agglomeration sintering

Langevin dynamics simulation and collision frequency

Coagulation of nanoparticles from the free-molecular to the transition regime under a high-temperature environment is investigated by coupling Langevin Dynamics (LD) model with agglomeration and finite-rate sintering. The effect of temperature on the evolution of particle size and structure is investigated, variations in agglomeration …

Effect of composite additives on phase transition and …

The α-Al 2 O 3 prepared by precipitation has good purity and sintering activity, but unfortunately, the agglomeration may occur in the sintering process, so strict control of sintering strategy is required. In the last few decades, various additives have been widely used to control the agglomeration and enhance the dispersion of α-Al 2 O 3.

Iron Ore Sintering: Process

Sintering is a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slag-forming agents, and solid fuel …

Accelerated sintering in phase-separating nanostructured alloys

Sintering of powders is a common means of producing bulk materials when melt casting is impossible or does not achieve a desired microstructure, and has long been pursued for nanocrystalline ...

Agglomerative Sintering of an Atomically Dispersed …

Agglomerative Sintering of an Atomically Dispersed Ir1/Zeolite Y Catalyst: Compelling Evidence Against Ostwald Ripening but for Bimolecular and Autocatalytic Agglomeration Catalyst Sintering Steps Journal Article · Tue May 12 00:00:00 EDT 2015 · …

Sintering and agglomeration characteristics of industrially …

Fig. 17 shows the sintering and agglomeration mechanism of the CMTF oxygen carrier particles during the cycling process. At the early stage of cycling, the particles fluidized well and the reactive reaction area was increased during the cycling process, and the reaction performance of the particles was gradually enhanced.

Factors influencing particle agglomeration during solid-state sintering

Discrete element method (DEM) is used to study the factors affecting agglomeration in three-dimensional copper particle systems during solid-state sintering. A new parameter is proposed to characterize agglomeration. The effects of a series of factors are studied, including particle size, size distribution, inter-particle tangential …

The sintering temperature of ash, agglomeration, and defluidisation in

Sintering or agglomeration is formed in the process of the gasification of coal when fluxing K 2 CO 3, which leading to the entire bed defluidization.In order to study the catalytic coal gasification reactivity and agglomeration properties in pressurized fluidized bed, Wangjiata raw coal, demineralized coal with HCl-HF treatment, and raw …

Agglomeration of Powder

Abstract. Agglomeration of powders in pan granulators is a widespread production process, in many industries, e.g., agricultural and pharmaceutical. A continuous operation provides certain desired advantages over batch operation including constant throughput with constant properties of the product particles. An extended setup including a sieve ...

Advances in Sintering and Pellet Technology

Agglomeration processes are typically of three types: pelletizing, briquetting, and sintering. Sintering is a manufacturing technology to make a wide variety of engineering materials, ceramic and …

Interdependence between green compact property and powder agglomeration

Both the green density and powder agglomeration affect sintering behaviour over entire sintering schedule. For a given AP the shrinkage rate reduces with increasing green compact density and vice versa, which is consistent with the literatured reports. The experimental results also showed that compacts with identical starting density showed a ...

Sintering | SpringerLink

The sintering process can be defined as a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slag-forming agents, and solid fuel (coke) with the objective of obtaining a product with the suitable characteristics (thermal, mechanical, physical, and chemical) to be fed to the …

Review of agglomeration in biomass chemical looping technology

However, the problems of agglomeration and sintering are inevitable in the practical application of OCs, which may be due to the self-agglomeration of the OC particles, or the ash-related issue of biomass. These phenomena will lead to the deactivation of the OC and defluidization of the fluidized bed. And these potential …

Size Distribution Change of Titania Nano-Particle …

In the manufacturing of nanometer-sized material particlulates by aerosol gas-to-particle conversion processes, it is important to analyze how the gas-phase chemical reaction, nucleation, agglomeration, and sintering rates control the size distribution and morphology of particles.

Agglomeration of Iron Ores | SpringerLink

Agglomeration of iron ores is the iron ore pretreatment process in which the powdery iron ore that cannot be directly fed into a blast furnace experiences high-temperature solidification by sintering process and pelletizing process or low-temperature solidification by pelletizing process and briquetting process to generate the rich ore …

The agglomeration, coalescence and sliding of …

The conventional sin-tering of a porous green body consisting of coarse polycrystalline particles is a process of grain-growth-induced densification facilitated by atomic difusion …

Iron Ore Agglomeration Technologies | IntechOpen

Sintering is a thermal process (1300–1400°C) by which a mixture of iron ore, return fines, recycled products of the iron and steel …

Sintering mechanism of calcium oxide/calcium carbonate …

The sintering degree is investigated first to confirm the main stage of reactant particles agglomeration. Then diffusivity and energy of the system are calculated to describe the effect of temperature and atmosphere to the sintering process quantitatively, and thus the sintering mechanism of different stages is verified.

What is Agglomeration? Glossary of Powder Mixing …

Pressure agglomeration is usually a dry process. Moisture or binders are not or hardly required. Common products made by pressure agglomeration include effervescent or medicinal tablets, charcoal briquettes and litter. Sintering Sintering, also known as fritting, is a thermal agglomeration process in which atoms diffuse within ...

Langevin dynamics simulation and collision …

Agglomerate. Sintering. Langevin dynamics. Population balance model. 1. Introduction. The gas-phase methods for preparing nanoparticles using a wide variety of …

Structure and dynamics of fractal‐like particles …

Coagulation by simultaneous agglomeration and sintering takes place at high temperature environments, where sintering and …

When mechanisms of coalescence and sintering at the …

Sintering is one of the basic processes of the powder metallurgy which, in turn, is one of the basic technologies for material processing. 1 So, it is no wonder that free sintering of nanoparticles (NPs) and sintering of NPs (powders) under external pressure with common heat sources, such as furnace or convection oven, have been studied and …

Factors in fluencing particle agglomeration during solid …

and Δt=0.5s, the same results can be achieved as those presented in the following sections. Factors influencing particle agglomeration during solid-state sintering 713. 2.2 Interacting force between adjacent particles According to Refs. [24,28,31,32], the normal forceN. sand the tangential forceT.

Basics of Iron Ore Sintering | SpringerLink

Sintering is one of the methods of agglomeration. All iron oxide bearing wastes and coke breeze is used for sintering purpose. The use of limestone in blast furnace is also avoided by using fluxed sinters of suitable basicity. This results in increasing the productivity of the furnace for iron making.

Brief Review of Nanosilver Sintering: Manufacturing and Reliability

Ag-NPs. The brittleness and poor corrosion resistance of intermetallic compounds (IMC) limit the application of classic solder in electronic packaging. 15 Bonding by sintering metal nanoparticles (NPs) is a low-temperature joining technique, which is the most promising alternative to lead-free electronics packaging technology. There have …

Iron Ore Agglomeration Processes and their Historical

The origin of sintering process goes back to 1887 when F. Haberlein and T. Huntington of England invented the process of agglomeration for sintering of sulphide ores. In this process, the sintering was carried with the sintering bed being blown with air from bottom upwards. The process was also known as up-draft sintering process.

Study of the Agglomeration Behaviour of Surface-Modified …

Abstract The agglomeration behaviour of Mo powder, especially fine Mo powder, has been a major concern. The degree of powder agglomeration is directly related to the uniformity of Mo and its alloy powder mixtures and related target materials. This study mainly focuses on how to efficiently reduce the soft agglomerates behaviour of Mo …

Sintering mechanism of CaO during carbonation reaction in …

The main stages of CaO particle agglomeration were determined first, and then the diffusion factors were calculated and the effects of temperature and water vapor on the sintering process were discussed. Finally, the sintering mechanism with the participation of water vapor in the carbonation reaction was proposed. 2. Computational …

Iron Ore Sintering: Process

Sintering is a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slag-forming agents, and solid fuel (coke). The purpose of the sintering process is manufacturing a product with the suitable characteristics (thermal, mechanical, physical and chemical) to be fed to the blast ...

Sintering and agglomeration characteristics of …

Sintering and agglomeration characteristics of industrially prepared CaMn0.5Ti0.375Fe0.125O3-δ perovskite oxygen carrier in chemical looping combustion …