enrichment tailings in a ceramic body should not exceed 20% at nepheline content 10 – 30%. The largest reduction of water absorption was observed in the ceramic bodies Nos. 3 Use of Iron-Ore Enrichment Tailings in the Production of Ceramic Articles 23 TABLE 1. Chemical Composition of the Raw Material Raw material Content by weight, % SiO 2 Al ...

 — The results are shown in Table 2. It can be seen that the iron tailings and clay were mainly composed of SiO 2 and Al 2 O 3, and the content of Fe 2 O 3 in the …

 — In order to comprehensively utilize iron ore tailings (IOTs), the possibility of using IOTs as raw materials for the preparation of cementitious composites (IOTCCs) was investigated, and IOTCC was …

 — Mining is an important industry, accounting for 6.9% of global GDP. However, global development promotes accelerated demand, resulting in the accumulation of hazardous waste in land, sea, and air environments. It reached 7 billion tonnes of mine tailings generated yearly worldwide, and 19 billion solid tailings will be accumulated by …

 — Ecological engineering of soil formation in tailings is an emerging technology toward sustainable rehabilitation of iron (Fe) ore tailings landscapes worldwide, which requires the formation of well-organized and stable soil aggregates in finely textured tailings. Here, we demonstrate an approach using microbial and rhizosphere processes to ...

 — Echeverri evaluated the use of iron ore tailings from the Monjolo pile in the Quadrilátero Ferrífero as a filter in land works, mainly for dams, replacing the natural sand found in the rivers and dunes. The author found that the properties of resistance and durability of this waste can be considered as a good material to be used in filters of ...

 — Mine tailings, the byproduct of mining and mineral processing, are increasingly mass produced as a result of increased demand for metals and minerals as well as the advancement in technology that allows for the exploitation of lower-grade ores. Lower grades can increase the volume of tailings that may contain new gangue minerals …

 — Iron tailings is the most common and largest mining waste, and given the serious social, economic, and environmental impacts caused by tailings, green and safe technologies are urgently needed for ...

 — In order to deal with the problems of resource waste and environmental pollution caused by solid waste, iron tailings (mainly SiO2, Al2O3 and Fe2O3) were used as the main raw material to create a type …

DOI: 10.1016/j.conbuildmat.2020.118108 Corpus ID: 213558392; Properties of high-volume iron tailing powder concrete under different curing conditions @article{Han2020PropertiesOH, title={Properties of high-volume iron tailing powder concrete under different curing conditions}, author={Fanghui Han and Ao Luo and …

DOI: 10.1016/j.aej.2024.03.067 Corpus ID: 268784988; Preparation and application of soil conditioner using iron ore tailings-biochar composite material @article{Hou2024PreparationAA, title={Preparation and application of soil conditioner using iron ore tailings-biochar composite material}, author={Xiaojie Hou and Yanle Zhang and …

Dolomite rock powder (the waste stone residue in the production of machine-made sand and stone processing) and iron tailings powder formed by mineral processing industry are solid wastes, which occupy land resources, pollute the environment and release toxic substances without reasonable processing. The dolomite rock powder and iron tailings …

 — The main gangue species was fluorite with small amounts of dolomite and amphibole. Due to the weak magnetism of hematite and rare earth minerals, magnetic separation has low efficiency. However, magnetization roasting-magnetic separation is an effective method to recover hematite. ... 16 copper slag, 17 iron tailings, 18 vanadium …

 — The dolomite rock powder and iron tailings powder composing a large number of active substances could be advantageous to the cement-based materials. In this study, the electrical resistivity of ...

 — 2.1. Geology and Study Area. As shown in Figure Figure1 1, the Yeshan iron tailings pond is located 40 km north of the Nanjing region of Jiangsu Province, China.The Nanjing region has a subtropical monsoon climate with four distinct seasons. The average temperatures in January and July were 2.2 and 28.6 °C, respectively. 23 The tailings …

 — The possibility of using iron-ore enrichment tailings in the production of ceramic articles is investigated. The compositions and properties of ceramic bodies and the process parameters for manufacturing articles are presented. To increase product quality nepheline concentrate is used as an alkali-containing additive.

 — The microstructures and element contents of iron tailings powder, cement, and nano-clay are determined by SEM and EDS according to the testing methods in [22]. Fig. 2 a is the SEM spectrum of iron tailings powder, showing the random and disorder configuration of iron tailing particles and many pores with different radii (>1 μm) between …

Publish Date: 25 June 2022. Abstract. 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 …

 — As iron tailings contain heavy metal which is a potential damage to natural environment [35], leaching toxicity tests of IT-contained UHPC mixtures was tested according to the Chinese national standard GB 5086.2-1997. The leaching ability of P3T0 with the maximum ITP content and P3T4 with the maximum ITP and ITS content was …

 — The dolomite rock powder and iron tailings powder composing a large number of active substances could be advantageous to the cement-based materials. In this study, the electrical resistivity of ...

In this study, the iron tailings from dierent regions in Hebei Province of China were selected to investigate the application of iron tailings in cement-based materi-als as ne aggregate and mineral admixture. Moreover, the methods of acid and alkali activation were adopted to increase their pozzolanic activity. e strength and activ-ity index of ...

 — To investigate the application of iron tailings in cement-based 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 …

 — Dolomite rock powder (the waste stone residue in the production of machine-made sand and stone processing) and iron tailings powder formed by mineral processing industry are solid wastes, which … Expand. 11. PDF. Save. Mechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers.

 — The mine tailings are inhomogeneous and have a complex mineral, aggregate, and chemical composition [59, [109], [110], [111]].Furthermore, although having relatively low quantities of valuable components, mine tailings contain hazardous and toxic compounds connected with waste products or mining activities [82, 84, [112], [113], …

 — Two kinds of composite mineral admixtures were prepared by grinding iron tailings powder and silicon powder in the ratios of 3∶2 and 4∶1, respectively to substitute cement for the preparation of mortar and concrete samples. The basic properties of iron tailings-silica fume composite mineral admixture mortar and concrete have been studied …

 — In order to comprehensively utilize iron ore tailings (IOTs), the possibility of using IOTs as raw materials for the preparation of cementitious composites (IOTCCs) was investigated, and IOTCC was further applied to mine interface pollution control. The mechanical properties, hydration products, wind erosion resistance, and freeze–thaw …

 — Iron tailings continue to generate and accumulate in large quantities, leading to problems such as large land area, environmental pollution and high ecological risks. Therefore, there is an urgent need to develop economic and effective technologies for the large-scale utilization of subway tailings. In this study, aiming at the problems of low ...

 — 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, 2.5–3 tons of tailings will be produced for each ton of iron concentrate powder screened on average.

 — As a result, the potential use of tailings and the "transition" from the tailings to a useful source is a turning point for the mining industry, but it is becoming an important …

 — Studies have shown that iron tailings (IOT) have potential activity and can be used to prepare cementitious materials to replace cement.The purpose of this study was to evaluate the effects of different activation methods, activation time and activator types on the properties of IOT cementitious materials.Different mechanical activation time (0.5 h, …