Innovated Construction of Tundish Cover with Increased Service Durability

2013 ◽  
Vol 58 (3) ◽  
pp. 795-801
Author(s):  
W. Stachurski ◽  
J. Łukasik ◽  
G. Kwinta ◽  
S. Sobula ◽  
Sz. Ostafin
Keyword(s):  
Continuous Casting ◽  
Flat Plate ◽  
Refractory Material ◽  
Thermal Insulation ◽  
Insulation Material ◽  
Continuous Casting Of Steel ◽  
Two Factors ◽  
Service Durability ◽  
Service Conditions ◽  
Thermal Shocks

Abstract In this study a new concept of the cover for installation for continuous casting of steel have been studied and discussed. The main essence in the most favourable construction includes the existing stresses and strains developed in service conditions. Instead of former cover, made with heat-resistant concrete and flat plate, the new solution introduced two factors: increased rigidity whole cover and new thermal insulation material. It is a composite refractory material, more light, plastic and more resistant for thermal shocks. In the final results, the new tundish cover confirmed in practice prolongation of the cover exploitation from 15-25 000 tones to above 90 000 tones poured steel.

Characterization of diatomite from Sig region (West Algeria) for industrial application

2016 ◽  
Vol 27 (3) ◽  
pp. 281-288 ◽  
Author(s):  
Hazem Meradi ◽  
L'Hadi Atoui ◽  
Lynda Bahloul ◽  
Kotbia Labiod ◽  
Fadhel Ismail
Keyword(s):  
Continuous Casting ◽  
Thermal Insulation ◽  
Exothermic Peak ◽  
Scanning Microscopy ◽  
Continuous Casting Of Steel ◽  
Content Type ◽  
Mould Powder ◽  
Different Temperatures ◽  
Microscopy Method ◽  
West Algeria

Purpose – Diatomite also known Kieselguhr, is a non-metallic mineral composed of the skeletal remains of microscopic single-celled aquatic algae called diatoms. The purpose of this paper is to test and to evaluate the diatomite of Sig region (West Algeria) to substitute the main mould powder used in continuous casting of steel for thermal insulation and lubrication. Design/methodology/approach – To assess the behavior of diatomite at different temperatures, a combination of simultaneous scanning calorimetric and thermogravimetric testing was used and to evaluate the structure of diatomite, the scanning microscopy method was applied. Findings – The results showed different endothermic and exothermic peaks, mainly at 84.7°C and 783.5°C for endothermic peaks and 894.9°C for exothermic peak. The scanning microscopy method was used and a large porosity was observed. The trial industrial in continuous casting of steel showed a weak loss temperature of steel. Originality/value – This product may be used for thermal insulation in continuous casting of steel. Also the characterization showed the hot behavior of this product with the various transformations and could give the possibility to other use.

scholarly journals On the formation of fold-type oscillation marks in the continuous casting of steel

2017 ◽  
Vol 4 (6) ◽  
pp. 170062 ◽  
Author(s):  
M. Vynnycky ◽  
S. Saleem ◽  
K. M. Devine ◽  
B. J. Florio ◽  
S. L. Mitchell ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Asymptotic Methods ◽  
Continuous Casting Of Steel ◽  
Oscillation Mark ◽  
Governing Equations ◽  
Fold Type ◽  
Parameters Analysis ◽  
Oscillation Marks ◽  
Recent Experimental Work ◽  
Type Oscillation

Asymptotic methods are employed to revisit an earlier model for oscillation-mark formation in the continuous casting of steel. A systematic non-dimensionalization of the governing equations, which was not carried out previously, leads to a model with 12 dimensionless parameters. Analysis is provided in the same parameter regime as for the earlier model, and surprisingly simple analytical solutions are found for the oscillation-mark profiles; these are found to agree reasonably well with the numerical solution in the earlier model and very well with fold-type oscillation marks that have been obtained in more recent experimental work. The benefits of this approach, when compared with time-consuming numerical simulations, are discussed in the context of auxiliary models for macrosegregation and thermomechanical stresses and strains.

scholarly journals Fungal Based Biopolymer Composites for Construction Materials

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2906
Author(s):  
Iuliana Răut ◽  
Mariana Călin ◽  
Zina Vuluga ◽  
Florin Oancea ◽  
Jenica Paceagiu ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Renewable Resources ◽  
Heat Exposure ◽  
Construction Materials ◽  
Bacterial Spores ◽  
Fungal Mycelium ◽  
Insulation Material ◽  
Construction Sector ◽  
Low Costs ◽  
Microscopy Images

Environmental contamination, extensive exploitation of fuel sources and accessibility of natural renewable resources represent the premises for the development of composite biomaterials. These materials have controlled properties, being obtained through processes operated in mild conditions with low costs, and contributing to the valorization of byproducts from agriculture and industry fields. A novel board composite including lignocelullosic substrate as wheat straws, fungal mycelium and polypropylene embedded with bacterial spores was developed and investigated in the present study. The bacterial spores embedded in polymer were found to be viable even after heat exposure, helping to increase the compatibility of polymer with hydrophilic microorganisms. Fungal based biopolymer composite was obtained after cultivation of Ganoderma lucidum macromycetes on a mixture including wheat straws and polypropylene embedded with spores from Bacillus amyloliquefaciens. Scanning electron microscopy (SEM) and light microscopy images showed the fungal mycelium covering the substrates with a dense network of filaments. The resulted biomaterial is safe, inert, renewable, natural, biodegradable and it can be molded in the desired shape. The fungal biocomposite presented similar compressive strength and improved thermal insulation capacity compared to polystyrene with high potential to be used as thermal insulation material for applications in construction sector.

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