Mathematical modeling and process simulation of perlite
• Air convective heating by the chamber walls and acceleration of air along the furnace. • Momentum transfer to the perlite grain by all exerted forces during its The novel expanded perlite particles have superior properties, namely significantly increased compression strength, size (PDF) Structural and physical characteristics of fine
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CFD MODELLING OF VERTICAL ELECTRICAL FURNACE
Expanded perlite is widely used in construction and manufacturing industry mainly due to its good thermal and acoustical There are a few published studies dealing with the modeling of vertical gas- or oil-fired and electrical furnace, and the expansion of perlite, including CFD modeling. Full article: Modelling the Thermal Treatment and Expansion of
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Production of durable expanded perlite microspheres
Conventionally, perlite expansion is performed in vertical gas-fired furnaces; the conventional perlite expansion process has On industrial scale the perlite expansion is mainly conducted in vertical gas-fired furnaces, consisting of a vertical expansion chamber with a direct flame at its bottom-end IOP Conference Series: Materials Science and Engineering PAPER
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Structural and physical characteristics of fine perlite expanded with
The expansion conditions directly affect perlite characteristics and its suitability for Structural and physical characteristics of fine perlite expanded with a novel method in a The vertical electric expansion furnace (VEF), designed and constructed in the Laboratory of Metallurgy at the National Technical University of Athens, consists of Mathematical modeling and process simulation of perlite grain
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Numerical Simulation and Experimental Validation of the
A computational code has been developed based on a Eulerian–Lagrangian approach in order to model the combustion and the motion of perlite particles in a vertical A new perlite expansion process has been designed and a vertical electrical furnace for perlite expansion has been constructed in our laboratory to overcome these drawbacks: Mathematical modeling and simulation of perlite grain expansion
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Panagiotis M. Angelopoulos Google Scholar
PM Angelopoulos, DI Gerogiorgis, I Paspaliaris. Industrial & Engineering Chemistry Research 52 (50), 17953-17975.,2013. 27. 2013. Structural and physical characteristics of fine perlite expanded with a novel method in a vertical electric furnace. PM Angelopoulos, C Maliachova, K Papakonstantinou, M Taxiarchou,To overcome these established drawbacks, a new perlite expansion process has been designed on the basis of a vertical electrically heated expansion furnace. The novel furnace enables precise control of experimental conditions, in order to allow for efficient adjustment of particle residence time and internal temperature.Mathematical modeling and process simulation of perlite grain expansion
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Mathematical modeling and process simulation of perlite grain expansion
In order to overcome the disadvantages of the conventional expansion process and to produce high quality expanded perlite, a new expansion process has been developed based on the use of a verticalFine closed structure expanded perlite produced by a novel vertical electric furnace, developed at the school of Mining and Metallurgical Engineering of the National Technical University of Athens(PDF) Structural and physical characteristics of fine perlite expanded
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Production of durable expanded perlite microspheres in a Vertical
5 perlite samples were subjected to expansion both in the new VEF and in the conventional vertical gas-fired furnace, under various temperature and air feeding rate conditions, summarised in Table 2.A new perlite expansion process has been designed and a vertical electrical furnace for perlite expansion has been constructed in our laboratory in order to overcome these drawbacks, enablingDynamic modeling and sensitivity analysis of perlite grain expansion
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IOP Conference Series: Materials Science and Engineering PAPER
On industrial scale the perlite expansion is mainly conducted in vertical gas-fired furnaces, consisting of a vertical expansion chamber with a direct flame at its bottom-end directing a forced air flow upwardly [4,5]. Although this technique is in use for more than 50 years, it Conventional perlite expansion suffers shortcomings which compromise its viability and the adherence of expanded perlite to modern high-quality technical specifications. A new perlite expansion process has been designed and a vertical electrical furnace for perlite expansion has been constructed in our laboratory to overcome drawbacks.(PDF) Modeling expanded perlite production in a vertical
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Edinburgh Research Explorer
Keywords: Perlite expansion, vertical electrical furnace, dynamic modeling, process simulation, sensitivity analysis. Relevant Congress Topics: Simulation, Control & Modeling in Mineral Processing, Processing of Industrial Minerals. INTRODUCTION Perlite is a natural occurring volcanic siliceous rock whichConventional perlite expansion suffers certain well-known shortcomings compromising its viability and the adherence of expanded perlite to modern technical specifications for high-quality insulation materials. A new perlite expansion process has been designed and a vertical electrical furnace for perlite expansion has been constructed to overcome such [PDF] MODEL-BASED OPTIMIZATION OF PERLITE EXPANSION
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Perlite expansion process and apparatus therefor Google Patents
The process and apparatus of this invention will be best understood by reference to the drawing. The central component of the system is perlite expansion chamber 2 which, as shown in its preferred form, is a vertical, generally cylindrical chamber containing an inlet port 4 at the bottom and an outlet port 6 at the top.Conventional perlite expansion is usually accomplished by feeding ground, pre-sized perlite ore into a vertical furnace heated by a direct gas flame at its bottom end, thus directing forced air flow upwardly: ore particles are (PDF) Model-based optimization of perlite
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perlite: Topics by Science.gov
In order to overcome the drawbacks of the conventional expansion technique, a new perlite expansion process has been designed based on a vertical electrical furnace (VEF). In the current study, fine perlite samples (-150 μm) from Milos Island, Greece, were expansed in the novel VEF and a conventional gas-fired furnace The invention herein also comprises an improved perlite expansion apparatus which can utilize vaporized heavy liquid fuel for combustion, wherein perlite granules are expanded by rapid heating in a flame zone in an expansion chamber (preferably vertical), in which air and fuel generate the flame zone and in which the perlite after expansion is conveyed Perlite expansion process and apparatus therefor Johns
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Energy efficient perlite expansion process Manville Service
The process of this invention can be best understood by reference to the drawings. Considering first FIG. 1, the central piece of apparatus of the perlite expansion unit illustrated is perlite expansion chamber 2. This is shown as a generally cylindrical vertical vessel commonly standing some 10 to 30 ft (3 to 9 m) high.Conventional perlite expansion suffers shortcomings which compromise its viability and the adherence of expanded perlite to modern high-quality technical specifications. A new perlite expansion process has been designed and a vertical electrical furnace for perlite expansion has been constructed in our laboratory to overcome drawbacks.(PDF) Modeling expanded perlite production in a vertical electrical
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(PDF) Expanded perlite commercialization techno-economic analysis in
process with a vertical stationary expansion furnace, an expanded perlite product will be obtained. A new dynamic model for perlite grain expans ion has been developed for furnace optimiz ation [6,7].A computational code has been developed based on a Eulerian–Lagrangian approach in order to model the combustion and the motion of perlite particles in a vertical expansion furnace. The expansion of a single particle, which takes place during its motion in the furnace, has been modeled by taking into account the perlite chemical composition and Numerical Simulation and Experimental Validation of the
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Energy efficient perlite expansion process (Patent) OSTI.GOV
@article{osti_6465740, title = {Energy efficient perlite expansion process}, author = {Jenkins, K L}, abstractNote = {A thermally efficient process for the expansion of perlite ore is described. The inlet port and burner of a perlite expansion chamber (Preferably a vertical expander) are enclosed such that no ambient air can enter the chamber.T1 Model-based sensitivity analysis and experimental investigation of perlite grain expansion in a vertical electrical furnace. AU Angelopoulos, Panagiotis. AU Gerogiorgis, Dimitrios. AU Paspaliaris, Ioannis. PY 2013/12/18. Y1 2013/12/18.Model-based sensitivity analysis and experimental investigation of
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