are only classified according to ...
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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. ... Aluminum powder is the most commonly used ing agent in the production of AAC, and lime hydration provides the necessary alkaline environment for the ing ...
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composite sintered bricks produced from shale, sewage sludge, coal gangue powder and iron ore tailings. Construction and Building Materials, 232(1 3), 117250. DOI / ...
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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 preconcentration followed by direct reduction and magnetic separation.
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Materials. The ironore tailings used in the test were obtained from the Lizhu irontailing plant in Shaoxing, China, as shown in Figure liquid limit and plasticity index of the ironore tailing were % and, respectively, and the main compounds are shown in Table cement used in the test was produced by Shaoxing Zhaoshan Building Materials Co., Ltd. in ...
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Iron ore tailings (IOTs) are the indusus solid waste discharged by concentrating mills after processing iron ores and selecting "valuable components" ( Yao et al., 2020 ). In China, 600 million tons of IOTs are discharged every year and the IOTs deposition has reached 5 billion tons.
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Douglas B. Mazzinghy Add to Mendeley https://// Get rights and content Highlights • Mining tailings can be used in the production of an alternative sodium silicate. • Ecofriendly and lowcost activators can be produced from SiO 2 rich waste materials. •
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Abstract. Iron ore tailing (IOT) is the wastes generated during the salutariness process of iron ore concentration. These wastes are abundant in quantity, which can be utilized in many ways. In this manuscript, utilization potential of IOT as a resource and its adaptation in the replacement of different industrial raw materials have been discussed.
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Natural sand and iron ore tailings were used as aggregates. The natural sand was originally excavated from the lower reaches of Yangtze River and had an apparent density of g/cm tailings were obtained from the local iron and steel industry and had an apparent density of g/cm chemical composition of the tailings is shown in Table 1.
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Iron tailing powder (ITP) is considered to have the potential to replace cement to manufacture ultrahighperformance concrete (UHPC). However, the performance of UHPC with the addition of ITP after exposure to high temperatures is more complex.
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(ii) iron tailings sand, used as fine aggregate, particle size ranging from mm to mm, is produced by grinding and filtrating of iron mineral [29] (iii) iron tailing powder as concrete mineral admixture, of particle size < mm. With the development of iron ore beneficiation, the size of IOT particle is getting smaller and smaller.
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The article conducts a study on the iron tailings sand concrete's fracture behaviour based on the doubleK criterion. Five sets of standard threepoint bending beam specimens of concrete with 0% ...
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The limited cementitious activity of steel slag (SS) powder restricts its largescale utilization as a replacement material for Portland cement and even more so for inert iron ore tailings (IOT). The microIOT (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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Iron ore tailings (IOTs) are solid wastes after beneficiation [1], accounting for nearly 1/3 of the total tailings [2]. It is reported that the recycling utilization rate of IOTs is only 7% [3]. ... Experimental investigations on the mechanical behavior of iron tailings powder with compound admixture of cement and nanoclay. Construction and ...
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Iron ore tailings have been widely studied in recent years for blending in cementitious materials, ... Experimental investigations on the mechanical behavior of iron tailings powder with compound admixture of cement and nanoclay. Construct Build Mater, 254 (2020), /
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Abstract This paper reports the results of an initial attempt of using iron ore tailings (IOTs) to develop greener engineered cementitious composites (ECCs). ECC is a unique class of highperformance fiberreinforced cementitious composites featuring high tensile ductility and durability.
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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