Global warming poses a great threat to the human environment. The construction sector is responsible for around 33% of global carbon emissions (Sandagomika et al., 2024).Cement is one of the most widely used construction materials, which accounts for roughly 5%–8% of global anthropogenic CO 2 emissions, and the carbon reduction in the cement …
Iron tailings is one of the main solid waste produced in the process of iron ore development, and is also an important secondary resource. The common ways of comprehensive recovery and utilization of iron tailings resources at present are described in detail from five aspects: In terms of the recovering valuable elements, the principle of first pre-concentration …
Upstream tailings dams are high-risk structures that have experienced several failures worldwide, particularly with iron ore tailings (IOT). In this study, new disposal …
The demand for cement continues to increase with the growth of the construction industry, which had led to an increase in cost because of the shortage of siliceous materials used for cement production. Gold tailings rich in silica-alumina oxides are good substitutes as raw materials for cement production (Wang et al., 2022). Scholars have ...
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.
A lightweight aggregate (LWA) was manufactured from municipal sewage sludge, gangue, and coal ash. The product performance and environmental safety of the sintered material were evaluated by ...
Raw material used in fiber-cement flat sheets production. For fiber-cement production, Type I CPV-ARI cement (ASTM C150/C150M-20) was used [56], which was chosen for having a lower amount of added materials, such as crystalline silica and no addition of pozzolans, thus avoiding combined mineral effects. Mining waste was used as raw material for ...
Properties and application of thixotropic cement paste backfill with molybdenum tailings. ... Magnetite powder and kaolinite derived from waste iron ore tailings for environmental applications, Powder Technol., № 214, с. 513 ... Assessment of molybdenum mine tailings as filler in cement mortar, J. Build. Eng., № 31 ...
33 Magnetite: Properties, Synthesis, & Application Lee Blaney SYNOPSIS The subsequent report presents scientific data concerning properties of micro- (diameter in 10-6 m meter range) and nano- (diameter in 10-9 m meter range) magnetite, an iron oxide with chemical structure Fe3O4, particles; additionally, the properties of nano-particulate magnetite are
The characteristics of iron minerals in cyanidation tailings with a low iron grade were determined via chemical composition analysis, iron phase analysis, and mineral liberation analysis (MLA). The results showed that the cyanidation tailings contained 15.68% iron, mainly occurring in the form of magnetite (19.66%) and limonite (79.91%), in which 16.52% …
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 aggregate or supplementary cementitious materials (SCMs) in cement and …
the annual production of iron ore tailings reaches about . 180 ... of tailings in cement and concrete, the physical properties ... For this application, tailings with a greater number of .
The application relates to the technical field of tailing treatment, in particular to cement mortar containing vanadium titano-magnetite tailings and a preparation method thereof. The embodiment of the application provides cement mortar containing vanadium titano-magnetite tailings, which comprises the following components: cement, quartz sand and vanadium …
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 chemical properties of tailings. [2]
The results indicate that the MMT can be used as aggregates in concrete for non-wearing surfaces, manufacturing of bricks, low thermal insulation panels, embankment and …
A comprehensive series of compaction and uniaxial compression tests was performed on mixtures of cement/bentonite and tailings. Test results reveal that the …
Reusing mine tailings help protect the environment. Thus, the proper management and application of tailings have turned into a global interest [1], [9]. Portland cement is of one the most widely used binders in building materials. However, its production (especially in the clinker process) has various environmental issues.
The increasing demand for mineral resources has resulted in a rapid increase in the production of tailings [3]. ... gold tailings activated by mechano-chemical-thermal coupling can be used as supplementary cementitious materials for cement, and the practical application needs to be further studied. ... Incorporation of magnetite powder as a ...
In this review, we identify key issues in tailings and cementitious materials, explore mechanisms for tailings component separation and utilization, and examine methods …
Due to its availability, versatility, and eco-friendliness, magnetite is considered one of the most popular types of nanomaterials currently researched [10].Other advantageous features of these magnetic iron oxide nanoparticles include superparamagnetism, high saturation field, blocking temperature, chemical stability, biocompatibility, and low cost [4], [23].
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.
In current study, felsite powder (powdery magnetite mill tailings) was used as filler and Solvay distiller waste (DW) was used as hardening accelerator for ed concrete.
The introduction of 45% diatomite or tripoli significantly reduces the duration of cement grinding, provides the cement slurry with water-cement ratio of 0.9 with better density and flexural ...
During the field application, the ultra-fine tailings and PC32.5 cement were mixed with the cement-tailings ratios of 1:3–1:8, and the slurry concentration of 50 wt% was prepared.
Sampled from a mining enterprise in Liaoning province, China, the tailings present a particle shape as shown in Fig. 1, and the chemical component of the sample is as shown in Table 1, its XRD diffraction pattern as shown in Fig. 2, and its particle size distribution as shown in Fig. 3.As can be seen from Fig. 1, the tailings particles present smooth surface, just …
A technology of vanadium-titanium magnetite and admixtures, which is applied in cement production, etc., which can solve problems such as the preparation method of cement admixtures to be studied, the inability to use cement admixtures, and the lack of pozzolanic activity, etc., to achieve low equipment maintenance costs and reduce processing The effect …
3. Magnesium Oxychloride Cement Application Status 3.1 Magnesium oxychloride cement application status in China Due to the simple and convenient production low cost, magnesium oxychloride cement products have provoked a temporary" ling magnesia heat" in the 1950s.The research on hydration mechanism and microstructure of
In order to make good use of waste iron tailings considering energy conservation and environment protection, a new research on the use of tailings in road base has been carried out in this study. A type of iron tailings stabilized with cement made of appropriate amount of cement was firstly selected as the semi-rigid base material. After the mix proportion design …
The magnesite tailings are waste materials generated during the extraction and beneficiation processes of magnesite [1]. In China, due to the inability to meet production requirements for high-purity magnesia, magnesite ore with a magnesium oxide content lower than 40 % is typically abandoned as tailings, thus becoming magnesite tailings.
Utilization of final tailings concentration of titano-magnetite ores in Portland cement production F L Kapustin1,2 and N N Bashkatov1 1Institute of new materials and technologies, Ural Federal University named after the first President of Russia B N Yeltsin, 19, Mira str., Yekaterinburg, 620002, Russia E-mail: [email protected] Abstract.
An argument is that cement application for tailings stabilization is by itself environmentally unfavorable since cement production has a large carbon footprint (Manjarrez and Zhang 2018). Despite the foregoing rationale, cement's efficiency (reflected by enormous strength gain) and its accessibility in the vicinity of Golgohar mine justify ...
The application relates to the technical field of tailing treatment, in particular to cement mortar containing vanadium titano-magnetite tailings and a preparation method thereof. The embodiment of the application provides cement mortar containing vanadium titano-magnetite tailings, which comprises the following components: cement, quartz sand and vanadium …
These conclusions can guide the application of IOT in concrete sustainable technology. Mechanical activation as an innovative approach for the preparation of pozzolan from iron ore tailings ... (2016) utilized magnetite tailings (MTs) as a substitute for limestone in asphalt mixtures because more than 700 million tons of these wastes are ...
Cemented paste backfilling (CPB) is a mixture of tailings, water and cement that is used as tailings disposal method to minimize geotechnical and environmental risks associated with mine waste ...
This study investigates the application of these technologies in the activation of tailings, assesses their technical potential to activate tailings for use in cement production, elucidates the mechanisms underlying their directional crushing and modification effects, suggests strategies for optimization, and examines the future technical ...
Magnesite Mine Tailings (MMT) collected from Salem magnesite dump site are evaluated for their application as subgrade in road construction. Ordinary Portland Cement (OPC) was added to MMT by 2%, 4%, 6%, 8% and 10% of its dry weight and compaction characteristics, Unconfined Compressive Strength (UCS), Ultrasonic Pulse Velocity (UPV), …
Since the 1990s, various concentrators have completed the recovery of useful minerals and valuable elements from the tailings after ore processing; iron tailings are widely used in paving materials, yellow sand substitutes, cement aggregates, cement production, and wall materials, Filling materials, soil amendments and trace element ...
The utilization of final tailings for concentration of titano-magnetite ores decreases fuel consumption when burning clinker compared to the traditional compositions. …
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 kiln workers in selecting and …
Utilization of final tailings concentration of titano-magnetite ores in Portland cement production, F L Kapustin, N N Bashkatov. Skip to content IOP Science home Accessibility Help. Search all IOPscience ... Final tailings of wet magnetic separation (WMS) are pulled off or dumped into disposal area up to 45mln tons annually causing great ...