The granulation step determines the production yield and the final characteristics of the agglomerated couscous grains of durum wheat. The objective of the present work was to explore the capability of the fluidised bed technology to produce agglomerates of durum wheat semolina. The impacts of different processing conditions have been investigated on the structure and functional properties of the agglomerates. The size, shape, water content, compactness, and mechanical strength of the granules were measured. The fluidized bed agglomeration process has been found to produce agglomerates of durum wheat with different attributes compared to those produced by granulation using the low shear mixers. The results were discussed in regard to the hydro-textural approach, in order to get a better understanding of the mechanisms and relationships between process, structure, and properties. Two major agglomeration mechanisms contribute to the growth of the wet agglomerates: a fractal-structuring process followed by a phenomenon of densification. By studying the evolution of the compactness, diameter and water content, it was demonstrated that inter granular arrangements led to an expansion followed by a densification of the wet agglomerates. A relationship was proposed to describe the growth using a fluidized bed of the wet agglomerates of durum wheat semolina.

制粒步骤决定了硬质小麦的团聚蒸粗麦粉的产量和最终特性。本工作的目的是探索流化床技术生产硬质小麦粗粉的附聚物的能力。已经研究了不同加工条件对附聚物的结构和功能性质的影响。测量颗粒的大小，形状，含水量，致密性和机械强度。与使用低剪切混合器制粒生产的硬质团块相比，发现流化床附聚过程可生产硬质小麦的团块。讨论了有关水文纹理方法的结果，为了更好地了解过程，结构和属性之间的机制和关系。湿团聚体的生长有两个主要的聚集机制：分形结构化过程和随后的致密化现象。通过研究致密性，直径和水含量的演变，证明了颗粒间的排列导致了膨胀，随后是湿团聚物的致密化。提出了一种关系来描述硬质小麦粗粉的湿附聚物在流化床中的生长。直径和水含量，证明了颗粒间的排列导致了膨胀，接着是湿团聚体的致密化。提出了一种关系来描述硬质小麦粗粉的湿附聚物在流化床中的生长。直径和水含量，证明了颗粒间的排列导致了膨胀，接着是湿团聚体的致密化。提出了一种关系来描述硬质小麦粗粉的湿附聚物在流化床中的生长。