The run length of cracking furnaces is limited by the formation of coke on the internal skin of the reactor tubes. The reaction mechanism of thermal cracking of hydrocarbons is generally accepted as free-radical chain reactions. On the basis of the plant output data and the insight in the mechanisms for coke formation in pyrolysis reactors, a kinetic model describing the coke formation has been...

The metallurgical property of sinter is an important factor affecting the smooth operation blast furnaces (BF), because it has a great impact on permeability BF and solid fuel rate. In order to promote combustion mineralization flux in sintering process, eventually improve strength sintered ore, series investigation segregation granulation by coating were carried out, including pot experiments,...

the estimation of metallurgical parameters of flotation process from froth visual features is the ultimate goal of a machine vision based control system. in this study, a batch flotation system was operated under different process conditions and metallurgical parameters and froth image data were determined simultaneously. algorithms have been developed for measuring textural and physical froth ...

B.Gajdzik, Silesian University of Technology, Faculty of Materials Science and Metallurgy,Katowice, Poland On the basis of report analysis which presents situation in metallurgical sector after 2008 the range of changes implemented in management of metallurgical enterprises was characterised. A defi nition approach to crisis management was suggested as the process when the enterprise is managed...

B. Gajdzik, The Silesian University of Technology, Faculty of Materials Science and Metallurgy, Katowice, Poland J. Sitko, The Silesian University of Technology, Faculty of Organization and Management, Zabrze, Poland The publication presents the causes of complaints about metallurgical products, illustrated with an example of steel sheets, with a particular focus on the reasons having their sou...

Phosphorus contents of coal from around the world vary although there is a tendency for Permian coals from India and Australia, and Cretaceous coals from Western Canada to have more phosphorus than Carbcmiferous coals from Europ+ and USA (Table 1). This may be because of the evolution of vegetation type over geological time or because of the conditions in the coal swamps. Data presented here su...

The aim of the article was the presentation of the ecological eff ects achieved in the metallurgical company in Poland after privatization and overall, thorough restructuring. For the need to conduct privatization of the state-owned enterprises and their restricting resulted from the transformation of the national economy. The market system forced the introduction of the changes in the function...

In his article on poetry in health care education, Neil Pickering puts forward an argument of radical unpredictability: as we can never know in advance how a poem will be interpreted, it can be of no external use.(1) It is, however, exactly this potential to give rise to multiple interpretations that makes the poem valuable. We hold that the poem should be read and discussed with no other inten...

Different g-C3N4 composite systems (coke carbon/g-C3N4, Bi/Bi2WO6/g-C3N4 and Bi/Bi2MoO6/g-C3N4) have been assessed as photocatalysts for wastewater pollutants removal. The coke carbon/g-C3N4 hybrid, produced by thermal treatment at 550 °C of a composite made from melamine cyanurate and coke, only showed activity under UV-light irradiation. On the other hand, inorganic Bi spheres/Bi mixed oxides...

The catalytic dehydrogenation (DH) and oxidative dehydrogenation (ODH) of light alkanes are of significant industrial importance. In this work both carbonaceous material deposited on VOx/Al2O3 catalysts during reaction and unsupported carbon nanofibres (CNFs) are shown to be active for the dehydrogenation of butane in the absence of gas-phase oxygen. Their activity in these reactions is shown t...