Comminution of pulverized Pittsburgh coal during ASTM E1226-12a dust combustibility testing

Miller, J.W.; Mulligan, Phillip R.; Johnson, Catherine E.

doi:10.1016/j.powtec.2020.07.059

Cited by 13 publications

(2 citation statements)

References 9 publications

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“…Although there is no consensus yet on the main mechanism responsible for particle fragmentation in the 20L sphere, particle fragmentation can occur due to a combination of the following mechanisms: (1) mechanical shear caused by the dispersion nozzle [138], (2) action of the outlet valve [135], and (3) the baroclininc effect [139]. Moreover, recent studies suggest that there are other factors that may also play a role on the degree of particle break-up, e.g., the type of nozzle [140], hardness and fracture toughness of the sample [141], and dust concentration [142]. However, according to the breakage classification of Bagaria et al [141], among all the post-dispersion PSD measurements of pharmaceutical, carbonaceous and biomass samples, the latter dusts exhibited the lowest (very little or none) fragmentation during the dispersion process in various closed vessels.…”

Section: Validation Of the Pressure-time Curvementioning

confidence: 99%

Computational assessment of biomass dust explosions in the 20L sphere

Islas

Fernández

Betegón

et al. 2022

Process Safety and Environmental Protection

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Section: Validation Of the Pressure-time Curvementioning

confidence: 99%

Computational assessment of biomass dust explosions in the 20L sphere

Islas

Fernández

Betegón

et al. 2022

Process Safety and Environmental Protection

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“…In addition, particle size distributions can be characterized in terms of the span, which gives an indication of the distance between the 10th (D10) and 90th (D90) percentile, normalized with respect to the 50th percentile (D50) [A,B]. A smaller span indicates a narrower particle size distribution [20]; however, the span obtained here was 2.94 (span > 1), which indicates that size distribution can be considered as non-homogeneous.…”

Section: Characterization Of the Zinc Sulfide Precipitatesmentioning

confidence: 99%

Integrated Membrane Process Coupled with Metal Sulfide Precipitation to Recover Zinc and Cyanide

et al. 2022

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In gold cyanidation plants, which include a zinc cementation process, there is a progressive increase in zinc content in the solution and a higher cyanide concentration in leaching tailings. Consequently, there are opportunities to: (i) recover zinc and cyanide from these solutions, (ii) generate a saleable ZnS by-product, and (iii) reduce cyanide consumption and cyanide concentration in leaching tailings. Previous studies have proposed the use of the SART (Sulfidization, Acidification, Recycling, and Thickening) process for this purpose; however, this process has disadvantages that must be addressed. This study presents the results of the experimental assessment of an alternative process, the SuCy process, which uses an integrated membrane process. The SuCy process is composed of a metal sulfide precipitation coupled with a membrane filtration stage, a membrane contactor step to recover and concentrate cyanide, and a final neutralization and ultrafiltration stage. The flux obtained for zinc sulfide separation was around 0.01 L/m2s, with cyanide recovery of 95% at 60 min, whereas flux for ultrafiltration was 0.22 L/m2s. A comparison with an experimental study of the SART process at laboratory scale showed that the SuCy process could obtain a higher zinc recovery and can reduce the solid–liquid separation equipment by around five times. Therefore, the SuCy process could be a promising alternative for zinc and cyanide recovery in gold cyanidation.

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Influence of Particle Size on the Flammability and Explosibility of Biomass Dusts: Is a New Approach Needed?

Castells,

Tascón,

Amez

et al. 2023

Fire Technol

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The influence of particle size on the flammability and explosion severity has been widely demonstrated for coals along the years: the thinner the particle size, the more flammable is the dust and more severe are the explosions. Later, the increase on the use of biomass led to using the same resources and techniques for both groups of materials, considering them similar enough. However, there are basic differences between biomass and coal dust particles that leads to different behaviours when focusing on industrial fire safety. This difference is the starting point of this review, where a study on the existing knowledge in relation to the size and shape of biomass dust is presented. The methodologies and parameters used to determine particle size are described and discussed, showing the inconvenience of using only one parameter (d50) to describe dust, as well as the need of a standardized methodology to homogenise the results. The biomass data gathered from scientific literature and the following analysis carried out has also highlighted the importance of identifying samples in an accurate way and the strong necessity of further research on these materials and on the interdependence between particle size and the experimental procedures for flammability and explosibility properties.

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Comminution of pulverized Pittsburgh coal during ASTM E1226-12a dust combustibility testing

Cited by 13 publications

References 9 publications

Computational assessment of biomass dust explosions in the 20L sphere

Computational assessment of biomass dust explosions in the 20L sphere

Integrated Membrane Process Coupled with Metal Sulfide Precipitation to Recover Zinc and Cyanide

Influence of Particle Size on the Flammability and Explosibility of Biomass Dusts: Is a New Approach Needed?

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