CONTENS
In honor of Professor Janusz S. Laskowski on the 40th Anniversary of the Physicochemical Problems of Mineral Processing 5
J.S. Laskowski, Testing flotation frothers 13
M.E.Holuszko, J.S. Laskowski, Use of pelletization to assess the effect of paticle-particle interactions on coal handleability 23
M.T.Spyridopoulos, S.J.R. Simons, S.J. Neethling, J.J. Cilliers, Effect of humic substances and particles on bubble coalescence and foam stability in realation to dissolved air flotation processes 37
J.Drzymala, H. Ahmed, Effect of flotation procedure and composition of reagents on yield of difficult-to-float coal 53
V.A.Chanturiya, W.E. Vigdergauz, L.M. Savkisova, A.I. Dorofeev, The hydro-philic-hydrophobic transitions on chalcopyrite; electrochemical study 65
Z.Ekmekçi, A. Aslam, H. Hassoy, Effect of EDTA on selective flotation of sulphide minerals 79
L.Ergün, Z. Ekmekçi, Ő. Gülsoy, H. Benzer, The evoluation of copper flotation plant performance by plant survey and laboratory tests 95
B.Beklioglu, A.I. Arol, Selective flocculation behavior of chromite and serpentinite 103
L.Gotfryd, J. Szymanowski, Recovery of zinc(II) from acidic sulfate solutions. Simulation of counter-current extraction-stripping process 113
M. Rozenblat, M. Regel-Rosocka, J. Szymanowski, Metal removal from spent pickling solutions of high zinc(II) concentration 121
M.Ulewicz, C. Kozlowski, W. Walkowiak, Removal Zn(II), Cd(II) iand Cu(II) ions by polymer inclusion membrane with side-armed diphosphaza-16-crown-6ethers 131
P.Maciejewski, W. Walkowiak, Selective removal of cesium(I), strontium(II) and barium(II) cations with proton-ionizable lariat ethers in the ion flotation process 139
A. Heim, T.P. Olejnik, A. Pawlak, The effect of the number of contact points between grinding elements on the rate of grinding in ball mills 147
A. Heim, R. Kazimierczak, A. Obraniak, The effect of equipment and process parameters on torque during disk granulation of bentonite 157
A. Heim, T. Gluba, A. Obraniak, Bed dynamics during drum granulation 167
T.Gluba, A. Obraniak, E. Gawot-Młynarczyk, The effect of granulation conditions on bulk density of a product 177
L. Domka, M. Kozak, Tribochemically activated natural chalk as a filler for plasto- and eleastomers 187
F. Ciesielczyk, A. Krysztafkiewicz, T. Jesionowski, Influence of precipitation parameters on physicochemical properties of magnesium silicates 197
K.St. Sztaba, Influence of grain size upon its falling velocity 207
A.S. Erdem, S.L. Ergün, A.H. Benzer, Calculation of the power draw of dry multi-compartment ball mills 221
L. Ergün, Z. Ekmekçi, Ő. Gülsoy, H. Benezer, Modeling and simulation of the grinding circuit in Madneuli copper concentrator 231
Ő. Genç, L. Ergün, H. Benzer, Single particle impact breakage characterization on of materials by drop weight testing 241
P. Wodziński, Crude ore screening in copper industry 257
J. Farbiszewska-Kiczma, T. Farbiszewska, M. Bąk, Bioleaching of metals from Polish black shale in neutral medium 273
M. Pacholewska, Bioleaching of galena flotation concentrate 281
A. Uryga Z. Sadowski. A. Grotowski, Bioleaching of cobalt from mineral products 291
Ő.Y. Gülsoy, E.C. Orhan, Importance of magnet-steel configuration in dry high intensity permanent magnetic rolls: Theoretical and practical approach 301
M.H. Khedr, Effect of firing temperature and compacting pressure on the magnetic and electrical properties of nickrl-ferrite 311
Z. Őzdemir, G. Őzbayoğlu, M. Kizilyalli, A. Yilmaz, Synthesis and characterization of lithium triborate 321
A. Muszer, Mineralogical characteristics of metallurgical dust in the vicinity of Glogow 329
T. Chrzan, Influence of mineral composition of melaphyre grits on durability of motoway surface 341
I. Polowczyk, Z. Sadowski, Effect of polymer-surfactant interaction onto the spherical agglomeration 351