Study of mean residence time in novel U-type fluidized bed reactor: Model prediction and experimental validation

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-28 DOI:10.1016/j.powtec.2025.120992

Zhidong Tang , Shaokai Cheng , Peng Gao , Yuexin Han , Yanjun Li

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引用次数: 0

Abstract

Fluidized bed roasting exhibits excellent application prospects for processing refractory iron ores, with the residence time of hematite powders in reactor being a critical factor that affects roasted product quality. In this study, a model for the mean residence time of materials in a U-type reactor was established and validated through cold experiment system. The effects of fluidization chamber airflow, supply chamber airflow and delivery rate were explored with different particle size of hematite. The results showed that the mean residence time of hematite powders predicted by the model and obtained from the experimental data decreased gradually with the increase of the fluidization chamber airflow, supply chamber airflow, and delivery rate. 70 groups of mean residence times for different working conditions matched very well with the model-predicted, with an error margin of less than ±8.58 %, which confirmed the validity of the proposed model. This model holds significant importance for regulating and optimizing the operational parameters of hematite during suspension roasting.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.