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 .
The iron ore tailing sample was a granular highsilicon solid waste obtained after the beneficiation process of iron ore following the steps of stage grindinggravity separationmagnetic separationanion reverse flotation. The sample had a size distribution ranging from to µm. ... Powder Technol., 379 (2021), pp. 466477 ...
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% ...
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.
1 Introduction. Iron Ore Tailings (IOTs) refer to the solid waste associated with the process of iron concentrate extraction from iron ore and are an important source of environmental pollution [1,2].Approximately 5 billion tons of IOTs are currently present in China, and more than 600 million tons are produced every year.
Onitiri and Akinlabi 4 used 20% by volume of iron ore tailings as maximum amount in the investigated composites. ... A. Mechanical properties of iron powder filled high density polyethylene ...
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 ...
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), /
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 ...
This effect is more significant under the condition of low water binder ratio and slag powder, and increases with the increase of age. For example, when the water binder ratio is and the ratio of ITP to slag powder is 5:5, the 1080d strength of iron tailings powder concrete is MPa higher than that of LP concrete. (2) According
The use of iron ore tailings (IOT) is a trend for the future of mining. The adoption of alternatives that minimise the disposal of natural resources and add value to production processes strongly supports this effort. ... The addition of iron tailing powder (ITP) reduces the reaction rate and gross heat release of hydration of cementitious ...
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
(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.
The influences of iron tailing powder (ITP) ... However, to recycle more iron from ore and tailings, the ultrafine grinding used in the beneficiation process today induces the particle size of iron tailings to finer and finer [25], which implies a potential for filler replacement in asphalt mixtures. Only a few researchers have explored this field.
A new approach for recovering iron from iron ore tailings using suspension magnetization roasting: A pilotscale study. Powder Technol. (2020) ... the hematite within iron ore powder was almost entirely transformed into magnetite at a reduction temperature of 520 °C using a gas combination of 45 % H 2 15 % CO 40 % N 2, which significantly ...
1. Introduction. The continuous development of mineral resources forms many tailings, which is one of the rich solid waste resources. The accumulation of tailings pollutes the environment and poses a threat to the safety of surrounding people and buildings [1,2].Iron tailings (IOTs) account for the most significant proportion of the total tailings' generation in China: about 520 million tons ...
Iron ore tailings can be classified as high silicon, high aluminum, high calcium and magnesium, low silica and polymetallic type. And the highsilica iron ore tailings are widely distributed in China with large reserves. ... Earlyage hydration characteristics of composite binder containing iron tailing powder. Powder Technol. (2017) J. Liu et ...
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.
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.
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 ...
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.
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 ...
The concrete with 10% glass powder 30% iron ore tailings showed a higher strength compared to the conventional mix for 28 days. Concrete mix containing 10% GP and 30% IOT showed higher flexural ...
composite sintered bricks produced from shale, sewage sludge, coal gangue powder and iron ore tailings. Construction and Building Materials, 232(1 3), 117250. DOI / ...
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 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.
The iron ore tailings aggregates concrete exhibited a good mechanical strength and even in the case of compressive strength, there was an improvement of % over conventional aggregates concrete. The indirect tensile strength did not improve against the control mix due high content of fines in the tailings aggregates but showed % ...
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 ...
© DZCrusher - كل الحقوق محفوظة
