RECOVERY OF MANGANESE FROM STEEL SLAG AND DUST BY DIFFERENT TECHNOLOGIES
This paper describes a few examples of the recovery of manganese from steel slag and dust by using different technologies based on acid leaching.Reductive leaching in sulfuric acid (H2SO4) for recovery of manganese from electric arc furnace dust (EAFD) was represented. Recovery of manganese and iron was increased with increasing in the sulfuric aci...
By Aida Imamović, Raza Sunulahpašić, Amna Hodžić
PHASE EQUILIBRIA OF THE Cu-In-Ni TERNARY SYSTEM AT 300 °C
This study reports experimental and thermodynamic investigation of the Cu-In-Ni ternary system at 300 °C. Isothermal section of the Cu-In-Ni system at 300 °C was calculated using optimized thermodynamic parameters for the constitutive binary systems from literature. Microstructure analysis of selected alloy samples after long time annealing...
By Aleksandar Đorđević, Milena Premović, Duško Minić, Vladan Ćosović, Milutin Živković, Dragan Manasijević, Milan Kolarević
THE QUALITY OF GI25 OIL PUMP COVER CASTING MADE IN MOLD OF BENTONITE MIXTURE OF
In the technology of bentonite mixture mold unexplored fields are the properties of a mixture of a quartz sand fraction 0.106 mm, 0.3 mm and 0.425 mm and the possibility of stacking in horizontal layers in the mold. The investigation is related to the layers of the following combination of sand fractions: 0.3 / 0.106 / 0.425 mm, 0.106 / 0.425 / 0.3...
By Ajla Huseljić, Ana Beroš, Hasan Avdušinović
EXAMPLE OF DECARBURISING PHENOMENA DURING THE CARBURASING HEAT TREATMENT PROCESS
Carburizing is a very popular method of thermochemical treatment to increase the surface hardness of steel parts. It is achived by heating the steel at an austenite temperature in an environment of appropriate carbon source. Carbon sources provide the corresponding so-called a carbon potential (C potential). In the case of equilibrium state, the ca...
By Jusuf Duraković, Almaida Gigović-Gekić, Belma Fakić
OPTICAL MICROSCOPY EVALUATION OF PORTLAND CEMENT CLINKER - ACETIC ACID ETCHING PREPARATION
The microscope has become a more common tool in the cement industry. Evaluation of clinker using microscopy is a powerful technique that can help improve clinker production and cement quality. The key to using the microscopy is understanding the process of clinker production namely how raw materials are transformed into clinker. These transformatio...
By Nevzet Merdić, Nedžad Haračić, Ilhan Bušatlić, Nadira Bušatlić, Adis Merdić
THE INFLUENCE OF CLINKER DUST ON BLAST FURNACE CEMENT PROPERTIES
Clinker dust or cement kiln dust (CKD) is fine granulated material which generate during the thermal treatment of raw meal and during the clinker cooling process. By applying different methods in certain stages of the technological process it is possible to extract the mentioned dust. The chemical composition of the clinker dust depends on type and...
By Nevzet Merdić, Nedžad Haračić, Ilhan Bušatlić, Nadira B Bušatlić, Zehrudin Osmanović, Nisad Avdić
EVALUATION OF THE MICROSTRUCTURE AND PHASE TRANSITION TEMPERATURES OF THE Cu-9%Al-8%Mn SHAPE MEMORY ALLOY
Shape memory alloys (SMAs) belong to the group of advanced functional materials for numerous technical applications. Among many known Cu-based shape memory alloys, Cu–Al–Mn ternary alloys are characterized by a combination of good shape memory properties and excellent ductility which makes them commercially attractive.In this work the C...
By Dragan Manasijević, Tamara Holjevac-Grgurić, Ljubiša Balanović, Uroš Stamenković, Radiša Todorović, Milan Gorgievski1, Mirko Gojić
OPTIMISATION OF CHAMBER FURNACE TECHNOLOGICAL PARAMETERS FOR HIGH CHROMIUM STEEL ROLLS HEAT TREATMENT
In this work, industrial control technical measurements of the heat treatment of high chromium steel (HCS) rolls is presented.Measurements were carried out on the gas fired car bottom chamber furnace Bosio PP-KP 70/1150 in the company Valji d.o.o., Štore, Slovenia. Temperature measurements of the individual heating zones of the furnace, roll...
By Blaž Karpe, Simon Rečnik, Aleš Nagode, Borut Kosec, Sergej Novak, Stjepan Kožuh
THE MICROSTRUCTURE OF THE SCALE FORMED DURING THE HIGH TEMPERATURE OXIDATION OF A FeCrAl ALLOYS
FeCrAl alloys have good oxidation resistance at elevated temperature owing to the formation of a continuous Al2O3 surface film, which acts as an oxygen diffusion barrier. The aim of the present study was to investigate the early stages of protective oxide layer formation and its growth on specially prepared commercial FeCrAl alloys, Kanthal AF (K-A...
By Stojana Veskovič, Milan Bizjak, Blaž Karpe, Aleš Nagode, Samo Smolej, Janez Kovač, Gorazd Kosec
MICROSTRUCTURE OF METALLS COATINGS NiCrAlY
In conducted research was made a characterisation of microstructure and powder NiCrAlY, before and after applying on the base material. Coating was carried out by using HVOF Diamond Jet procedure, which uses the kinetic energy of the metal particles produced by on explosion of combustible gases. Characterisation was based on chemical analysis of me...
By Milenko Rimac, Mirsada Oruč, Gorazd Kosec