Showing papers in "Powder Technology in 2022"

TL;DR: In this paper , the development of a prediction model by processing the variational parameters with machine learning and studying properties such as characterization, stability, and density of rGO-Fe3O4-TiO2 hybrid nanofluids has provided an unprecedented study in the literature.

TL;DR: In this article , the influence mechanism of recycled concrete powder (RCP) on the multi-scale characteristics of UHPC mixtures was investigated, and a novel ultra-high performance concrete (UHPC) containing waste concrete powder derived was designed and characterized.

TL;DR: In this paper, the authors analyzed the flow around the cylinder in the tube-row channel heat exchanger through numerical simulation, and they showed that the use of TiO2-H2O nanofluids can improve the comprehensive performance of heat exchange.

TL;DR: In this paper , a study was carried out in which (NH 4 ) 2 CO 3 and SiC powders were used for the first time to suppress PE deflagration flames.

TL;DR: In this paper , the authors analyzed the flow and heat transfer characteristics of tube-row channel heat exchangers with different types and structural parameters, and found that the adjustment of the number of ribs, the height of ribs and the ratio of transverse pitch diameter can increase Nusselt numbers by 53.63%, 57.25%, 52.38% and 12.93% at maximum.

TL;DR: In this article , the effects of paste properties, aggregate bulking, water film thickness, and paste film thickness (PFT) on the permeability and strength of pervious concrete were evaluated.

TL;DR: In this paper, the effects of paste properties, aggregate bulking, water film thickness, and paste film thickness (PFT) on the permeability and strength of pervious concrete were evaluated.

TL;DR: In this paper , a fiber reinforced alkali-activated slag composite (AAGM) mixed with ABFS was used to evaluate the performance of AAGM under high and normal temperature.

TL;DR: In this paper , the feasibility of preparing an eco-friendly binder for cemented paste backfill (CPB) using steel slag after being thermal treated was explored, and the results showed that samples with 15 wt% metakaolin (MK) and 5 t% silica fume (SF) demonstrated the optimal performances.

TL;DR: In this paper, the feasibility of preparing an eco-friendly binder for cemented paste backfill (CPB) using steel slag after being thermal treated was explored, and the results showed that samples with 15% metakaolin (MK) and 5% silica fume (SF) demonstrated the optimal performances.

TL;DR: In this paper, the influence of diverse shapes of nanoparticles on thermal-hydraulic efficacy of a nanofluid having boehmite nanoparticles in a shell and tube heat exchanger was analyzed.

TL;DR: In this paper , the influence of diverse shapes of nanoparticles on thermal-hydraulic efficacy of a nanofluid having boehmite nanoparticles in a shell and tube heat exchanger was analyzed.

TL;DR: In this article, equilibrium molecular dynamic simulations were used to calculate the thermal conductivity of Cu-Ar nanofluid with various initial aggregation structures at different volume fractions, and the microscopic mechanism of the effect of nanoparticle agglomerate aggregation mode on the thermalconductivity of Nanofluids was analyzed.

TL;DR: In this article , equilibrium molecular dynamic simulations were used to calculate the thermal conductivity of Cu-Ar nanofluid with various initial aggregation structures at different volume fractions, and the microscopic mechanism of the effect of nanoparticle agglomerate aggregation mode on thermal conductivities of Nanofluids was analyzed.

TL;DR: In this paper, activated carbon was prepared using KOH activated anthracite Guhanshan (GHS) for CH4 adsorption, and the influencing factors of carbon to alkali ratio, activation temperature, pickling time, and pickling temperature were considered comprehensively.

TL;DR: Wang et al. as mentioned in this paper investigated the effect of surfactants in compound solution on the wetting-agglomeration properties of the bituminous coal dust, and selected anionic surfactant SDS, SDBS and non-ionic surface agents APG0810 and PPG400 for compounding with agglomerated solutions.

TL;DR: In this paper , the authors aimed to solve the problem of excessive dust concentration during the tunneling process of continuous mining by using an X-type 2.0-mm nozzle, and the optimal layout was eight nozzles on the upper side of the cutting arm of a continuous miner.

TL;DR: Wang et al. as mentioned in this paper investigated the effect of surfactants in compound solution on the wetting-agglomeration properties of the bituminous coal dust, and selected anionic surfactant SDS, SDBS and non-ionic surface agents APG0810 and PPG400 for compounding with agglomerated solutions.

TL;DR: In this paper , a review of the development of the CFD-DEM investigations for non-spherical particles from theoretical models to applications in recent six years is presented, which primarily represents three principal aspects: the theoretical foundations of DEM for modeling non-sherical particles, the coupling methodologies between CFD and DEM, and the use of the nonspherical CFD -DEM coupling model in different applications involving particle-fluid flows.

TL;DR: In this paper , a novel Pr3+, Tb3+ co-doped YNbO4 phosphor which can be used as a non-contact optical thermometer was successfully developed.

TL;DR: In this article, a novel Pr3+, Tb3+ co-doped YNbO4 phosphor which can be used as a non-contact optical thermometer was successfully developed.

TL;DR: In this paper , a coal face with a large mining height of 6.5 m was taken as the research object, and factors investigated included spray pressure (P), nozzle retraction distance (L), and nozzle quantity (N).

TL;DR: In this article , the rheological behavior and dynamic viscosity of 5 W30 engine oil based ZnO-MWCNT (30:70) hybrid nanofluid with various volume fractions (VFs) ranging from 0.05 to 1 vol%, temperatures in the range of 5-55 °C, and shear rates altering from 50 to 1000 rpm are experimentally evaluated.

TL;DR: In this paper, the inhibition effect of different proportions of Ca(H2PO4)2 and CaCO3 powders on titanium powder explosion was studied, and the inhibition mechanism of inhibitor was analyzed.

TL;DR: In order to improve the accuracy of the parameters used in discrete element simulation study of coconut bran, physical and simulation experiments were combined to calibrate discrete elements simulation parameters of the species as discussed by the authors.

TL;DR: In this paper , the authors reviewed various techniques to produce bulk nanobubbles and the widely used measurement techniques for bulk nano-entities and analyzed the disadvantages of them and provided researchers who are working in the area of mineral processing with rough information about nano-bubbles from the field of interface physics and shed some light on developing new techniques for fine particle separation.

TL;DR: In this article, the authors reviewed various techniques to produce bulk nanobubbles and the widely used measurement techniques for bulk nano-entities and analyzed the disadvantages of them and provided researchers who are working in the area of mineral processing with rough information about nano-bubbles from the field of interface physics and shed some light on developing new techniques for fine particle separation.

TL;DR: In this article , low-cost and eco-friendly AC obtained from waste apricot kernel shells (ACAS) was utilized to simultaneously solve the inherited drawbacks and enhance thermal conductivity of (Capric-Myristic acid (CA-MA), Lauryl alcohol (LAOH), n-Octadecane (OD) and Polyethylene glycol (PEG)) as different type organic PCMs.

TL;DR: In this paper , a numerical simulation of gas-solid flow of stiff shotcrete materials in the pipeline transportation process was carried out, and the linear relationship between unit pressure drop and gas solid ratio was obtained.

TL;DR: In this paper , the effect of nanoparticles' shape on the effective thermal conductivity of nanofluids has been accurately correlated with other influencing factors such as temperature and nanoparticle concentration.