Application of the Rosin-Rammler function to describe quartz sandstone particle size distribution produced by high-pressure gas rapid unloading at different infiltration pressure

Zhang, Genghao; Fan, Yongbo; Yang, Renshu; Li, Shihai

doi:10.1016/j.powtec.2022.117982

Cited by 9 publications

(4 citation statements)

References 17 publications

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“…Te particle size distribution curve obtained by the single experiment shows an R-R distribution as a whole [35]. Coarse particles larger than 0.147 mm are always present and account for almost 50%.…”

Section: Introductionmentioning

confidence: 85%

Production of Micron-Sized Particles of Bauxite by Circulating Pulverization Experiment

Yongbo

Feng

et al. 2022

Advances in Materials Science and Engineering

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A novel process involving the production of micron-sized particles of bauxite by circulating pulverization experiment is proposed. This method is through high-pressure gas infiltration, uniform and equal stress loading, and overcoming tensile strength between particles, which is different from the traditional ball milling based on overcoming compressive or shear strength. The circulating pulverization experiment is designed so that the coarse particles larger than 147 μm need to be repulverized or added to the new bauxite ores and repulverized under the same experimental conditions. The results of the first group of circulating experiments show that the proportion of particles less than 147 μm increases from 27% to 91%, which reveals that the coarse particles larger than 147 μm can be repowdered. The results of the second group of circulating experiments show that the powdering efficiency of particles larger than 147 μm is almost equivalent to the raw ore, and the proportion of particles less than 147 μm after four circulating pulverization experiments can reach 64.5%. The result is crucial for actual production because coarse particles will fill in the raw ore and be repulverized together, which can ensure continuous production and stable pulverization efficiency. Economic analysis reveals that the power consumption of the circulating pulverization experiment is estimated at 0.028$ per ton.

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Section: Introductionmentioning

confidence: 85%

Production of Micron-Sized Particles of Bauxite by Circulating Pulverization Experiment

Yongbo

Feng

et al. 2022

Advances in Materials Science and Engineering

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“…Therefore, this study has extended the AOA indicator to three dimensions and proposed a novel concept of the volume ratio of air age (VOA). This study was inspired by the Rosin-Rammler distribution (Equation ( 13)), which characterizes particle size in materials [41,42] as below.…”

Section: Evaluation Methodsmentioning

confidence: 99%

Research on the Impact of Air Temperature and Wind Speed on Ventilation in University Dormitories under Different Wind Directions (Northeast China)

Cheng,

Yang,

Xie

et al. 2024

Buildings

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This study employs computational fluid dynamics to analyze the natural ventilation conditions of university student dormitories in the northeastern region of China under various outdoor wind directions, wind speeds, and temperature conditions. By separately simulating room natural ventilation efficiency under four different outdoor wind speeds (1.5 m/s, 3.3 m/s, 5.4 m/s and 7.9 m/s) at different outdoor temperatures (−10 °C, 0 °C, 10 °C and 20 ℃), curves of indoor pollutant removal rates (VOA-Time) are established for different wind directions. The study also determines the minimum ventilation time required for rooms under different environmental conditions (TVOA=70%). The data indicate that, despite the promotion of ventilation efficiency with increasing wind speed or indoor-outdoor temperature difference, the wind direction determines the extent to which these factors enhance room ventilation efficiency. Furthermore, there are corresponding mathematical relationships between TVOA=70%, outdoor temperature, wind speed, and different wind directions, allowing for predictions related to the rate of indoor carbon dioxide change. The research findings will assist students in formulating more effective ventilation strategies under complex outdoor environmental conditions.

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“…The method involves high-pressure gas in ltration into the ore, and rapid unloading within milliseconds induces tensile failure and pulverizes it into micron-sized particles [17][18][19][20] . The method can tear apart minerals along the mineral bonding surface [21][22][23][24][25] . High-pressure gas within the ore will break the ore into micron-sized particles along the mineral bonding surface or microcracks, and high-speed impact will break the ore into ne-grained pieces, which is the physical foundation of continuous particle size distribution produced by gas rapid unloading.…”

Section: Introductionmentioning

confidence: 99%

Mineral Dissociation and Enrichment Characteristics of Apatite Pulverized by High-pressure Gas Rapid Unloading and High-Speed Impact Combined Effect

yongbo,

Genghao,

Shihai

et al. 2024

Preprint

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Mineral dissociation and enrichment have always been the core issues in ore processing. The goal of multi-stage crushing and ball milling is dissociation because mineral dissociation is the foundation of beneficiation. High energy consumption and environmental pollution have always been unavoidable topics. We propose a novel method involving continuously graded apatite particles produced by high-pressure gas rapid unloading and high-speed impact. Particle size follows MR-R distribution. The scanning electron microscopy data shows that the apatite particles smaller than 4 mm produced by rapid unloading of high-pressure gas have completely dissociated, and high-grade apatite enriched in the particle size range of 0.5 to 4 mm. The average grade of the preferred particle size interval is 3–5% higher than the original ore because most impurity minerals become fine particles and separate from apatite. The quality proportion of particle size range of 0.5 to 4 mm is higher than that of particle size less than 0.5 mm. Dissociation degrees of apatite less than 4 mm are above 88%, which is beneficial for mineral processing.

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Application of the Rosin-Rammler function to describe quartz sandstone particle size distribution produced by high-pressure gas rapid unloading at different infiltration pressure

Cited by 9 publications

References 17 publications

Production of Micron-Sized Particles of Bauxite by Circulating Pulverization Experiment

Production of Micron-Sized Particles of Bauxite by Circulating Pulverization Experiment

Research on the Impact of Air Temperature and Wind Speed on Ventilation in University Dormitories under Different Wind Directions (Northeast China)

Mineral Dissociation and Enrichment Characteristics of Apatite Pulverized by High-pressure Gas Rapid Unloading and High-Speed Impact Combined Effect

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