Samples of ore are in solid aggregate state. The preparation begins by crushing the sample to size less than 5mm. This is accomplished by crushing in jaw, then in cylindrical jaw crusher. Such crushed sample is truncated on Johnson divider. Next, the sample is milled on disc pulveriser (grain size 0.150 mm) and analytical representative sample is obtained by milling on vibratory pulveriser (grain size 0.074 mm – sample milled to “dead”). Such milled sample is homogeneous and ready for analysis.
Samples of technological process of flotation are in form of pulp – a mixture of ore and water. Preparation involves filtering samples, drying, truncation and homogenisation.
The elements that are determined are Pb, Zn, Cu, Au, Bi, Fe, S, Cd, As with standard chemical analyses by applying volumetric and gravimetric methods and method of cupellation. Methods are selected so as to enable provision of most accurate results. To make the operations that lead to them as short as possible, a new quantitative method of analysis was introduced in the laboratory “Rudnik” in January 2007 – Atomic absorption spectrophotometry, the ideal method for the analysis of ore.Perkin-Elmer atomic absorber with flame technology, with its quality, holds a leading position in the global market of optical instruments manufacturers.