Gospodarka Surowcami Mineralnymi - Mineral Resources Management

Cobalt- due to its unique properties and diverse applications, especially in high technologies - is recognised as a strategic metal. The article discusses prospects and possible limitations of this metal utilisation in the future as well as the demand forecast until 20 I O. The most promising from the view-point of future cobalt consumption is the development of rechargeable Li-ion batteries, hybrid gas-electric vehicles, superalloys, catalysts, cemented carbides and diamond tools. The most important phenomena observed in the global market in recent decades were abo characterised, e.g. depreciation of African countries position and the move of major centres of cobalt production and consumption from Western Europe and the USA to Asia, especially vigorous China. Statistics of trade and consumption of cobalt in Poland as well as prospects for its market development there were also briefly presented.

Present analytical methods allow to mark a very low iodine and its compounds concentration in field conditions. As a result, during the last decade many papers related to the iodine distribution in the global scale were published. Quantity and its distribution in the Earth's crust were estimated. In this article the mechanism of iodine aerosols origin and the role ofmarine organisms in this process were explained. Metastable compounds originated as a product of photolysis were identified; as a result a separate branch of science concerning their origin was created. The novelty is also identification of the anthropogenic radioactive iodine isotope 129I in natural environment. The isotope was applied in practice as a marker of contemporary geological processes dynamics and as an instrument of absolute age determination of geological formations in the lithosphere.

In the paper the possibilities of coal utilization in Poland in an aspect of clean coal technologies and possibilities of production liquid fuels from coal are analyzed. Possibility of engage of the collieries: Piast and Ziemowit and Chemical Company DWORY S.A. in the process are shown

A notion ofwaste mineral resources (accumulated as by-products during mining and processing activity) and anthropogenic mineral deposits were defined. A formal (legal) status of such deposits in Poland was discussed. Two valuation methods of anthropogenic mineral deposits were presented which were discussed by the same authors in their textbook (Uberman R., Uberman R. 2005) in relation to natural mineral deposits: the Discounted Cash Flow method and the Standard Measure of Oil and Gas method, the latter being an indirect application of the well known Hotellings theorem. A case illustrating application of these methods was also included.

The article presents the results of a research into the pressure generated by samples of selected bituminous coals and blends made from these coals during carbonization carried out under the conditions of constant volume and limited expansion. The structure of the apparatus used in research enables the simulation of the effects occurring in the coking chamber affecting the level of pressure generated in the plastic layer in two characteristic coking stages. In the early phase of coking, when plastic layers head for the middle part ofthe chamber and there is unplasticized coal charge between them (carbonization under the conditions of limited expansion) and at the moment of plastic layers combining in the chamber's axis (carbonization in constant volume). During research it was found that considerable fluidity of the plastic coal mass forming the charge blend and similar temperature range of plasticity facilitate the generation of high pressure in the plastic layer during coking. Simultaneously, under these conditions high intensity may characterize the migration of the plasticized coal substance outside the area of the plastic layer as well as the compression of the unplasticized part of the charge, that is the effects which relatively lower the pressure in the plastic layer. Adding to the composition of the blend coal generating higher pressure during carbonization than other components and plasticizing within the same temperature range as other ingredients of the blend, we have to take into account the rise of the pressure generated by such a charge. Whereas effective reduction of the coking pressure may be attained by adding to the charge coal plasticizing in significantly lower temperatures than other coals even if it is characterized by high coking pressure.

The experimental results for the fluidized jet grinding of granular materials are presented in the paper. The researches were performed on a laboratory fluidized bed opposedjet mill. The experiment contained grinding tests of selected narrow size fractions oflimestone in turbulent fluidized layer conditions. The aim of researches, content in part II article was to explain the influence of selected parameters process: the initial graining and the fed mass in the mill, the values of working air overpressure, the rotational speed of flow classifier rotor and duration of grinding test on the particle size distribution of grinding product. The determined particle size distribution of grinding products make it possible to estimate the quality and the efficiency of the carried out fluidized jet grinding tests.

The closure of native sulphur mines in the vicinity of Tarnobrzeg has reached a final stage. The open pit in Machów, isolated with 25-meters-thick clay layer, is successively filled with water from the Vistula River. In the Jeziórko borehole mine land remediation is under way and gravitational drainage system is under construction. Delay in closure operations took place in the area of the Piaseczno Mine where recreational center has been designed around a water reservoir of water table altitude 146.0 m a.s.l. The sali: closure and remediation of the Piaseczno open-pit requires the construction of drainage system in the area endangered by soaking. The current (data for the year 2006) hydrodynamic conditions and prognoses of future changes of aquatic environment possible in the post-mining land were analysed with the numerical filtration model. The results enabled the identification of the position of groundwater tables in Quaternary and Tertiary horizons along with the discharge of designed drainage systems.

An analysis of data on CO2 emission in Poland. originating from 16 voivodeship marshal offices. allowed to de line 161 plants of annual CO2 emission exceeding I 00 OOO t per year. Emiter numcrosity and emission size were characterized for each voivodeship. It was stated that for some voivodeships do exist favourable conditions to store carbon dioxide underground (kujawsko-pomorskie. mazowieckie. wielkopolskie and łódzkie voivodeships). However they do not exist for other ones: śląskie. dolnośląskie. lubelskie. opolskie. Works that have been started within frames of the GcoCapacity EU Project allow to recognize next geological structures. suitable for carbon dioxide underground sequestration.

W artykule zaprezentowano źródła pozyskiwania kapitału i finansowania działalności przedsiębiorstw. Scharakteryzowano wybrane źródła pozyskania kapitału obcego, do których zalicza się: kredyty bankowe i pożyczki, papiery komercyjne, faktoring, forfaiting, leasing, obligacje, sekurytyzację, Ponadto przedstawiono kryteria doboru żródeł finansowania.

In the paper there is described a procedure of creation of economic and financial data bases for longwalls. Special attention is paid on parameters of probability distributions of costs connected with the production process in longwall panels. Probability distributions of the costs can be used for stochastic simulation referred to planning prospective longwalls in similar geological and mining conditions aimed at evaluation of costs and estimation of risk.

The article presents application of modeling and optimization method in hard coal mine. Presented method could be an useful tool to design process of future mining works in coal mine, according to technical and economical plans.