آخرین محصولات
Low-carbon treatment of zinc contaminated iron tailings …
@article{Wei2022LowcarbonTO, title={Low-carbon treatment of zinc contaminated iron tailings using high-calcium geopolymer: Influence of wet-dry cycle coupled with acid attack}, author={Mingli Wei and Yuan Li and Bo‐Ming Yu and Wei Wei and Lei Liu and Qiang Xue}, journal={Journal of Cleaner Production}, year={2022}, …
Influence of mechanical treatment and magnetic separation …
DOI: 10.1016/j.jobe.2022.105099 Corpus ID: 251652229; Influence of mechanical treatment and magnetic separation on the performance of iron ore tailings as supplementary cementitious material
Finding New Life for Tailings: Sustainable Technology for …
The treatment of ferrous tailings reduces the total amount and the remaining waste contains only a minimum amount of sulfur. The problematic elements usually found in tailings, like Hg, As, Se, and Sb are separated and collected in the roasting /wet gas cleaning process stage. ... Carmignano O et al (2021) Iron ore tailings: …
Feasibility of Iron Ore Tailings in Geopolymer Concrete for …
Specific gravity and particle size distribution of iron ore tailings were determined through standard pycnometer test and sieve analysis. Iron ore tailings sample, as shown in Fig. 1, meet the particle size distribution requirements for fine aggregate by falling within the IS limits; it was used to produce cubes to ensure strength attainment ...
A critical review on metallurgical recovery of iron from iron ore tailings
Abstract The mineral processing of low-grade iron ores commonly generates large volumes of slime, which are disposed as tailings. Modern mining requires strives to eliminate the use of tailings ...
The Influence of Iron Tailings Powder on the Properties on …
Iron tailings powder (ITP) is a kind of solid waste, which pollutes the environment, without any treatment. The application of ITP in cement concrete is a good choice. In this study, the influence of ITP on the flowability, compressive strength, chloride ion permeability and the attenuation of the performance of cement concrete during …
Basic characteristics and environmental impact of …
The energy consumption required for the one-time treatment of GBFS powder with the SSA of 400 m 2 kg −1 or more is about 80 kW h·t −1 for a large industrial ball mill. ... and basic characteristics of …
Investigation on the Prevention and Treatment …
tailings, exhibit a single pore structure, and accelerating hydration reaction reduces the total porosity of the mixed samples [24]. Furthermore, the addition of cement to iron tailings signicantly improves their mechanical properties [25, 26]. The addition of y ash changes the Al/Si ratio in the tailings, thereby improving the mechanical and ...
New ReTo Project to Conduct Annual Iron Ore Tailings Treatment …
New ReTo Project to Conduct Annual Iron Ore Tailings Treatment with Capacity of Three Million Tons and Anticipated Sales of Approximately RMB 280 Million News provided by ReTo Eco-Solutions, Inc.
Quantification of abiotic reaction rates in mine tailings: …
Effective treatment techniques for eliminating iron-oxidizing (IOB) and sulfur-oxidizing bacteria (SOB) are required for the comparison of abiotic and microbial sulfide oxidation rates and mechanisms in mine tailings. This study evaluates the effect of autoclaving, repeated heating, ethanol treatmen …
Process effluents and mine tailings: sources, effects and management
Increasing population levels, growing economies, rapid urbanization and changes in consumption patterns have increased the demand for raw materials such as base and precious metals, leading to growing concerns regarding their availability and the global efficiency of the mine supply chain. Mine tailings, consisting of process effluents …
Preparation of particle electrodes for landfill leachate treatment …
Iron tailings are the waste remaining after the separation of iron ore mining, mainly composed of Si, Ca, Fe, ... Investigating the electrocoagulation treatment of landfill leachate by iron/graphite electrodes: Process parameters and efficacy assessment. Water (switzerland), 14 (2022), 10.3390/w14020205. Google Scholar.
Effects of Heat Treatment System on Mechanical Strength …
For comprehensive utilization of solid wastes, the CaO-MgO-Al 2 O 3-SiO 2 glass-ceramics have excellent mechanical properties were prepared the glass-ceramics were prepared with coal gangue and iron ore tailings by a modified melting method. Heat treatment consists of nucleation and crystallization, the best heat treatment in the experiment of coal …
Tailings storage facilities, failures and disaster risk | Nature
This Review summarizes the major tailings storage facility disasters and impacts, emphasizing the urgent need for risk reduction approaches for management …
A Review on Remediation of Iron Ore Mine …
Mine tailings remain in dams/open ponds without further treatment after valuable metals such as iron ore have been extracted. Therefore, rehabilitation of tailings to mitigate the negative …
(PDF) Canadian pyrrhotite treatment: the history, inventory …
Pyrrhotite, an iron sulfide, is the primary gangue sulfide that occurs in nickel sulfide deposits though it typically contains Ni, either in solid solution or as fine pentlandite intergrowths ...
Use of iron mine tailing as fillers to polyethylene
The replacement of HDPE pure by the composite HDPE/iron mine tailing in several uses present an alternative to the disposal of iron mine tailings.
Stabilization of iron ore tailings with cement and bentonite: …
Iron ore tailings. A number of representative iron ore tailing samples were acquired from different locations of the dry tailing disposal areas (cf. Fig. 2).As illustrated in Fig. 3, the tailings were loosely dumped as piles; thus, their sampling did not necessitate any particular practice and merely involved filling bags with a hand shovel.A total …
Response Surface Design Models to Predict the …
Tailing storage facilities are very complex structures whose failure generally leads to catastrophic consequences in terms of casualties, serious environmental impacts on local biodiversity, and disruptions in …
Influence of mechanical treatment and magnetic separation …
The iron ore tailings acted as a filler and nucleating agent for the hydration reactions. ... For the pastes with IOT, 34 g of cement and 6 g of tailings (in each treatment condition), previously mixed, and 20 g of water were used. The water was automatically inserted into the system by the equipment, 30 min after the beginning of the test and ...
Performance evaluation of Fe-based water treatment sludge …
This research attempted to investigate the feasibility of using drinking water treatment sludge (ferric chloride sludge, FCS) as a coagulant for turbidity removal from iron ore tailings slurry. The evaluation was performed in two phases.
Critical state analysis of two compacted filtered iron ore tailings …
Here the study focuses on the application of selective flocculation process for beneficiation of synthetic mixtures of iron ore and kaolinite as well as iron ore tailings.
A critical review on bioremediation technologies of …
The physical-chemical strategies of conventional technologies, such as constructed barriers were implemented to prevent the further spreading of tailings, but are limited by their high costs (approximately 100–500 $/ton) (Cristaldi et al., 2017).Phytoremediation are also limited because the acidification conditions of tailings …
Investigation on the Prevention and Treatment Measures of …
To address the problem of seepage failure that affects the stability of the fine-grained tailings dam, two kinds of prevention and treatment measures were proposed involving composite flocculants ...
Efficient iron recovery from iron tailings using advanced …
Given the complex composition of iron minerals and the low grade of iron present in the tailings, innovative suspension roasting-magnetic separation (SRMS) …
Transforming Mining Waste to Wealth: A Novel …
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 …
Preparation of particle electrodes for landfill leachate treatment …
Based on this, we propose to use the spheres prepared from needle coke loaded with iron and copper bimetals as particle electrodes for 3DEF. Iron tailings are the waste remaining after the separation of iron ore mining, mainly composed of Si, Ca, Fe, Al, Mg elements, which can be developed and utilized as secondary resources [38], [39], [40].
Take two: why mine tailings are worth another look
Based in the state of Minas Gerais, Brazil, Agera receives the sand produced from the treatment of tailings at Vale's iron-ore operations in the state and promotes its commercialisation and distribution. Vale began producing Sustainable Sand in 2021 after seven years of research as a substitute for sand extracted from the environment. Since ...
Low-carbon treatment of zinc contaminated iron tailings …
Solidification treatment of highly cohesive tailings is one of the important means for resource utilization. Highly cohesive iron tailings were taken as the object to carry out strength ...
Low-carbon treatment of zinc contaminated iron tailings …
Traditionally, there have been some studies investigating the effect of cement treatment on iron tailings (Djellali et al., 2019; Xu, 2013). However, high cement dosages are normally involved. For example, Xu (2013) used the optimum dosage of cement (15%) to stabilize iron tailings as base and subbase courses of the low-grade highway. ...
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