Kozub S. Technology of recovery of cadmium substances from the wastage

The object of research: technology of recovery of nickel and cadmium from the waste. The aim: to study the scientific foundations of technology recycling industrial wastes containing cadmium to produce compounds of cadmium, nickel and iron. Research methods and apparatus: thermodynamic, microscopic (microscope МIN-8), an optical microscope (МIK-8), a raster electronic microscope (REM-100U), X-ray (DRON-3M), thermogravimetric (derivatograf R-1500D system F. Paulik -J. Paulik-L. Erdeu), chemical analysis methods of materials and complex physical and mechanical methods. Theoretical and practical results: based on the developed scientific positions and the obtained experimental data it was proposed technological regimes and the sequence of the production process of waste nickel-cadmium batteries, developed technological scheme of production of nickel and cadmium from recycled materials. Novelty: the results of thermodynamic calculations, the values of mass concentrations of acid, at which begins the formation of nitrogen oxides, the chemistry of their formation was also proposed. It was established that the kinetics of dissolution for each part has from one to three macrokinetic zones. It was defined the pH value of sedimentation processes for compounds of iron, nickel and cadmium and confirmed the possibility of selective deposition. Degree of introduction: the results are recommended for application in the educational process of NTU "KhPI". Industry of use: scientific results can be used to develop processes to extract iron, nickel and cadmium from the waste that they contain, as well as the chemical industry.