The Precipitation Chemistry and Performance of the Akita HEMATITE Process - An Integrated Laboratory and Industrial Scale Study

2013 ◽  
pp. 1657-1674 ◽  
Author(s):  
Terry C. Cheng ◽  
George P. Demopoulos ◽  
Yutaka Shibachi ◽  
Hitoshi Masuda
Keyword(s):  
Precipitation Chemistry ◽  
Industrial Scale ◽  
And Performance

Space Truss Structures: Typological Characteristics and Principal Construction Systems in Italy

1994 ◽  
Vol 9 (4) ◽  
pp. 191-200 ◽  
Author(s):  
Giuseppe Prete
Keyword(s):  
Performance Characteristics ◽  
Truss Structures ◽  
Industrial Scale ◽  
Structural Systems ◽  
Functional Architecture ◽  
Space Truss ◽  
Industrial Buildings ◽  
And Performance

In the field of civil and industrial buildings and, particularly, dealing with coverings of wide areas, space truss structures are spreading more and more. Modern tridimensional steel systems are made up to the modular aggregation of standardized structural single or multiple elements, coordinated in space in accordance with rational geometric criteria, mass produced on an industrial scale and designed for a fine and functional architecture. Concerning these structures, the paper presents basic qualitative and performance characteristics, main typologies for the applications and, lastly, some among the most significant structural systems patented by Italian production.

scholarly journals CFD Study on the Physical Behavior of Flue Dust in an Industrial-Scale Copper Waste Heat Boiler

2021 ◽  
Author(s):  
Amélia Schmidt ◽  
Victor Montenegro ◽  
Markus Reuter ◽  
Alexandros Charitos ◽  
Michael Stelter ◽  
...  
Keyword(s):  
Waste Heat ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Industrial Scale ◽  
Waste Heat Boiler ◽  
Particle Sedimentation ◽  
Physical Behavior ◽  
Flue Dust ◽  
Flash Smelting Furnace ◽  
And Performance

AbstractThe Flash Smelting Furnace (FSF) is one of the most common reactors for the primary smelting of copper concentrates. Its smooth operation depends on the availability and performance of the downstream Waste Heat Boiler (WHB). The WHB is especially sensitive to problems with its flue dust handling, such as the formation of accretions, which can lead to downtime and equipment failures. Due to the limited accessibility and the harsh conditions of the WHB, experimental studies are challenging. Therefore, CFD simulations can be a promising option to increase knowledge and evaluate a range of options. The present study investigates the physical behavior of flue dust in an industrial-scale WHB via a three-dimensional CFD model. Size-dependent particle sedimentation and the risk areas for flue dust accretions are predicted, finding good agreement with industrial experience and data from the literature. To make the evaluation of accretion risk zones possible, a new sticking function for flue dust is developed. The results are validated against dust samples. Finally, operational recommendations for minimizing flue dust accretions are derived.

Optimization and Performance of Silica-Based Media for Industrial-Scale Antibody Purification

2011 ◽  
Vol 35 (1) ◽  
pp. 157-160 ◽  
Author(s):  
H. Miyahara ◽  
R. Nakashima ◽  
M. Inoue ◽  
T. Katsuda ◽  
H. Yamaji ◽  
...  
Keyword(s):  
Industrial Scale ◽  
Antibody Purification ◽  
And Performance ◽  
Optimization And Performance

Development and Performance of a New Annular Centrifugal Contactor for Semi‐Industrial Scale

2005 ◽  
Vol 40 (9) ◽  
pp. 1871-1883 ◽  
Author(s):  
Wuhua Duan ◽  
Chongli Song ◽  
Qiulin Wu ◽  
Xiuzhu Zhou ◽  
Jiazhen Zhou
Keyword(s):  
Industrial Scale ◽  
And Performance ◽  
Centrifugal Contactor

Culture of PRJ-1 Demulsifying Bacteria and Performance Evaluation

2011 ◽  
Vol 356-360 ◽  
pp. 2055-2059
Author(s):  
Qing Wang Liu ◽  
Yong Kun Zhang ◽  
Xu Dong Lei ◽  
Yong Hui Zhang
Keyword(s):  
Performance Evaluation ◽  
Crude Oil ◽  
Production Cost ◽  
Carbon Sources ◽  
Industrial Scale ◽  
Waste Oil ◽  
Cell Concentrations ◽  
And Performance ◽  
Water Cut ◽  
Demulsification Efficiency

Bio-demulsifier has not been applied in industrial scale due to its production cost. In order to reduce the production cost and improve the efficiency of demulsification, cheap materials such as oilfield sludge, workshop waste oil and edible waste oil were used in experiments as carbon sources to culture PRJ-1 demulsifying bacteria. As a result, cell concentrations of 5.4g/L, 3.7g/L and 4.2g/L were gotten, which were higher than the concentration of 2.6g/L cultivated by using paraffin. PRJ-1 demulsifying bacteria were used to prepare the demulsifying solution with a concentration of 10g/L, which was used in the demulsification experiment on Liaohe crude oil with a water cut of 80%. With 100 ml/L being added into the crude oil, the demulsification efficiency at 12h reached 91%, which was higher than that of 100mg/L chemical demulsifier. Demulsification efficiency of 96% can be achieved by using the combination of 60ml/L demulsifying bacteria and 40mg/L chemical demulsifier, furthermore, the demulsifying speed was higher and dehydrated water was clearer.

Transmission Scanning Electron Microscopy and Energy Analysis with the Siemens ELMISKOP 101

1972 ◽  
Vol 30 ◽  
pp. 450-451
Author(s):  
H. M. Thieringer
Keyword(s):  
Objective Lens ◽  
Transmission Microscopy ◽  
Image Recording ◽  
Mode Of Operation ◽  
Scanning Transmission ◽  
Electron Microscopes ◽  
And Performance ◽  
Convergent Beam ◽  
Ray Path ◽  
Beam Diffraction

It has repeatedly been show that with conventional electron microscopes very fine electron probes can be produced, therefore allowing various micro-techniques such as micro recording, X-ray microanalysis and convergent beam diffraction. In this paper the function and performance of an SIEMENS ELMISKOP 101 used as a scanning transmission microscope (STEM) is described. This mode of operation has some advantages over the conventional transmission microscopy (CTEM) especially for the observation of thick specimen, in spite of somewhat longer image recording times.Fig.1 shows schematically the ray path and the additional electronics of an ELMISKOP 101 working as a STEM. With a point-cathode, and using condensor I and the objective lens as a demagnifying system, an electron probe with a half-width ob about 25 Å and a typical current of 5.10-11 amp at 100 kV can be obtained in the back focal plane of the objective lens.

Angular Resolved Electron Spectroscopy with Parallel Recording

1990 ◽  
Vol 48 (2) ◽  
pp. 370-371
Author(s):  
Huang Min ◽  
P.S. Flora ◽  
C.J. Harland ◽  
J.A. Venables
Keyword(s):  
Electron Spectroscopy ◽  
Low Voltage ◽  
Solid Angle ◽  
Detection System ◽  
Voltage Electron ◽  
Cylindrical Mirror ◽  
Inner Radius ◽  
Channel Plate ◽  
And Performance ◽  
Type Detector

A cylindrical mirror analyser (CMA) has been built with a parallel recording detection system. It is being used for angular resolved electron spectroscopy (ARES) within a SEM. The CMA has been optimised for imaging applications; the inner cylinder contains a magnetically focused and scanned, 30kV, SEM electron-optical column. The CMA has a large inner radius (50.8mm) and a large collection solid angle (Ω > 1sterad). An energy resolution (ΔE/E) of 1-2% has been achieved. The design and performance of the combination SEM/CMA instrument has been described previously and the CMA and detector system has been used for low voltage electron spectroscopy. Here we discuss the use of the CMA for ARES and present some preliminary results.The CMA has been designed for an axis-to-ring focus and uses an annular type detector. This detector consists of a channel-plate/YAG/mirror assembly which is optically coupled to either a photomultiplier for spectroscopy or a TV camera for parallel detection.

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