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.

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.

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.

A mold simulator for the continuous casting of steel: Part I. The development of a simulator

2005 ◽  
Vol 36 (3) ◽  
pp. 355-371 ◽  
Author(s):  
A. Badri ◽  
T. T. Natarajan ◽  
C. C. Snyder ◽  
K. D. Powers ◽  
F. J. Mannion ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Steel Part ◽  
Continuous Casting Of Steel

Influence of the configuration of the submerged entry nozzle inner channel and electromagnetic effect within its length on the qualitative distribution of metal flows during continuous casting of steel

2021 ◽  
pp. 17-22
Author(s):  
A. Yu. Tretyak ◽  
◽  
Qiang Wang ◽  
Chun-Lei Wu ◽  
E. I. Shifrin ◽  
...  
Keyword(s):  
Quality Control ◽  
Continuous Casting ◽  
Submerged Entry Nozzle ◽  
Electromagnetic Stirring ◽  
Continuous Casting Of Steel ◽  
Electromagnetic Effect ◽  
Inner Surface ◽  
Continuously Cast ◽  
Inner Channel ◽  
Research Show

Today, the most promising and effective method of quality control of the continuously cast billets is electromagnetic stirring of the melt. In this case, an important component is the effect of the stirring on the jet in the nozzle. Moreover, as research has shown, this method is highly dependent on the configuration of the inner channel of the nozzle. Research have shown that positive or negative taper of the inner surface of the nozzle allows to obtain different results after applying EMS. Taper control completely changes the pattern of the melt flow and its deceleration in the mold, especially when it is casting of large billets. The results of the research show that minor changes in the taper of the nozzle significantly increase the effect of EMS implementation, which is observed already at 0.27 % of positive the taper and increases to 0.54%.

Sign in / Sign up

Export Citation Format

Share Document