Historically, safe containment has been the main goal of tailings management. Disposal has taken place in sizable surface impoundments that are enclosed by dams or embankments, as well as in subterranean workings and unnatural depressions [10], [11].However, the environment and communities are seriously endangered by the …
DOI: 10.1016/j.conbuildmat.2023.131095 Corpus ID: 257722943; Application of leached iron ore tailings to produce sustainable cements @article{Almeida2023ApplicationOL, title={Application of leached iron ore tailings to produce sustainable cements}, author={V{'i}tor Otac{'i}lio de Almeida and Laura …
Rapid economic development and increased demand for mineral products in China have led to extensive extraction of various ores, resulting in significant environmental challenges associated with the generation of industrial solid waste, particularly iron tailings. Despite being a major mining nation, China faces issues of wasteful practices, with …
The results showed that the clinker phases were C 3 S, C 2 S, C 3 A, and C 4 AF, and the cement hydration products were claviform ettringite, granular C-S-H gels, and flaky Ca(OH) 2. In addition, the maximum amount of IOTs added for a 52.5 grade cement production was 6 wt.%.
A comprehensive series of compaction and uniaxial compression tests was performed on mixtures of cement/bentonite and tailings. Test results reveal that the …
Typical mixtures have a solid content of 70–80 wt% (30–20 wt% of water), of which 3–10 wt% is Portland cement (97–90 wt% of tailings). An extensive amount of recent scientific literature aims for a higher added value valorization of tailings in applications offsite from the mine (Edraki et al., 2014; Park et al., 2019). The two main ...
The present study demonstrated a feasible approach of utilizing waste iron ore tailings in synthesis of value added products for environmental applications. The ferric iron recovered from waste iron ore tailings via acid leaching followed by precipitation as ferric (hydr)oxide was used as feed stock to synthesis magnetite powder by its …
1. Introduction. A large amount of tailings will be produced during the exploitation and utilization of mineral resources [1], and the increase in tailings output will endanger economic progress and resource protection.It is the key for solving the problem to develop its resource attributes and rational application based on the physical and …
cement. Granite mine tailings stabilized with cement were evaluated as pavement subbase materials by Qian et al. (2011). Bastos et al. (2016) investigated iron ore tailings sta-bilized with cement, lime, and steelmaking slag and conclud-ed that the unconfined compression strength (UCS) of 5% cement mixture complied with strength requirements …
The results showed that the strength and strength-to-density ratio of ed concrete in cement-felsite powder system is much higher than those in cement-sand system and cement-lime-sand system.
Therefore, the application of tailings in cement-based materials can reduce the problems of resource shortage and environmental pollution, as well as the …
Semantic Scholar extracted view of "Amending ed lightweight soil with tailings sand for embankment applications: Physical properties, durability, and microstructure" by Y. Que et al. ... Rheology control of self-consolidating cement-tailings grout for the feasible use in coal gangue-filled backfill. ... Initiating pedogenesis of magnetite ...
Tests show that with an increase in substitution rate of cement in the tailings, the compressive strength of concrete tends to decrease, and when the substitution rate is at 10%, 20% and 30% ...
The invention belongs to the technical field of comprehensive utilization of mineral resources, and particularly relates to a cement admixture containing vanadium titano-magnetite tailings, a preparation method and application thereof, wherein the cement admixture comprises the following components: vanadium titano-magnetite tailings, …
Focuses on the application of mechanical, thermal, chemical and coupled activation technologies in tailings processing. Elucidating how activation technology can …
IOTs stabilization using Portland cement is confirmed for enhancing the mechanical properties of the materials [29], [34], [35], immobilizing heavy metals [36], and …
Iron ore tailing is a major solid waste requiring advanced recycling methods because ore tailing powder is polluting air and water resources. For instance, about 300 million tons of tailings are disposed yearly in 1229 iron ore tailings dams in the Hebei province in China. Iron ore tailings can be recycled as functional materials because these tailings are …
With the rapid development of ferrous metallurgy, the production of iron tailings as waste after beneficiation is increasing. Due to the shortage of natural stone in road construction, iron ...
Current magnetite production is a by-product of the copper operations and as such is recovered from the Concentrator floatation tails stream by magnetic separation. Approximately 15%, by weight, of magnetite is removed by 'cleaning' and 're-cleaning' of the magnetic concentrate from the first stage.
The burgeoning accumulation of vanadium-titanium magnetite tailings (VTMT) presents a dual challenge of environmental hazard and loss of valuable metal resources. This review arrives at a crucial juncture in global efforts towards a circular economy, focusing on innovative and effective metal recovery technologies. We explore …
Gold ore tailings can be used as a siliceous raw material for cement production. • The cement phases are 3CaO·SiO 2, 2CaO·SiO 2, 3CaO·Al 2 O 3, and 4CaO·Al 2 O 3 ·Fe 2 O 3.. The hydration products are …
The aim of this review is to re-assess the potential utilization of tailings for cement clinker production and the opportunities and challenges of using tailings as …
This work explored the use of spodumene flotation tailings (SFT) as an aggregate used in cement mortar to mitigate their environmental impact. The principal phase compositions of SFT were quartz (Qtz), feldspar (Fsp) and muscovite (Ms). So, the effects of variations in the particle size of Qtz, and mineral additives, Ms and Fsp, on the …
2.1 Preparation of Materials. The iron ore tailings used in the study were sourced from tailing dam (Fig. 2b) of beneficiation plant at Barbil iron ore mine of Odisha state, India. Processed clay was procured from a local established fired clay brick manufacturing company, particularly to take advantage of the traditional knowledge of …
The physical and chemical properties of tailings used as fine aggregate in concrete directly affect the mechanical properties of concrete. The most important of …
It can also be used to produce cement mortar coating and noise reduction plate filler; In terms of making filling materials, iron tailings are applied to the pavement base, subbase and subgrade filling layer …
Therefore, there is an urgent need to develop cost-effective tailings utilization technologies. The iron tailings are often used to make ceramsite, cement and other building materials (Chinnappa and Karra, 2020; Li et al., 2020 b). These utilization technologies could alleviate the problem of solid waste accumulation.
Magnetite is the most common and utilized form of naturally occurring iron oxides, with the chemical formula Fe 3 O 4 [32].It is characterized by a crystalline cubic inverse spinel structure, in which ferrous ions occupy half of the octahedral lattice sites and ferric ions occupy the other half of the octahedral lattice sites and all the tetrahedral …
concrete made from abandoned iron ore tailings in Iraq, and the findings showed that it performed better than regular concrete and displayed greater compressive strength and …
At present, researchers worldwide have conducted many studies on the utilization of tailings in asphalt mixture. Wang et al. (2016) investigated the application of magnetite tailings in asphalt mix. The findings suggested that the substitution of magnetite tailings for limestone aggregates improved asphalt mix's resistance to rutting.
Gold ore tailings can be used as a siliceous raw material for cement production. • The cement phases are 3CaO·SiO 2, 2CaO·SiO 2, 3CaO·Al 2 O 3, and 4CaO·Al 2 O 3 ·Fe 2 O 3. • The hydration products are portlandite, calcium silicate hydrate, and ettringite. • The optimum addition of gold ore tailings in cement production is 5 wt ...
This study explores the use of Magnesite Mine Tailings (MMT) as an admixture in cement stabilization of Expansive Soil (ES) to improve subgrade performance and reduce environmental impact. ... the amount of water required for the attainment of …
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 15.98% Fe 2 O 3, 83.36% SiO 2 and 0.44% 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.A portion of extracted FeCl 3 …
The application of biochar in water treatment can reduce the burden on market for the production and application of expensive adsorbents and hence, the agro-waste-based green adsorbent (biochar ...