română ROXANA PĂTRAŞCU, GEORGE DARIE, ADRIAN VOLCEANOV, BOGDAN ALEXANDRU SAVA, MIHAI ELIŞA, ADINA STĂNCULEA
Abstract
The present article is an integrated approach of energetic efficiency in the field of glass manufacturing industry as well as the reduction of its environment impact. In the same time, this article is targeting an improvement of energetic and economic efficiency, a reduction of the environment impact (CO2, NOX, SO2 and dust emissions) and new equipment implementation in the field of glass manufacturing industry in Romania. This article takes also in consideration the consequences of the glass waste recycling.
As a result of the present model, complex appraisal methodologies of energetic efficiency, environmental impact and economic efficiency as well as new clean technologies will be available for the Romanian glass manufacturing domain.
In this way, Romanian glass industry will be able to reach European efficiency and environment standards. Emissions reduction, especially CO2, will create appropriate conditions to implement the main Kyoto Agreement measures.
New methodologies techniques and technologies (solutions, equipments, etc) and also the new developed evaluation models might have a replication potential for other industrial branches.
Keywords
glass technology, environment, efficiency, equipment
DOREL RADU, VASILICA DIMA, MIHAI EFTIMIE
Abstract
The paper deals with an important technological aspect regarding vitreous materials: to determine the optimal composition for glass fibres with low biopersistence and with high chemical stability in service.
To reach this goal, in the first part of the study, according with requirements of a systemic approach, a technologic characterisation of these fibre types is made. Also the properties of interest (chemical stability, dissolution rate of the fibres) are selected based on fixed points of viscosity, both in terms of production technology and the glasses behaviour in different fields of use.
Keywords
Glass fibers, optimal design, low biopersistence
DOREL RADU, VASILICA DIMA, MIHAI EFTIMIE
Abstract
Present paper deals with a mathematical programming model applied to the optimal design of oxide composition for glass fibres with low biopersistence.
The developed general model is applied on two case studies.
In the first case it is designed a composition for E glass type (boro-silicate glass). The result of modelling indicates a relatively low value of the carcinogenic index, KI, and therefore a high biopersistence.
In the second case study, the optimal model is applied to some glass fibres having chemical compositions in the frame of MgO-CaO-SrO-Al2O3-SiO2 oxide system.
The results of our modelling show that in this oxide system glass fibre with low biopersistence can be obtained and the values of the carcinogenic index around 39, are comparable with literature data.
Keywords
glass fibers, optimal design, low biopersistence