[en] The radiotracer methods of evaluation of sewage flow rate, testing of effluent treatment plants and mixing patterns in natural streams have been described. Experimental works were carried out for industrial installations and natural streams. The results of investigations have been utilized for treatment process analysis and water pollution control. (author)

[en] Radiotracer technique was used for the investigation of material transport in a ball mill operated in open circuit and a closed-circuit system for grinding cement components. Mean residence times, mean linear velocities, and number of recycles have been determined. The coefficients of the filling of mill chambers with material have been estimated. The statistical relationship of mean residence time and mill operation conditions has been derived. (author)

[en] The sense and the possibility of radioactive and nonradioactive isotopic tracers application in investigations of the origin of oxygenic nonmetalic inclusions is presented. The discussed methods touch the investigations such as the origin of egzogenic inclusions which passed from external sources (fireproof lining, slag) to the steel or as the endogenic ones formed during the process of steel deoxidisation. The question of the tracers choice for refractory material and the further investigations concerned the determination of the origin of nonmetallic inclusions are discussed. The question of so called isotopic replacement tracers for the main steel deoxidizing agents is considered. The criterion of determination of oxygenic inclusions formed during the process of steel deoxidization is also discussed. Several results of laboratory and industrial investigations and also the examples of application of the discussed methods in the industrial scale are presented. (author)

[en] The results of the identification measurements performed in copper ore dressing plant in Lubin, by means of the radioactive isotopes are described. Values of the mean residence time for the rod and ball mills, classifiers and flotation machines, are quoted. (author)

[en] The method of determination of the pulse responses of industrial systems with recirculation by means of radiotracer experiments is described. An example of application of the method for system analysis in copper ore processing industry is discussed. (author)

[en] The principles are presented of the radioisotope tracer methods applied to the study of efficiency and kinetics of hydrometallurgic processes of leaching and liquid extraction and also to the study of the hydrodynamics of hydrometallurgic apparatus. These methods were applied in the investigations of the hydrometallurgical processing of materials from the copper industry and to the hydrodynamics of various types of leaching apparatus and of a bath for copper electrorefining. (author)