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EURO 120

Metalurgia

INTERNATIONAL

English version, published by

romanian metallurgical foundation

Honorary president of scientific publishing house f.m.r.

Dr. ec. Lepădatu v. gheorghe

vol. IX

(2004)

no.2

romanian metallurgical foundation

Scientific publishing house

scientific board staff

Professor AVRAM NICOLAE Ph. D.

professor Costin Scorţea Ph. D

Managing Director:

Professor Costin Scorţea Ph. D.

Editor-in-chief:

Professor Nicolae Avram Ph. D.

Manager Scientific Publishing House F.M.R.:

eng. Florentina Brânduşa Scorţea

Contents

Issn 1582 – 2214

Avram Nicolae, Vasile Şerban: Algorithms for the theoretical forecasting of the dust amounts generated during the metallurgical processes ……3

Marian Bordei, Aurel Ciurea, Dinel Tănase: Solidification and deformation of the thin continuous casting slabs ……………………..6

Aurel Ciurea, Marian Bordei, Dinel Tănase: Considerations regarding the hot upsetting of the nodular graphite cast iron ………………...11

Gheorghe Iorga, Ştefan Stan, Cornel Chiriac, Marian Ionescu: Technological experiments regarding the improvement of the tool steels cleanliness using the slag properties and the chemical heating ……………………………………………….16

? Press release ……..……………..……...…...…………...............… I – VII

? Instruction for preparing abstruct of ISIJ-meeting ……………………VIII-XI

?Romanian society of biomaterials (Selection of papers presented during the symposium held between 20^th and 22^nd of November 2003 at „dunărea de jos” university, galaţi, românia)………….….…XII-XX

?New books, published by romanian metallurgical foundation……..XXI-XXII

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The Editor – in – Chief

abstract

metalurgia International 2/2004

D.C.: 574

Avram Nicolae, Vasile Şerban: Algorithms for the theoretical forecasting of the dust amounts generated during the metallurgical processes

Metalurgia International (vol.IX), no.2, 2004, p. 3

The analysis of the engineers concerns in the field of pollution prevention and control emphasises that:

v an increased attention is paid to the downstream metallurgical processes (the emissions identification, measuring and dispersion and also the secondary materials recovering);

v there are not planned researches concerning the emissions generation in the metallurgical processes area.

Having in view the aforesaid, the authors consider that the following measures have to be taken:

· to spare no efforts for the ecological prophylaxis, which is based, among other things, on the knowledge of the theory of polluting emissions generation in the industry;

· the establishment of the mathematical tools necessary to forecast the amount of emissions generated during the basic metallurgical processes and the auxiliary operations.

D.C.: 669-412; 621.79.097

Marian Bordei, Aurel Ciurea, Dinel Tănase: Solidification and deformation of the thin continuous casting slabs

Metalurgia International (vol.IX), no.2, 2004, p. 6

D.C.: 669.131; 622.

Aurel Ciurea, Marian Bordei, Dinel Tănase: Considerations regarding the hot upsetting of the nodular graphite cast iron

Metalurgia International (vol.IX), no.2, 2004, p.11

D.C669-91

Gheorghe Iorga, eng. Ştefan Stan, Cornel Chiriac, Marian Ionescu: Technological experiments regarding the improvement of the tool steels cleanliness using the slag properties and the chemical heating

Metalurgia International (vol.IX), no.2, 2004, p. 16

The paper presents the technological solution tested and applied at the No. 1 steel-shop in Târgovişte aiming to improve the cleanliness indicators of some tool alloyed steels.

This steelshop was specialized from the ‘70s for that kind of manufacturing but it was not updated during the last 15 years. As a result, the performances, especially in those concerning the cleanliness indicators, were modest, being impossible to satisfy the customer’s requests.

The main objectives to be attended were:

- decrease of S content below 100 ppm;

- lowering the inclusions content in accordance with more severe ASTM limits.

Using the existent equipment (a classical electric furnace and a VOD installation) we intended to obtain a particular slag composition (in the system CaO-Al₂O₃-SiO₂) and to use it in an efficient manner (for desulphurization and inclusions control), having in mind the simultaneity with the processes like aluminothermic heating or vacuumation.

The obtained qualitative results were good but was registered an increasing of the ingot production cost by 1,25 USD/t.

Romanian Metallurgical Foundation

Scientific Publishing House