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Dushi A.,University of Prishtina | Kongoli F.,FLOGEN Technologies Inc. | McBow I.,FLOGEN Technologies Inc. | Rizaj M.,University of Prishtina
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2013

Rubber textile conveyor belts used in underground coal mines require strong and standardized fire-resistant properties in order to guarantee the safety of the work The Purpose of this work is the optimization of the rubber ingredients which are the main factors that give flammability to conveyor belts The ingrediends taken into consideration as factors are Sb2O3 (X1), chlorinated parafins (X2) and clay (X3) The experiments were designed using central composite rotatable design (CCRD) of second order, according to the mathematical model of desirability functions The fitted responses for flammability were Spirit Burner test (Y1), Surface resistance test (Y2), and Limit oxygen index, LOI (Y3) The obtained Optimized Global solution was: X1 = 0.2889; X2 = 0.39 and X3 = -0.832, while composite desirability was 0.932 which is an efficient value for desirability Copyright © 2013 IFAC. Source

Tsymbulov L.B.,Norilsk Nickel | Pigarev S.P.,Norilsk Nickel | Kongoli F.,FLOGEN Technologies Inc. | McBow I.,FLOGEN Technologies Inc.
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2013

The Gipronickel Institute in cooperation with OJSC MMC Norilsk Nickel and Canadian Company Flogen Technologies Inc has developed a new technology for continuous converting of coppernickel mattes and copper concentrates coming from high-grade matte separation, with the production of blister copper, a slag of high copper and nickel content and gases of high SO2 concentration A two-zone Vaniukov furnace is used as a basic reactor for this process This work presents the basic control principles of this new technological process obtained through thermodynamic and experimental studies Copyright © 2013 IFAC. Source

Ibrahimi I.,University of Prishtina | Rizaj M.,University of Prishtina | Pula J.,University of Prishtina | Kongoli F.,FLOGEN Technologies Inc. | McBow I.,FLOGEN Technologies Inc.
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2013

The combined land filled quantity of the fly-ash produced by a power plant and the slag produced by a ferronickel plant amounts to 3 (three) million tons per year in Kosovo Due to environmental considerations, using this waste to produce new value-added materials constitute an efficient way to achieve waste sustainable processing Development of technological processes for producing of high performing ceramic-glasses through mixing of waste glass, fly ash and ferronickel slag has been undertaken in cooperation with Canadian company FLOGEN Fly ash from Kosovo Energy Corporation (Kosovo) and ferronickel slag from 'New Co Ferronikeli (Kosovo) (containing SiO2, CaO, MgO, FeO, Fe 2O3, MnO, P2O5, Cr2O 3, CaS, MnS, FeS as main components) and waste glass are jointly treated in order to produce a new ceramic glass with improved E-module and flexural strength (fracture) as compared to those produced by traditional aggregates Depending on the mixing of components (fly ash, slag, and waste of glass) the ceramic glass semi-products can be used for the production of silicate tiles, pipes, decorative brick wall, etc The purpose of this paper is to describe the basic control principles to achieve high performance properties based on the process parameters, treatment procedure, mixing ratios, concentrations of components Copyright © 2013 IFAC. Source

Kongoli F.,FLOGEN Technologies Inc. | McBow I.,FLOGEN Technologies Inc. | Yazawa A.,Tohoku University
High Temperature Materials and Processes | Year: 2011

The so-called "fayalite" slag, despite problems associated with it, is the most widely used slag in copper smelting processes. Thirty years ago, in order to overcomes some drawbacks of this slag a new "calcium ferrite" slag was proposed especially for continuous copper converting. Since both slags have strong and weak points depending on the field of their application about 8 years ago another new "ferrous calcium silicate" slag was proposed that is expected to solve the drawbacks of each slag. This new slag is defined as mainly consisting of FeO x, CaO and SiO 2 as its main components but it can practically have several combinations of these constituents. In order to determine the best area of this slag for possible industrial application the quantification of phase relations is an important subject. In this paper the work carried out by the authors in quantifying through an original physical model the phase relations, liquidus surface, liquidus regions, behavior of solid phases and the effect of minor components is reviewed. Several special compositions of this slag have been identified and discussed for possible applications in the industrial practice. Copyright © 2011 De Gruyter. Source

Kongoli F.,FLOGEN Technologies Inc. | McBow I.,FLOGEN Technologies Inc. | Budd R.,FLOGEN Technologies Inc. | Llubani S.,FLOGEN Technologies Inc. | Yazawa A.,Tohoku University
Journal of Mining and Metallurgy, Section B: Metallurgy | Year: 2010

The optimal operation of the blast furnace depends considerably on the properties of the sinter fed into the furnace. As a result, the optimization of the sintering processes has a direct effect on the overall effectiveness of the iron making processes. In order to produce a good sinter special care needs to be taken in order to assure it has a good permeability and reducibility and it is able to retain these properties for a certain time. If the sinter starts to melt down early in the upper part of the blast furnace, where its solid state reduction is essential, permeability decreases, the gas channels get blocked, reductibility diminishes and serious problems may also follow. Among the factors that influences the above mentioned sinter properties are the oxygen potential and fluxing components. Nevertheless, their effect on the phase relations during sintering and sinter reduction conditions has not yet entirely clarified and confusion exists in literature. This quantification becomes even more important today where many new minor components such as Al2O3 and MgO enter the sinter through raw materials. This work quantifies the effect of oxygen potential and fluxing components such as alumina and magnesia on the liquidus and phase relations of the sinter primary melts in the iron rich portion of CaO-FeO-Fe2O3-SiO2 system at sintering conditions. This is carried out by the means of new type of industrial diagrams in the form of Fe/CaO vs. SiO2 that can directly help the optimization of the sintering processes. Source

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