Browsing Makale Koleksiyonu by Author "Yekeler, M"
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Breakage parameters of some minerals and coals ground in a laboratory size ceramic mill
Ozkan, A; Yekeler, M; Aydogan, S (NATL INST SCIENCE COMMUNICATION, 2003)The kinetics of batch dry and wet grindings of calcite, barite, quartz, lignite and anthracite from feeds of sieve size 425+300 mum has been determined using a laboratory scale ceramic ball mill. The S-l values obtained ... -
Characterisation of surface roughness and wettability of salt-type minerals: calcite and barite
Yekeler, M; Ulusoy, U (MANEY PUBLISHING, 2004)Salt-type minerals of calcium (calcite) and barium (barite) are important raw materials for metallurgical. chemical and algricultural industries. Flotation is the primary process for recovering these minerals from ores. ... -
Coagulation and flocculation characteristics of celestite with different inorganic salts and polymers
Ozkan, A; Yekeler, M (ELSEVIER SCIENCE SA, 2004)Coagulation and flocculation characteristics of celestite were investigated using CaCl2, MgCl2 and AlCl3 and anionic (A-150), cationic (C-573) and non-ionic (N-100) flocculants, respectively. Isoelectric point of celestite ... -
Correlation of the breakage parameters with the critical surface tension for wetting of barite
Yekeler, M; Ozkan, A (ELSEVIER SCIENCE SA, 2003)In this paper, we present a correlation and experimental data for a relationship between the breakage and the wettability for barite mineral. The breakage parameters, which are readily obtained from grinding test, are the ... -
Correlation of the surface roughness of some industrial minerals with their wettability parameters
Ulusoy, U; Yekeler, M (ELSEVIER SCIENCE SA, 2005)This paper reports the relationships found between the surface roughness and wettability of some industrial minerals, namely, calcite, barite, talc and quartz. These minerals were ground in ball, rod and autogenous mills ... -
Critical solution surface tension for oil agglomeration
Ozkan, A; Aydogan, S; Yekeler, M (ELSEVIER SCIENCE BV, 2005)This paper presents the effect of surface tension of solution used as medium for the oil agglomeration of minerals. Naturally occurring hydrophobic and hydrophilic minerals are used in this study. It was determined that ... -
Determination of the breakage and wetting parameters of calcite and their correlations
Yekeler, M; Ozkan, A (WILEY-V C H VERLAG GMBH, 2002)This paper presents the breakage and wetting parameters of calcite mineral obtained experimentally and establishes a correlation between these characteristic parameters. The breakage parameter obtained from the different ... -
Determination of the shape, morphological and wettability properties of quartz and their correlations
Ulusoy, U; Yekeler, M; Hicyilmaz, C (PERGAMON-ELSEVIER SCIENCE LTD, 2003)The distributions of particle sizes and shapes are of great importance to industries employing various materials in powdered form. These include many of the raw materials in civil and chemical engineering, pharmaceutical, ... -
Dry grinding kinetics of binary mixtures of ceramic raw materials by Bond milling
Ipek, H; Ucbas, Y; Yekeler, M; Hosten, C (ELSEVIER SCI LTD, 2005)The kinetics of batch dry grinding of binary mixtures of ceramic raw materials, namely quartz-kaolin, quartz-potassium feldspar and kaolin-potassium feldspar, from the feed sizes of -3.350 + 2.360, -2.000 + 1.400, -0.850 ... -
Effect of particle shape and roughness of talc mineral ground by different mills on the wettability and floatability
Yekeler, M; Ulusoy, U; Hicyilmaz, C (ELSEVIER SCIENCE SA, 2004)In this study, shape characteristics of talc particles produced by ball, rod and autogenous mills were investigated using Scanning Electron Microscope (SEM) and expressed by the shape descriptors such as elongation, flatness, ... -
Effect of the hydrophobic fraction and particle size in the collectorless column flotation kinetics
Yekeler, M; Sonmez, I (ELSEVIER SCIENCE BV, 1997)In order to investigate the particle size effect of a highly hydrophobic mineral (talc), different size fractions were floated in a column flotation cell to obtain the effect of flotation-rate constants (k) on the kinetics ... -
Effects of the shape properties of talc and quartz particles on the wettability based separation processes
Hicyilmaz, C; Ulusoy, U; Yekeler, M (ELSEVIER SCIENCE BV, 2004)Shape properties of talc and quartz particles ground by a laboratory size ball, rod, and autogenous mills were studied using scanning electron microscope (SEM). More than 100 particles were measured to do the shape analysis ... -
Fine dry grinding of zeolite in a laboratory ball mill
Ozkan, A; Yekeler, M (WILEY-V C H VERLAG GMBH, 2003)This paper presents the importance and usage of natural zeolites, which was recently recognized in the industry. Therefore, the grinding properties of natural zeolite were studied with the emphasis on a kinetic study in a ... -
Flotation responses to the morphological properties of particles measured with three-dimensional approach
Hicyilmaz, C; Ulusoy, U; Bilgen, S; Yekeler, M (ELSEVIER SCIENCE BV, 2005)Morphological properties of barite particles ground by autogenous and ball milling were examined by three-dimensional methods, namely, Brunauer-Emmett-Teller (BET) nitrogen adsorption and Permaran methods in terms of surface ... -
Kinetics of dry grinding of industrial minerals: calcite and barite
Teke, E; Yekeler, M; Ulusoy, U; Canbazoglu, A (ELSEVIER SCIENCE BV, 2002)This paper presents the kinetics study of dry ball milling of calcite and barite minerals. The experimental mill used was a laboratory size of 209 nun diameter, 175 mm length, providing a total 3 mill volume of 6001 Cm, ... -
Kinetics of fine wet grinding in a laboratory ball mill
Yekeler, M; Ozkan, A; Austin, LG (ELSEVIER SCIENCE SA, 2001)The kinetics of batch wet grinding of quartz from a feed of 600 x 425 mum to a product of 80% less than 8 mum have been determined using sieving and laser diffractometer sizing for size analysis. A dispersing agent was ... -
Kinetics of wet versus dry grinding of lignite by a porcelain mill
Ozkan, A; Yekeler, M (NATL INST SCIENCE COMMUNICATION-NISCAIR, 2002)The kinetics of dry versus wet grinding of several feed size fractions of lignite in a laboratory size porcelain mill are reported here using feed fractions prepared to 600+425, -425+300 and -300+212 mum mono-sizes. The ... -
Molecular modeling study on the relative stabilities of the flotation products for arsenic-containing minerals: dixanthogens and arsenic(III) xanthates
Yekeler, M; Yekeler, H (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2005)The interactions of As(III) ion with C2H5OCS2- and C2H5SCS2-, known as the most popular collector ions, were studied by density functional theory (DFT) at the B3LYP/6-31G** level in connection with the arsenic-containing ... -
A new microcolumn flotation cell for determining the wettability and floatability of minerals
Ozkan, A; Yekeler, M (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2003)Flotation is one of the most important physicochemical processes for mineral separations and other recovery operations. Flotation machines have been developed since the beginning of the 19th century and are still under ... -
Prediction of the wettability characteristics of some minerals from their breakage parameters
Yekeler, M; Ozkan, A (ELSEVIER SCIENCE BV, 2003)In this contribution, the breakage and wettability properties of calcite and barite minerals were presented and some correlations were established between these experimentally determined parameters. The gamma(c) relates ...