By Wolfgang Pietsch
Agglomeration is necessary to the tactics of amendment of powders, construction of composites and construction of recent fabrics that are required in prescribed drugs, meals, chemical compounds, fertilizers and agrochemicals, minerals, ceramics, metallurgy and all fabric generating industries. The binding mechanisms and the particle habit in addition to the features of the procedures and the ensuing agglomerates are a similar whether or not they are occuring within the 'ultra-clean' pharmaceutical or nutrients industries or in 'dirty' minerals or waste processing plants.
The ebook introduces the interdisciplinary method of the advance of recent ideas and the answer of difficulties. it's a entire and updated functional advisor describing a few of the agglomeration phenomena and business concepts for dimension growth. as well as introducing the houses of agglomerates and the features of the several tools, descriptions of the equipment and discussions of particular gear gains are the most topics.
The distinctive evaluate of the topic relies at the authors adventure as scholar, researcher, instructor, developer, fashion designer, seller, and person in addition to specialist and advisor within the box of agglomeration, its applied sciences and items, and is complemented through the information of affiliates who're energetic in particular parts and knowledge from owners. it truly is meant for everyone operating in industries that method and deal with particulate solids because it goals to assist comprehend and regulate undesirable agglomeration in addition to use, increase, and strengthen equipment for the helpful measurement growth through agglomeration.
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Extra resources for Agglomeration Processes: Phenomena, Technologies, Equipment
During drying the colloidal particles concentrate in diminishing liquid bridges and the pressure caused by the liquid’s surface tension compacts the colloidal particles. After complete evaporation of the liquid, solid bridges remain which are made up of colloidal particles. Adhesion in the bridges is mostly caused by molecular forces which may be enhanced by electrical and magnetic effects (see Group IV below). 5. 11. Adhesion and Cohesion Forces 1. , are applied, adhesion forces at the solid-binder interface and cohesion forces within the viscous material can be fully exploited for agglomerate strength until the weaker of the two fails.
This mechanism, called partial melting, is often responsible for unwanted agglomeration and caking of substances with low melting point or softening temperature. /4. The formation of solid bridges by chemical reaction or hardening binders depends only on the participating materials, their reactivity, and their tendency to harden. Elevated temperature and/or pressure may improve the reaction and result in a modified, potentially stronger bridge structure. These binding mechanisms are often activated by moisture.
For those reasons, the market for food additives is growing overproportionately, largely due to the increasing production of more nutritious and better balanced designer foods whereby calorie reduction agents are the largest segment. Fun foods are the wide range of modern sweets and snacks where mostly sugar and fat based binders are applied to obtain agglomerates or, for example, bar shaped products from a multitude of ingredients for the consumer martket. A more complete coverage of these fast growing technologies is far beyond the scope of this book.
Agglomeration Processes: Phenomena, Technologies, Equipment by Wolfgang Pietsch