Showing papers in "Powder Technology in 2023"

TL;DR: In this article , high-strength geopolymers were prepared from red mud (RM) and Class 1, 2, and C fly ash (FA) rich in active substances (FA1, FA2, and FAC, respectively) in the presence of an AA.

TL;DR: In this article , a conceptual dynamic model was developed and applied to predict the particle size of hybrid composite powders reinforced with Ti and SiC fabricated by mechanical alloying, and the effect of milling time on the morphology, microstructure, and particle size was investigated.

TL;DR: In this paper , the effect of steel fibers on the packing of aggregates was investigated and a novel prediction model considering the relative size of fiber and aggregate as key factors was developed and the synergistic effect on aggregates by hybrid fibers was also incorporated into the model.

TL;DR: Wang et al. as mentioned in this paper developed a CL and explored the interactions between hydrocyclone variables by the most recent XAI method called Shapley Additive exPlanations (SHAP) and a novel machine learning model, CatBoost.

TL;DR: In this article , the rheological and tribological measurements of the SAE 5W30 multi-grade engine oil as a base lubricant and a novel ternary combination of molybdenum trioxide (MoO3), graphene oxide (GO), and multi-walled carbon nanotubes (MWCNTs) as nanopowders were conducted in a wide range of solid volume fractions (VF = 0-1.5%), shear rates (SR = 665-12,635 s−1), and temperatures (T = 5-65 °C).

TL;DR: In this article , the effect of particle cohesion, vibration parameters, and wall-particle friction conditions on the mixing process of binary spherical particles in a vertical vibrating container were studied by the discrete element method.

TL;DR: In this paper , a fractal model for the KCC constant and dimensionless permeability of roughened porous media composed of particles and converging-diverging capillaries is proposed.

TL;DR: Wang et al. as discussed by the authors summarized the comprehensive utilization status of steel slag in building materials, agriculture, wastewater treatment, marine engineering, ceramics, and CO2 mineral carbonation and sequestration.

TL;DR: Wang et al. as discussed by the authors constructed a surfactant-water-coal interfacial simulation system, and the microscopic interfacial wettability of four surfactants, rapid penetrant T (RPT), sodium dodecylbenzene sulfonate (SDBS), dodechyl glucoside (APG), and cocamidopropyl betaine (CAB), on coal dust was discussed.

TL;DR: An eco-friendly UHPC was designed by the modified Andreasen and Andersen packing model and prepared with cement partially replaced by steel slag powder (SSP) and glass powder (GP) at a fixed mass ratio of 2:1 as discussed by the authors .

TL;DR: In this article , Mg(OH)2/NH4H2PO4 composite dry powder (CDP) with different quality ratios was prepared, and explosion suppression experiments were performed to determine the explosion suppression effect of the CDP.

TL;DR: In this article , the influence of dry water powder quality and MAP concentration on gas explosion characteristics was investigated, and a new high-efficiency gas explosion suppression material was obtained, which highlighted the importance of coal mine safety in relation to gas explosions.

TL;DR: In this paper , a numerical simulation was conducted on the elastic screen surface and movement of particles based on finite element method and discrete element method coupling, and the result of on a single elastic screen plate indicated that when the excitation angular frequency of the screen was 70 rad/s, the effect of different sizes of particles' stratification on the screen surface was better.

TL;DR: In this article , two different artificial neural networks were created to predict the thermal conductivity and zeta potential of Fe3O4/water nanofluid prepared at three different concentrations were experimentally measured.

TL;DR: In this article , the effects of temperature, hydrogen velocity and concentration on the reduction performance of micron-sized combusted iron powders using hydrogen in a lab-scale gas-fluidized bed are investigated.

TL;DR: In this article , the effects of various operating and material variables (temperature, gas flow rate, and particle size) on the fluidization and agglomeration behavior of micron-sized combusted iron particles are investigated.

TL;DR: In this paper , a series of mechanical and microstructural tests and monitoring experiments are performed on different cemented paste backfill (CPB) specimens made with different types of tailings (silica tailings, gold tailings) to investigate the effects of adding nano-silica (SiO2) particles on the strength and microstructure (pore structure, mineralogical composition) of CPB cured under isothermal and non-isothermal conditions that simulate the field thermal curing conditions of CPb structures.

TL;DR: In this article , the authors compared the mixing behavior of a twin paddle blender containing non-spherical particles with that comprising spherical particles using the discrete element method (DEM) and found that diffusion was the superior mixing mechanism.

TL;DR: In this article , a number of standard and advanced flowability techniques were used to characterise the flowability of two grades of Ti6Al4V powder (gas atomized, GA, and hydride-dehydride, HDH) used for the powder bed fusion (PBF) based additive manufacturing (AM) is still challenging.

TL;DR: In this paper , the effect of local wall erosion on the performance of the cyclone separator using the computational fluid dynamics (CFD) technique was investigated using the Oka erosion model.

TL;DR: In this article , the combined discrete element method (DEM) and computational fluid dynamics (CFD) model is employed for investigating the SCW-solid flow in the cyclone, and the effect of inlet velocity is investigated and analyzed in terms of flow fields and the interaction forces between particlefluid, particle-particle and particle-wall.

TL;DR: In this article , the pore structure of CTB is correlated to its mechanical characteristics (i.e., elastic modulus, uniaxial compressive strength), and the influence of curing conditions such as temperature (20-50 °C), stress (0-540 kPa), and time (3-28 days) on mechanical and pore structures characteristics of the CTB.

TL;DR: In this paper , a prepacked aggregate geopolymer (PAG) is prepared for the first time, which has high early-age strength and environmental benefits, and the results show that PAG has a high hardened unit weight due to the high aggregate content, and that changing the precursor composition has little effect on it.

TL;DR: In this article , the fluidization behavior of binary mixed particles is investigated based on the coupling of computational fluid dynamics and the discrete element method (CFD-DEM), which can provide a reference for the optimal design of fluidized beds, especially for biomass applications with binary particles.

TL;DR: In this article , the effect of slotted vortex finder on the swirling turbulent flow characteristics of cyclone separator in comparison with conventional vortex finders (CVF) was discussed. But the main purpose of this paper is to illustrate the effect that slotted Vortex Finder (SVF) has on cyclone performance.

TL;DR: In this article , a detailed study on proppant bed motion induced by shearing flow is performed, where the particle flux increases quadratically with the fluid flux, from which a nonlinear relationship is concluded.

TL;DR: In this article , a modified vortex elbow designed to handle coarse particles is presented, and the effects of particle size on the flow characteristics and elbow erosion of the modified elbow are quantified and compared with those of the standard elbow.

TL;DR: In this article , the authors investigated the effect of included angle and nanoparticles size arrangement on thermal conductivity of Cu/Ar nanofluids and found that included angle θ ranged from 0 to 90°, and six types of size arrangements were designed using combinations of r1 and r2 of Cu nanoparticles of 11 Å and 8.45 Å, respectively.

TL;DR: In this paper , the authors used a high fidelity non-boundary fitted Distributed Lagrange Multiplier/Fictitious Domain method implemented on an adaptive Cartesian octree grid to investigate the unbounded flow of a Newtonian fluid past a stationary polyhedron.

TL;DR: In this paper , the side surface roughness of the as-built part was increased with linear energy owing to the formation of wavy bulges and the right-angled stair edge was relaxed at high linear energy due to the increased molten pool dimension.