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Validation of FeSiMg Alloy Production Model for the Experimental Process
Saeed Ghali,Mamdouh Eissa,Hoda El-Faramawy
Journal of Metallurgy , 2012, DOI: 10.1155/2012/176968
Abstract: This paper investigates the effect of limestone, bauxite, fluorspar, and quartzite additions on the magnesium recovery in FeSiMg production from dolomite. Also, it illustrates the validation of the previous designed model. According to the model, magnesium content in the product alloy is calculated by the equation [Mg]=(MgO0)[Si0][[(MgO0)?[Si0]]?1]/((MgO0)[[(MgO0)?[Si0]]]?[Si0]), where [Mg] is the concentration of magnesium metal in ferrosilicon magnesium alloy in mol/L, [Si0] and (MgO0) are the initial concentrations of silicon and magnesium oxide in charge in mol/L, is the time in seconds, and is the reaction rate constant (3.26588×10?7 LSec−1 mol−1). The results of the production process are compared with the model results. The deviation between the actual and predicted magnesium content decreases as fluorspar, limestone, and quartzite increase up to 12.8wt.%, 8wt.%, and 8wt.%, respectively, with increase in the amount of the additives, the magnesium content in the produced alloy becomes far from the predicted values. It was found also that the addition of bauxite increases the gap between the actual and predicted values of magnesium content. It was found that the deviation of the actual magnesium content from the predicted depends mainly on the viscosity of the slag.
Analysis of quality and cost of FeSiMg treatment master alloy vs. cored wire in production of ductile cast iron  [PDF]
E. Guzik
Archives of Foundry Engineering , 2008,
Abstract: The results of studies on the use of FeSi5%Mg magnesium alloy in modern cored wire injection method for production of nodular and vermicular graphite cast irons were described. The injection of Mg cored wire length is a treatment method which can be used to process The injection of Mg cored wire length is a treatment method which can be used to process iron melted in an electric induction furnace. This paper describes the results of using a high-magnesium ferrosilicon alloy in cored wire (Mg recovery 47-70%) for the production of vermicular and nodular graphite cast irons at in at least 13 foundries. The results of calculations and experiments have indicated the length of the cored wire to be injected basing on the initial sulfur content and weight of the treated melt. The results of numerous trials have shown that the magnesium cored wire process can produce high quality nodular and vermicular graphite irons under the specific industrial conditions of the above mentioned foundries. It has also been proved that in the manufacture of nodular graphite iron, the cost of the nodulariser in the form of elastic cored wire is lower than the cost of the FeSiMg5 master alloys.
Enhance Production Rate of Braiding Machine Using Speed Reduction Technique  [PDF]
Manoj A. Kumbhalkar,Sachin V. Mate,Sushama Dhote,Mudra Gondane
International Journal on Theoretical and Applied Research in Mechanical Engineering , 2013,
Abstract: Textile designing is a technical process which includes different methods for production of textile, surface design and structural design of a textile. Braid is the textile product having various types like round and flat braid made by using textile threads or wires which are alternatively interwoven in braiding machine. A small scale industry in Nagpur produces each type of cotton braids using 16 spindle braiding machines on the single line shaft acquired power from 0.50 HP motor runs at 1440 rpm with the production rate of 87.5 m/hr. This paper discusses about to increase production of braids and design parameters of braiding machine. The production rate has been improved by modifying the some parameters by maintaining quality of braid as per the today’s market is concerned.
Electrolytic reduction of mixed solid oxides in molten salts for energy efficient production of the TiNi alloy
Yong Zhu,Meng Ma,Dihua Wang,Kai Jiang,Xiaohong Hu,Xianbo Jin,George Z. Chen
Chinese Science Bulletin , 2006, DOI: 10.1007/s11434-006-2105-1
Abstract: Direct electrochemical reduction of mixed TiO2 and NiO powders to TiNi alloy has been successfully demonstrated in molten CaCl2 at 900°C by constant voltage electrolysis. The electrolysis energy consumption was as low as 23.4 kWh/kg-TiNi, although the current efficiency was 20.5% in the preliminary experiments. During the process, NiO was first reduced to Ni at high speed, accompanied by TiO2 being perovskitized to CaTiO3-x which was gradually reduced to Ni3Ti and TiNi, assisted by the depolarization of the preformed Ni. The cell voltage for preparation of the TiNi alloy was lower than that for Ti. Adjusting the cell voltage not only affected the reduction speed, but also offered a convenient access to the preparation of the nickel/perovskite composite.
Use of Value Analysis Technique for Cost Reduction in Production Industry – A Case Study
Mr. Chougule M.A.,Dr. Kallurkar S.P.
International Journal of Engineering Science and Technology , 2012,
Abstract: This paper present the basic fundamental of Value Analysis that can be implemented in any product to optimize it’s value. A case study of a Universal Testing Machine (UTM) is discussed in which the material,design of components is changed according to the value engineering methodology. In the present case study, it is observed that the unnecessary increase in cost is due to the use of expensive material, increase in variety of hardware items and thereby increasing the inventory and so on. Therefore we have selected some components from UTM and we have applied Value Analysis technique for the cost duction of the some components of UTM.
PREPARATION OF ULTRAFINE ALLOY POWDER BY REDUCTION OF COMPLEX OXIDE
QIAN Yitai FU Peizhen CAO Guanghan CHEN Zuyao University of Science,Technology of China,Hefei,China Associate Professor,
QIAN Yitai FU Peizhen CAO Guanghan CHEN Zuyao University of Science and Technology of China
,Hefei,China Associate Professor

金属学报(英文版) , 1992,
Abstract: The ultrafine alloy powders,CuRh,γ-Ni_(0.33)Fe_(0.66) and α-Fe_(0.66)Co_(0.33) of size less than 35 nmwere prepared by reduction of complex metallic oxides under atmosphere of 15% H_2 and85%Ar.
Quality and Cost Assessment of Treatment with SiMg and NiCuMg Master Alloys vs Cored Wire in Production of Ductile Iron  [PDF]
E. Guzik
Archives of Foundry Engineering , 2007,
Abstract: The results of studies on the use of magnesium alloy in modern cored wire injection method for production of nodular and vermicular graphite cast irons were described. The injection of Mg cored wire length is a treatment method which can be used to process high sulphur cupola iron held in ladles or iron melted in an electric induction furnace. This paper describes the results of using a high-magnesium ferrosilicon alloy in cored wire (Mg recovery 47-70% ) for the production of vermicular and nodular graphite cast irons at cinawka Foundry, and for the production of nodular graphite iron at the following foundries: GZUT, KRAKODLEW, Centrozap - DEFKA, EE Zawiercie, WSK–Rzeszów, FWM PRZYSUCHA, HSW Stalowa Wola and PIOMA. The results of calculations and experiments have indicated the length of the cored wire to be injected basing on the initial sulfur content and weight of the treated melt. The results of numerous trials have shown that the magnesium cored wire process can produce high quality nodular and vermicular graphite irons under the specific industrial conditions of the above mentioned foundries. It has also been proved that in the manufacture of nodular graphite iron, the cost of the nodulariser in the form of elastic cored wire is lower than the cost of the FeSiMg or NiCuMg master alloys.
Peak reduction technique in commutative algebra  [PDF]
Vladimir Shpilrain,Jie-Tai Yu
Mathematics , 1999,
Abstract: The "peak reduction" method is a powerful combinatorial technique with applications in many different areas of mathematics as well as theoretical computer science. It was introduced by Whitehead, a famous topologist and group theorist, who used it to solve an important algorithmic problem concerning automorphisms of a free group. Since then, this method was used to solve numerous problems in group theory, topology, combinatorics, and probably in some other areas as well. In this paper, we give a survey of what seems to be the first applications of the peak reduction technique in commutative algebra and affine algebraic geometry.
Gel-combustion synthesis of CoSb2O6 and its reduction to powdery Sb2Co alloy  [PDF]
MAJA JOVIC,MARINA DASIC,KONRAD HOLL,DEJAN ILIC
Journal of the Serbian Chemical Society , 2009,
Abstract: Sb2Co alloy in powdery form was synthesized via reduction with gaseous hydrogen of the oxide CoSb2O6, obtained by the citrate gel-combustion technique. The precursor was an aqueous solution of antimony nitrate, cobalt nitrate and citric acid. The precursor solution with mole ratio Co(II)/Sb(V) of 1:2 was gelatinized by evaporation of water. The gel was heated in air up to the temperature of self-ignition. The product of gel combustion was a mixture of oxides and it had to be additionally thermally treated in order to be converted to pure CoSb2O6. The reduction of CoSb2O6 by gaseous hydrogen yielded powdery Sb2Co as the sole phase. The process of oxide reduction to alloy was controlled by thermogravimetry, while X-ray diffractometry was used to control the phase compositions of both the oxides and alloys.
The Application of Setup Reduction in Lean Production  [cached]
Lixia Chen,Bo Meng
Asian Social Science , 2010, DOI: 10.5539/ass.v6n7p108
Abstract: Setup reduction is an important tool in lean production to realize quick setup change and meet the demands of individualized customers. The paper introduces related concepts of setup reduction, analyzes the reason for deploying it in the view of economic theory and lean principles, and proposes six-step approach to setup reduction in detail, which is practicable and feasible for any enterprise to deploy immediately in multi-specification and small-batch production environments.
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