Haiyan Liu , Xianmei He , Lingyu Wu , Qiang Liu , Xiaoxuan Fan , Xuefei Lu
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引用次数: 0
Abstract
In engineering applications, multi-compartment silos are employed to store and distribute various types of cement efficiently. In this paper, a three compartment silo with a diameter of 25 m and a height of 50 m is taken as the prototype. Based on it, two silo models are designed: a flat - bottomed model (Model 1) and an inverted cone bottomed model (Model 2). Both models have a diameter of 1 m and a height of 2 m. Cement static-discharging tests were carried out. The results showed that the deviation of static lateral pressure from Janssen's theory after fitting the two models was less than 10 %. Model 2 shows greater material inhomogeneity. During discharging, the lateral pressure peaks exhibit no obvious pattern, and a significant percentage of the lateral pressure peaks occur during the mass flow phase (98.8 % for Model 1 and 97.4 % for Model 2). Analyzing discharge side pressures using over-pressure coefficients has limitations. The revised lateral pressure formulas for three - compartment silos according to Chinese, European, and American standards are presented, and a lateral pressure calculation model is established.
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.
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