Characterization of chalcopyrite ore under high voltage pulse discharge: Particle size distribution, fractal dimension, specific energy consumption, grinding kinetics

Qin, Yonghong; Han, Yuexin; Gao, Peng; Li, Yanjun; Yuan, Shuai

doi:10.1016/j.mineng.2022.107631

Cited by 9 publications

(3 citation statements)

References 37 publications

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“…These results are in agreement with those of Benzer et al [66] [67] who also observed that clinker is the most difficult material to grind among the cement components. It would therefore be interesting to study the effect of co-grinding and grinding aids on reducing the residence time and energy cost of clinker grinding, as suggested by Gao et al [68]. The other rocks (dolerite, basalt and metabasalt) have faster grinding kinetics, but they are limited by a peak time beyond which grinding becomes inefficient.…”

Section: Discussionmentioning

confidence: 99%

Study and Modeling of the Grinding Kinetics of Reactive Rocks in a Cement Laboratory

Max,

Charles,

Hochéà

et al. 2023

JMMCE

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This article focuses on the study of crushing rocks that can replace clinker in low-carbon cement. A laboratory ball mill was used, varying the duration of the grinding. It has been observed that the specific surface of rocks changes in a nonlinear way with time, due to the agglomeration of particles. To this end, a mathematical model describing this evolution, which considers van der Waals forces, has been proposed. And finally, the model was adjusted regarding the experimental data. The results found show that the present model is more accurate than the classical models, because it considers the agglomeration phenomenon.

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Section: Discussionmentioning

confidence: 99%

Study and Modeling of the Grinding Kinetics of Reactive Rocks in a Cement Laboratory

Max,

Charles,

Hochéà

et al. 2023

JMMCE

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“…Qin [31] first conducted a PPD pretreated magnetite quartzite test study, and the results showed that the relative grindability increased significantly with the increase in pulse number, then decreased with the increase in grinding fineness and grinding time. Subsequently, the PPD crushing ore test [32] was carried out, and it was found that PPD could significantly reduce the mechanical strength of the ore and improve the grinding efficiency of the ore. Yan [33] studied the critical crushing characteristics and influencing factors of ore particles in regard to PPD, analyzing the transformation of crushing mechanism, discussing the energy conversion efficiency in the process of PPD crushing, and revealing the law of influence of ore particles on PPD crushing. Yin [34] conducted a PPD experiment on the change in peak voltage of the heated granite sheet, using the Particle Flow Code numerical simulation method to simulate the pulse power crushing process of the granite.…”

Section: Introductionmentioning

confidence: 99%

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Lin,

Yang,

Liu

et al. 2024

Buildings

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The application of pulse power discharge (PPD) technology in the crushing and dismantling of concrete structures has characteristics related to both green and environmental protection, as well as safety and reliability, with broad application prospects in the construction and municipal engineering fields in dense urban areas. Nevertheless, the research into using this technology to break reinforced concrete (RC) slabs is very limited, while the influence of key parameters on the crushing effect of reinforced concrete slabs is not clear. To solve this problem, a finite element model of an RC slab was established by ABAQUS. The effect of a shock wave generated by PPD on the surrounding concrete was simulated by an explosion-load equivalent, and the development process of concrete crack was simulated by a cohesive force model. Based on the results of the model analysis, the effects of reinforcement spacing, as well as diameter and concrete strength on the crushing effect of RC slabs were investigated. The results show that the increase in reinforcement diameter and the decrease in reinforcement spacing have a significant effect on limiting the development of cracks. According to the development of cracks, they can be divided into three types: edge cracks, cracks between central holes, and cracks between edge holes. The influence of reinforcement spacing and diameter on the first two crack widths is the most obvious. The increase in concrete strength also reduces the width of cracks. Based on the analysis results, the calculation expressions of the crushing effect of the PPD technique on RC slabs were established, which provides theoretical support for the popularization and application of this technique.

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“…The average size of proteins were 8.60, 6.66, 5.42, and 4.85 μm after treated by 10, 20, 30, and 40 min, respectively. The decreasing in size of protein powder after EHD pretreatment indicate high voltage pretreatment could significantly reduce the mechanical strength of particles(Qin et al, 2022). The increase of voltage was beneficial to particle fragmentation(Qin et al, 2021).Fat absorption capacity is the binding of fat by nonpolar side chains of proteins.…”

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confidence: 99%

Assessment of electrohydrodynamic (EHD) pretreatment effects on functional and structural properties of protein isolate from sprouted mung bean

Vahed

Ahangar

Nourani³

et al. 2023

J Food Process Engineering

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This study aimed to investigate the effects of electrohydrodynamic (EHD) pretreatment on the functional properties of sprouted mung bean protein isolate (SMPI).Here, the effects of EHD voltage and time on the extraction yield (EY), protein solubility (PS), water-holding capacity (WHC), oil absorption capacity (OAC), foaming capacity, and foaming stability of SMPI were evaluated. The results confirmed that the extracted SMPI at the EHD voltage of 20 kV had the highest EY, PS, WHC, OAC, and foaming properties. Furthermore, the EHD time of 40 min resulted in the production of SMPI with significantly high ES, PS, WHC, and foaming properties. The results of environmental scanning electron microscopy showed that increasing the EHD time to 40 min broke the protein cell structure. The more breaking occurs in the cell walls, the more protein extraction. Therefore, the application of EHD pretreatment as a green technique improves the functional properties of SMPI. EHD technique can be used as an applied and simple technique to improve the functional and structural properties of mung bean protein isolate in the food industry. Practical ApplicationsElectrohydrodynamic (EHD) is an environmentally friendly technique used to increase the heat and mass transfer rates in different processes. Sprout is one of the main mung bean products, an inexpensive source of proteins and nutrients for human health. In recent years, the consumption of sprouts has become more desirable due to their health benefits. Indeed, germination is a simple and effective process to transform raw seeds into useful products and enhance their nutritional quality. Moreover, germination increases the content of proteins, total dietary fiber, and phenolic compounds. Therefore, sprouts can be used as a more appropriate protein source, and it is better to extract proteins from sprouted seeds. Therefore, EHD is a green process with improved functional properties of sprouted mung bean protein isolate, which can be used as an ingredient in food products.

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Characterization of chalcopyrite ore under high voltage pulse discharge: Particle size distribution, fractal dimension, specific energy consumption, grinding kinetics

Cited by 9 publications

References 37 publications

Study and Modeling of the Grinding Kinetics of Reactive Rocks in a Cement Laboratory

Study and Modeling of the Grinding Kinetics of Reactive Rocks in a Cement Laboratory

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Assessment of electrohydrodynamic (EHD) pretreatment effects on functional and structural properties of protein isolate from sprouted mung bean

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