Organisational units Laboratory

Laboratorija Laboratorija2

Work unit Laboratory of Rudnik and flotation “Rudnik” consists of departments for the preparation of samples for analysis and chemical department.
A representative samples is formed in the department for preparation. Materials that are analysed are samples of geological research, samples of ore that is processed, products of flotation concentrations and samples of final products – concentrates of lead, zinc and copper.
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.

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Contango d.o.o.

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Contango d.o.o. was founded on 15/09/2003.

The company was founded with the intention to engage in the trade of metals and their concentrates, as well as the final products of metal sector, as the core activity.