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. •
The results showed that the proper addition of iron tailing powder is beneficial to the working performance of concrete and can effectively reduce the timeloss of concrete fluidity. When the content of iron tailings powder in the composite admixture is 50%, the 1080d long age strength of C30 and C50 concrete can reach and MPa.
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.
Flexural behavior evaluation and energy dissipation mechanisms of modified iron tailings powder incorporating cement and fibers subjected to freezethaw cycles. J. Clean. Prod. (2022) ... The use of iron ore tailings obtained from the Germano dam in the production of a sustainable concrete. Journal of Cleaner Production, Volume 278, 2021 ...
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.
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.
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 ...
DOI: / Corpus ID: ; Properties of highvolume iron tailing powder concrete under different curing conditions article{Han2020PropertiesOH, title={Properties of highvolume iron tailing powder concrete under different curing conditions}, author={Fanghui Han and Ao Luo and Juanhong Liu and Zengqi Zhang}, journal={Construction and Building Materials}, year ...
Abstract. Iron ore tailing—a waste material of mineral beneficiation plants, is used as a source of iron for synthesizing magnetite powder. Iron ore tailings containing % Fe 2 O 3, % SiO 2 and % Al 2 O 3 have been subjected to HCl digestion on a hot plate to extract the entire amount of Fe 2 O 3 as FeCl 3.
The development of iron and steel industry requires the exploitation of a large number of iron ore resources. While producing iron concentrate powder on demand, a large number of eliminated tailings will be produced [1, 2].According to statistics, tons of tailings will be produced for each ton of iron concentrate powder screened on average.
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% ...
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.
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 ...
The cementstabilized iron ore tailings may be incorporated in road constructions as they easily fulfill strength requirements of base and subbase course layers, while the bentonitetreated tailings are applicable as cover materials in layered disposal of tailings. Introduction
True Iron Ore Frostfire Ridge. Frostfire Ridge is my favorite place to farm True Iron Ore because it's a lowlevel zone and you can mine most ore without having to kill any mobs. Talador. Talador is also really good, but it's a higher level zone, so lower level players should stick to Shadowmoon or Frostfire.
Abstract India is well enriched with abundant resources of magnetite and hematite iron ore. Mining activities are tremendously increasing to cater the demand of market, which in turn is responsible for huge generation of mining waste.
(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.
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 ...
Small iron tailing powder particles are beneficial to the properties of precast concrete, but large iron tailing powder particles weakly bond with surrounding hydrates. ... Innovative methodology for comprehensive utilization of iron ore tailings part 2: the residues after iron recovery from iron ore tailings to prepare cementitious material. J ...
High‑silicon iron ore tailings (IOTs) as mineral solid wastes derived from the processing and utilization of iron ore, which would threaten human health and the ecological environment if handled improperly. Coincidently, it consists of abundant quartz gangue. In this study, we proposed a superconducting high gradient magnetic separation (SHGMS) coupling with acid leaching technology to ...
Iron ore tailings (IOTs) are the industrious 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.
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.
The cementitious activity of iron tailings powder (ITP) as a concrete admixture is investigated and optimized in this study. When the specific surface area (SSA) of ITP is in the range of 450 550 m 2 /kg, the activity is larger than that of fly ash, and when SSA is 469 m 2 /kg, the activity reaches its largest value of %. The content of ITP should not exceed 30%.
The two iron ore tailings (ST = sandy tailing, MT = mud tailing), with different iron content (wt.%) were initially dried at 120 ºC for 24 h. The iron tailings were direct reduced by heating 500 mg at 10 ºC min 1 up to 500 ºC in a tubular furnace and holding for 3 h with pure H 2 (50 mL min 1, Air Products, Mogi das CruzesSP, Brazil).
Natural or modified iron ore tailings in a CH 4 reducing atmosphere at 600 °C or impregnated with residues of polyethylene terephthalate (PET) powder (from bottle recycling) and treated under an inert atmosphere of N 2 at 600 °C were used as heterogeneous catalysts for the Fenton reaction.
When compared to reference concrete, the TS shown by the concrete with iron ore tailings aggregate improved by % with age . However, because of the greater fines content, the concrete with iron ore tailings aggregate would need more water to mix, which weakens the link between the aggregate and cement paste, and lowers the TS .
It has been reported that iron tailing powder (ITP) has the potential to partially replace cement to prepare ultrahighperformance concrete (UHPC). However, the reactivity of ITP particles in concrete largely depends on the curing method. This study investigates the effects of curing conditions on the mechanical and microstructural properties of UHPC containing ITP. To achieve this objective ...
Powder Technology Volume 361, 1 February 2020, Pages 571580 A new approach for recovering iron from iron ore tailings using suspension magnetization roasting: A pilotscale study Yongsheng Sun a b, Xiaolong Zhang a b c, Yuexin Han a b, Yanjun Li a b Add to Mendeley https://// Get rights and content •
composite sintered bricks produced from shale, sewage sludge, coal gangue powder and iron ore tailings. Construction and Building Materials, 232(1 3), 117250. DOI / ...
Introduction Iron ore tailing (IOT) is an industrial solid waste produced after beneficiation process of iron ores. It is a kind of fast accumulated waste due to the increasing demand for iron, steel and the relevant industries worldwide [1].
The world produced an estimated billion tonnes of iron ore during 2015 (Footnote 1 US Geological Survey, Mineral Commodity Summaries, January 2016).The fact that generation of tailing is about 1015% of ore [] indicates that more than billion tonnes of tailings are generated annually leading to increasing amount of are known for leaching toxic substances ...
The two main methods of recycling iron from iron ore tailings are magnetizing roasting and direct reduction. Magnetizing roasting uses temperatures between 700 and 900 °C ... the point where the crystallized magnetite and quartz are fine enough that the quartz is left behind when the resultant powder is passed under a magnetic separator.
References (62) Figures (10) Abstract and Figures Currently, approximately billion tons per year of iron ore tailing wastes (IOT) are generated, mainly in Australia, Brazil, and China....
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