Gospodarka Surowcami Mineralnymi - Mineral Resources Management

In the paper the basic limitations and difficulties in the geostatistical methods using for geological evaluation of deposits has been presented. The following factors, such as: number and spacing of data. measurement and data preparation erorrs. anisotropy and heterogenity of a deposit, knowledge and experience gained in practical application of geostatistics have been discussed. Conclusions deal with rules of deposits variabilities modeling and its usage in reserves estimation. It has been emphasized that the variability structure of the parameters considered in reserves calculation should be analysed more deeply and results of the studies should be also more widely interpreted. When anisotropy or heterogeneity are evident they should be taken into account in resources/reserves estimation. Befor starting the study ofa deposit variability structure it is advisable to carry out a detail statistical analysis of the available data. The analysis should also include constraction of correlation diagrams. It is also indispensable to verify variogram models of the parameters which are taken into account in reserves estimation with cross-validation technique.

The paper presents results of analysis of accompanying elements' content in raw materials, products, semi-finished products and wastes in ISP technology. Close to the main elements, there are accompanying elements Fe, Cu, As, Cd, Sb, Tl in metallurgical process of zinc, lead and cadmium production. Determination of the elements' content was done with the use of spectrometry with inductively activated plasma (AES-ICP), which allows for precise and convenient analysis of concentration of elements appearing in minute quantities in analysed materials. Knowledge ofelements' content allows for definition ofmaterials characterised by increased concentration of the analysed elements, which gives the basis for defining the proper method of obtaining some elements and analysing of possible negative influence of some toxic elements.

Materials ofzinc metallurgical process comprise many accompanying elements such as Fe, As, Cu, Cd, Sb, Tl. Content of these elements depends on chemical constitution of raw materials and the course of technological process. During manufacturing process accompanying elements concentrate which gives opportunities of its recovery but also the danger of its increased discharge into the environment appears. Determining of accompanying elements' concentration and forms of its occurrence in particular materials in all technological knots gives the knowledge of its distribution in metallurgical process. which allows to determine possibilities of its recovery and estimation of its influence upon environment. This paper presents metallurgical balance-sheet which shows dependence between raw materials and products, which is basis for assessment of the accompanying elements retrieval and influence on environment.

The article presents mathematical model introduced to modelling and optimisation method of mining works in hard coal mine with an application of stochastic networks. Presented method could be an useful tool to design process of future mining works in coal mine, according to technical and economical plans.

Analysis of securitization's application for assets in coal mining company is the main subject in this article. The analysis above was done on the basis on the company AAA SA from coal mining industry.

In the paper the increasing underground and overall productivity in Polish hard coal mining in the years 1993-2005 are shown on an example of the mines belonging to Kompania Węglowa S.A. Changes of these indicators resulting from the output and employment are shown as well.

In polymetalic deposits of the copper ore there is also contained lead, which during flotation process is concentrated together with copper in the froth product. In pyrometallurgical processing ofthe copper concentrates it is a requirement that the lead contents should not exceed I%, while the contents of this undesired component (lead) are often even above 2%. The carried out studies aimed at obtaining maximum recovery of tead, from the copper concentrates by hydrometallurgical method, at as low as possible energy consumption even at the expense of the process time prolongation. It was found that the lead contents in the concentrate could be lowered by the hydrometallurgical method applied even to a value of0.13% Pb. However, a level of0.8-0.6% Pb contents was found to be rational and possible to be reached during twenty-four hours processing. A characteristics of metal contents in acetate leaching solutions was performed and a rational way of utilization of their extractive capacity was evaluated.