Microscopic liberation mechanisms of oolitic iron ore under microwave irradiation and optimization of irradiation parameters

Like, Qin; Chen, Guodong; Xu, Guoqiang; Zhen, Gang; Jia, Hailiang

doi:10.1016/j.mineng.2022.107402

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…Previous studies already show that microwave treatment is a sufficient pre-treatment method for various minerals. Microwave irradiation pretreatment was called a new type of clean energy for coals (Ma et al, 2020), increasing desulfurization of coal after adding magnetite enhanced magnetic separation of FeS2 (Uslu ve Atalay, 2004), grindability of high-ash coals (Sahoo et al, 2011), oxidized coal flotation (Xia et al, 2013), microwave-heated effects on phase transformation (Yang et al, 2016), preg-robbing (Wei Sung et al, 2020, magnetic separation of Fe and Ti (Kim et al, 2019), liberation of oolitic iron ore (Qin, et al, 2022), phase transformations of ilmenite ore (Myslyvchenko, et al 2022), Cr recovery (Peng et al, 2020), As removal (Ma et al 2010), Cu recovery (Kingman et al, 2004), Mn ore (Li et al, 2020), the roasting of flash flotation concentrate (Amankwah and Ofori, 2020). The attention of researchers is primarily concentrated on liberation of coal and separation of pyrite, although a few processes have focus on refractory gold and gold tailings.…”

Section: Literature Surveymentioning

confidence: 99%

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Modeling and box-Behnken design optimization of microwave pretreatment of sulphidic gold flotation tailing

Benli¹,

Baştürkçü²

2022

Physicochem. Probl. Miner. Process.

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As raw minerals become scarcer every passing day, the need for the recovery of mine tailings becomes essential. This research highlights the use of microwave energy as a green alternative to otherwise environmentally harmful methods of ore tailing recovery. The obtained results indicate that a 1.4 ppm Au and 3.5 % S sample floated with Aeroflot 208 and Aerophine 3418A increased the concentration of tailings over 18 % S and 4 ppm, Au, for recovery yield, resulting in 84 % and 80 % recovery, respectively. After microwave irradiation, 90 % of sulphur removal was reached under the optimum conditions of 50 minutes of irradiation using 1000 W for 4 g of the sample. Overall with 96. 74 % correlation of the quadratic model using the Box-Behnken design and expressed coefficient R2 regression the model was proven to be suitable for heating and roasting processes of gold-bearing tailings.

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Section: Literature Surveymentioning

confidence: 99%

“…This selectivity is influenced by dielectric properties of ore and gangue minerals including gold, metals, sulfides, silicates, and carbonates as seen in Table 1. et al, 1936;Hemingway et al, 1981;Khesin and Eppelbaum, 1994;Popov et al, 1987;Bundschuh and Suárez, 2010)…”

Section: Introductionmentioning

confidence: 99%

Modeling and box-Behnken design optimization of microwave pretreatment of sulphidic gold flotation tailing

Benli¹,

Baştürkçü²

2022

Physicochem. Probl. Miner. Process.

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“…However, the force can still be transmitted after the plastic zone appears, which is inconsistent with the actual cracking situation. The discrete element method can be accurately used to simulate crack propagation, and to study the liberation of minerals in general (Ali and Bradshaw 2011;Qin et al 2022), but it has not been applied in the study of microwave-assisted liberation of concrete. The reasons are as follows: (1) the ores have two-phase, and the dielectric properties are quite different from each other; (2) the size of a single mineral particle is very small, and the difference of its internal electric field, energy consumption power density and energy consumption power distribution can be negligible under microwave irradiation.…”

Section: Introductionmentioning

confidence: 99%

Study on Microwave-assisted Liberating Coarse Aggregate Based on the Coupling Method of Finite Element and Discrete Element

Liu

Chen³

et al. 2022

ACT

Self Cite

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A coupling method of finite element and discrete element was used to simulate the process of microwave liberating coarse aggregate under different power conditions, and it deals with the problem that the finite element method can not simulate the cracking process and the discrete element method can not consider the nonuniformity of microwave in the concrete specimens. The liberation ratio was proposed as the quantitative evaluation index, and the influence of microwave power on the liberating effect was analyzed based on the change of the liberation ratio. The mechanism of microwave-assisted liberation was discussed. It was found that the temperature distribution and crack distribution in the test specimens changed with irradiation time and microwave power; the optimal irradiation time and the optimal microwave power were obtained by liberation ratio under different irradiation conditions, and the simulation results were verified by preliminary tests; the coarse aggregate was under tension in both circumferential and radial, while the mortar is under compression in circumferential and under tension in radial under microwave irradiation. Cracks are produced by tensile stress at the junction of coarse aggregate and mortar, then the coarse aggregate are liberated from the mortar.

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In-Situ Investigation of Phosphorus Transformation and Distribution During Gas-Based Reduction of High-Phosphorus Oolitic Hematite

Ji,

Xiao,

Gao

et al. 2024

Metall Mater Trans B

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Microscopic liberation mechanisms of oolitic iron ore under microwave irradiation and optimization of irradiation parameters

Cited by 5 publications

References 28 publications

Modeling and box-Behnken design optimization of microwave pretreatment of sulphidic gold flotation tailing

Modeling and box-Behnken design optimization of microwave pretreatment of sulphidic gold flotation tailing

Study on Microwave-assisted Liberating Coarse Aggregate Based on the Coupling Method of Finite Element and Discrete Element

In-Situ Investigation of Phosphorus Transformation and Distribution During Gas-Based Reduction of High-Phosphorus Oolitic Hematite

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