Redacţia, administraţia: Calea Griviţei, nr.83, Sector 1, O.P. 12, Cod 010705, Bucureşti Tel.: 004 021/ 310.71.38 GSM: 0722 665 071; 0724 537 051 Fax: 004 021/ 310 71 38 E-mail: redactia@metalurgia.ro; www.metalurgia.ro Contul EDITURII ŞTIINŢIFICE F.M.R.: Lei: BCIŢ, Sucursala Rosetti, Bucureşti Cod IBAN: RO55 CBIT 4260 1037 4300 1000 USD: BCIT Sucursala rosetti, Bucureşti Cod IBAN: RO21 CBIT 4260 1037 4300 2000 Euro: BCIT Sucursala rosetti, Bucureşti Cod IBAN: RO84 CBIT 4260 1037 4300 3000 Costul unui abonament: lei 4 800 000 Copyright © 2005 EDITURA ŞTIINŢIFICĂ F.M.R. Nici un material din această revistă nu poate fi reprodus, difuzat sau folosit în orice alt mod decât cu aprobarea scrisă a editorului. Manuscrisele şi documentele nepublicate (fotografii, pliante, cărţi) expediate pe adresa redacţiei, din iniţiativa autorilor, nu se restituie. Potrivit art.206 CP, responsabilitatea juridică pentru conţinutul articolului aparţine autorului. De asemenea, în cazul unor agenţi de presă şi personalităţi citate, responsabilitatea juridică le aparţine. Reproducerea de părţi din această revistă este permisă cu acordul scris al editorului The copyright of parts from this publication is allowed with the written agreement of the editor	Metalurgia revistă fondată în 1948 Revistă editată de editura ştiinţifică f.m.r. preşedintele onorific al editurii ştiinţifice f.m.r. Dr. Ec. Lepădatu V.Gheorghe Editura Ştiinţifică F.M.R. Lei : BCIŢ, Sucursala Rosetti, Bucureşti; Cod IBAN : RO55 CBIT 4260 1037 4300 1000 USD : BCIT Sucursala rosetti, Bucureşti; Cod IBAN : RO21 CBIT 4260 1037 4300 2000 Euro: BCIT Sucursala rosetti, Bucureşti; Cod IBAN : RO84 CBIT 4260 1037 4300 3000 Cod fiscal: 9471842 Calea Griviţei, nr.83, Sector 1, O.P. 12 Cod 010705 Bucureşti Tel: 004 021/ 310.71.38; 0722 665 071;0724 537 051 Fax: 004 021/ 310.71.38 E-mail: redactia@metalurgia.ro www.metalurgia.ro Nr.5 mai 2005
preşedinTii colegiilor de redacţie Prof. dr. ing. NICOLAE AVRAM Prof. dr. ing. SCORŢEA COSTIN
colegiul onorific (în ordine alfabetică) I.Ågren (Suedia), dieter ameling (GERMANIA), borş ionel, bordea marius, chiriac cornel, chiţu gheorghe,constantin radu, dobra gheorghe, dumitrescu constantin, R. S. HOUK (S.U.A.), T.Y.Hsu (China), ioan romulus, christopher lawson (danemarca), y. matsubara (Japonia), moldovan petre, nicolae avram, D. R. J. OWEN (SWANSEA, UK), radu nicu, roşescu gheorghe (grecia), roxana ruxandra (california), sofroni laurenţie, Jean-marc saiter (franţa),tudor paul, văzdăuţeanu vasile
Preşedinte al colegiului executiv de redacţie Prof. dr. ing. SCORŢEA COSTIN Colegiul executiv Prof. dr. ing. bejan Mircea Prof. dr. ing. bunea Daniel Prof. dr. ing. cănănău nicolae Prof. dr. ing. GEORGETA COŞMELEAŢĂ Prof. dr. ing. CIUCĂ ION Prof. dr. ing. gaba aurel Prof. dr. ing. GĂLUŞCĂ DAN GELU Prof. dr. ing. hepuţ teodor Prof. dr. ing. IONIŢĂ GHEORGHE Prof. dr. ing. mănescu tiberiu Prof. dr. ing. Ripoşan Iulian Prof. dr. ing. samoilă Corneliu Prof. dr. ing. SCORŢEA COSTIN Prof. dr. ing. SIMITI IOAN VIDA Prof. dr. ing. SOFONEA GALAFTION Prof. dr. ing. Şaban Rami Corpul referenţilor ştiinţifici Prof. dr. ing. anişoara ciocan, Prof. dr. ing. Crişan Aurel, Prof. dr. ing. constantin Nicolae, Prof. dr .ing. Miloşan Ioan, Prof. dr. ing. Nagy Emil, Prof. dr. ing. Maria Nicolae, Prof. dr. ing. Tamara radu, Prof. dr. ing. Doina Răducanu, Conf. dr. ing. Semenescu Augustin, Conf. dr. ing. Vizureanu Petrică Director General Editura Ştiinţifică F.M.R. Redactor Şef. Ing. BRÂNDUŞA FLORENTINA SCORŢEA Asistent Editura Ştiinţifică F.M.R. Procesare -tehnoredactare: ANCA ION	SUMAR ISSN 0461-9579 scorŢea Costin: Unele aspecte privind un model matematic on-line de furnal ……………………………………………………………...… 5 Ecaterina MATEI, NICOLAE Avram: Calculul eficienţei de îndepărtare a poluanţilor prezenţi în apele uzate industriale pe baza bilanţurilor de ape uzate ………………………………………... 9 Ciobanu Ioan, Crişan Aurel, Munteanu Sorin Ion: Caracterizarea solidificării pieselor turnate prin modulul de solidificare real ................................................................................................. 15 Elena Chirilă, Cărăuşu Constantin, Carmen Nejneru: Contribuţii teoretice privind modelarea matematică a fenomenelor fizice la interfaţa zgură - baie metalică la topirea în cuptorul electric cu arc ……….................…………............……….… 26 VIZUREANU petrică: Impactul ecologic al procesului de ardere al combustibililor …………………………………………..… 35 Munteanu Sorin Ion, Ciobanu Ioan, Crişan Aurel: Particularităţi privind solidificarea barelor cu secţiune „U” cu deschidere mare şi foarte mare între braţele paralele ……………... 38 + Informaţii din metalurgia mondială …………….…………….…..………………...…… I + Semnalări …………………………………………...………………………………..…… II +Evenimente Internaţionale …………………...………….……..……….…… III ª Conferinţe – Expoziţii ………………………………………...………….……… III ª Al cincilea congres de ştiinţa şi ingineria materialelor ..……………………….. V + recenzie …..................................................................................................................….. VII + Cărţi apărute la Editura Ştiinţifică F.M.R ………………......…….......... IX - XI + Revista revistelor………………………………….……………………………… 8, 34, IV

abstract metalurgia 5/2005

D.C.: 669.162. 2 scorŢea Costin: Aspects regarding an on-line mathematical model for blast furnace process Metalurgia (57) 2005, nr. 5, p. 5 Blast furnace process involves complex phenomena of mass and energy transfer, developped in solid, liquid and gaseous environment, where the chemical reactions cinetics among these phases is differently influencing the process, depending on temperature, from higher values in the lower part, to lower values in the upper part, ensuring the transformation of solid phase into liquid and gaseous phases. At the same time, the gas is moving in counter-current. Both reduction phenomena (direct and indirect, and combustion involve the performance of mathematical sub-models, which by integration, become parts of a global model, allowing complex monitorisation of blast furnace process. D.C.: 574; 628. 3 Ecaterina MATEI, NICOLAE Avram: removal rate calculus of the industriale wastewaters basis on wastewater balances Metalurgia (57) 2005, nr. 5, p. 9 Quantitative description of a technological process is based on the sum of all materials that are going into, leaving, are accumulated or transformed during the process. This procedure of the sum of all materials is known as material balance and it is based on mass conservation law, bearing in mind the changes of the components due to fluid flow and chemical transformations into the system. D.C.: 621. 746. 62 Keywords: solidification module,shape factor, casting Ciobanu Ioan, Crişan Aurel, Munteanu Sorin Ion: A new concept in foundry the real solidification module for casting Metalurgia (57) 2005, nr. 5, p. 15 The authors propose a new concept to characterize the castings from the solidification view point that is named the real solidification module. It is shown that the solidification module, so that is calculated till now (the rapport between the casting volume and its contact aria with mould and cores) and called by the authors the ideal solidification module, isn’t always correlated with the solidification time of castings. For this reason there is proposed a new equation to calculate the

solidification module. This attends to the real solidification conditions of castings inside the mould. D.C.: 669. 041. 38 Elena Chirilă, Cărăuşu Constantin, Carmen Nejneru: Theoretical contributions in the mathematical modeling of the physical phenomenos which take place between slag and melting in electric arc furnace Metalurgia (57) 2005, nr. 5, p. 26 The paper presents a mathematical model of oscillations of slag-melting interface which take place between slag and melting in electric arc furnace. This model permits to reduce the energetic consumption. D.C.: 574. 662. 61; 536. 46 VIZUREANU petrică: Environmental impact of combustion process of fossil fuels Metalurgia (57) 2005, nr. 5, p. 35 The requirement of workers good health and healthy environment represents, during last year, an important problem as far as the combustion processes are concerned. In this respect combustion products are dangerous from the point of view of harmfull substances, like carbon oxyde, sulphuric anhydride (present in so-called acid rains), nitrogen oxydes, smoke particles and cancerigene substances (like aromatic hydrocarbons). In the paper, a general presentation of these substances and some recommendations are made. D.C.: 621.’746. 62; Keywords: mathematical model, solidification, simulation, casting Munteanu Sorin Ion, Ciobanu Ioan, Crişan Aurel: Particularities concerning the solidification of „U” bars with great and very great opening between parallel arms Metalurgia (57) 2005, nr. 5, p. 38 In this paper there are presented the results obtained by authors concerning the solidification of some bars with „U” section having a great distance between the parallel walls of the section. It was used the computer aided simulation method with a software based on a 2D finite differences mathematical model. The case of eutectic cast iron parts, cast in molding batch on the base of silica sand, cured with CO2, was analyzed. There were established the cooling coefficients for real solidification module calculation.