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 ...
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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.
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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 …
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The utilization of final tailings for concentration of titano-magnetite ores decreases fuel consumption when burning clinker compared to the traditional compositions. …
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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 …
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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 ...
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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 ...
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For iron tailings, existing researches is mainly in the field of cement-based materials, such as ultra-high performance concrete, dam concrete, engineered cementitious composites, Portland cement clinker, and so forth (Huang et al., 2013; Lv et al., 2019; Protasio et al., 2021; Young and Yang, 2019; Zhang et al., 2020). However, the application ...
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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 ...
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China generates 1.5 tons of iron ore tailings for each ton of iron ore concentrate.21,22 In this country, the annual production of iron ore tailings reaches about 180 million tons and is increasing.23 In India, between 10-12 million tons of iron ore tailings are extracted in the form of ultrafine waste.24 In Australia, it is estimated that ...
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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 …
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The magnetite particles have both high crystallinity degree and significant aggregation behavior, caused probably by the high gradient effect between fine magnetite particles [8]. Nevertheless ...
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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.
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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 ...
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Due to the high prices, the popularity of radiation shielding concrete (RSC) has been greatly limited. To solve this, this research reused the lead–zinc tailings (LZT) as a fine aggregate replacement ranging from 0% to 60% for the RSC. The results revealed that the RSC containing 30% LZT presented better workability and achieved 95.84% of the compressive …
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The utilization of final tailings for concentration of titano-magnetite ores decreases fuel consumption when burning clinker compared to the traditional compositions.
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Tailings, the solid waste residues remaining after the extraction of valuable minerals from ores, are somewhat toxic to the environment and pose health risks [[6], [7], [8]].With the escalating demand for minerals and metals, the global production of tailings has surged to approximately 13 billion tonnes annually [9, 10], challenging the sustainable development of the mining industry.
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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
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Tailings are solid waste materials produced during the process of ore mining. The disposal of tailings is a major environmental issue that arises from the process of mineral exploration [1], [2].The increasing demand for mineral resources has resulted in a rapid increase in the production of tailings [3].However, the processing speed of tailings is far lower than …
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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.
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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 …
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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 ...
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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.
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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 …
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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.
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The use of soil tuff, an industrial solid waste, for the modification of lead–zinc tailings as subgrade fillers presents a sustainable solution for concurrently addressing the …
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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 …
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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 …
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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 ...
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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% …
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