The Influence of Slenderness Ratios of Multi-Hole Ceramic Filters from SF - 1.67 to SF - 8.36 of Filter Surface on Efficiency of Liquid Steel Refining from Non-Metallic Phase

2013 ◽  
Vol 212 ◽  
pp. 205-208 ◽  
Author(s):  
Krystian Janiszewski ◽  
Bożena Gajdzik ◽  
Andrzej Wyciślik
Keyword(s):  
Liquid Steel ◽  
Slenderness Ratio ◽  
Filter Material ◽  
Metallic Phase ◽  
Ceramic Filter ◽  
Process Efficiency ◽  
Ceramic Filters ◽  
Filter Surface ◽  
Theoretical Assumptions ◽  
Steel Refining

We propose in this publication the introduction of new, additional definition describing the multiple orifice ceramic filters used in research works on the liquid steel filtrations, calling this the filter slenderness ratio. In order to confirm the theoretical assumptions we have performed a series of the laboratory scale experiments (for the filter slenderness ratio SF - 1.67 to SF - 8.36). The influence of the filter slenderness on the filtration process efficiency has been determined through variations in quantities and surface shares of the non-metallic phase in the filtrated steel in relation to the non-filtered steel. We present also the results of researches on the separating surfaces between the liquid steel and the ceramic filter material, which in form of photos and scanning microscope microanalyses are put together in the publication.

Influence of Slenderness Ratios of a Multi-Hole Ceramic Filters at the Effectiveness of Process of Filtration of Non-Metallic Inclusions from Liquid Steel

2012 ◽  
Vol 57 (1) ◽  
pp. 135-143 ◽  
Author(s):  
K. Janiszewski
Keyword(s):  
Liquid Steel ◽  
Slenderness Ratio ◽  
Ambient Air ◽  
Negative Influence ◽  
Argon Atmosphere ◽  
Ceramic Filter ◽  
Ceramic Filters ◽  
Air Atmosphere ◽  
Metallic Inclusions ◽  
Steel Refining

Influence of Slenderness Ratios of a Multi-Hole Ceramic Filters at the Effectiveness of Process of Filtration of Non-Metallic Inclusions from Liquid SteelThe paper presents the results of investigations of the process of filtration of solid non-metallic inclusions from liquid steel with use of multi-hole ceramic filters (filtrating surfaces) characterised by a varying slenderness ratios. In order to eliminate the negative influence of the ambient air atmosphere the investigations have been carried out under a protective argon atmosphere. The experimental results obtained have proved earlier suggestions of papers [9-12] about the negative influence of ambient air atmosphere, as well as the essential influence of slenderness ratio of the used multi-hole ceramic filter at the increase of effectiveness of the liquid steel refining processes carried out through steel filtration.

Effect of divalentversusmonovalent cations on the MS2 retention capacity of amino-functionalized ceramic filters

2018 ◽  
Vol 20 (16) ◽  
pp. 11215-11223 ◽  
Author(s):  
J. Bartels ◽  
N. Hildebrand ◽  
M. Nawrocki ◽  
S. Kroll ◽  
M. Maas ◽  
...  
Keyword(s):  
Ceramic Filter ◽  
Retention Capacity ◽  
Ceramic Filters ◽  
Filter Surface ◽  
Salt Ions

Our work shows how salt ions influence the accessibility and orientation of an aminosilane on a ceramic filter surface.

Simulation of Oxygen and Nitrogen Removal from Steel by Means of Titanium and Aluminum

2011 ◽  
Vol 56 (3) ◽  
pp. 635-644 ◽  
Author(s):  
J. Iwanciw ◽  
D. Podorska ◽  
J. Wypartowicz
Keyword(s):  
Chemical Composition ◽  
Computer Program ◽  
Titanium Oxide ◽  
Nitrogen Removal ◽  
Liquid Steel ◽  
Variable Temperature ◽  
Metallic Phase ◽  
Parallel Analysis ◽  
Titanium Nitrides ◽  
Steel Refining

Simulation of Oxygen and Nitrogen Removal from Steel by Means of Titanium and Aluminum Authors' computer program was employed in the simulation of the course of steel refining by means of simultaneously used aluminium and titanium. The mass and chemical composition of liquid steel and non-metallic precipitates, were calculated at constant or variable temperature. The influence of assumed nitrides form on the results of simulation was determined. Nitrides may be considered either as separate phases or as the components of non-metallic solution. The stoichiometry of titanium oxide obtained also influences the results of simulation. Parallel analysis of steel refining was carried out with the use of FactSage program. As a result of calculations the subsequent states of equilibrium between steel and non-metallic phase were determined. It was found that aluminium and titanium nitrides may exist only as the components of oxide-nitride solution, not as separate phases.

Fabricating of Diatomite Based Ceramic Water Filter by a Novel Casting Method

2014 ◽  
Vol 91 ◽  
pp. 48-53 ◽  
Author(s):  
Umit Engin Anil ◽  
Ebru Al ◽  
Kagan Kayaci ◽  
Ferhat Kara
Keyword(s):  
Filter Material ◽  
Raw Material ◽  
Ceramic Filter ◽  
Gelling Agent ◽  
Casting Method ◽  
Forming Process ◽  
Ceramic Filters ◽  
Microbiological Test ◽  
Water Filter ◽  
Gel Casting

In this study, a ceramic water filter with micron sized pores was developed based on diatomite raw material. The slip with diatomite earth which has tubular shaped particles was prepared by using agar. Agar is a gelatinous material derived from sea alges and used as a gelling agent in order to form ceramic filters by gel casting method. Rheology of the slip was investigated by rheometry. In the forming process, polymer and metal molds were used instead of plaster molds. After de-molding, ceramic filter samples were dried and fired at 1200 °C/ h for 2 hours. Density, phase analysis and microstructure properties of porous diatomite based filter material were measured and characterized by He picnometer, XRD and SEM, respectively. Water filtration performance and microbiological test results were also investigated.

Refining of Liquid Steel in a Tundish Using the Method of Filtration During its Casting in the CC Machine

2013 ◽  
Vol 58 (2) ◽  
pp. 513-521 ◽  
Author(s):  
K. Janiszewski
Keyword(s):  
Liquid Steel ◽  
Ceramic Filter ◽  
Industrial Scale ◽  
Ceramic Filters ◽  
Industrial Environment ◽  
Steel Making ◽  
Secondary Pollution ◽  
Metallic Inclusions ◽  
Positive Results

Hitherto existing investigations concerning the ceramic filter use in the steel making processes (both of laboratory and industrial scale) have given good results. The obtained results of filtration (in the industrial) have proved that this method may be used as an effective and cheap way of steel filtration from non-metallic inclusions. Placing filters in the tundish is the best location in consideration of limiting the possibility of secondary pollution of steel. Yet, the results presented in this paper, of an experiment prepared and carried out in the industrial environment, are the only positive results obtained, which are connected with so much quantities of liquid steel processed with use of the multi-hole ceramic filters.

Antibacterial silver-diatomite nanocomposite ceramic with low silver release

2019 ◽  
Vol 20 (2) ◽  
pp. 633-643
Author(s):  
Xiaopeng Qi ◽  
Junwei Chen ◽  
Qian Li ◽  
Hui Yang ◽  
Honghui Jiang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Water Treatment ◽  
Photoelectron Spectroscopy ◽  
Bactericidal Effect ◽  
Ceramic Filter ◽  
Ceramic Filters ◽  
X Ray ◽  
E Coli ◽  
Point Of Use ◽  
Silver Release

Abstract There is an urgent need for an effective and long-lasting ceramic filter for point-of-use water treatment. In this study, silver-diatomite nanocomposite ceramic filters were developed by an easy and effective method. The ceramic filters have a three-dimensional interconnected pore structure and porosity of 50.85%. Characterizations of the silver-diatomite nanocomposite ceramic filters were performed using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Silver nanoparticles were confirmed to be formed in situ in the ceramic filter. The highest silver concentration in water was 0.24 μg/L and 2.1 μg/L in short- and long-term experiments, indicating very low silver-release properties of silver-diatomite nanocomposite ceramic filter. The nanocomposite ceramics show strong bactericidal activity. When contact time with Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) of 105 colony forming units (CFU)/mL exceeded 3 h, the bactericidal rates of the four different silver content ceramics against E. coli and S. aureus were all 100%. Strong bactericidal effect against E. coli with initial concentration of 109 CFU/mL were also observed in ceramic newly obtained and ceramic immersed in water for 270 days, demonstrating its high stability. The silver-diatomite nanocomposite ceramic filters could be a promising candidate for point-of-use water treatment.

scholarly journals Experimental investigation of the parameters of water solution purposes by ceramic, coal filters and reverse-osmotic module

2019 ◽  
pp. 30-33
Author(s):  
S.V. Gulienko
Keyword(s):  
Reverse Osmosis ◽  
Water Solution ◽  
Ceramic Filter ◽  
Main Process ◽  
Working Pressure ◽  
Ceramic Filters ◽  
Quality Of Water ◽  
Urgent Task ◽  
Wide Range ◽  
Series Of Experiments

The urgent task is to research in detail the possibilities of operation of the reverse osmosis membrane in the conditions of changing various parameters, which include, first of all, the working pressure, the initial concentration of the cleaning solutions, as well as the working conditions and the complete set of cleaning stands with auxiliary filters: mechanical, ceramic and carbon, which improves the quality of water and increases the life of high-value reverse osmosis modules. Particular attention was paid in this series of experiments to the role of ceramic filters, since in the previous series of experiments the concentration of the solution did not change both after mechanical and after carbon filters. Therefore, it was decided to modernize the stand and use a ceramic filter in the flow chart. In this work the detailed scheme of bench-scale setup with using of ceramic and carbon filters and also reverse-osmosis module is represented. The experimental reseaches of purification of NaCl water solutions were carried out in wide range of concentrations (0,2∙10-3…6,5 g/l) and working pressures (0,2…0,65 MPa). The comparative characteristics of main process parameters with and without ceramic filter are represented. The experiments were carried out on a laboratory stand for complex purification of aqueous solutions by microfiltration, adsorption and reverse osmosis using the following process steps carried out in the respective apparatus.

Thermodynamic Analysis of Liquid Steel Refining by Complex La–Ce–Al-Based Alloy

2020 ◽  
Vol 50 (4) ◽  
pp. 234-242
Author(s):  
G. G. Mikhailov ◽  
L. A. Makrovets ◽  
O. V. Samoilova
Keyword(s):  
Thermodynamic Analysis ◽  
Liquid Steel ◽  
Steel Refining

Determination of Fracture Mechanical Properties of Carbon Bonded Alumina Using Miniaturized Specimens

2016 ◽  
Vol 713 ◽  
pp. 70-73 ◽  
Author(s):  
H. Zielke ◽  
Martin Abendroth ◽  
Meinhard Kuna
Keyword(s):  
Mechanical Properties ◽  
Filter Material ◽  
Mechanical Tests ◽  
Ceramic Foam ◽  
Ceramic Filter ◽  
Tensile Fracture ◽  
Displacement Curve ◽  
Punch Test ◽  
New Generation ◽  
Filter Structures

Open cell ceramic foam filters are utilized to reduce non-metallic inclusions during casting of metals and therefore to enhance the quality of cast parts. A new generation of multifunctional filters made of carbon bonded alumina (Al2O3-C) has been developed within the scope of the collaborative research center CRC 920 [1]. The assessment of the resistance against high thermal and mechanical loads requires a mechanical characterization of the ceramic filter material. The mechanical properties show a distinctive size dependency, that’s why the specimen dimensions should be similar to the strut size of the real filter structures. The tensile fracture behavior is investigated by means of the Small Punch Test (SPT) using miniaturized disk-shaped specimens. During the mechanical tests a load-displacement curve is measured until failure occurs and a fracture stress is calculated from the experimental results. An estimation about the failure probability by means of Weibull statistics is performed because of the large scatter of the strength of the material. Furthermore, a modified version of the SPT, the so called Ball On Three Balls Test (B3B), is applied and compared to the SPT. In a final step numerical simulations of the B3B tests are performed by means of the finite element method to identify fracture mechanical material parameters like the fracture toughness.

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