Dariusz Foszcz

Application of Upgrading Curves for Evaluation of Past, Present, and Future Performance of a Separation Plant

The Fuerstenau upgrading plot, relating recovery of an ore component in concentrate (ϵ) versus recovery of the remaining components in the tailing (ϵ r ), was found suitable for analysis and evaluation of industrial separation data of five copper mineral processing plants. The past, present, and future performance of the flotation plants was analyzed with the Fuerstenau curve. It was found that all the plants tend to produce concentrates with the recovery of the remaining components in the tailing near ϵ r = 95.5%. Additional laboratory flotation tests using industrial final products provided industrial floatability of the ores. The industrial floatability curves had their maximum curvature at about ϵ r = 95.5%. This represents optimum of the industrial separation. Similarity of the industrial performance and the industrial upgradeability of the ores indicates that the flotation plants work near the optimum point as far as the recovery of the remaining components in the tailing is concerned. However, there is fluctuation of the industrial separation results of the other upgrading parameter (always two upgrading parameters are required), that is the recovery of the useful component (Cu) of the ore in the concentrate. For improved evaluation of the considered industrial separation, the reason of the fluctuation has to be determined. Finally, a simplified procedure of relating industrial and laboratory separation results is offered. It can be useful for predicting future industrial separation results.

Approximation of Partition Curves for Electromagnetic Mill with Inertial Classifier – Case study

The article presents the impact of the separation parameters on the operation of the grinding and classification system using the electromagnetic mill and impingement-inertial classifier specially designed for this machine. Preliminary tests for the classifier have been carried out, and the effect of the separation efficiency on the value of the recycle flow that optimizes the operation of the grinding system is determined. Fourteen experiments were carried out to test and evaluate the classifiers work, with a variety of damping flaps acting on the airflow. The results provide an accurate assessment of the effectiveness and efficiency of the classifier. The approximation of the electromagnetic mill partition curves using the impingement-inertial classifier was performed by using Weibull distribution function.

Comparison of energetic efficiency of stationary and mobile systems on the example of mineral aggregates production in Kieleckie Kopalnie Surowców Mineralnych S.A. : Porównanie efektywności energetycznej układów stacjonarnych i mobilnych na przykładzie produkcji kruszyw mineralnych w Kieleckich Kopalniach Surowców Mineralnych S.A.

Kieleckie Kopalnie Surowcow Mineralnych S.A. conduct exploitation in Tyree open pit mines: Ja wica, Laskowa and Winna. The exploitation is performed by means of blasting method. The yearly exploitation is about 3 million Mg (mine Ja wica — 1.8 million Mg, mine Laskowa — 0.5 million Mg and mine Winna — 0.7 million Mg). Limestones and Devonian dolomites are extracted in all three mines and are being used to production of: